1 EXHIBIT 10.9 PDF SOLUTIONS, INC. 1997 STOCK PLAN (amended and restated as of June 30, 2000) 1. PURPOSES OF THE PLAN. The purposes of this 1997 Stock Plan are to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to Employees and Consultants of the Company and its Subsidiaries and to promote the success of the Company's business. Options granted under the Plan may be incentive stock options (as defined under Section 422 of the Code) or nonstatutory stock options, as determined by the Administrator at the time of grant of an option and subject to the applicable provisions of Section 422 of the Code, as amended, and the regulations promulgated thereunder. Stock purchase rights may also be granted under the Plan. 2. DEFINITIONS. As used herein, the following definitions shall apply: (a) "ADMINISTRATOR" means the Board or any of its Committees appointed pursuant to Section 4 of the Plan. (b) "AFFILIATE" means any entity which has a business relationship with the Company. (c) "BOARD" means the Board of Directors of the Company. (d) "CODE" means the Internal Revenue Code of 1986, as amended. (e) "COMMITTEE" means the Committee appointed by the Board of Directors in accordance with Section 4(a) of the Plan. (f) "COMMON STOCK" means the Common Stock of the Company. (g) "COMPANY" means PDF Solutions, Inc., a California corporation. (h) "CONSULTANT" means any person, including an advisor, who is engaged by the Company or any Parent, Subsidiary or Affiliate to render services and is compensated for such services, and any director of the Company whether compensated for such services or not, provided that if and in the event the Company registers any class of any equity security pursuant to the Exchange Act, the term Consultant shall thereafter not include directors who are not compensated for their services or are paid only a director's fee by the Company. (i) "CONTINUOUS STATUS AS AN EMPLOYEE OR CONSULTANT" means the absence of any interruption or termination of service as an Employee or Consultant. Continuous Status as an Employee or Consultant shall not be considered interrupted in the case of: (i) sick leave; (ii) military leave; (iii) any other leave of absence approved by the Administrator, provided that such leave is for a period of not more than ninety (90) days, unless reemployment upon the expiration of such leave is guaranteed by contract or statute, or unless provided otherwise pursuant to Company policy adopted from time to time; or (iv) in the case of transfers between locations of the Company or between the Company, its Subsidiaries or their respective 2 successors. For purposes of this Plan, a change in status from an Employee to a Consultant or from a Consultant to an Employee will not constitute an interruption of Continuous Status as an Employee or Consultant. (j) "EMPLOYEE" means any person, including officers and directors, employed by the Company or any Parent or Subsidiary of the Company, with the status of employment determined based upon such minimum number of hours or periods worked as shall be determined by the Administrator in its discretion, subject to any requirements of the Code. The payment by the Company of a director's fee to a Director shall not be sufficient to constitute "employment" of such Director by the Company. (k) "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended. (l) "FAIR MARKET VALUE" means, as of any date, the fair market value of Common Stock determined as follows: (i) If the Common Stock is listed on any established stock exchange or a national market system including without limitation the National Market of the National Association of Securities Dealers, Inc. Automated Quotation ("Nasdaq") System, its Fair Market Value shall be the closing sales price for such stock (or the closing bid, if no sales were reported), as quoted on such system or exchange, or the exchange with the greatest volume of trading in Common Stock for the last market trading day prior to the time of determination, as reported in The Wall Street Journal or such other source as the Administrator deems reliable; (ii) If the Common Stock is quoted on the Nasdaq System (but not on the National Market thereof) or regularly quoted by a recognized securities dealer but selling prices are not reported, its Fair Market Value shall be the mean between the high bid and low asked prices for the Common Stock for the last market trading day prior to the time of determination, as reported in The Wall Street Journal or such other source as the Administrator deems reliable; or (iii) In the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Administrator. (m) "INCENTIVE STOCK OPTION" means an Option intended to qualify as an incentive stock option within the meaning of Section 422 of the Code, as designated in the applicable written option agreement. (n) "NONSTATUTORY STOCK OPTION" means an Option not intended to qualify as an Incentive Stock Option, as designated in the applicable written option agreement. (o) "OPTION" means a stock option granted pursuant to the Plan. (p) "OPTIONED STOCK" means the Common Stock subject to an Option or a Stock Purchase Right. (q) "OPTIONEE" means an Employee or Consultant who receives an Option or a Stock Purchase Right. - 2 - 3 (r) "PARENT" means a "parent corporation", whether now or hereafter existing, as defined in Section 424(e) of the Code, or any successor provision. (s) "PLAN" means this 1997 Stock Plan. (t) "REPORTING PERSON" means an officer, director, or greater than ten percent shareholder of the Company within the meaning of Rule 16a-2 under the Exchange Act, who is required to file reports pursuant to Rule 16a-3 under the Exchange Act. (u) "RESTRICTED STOCK" means shares of Common Stock acquired pursuant to a grant of a Stock Purchase Right under Section 10 below. (v) "RULE 16b-3" means Rule 16b-3 promulgated under the Exchange Act, as the same may be amended from time to time, or any successor provision. (w) "SHARE" means a share of the Common Stock, as adjusted in accordance with Section 12 of the Plan. (x) "STOCK EXCHANGE" means any stock exchange or consolidated stock price reporting system on which prices for the Common Stock are quoted at any given time. (y) "STOCK PURCHASE RIGHT" means the right to purchase Common Stock pursuant to Section 10 below. (z) "SUBSIDIARY" means a "subsidiary corporation," whether now or hereafter existing, as defined in Section 424(f) of the Code, or any successor provision. 3. STOCK SUBJECT TO THE PLAN. Subject to the provisions of Section 12 of the Plan, the maximum aggregate number of Shares that may be optioned and sold under the Plan is 8,402,449 shares of Common Stock. The Shares may be authorized, but unissued, or reacquired Common Stock. If an Option should expire or become unexercisable for any reason without having been exercised in full, the unpurchased Shares that were subject thereto shall, unless the Plan shall have been terminated, become available for future grant under the Plan. In addition, any Shares of Common Stock which are retained by the Company upon exercise of an Option or Stock Purchase Right in order to satisfy the exercise or purchase price for such Option or Stock Purchase Right or any withholding taxes due with respect to such exercise shall be treated as not issued and shall continue to be available under the Plan. Shares repurchased by the Company pursuant to any repurchase right which the Company may have shall not be available for future grant under the Plan. 4. ADMINISTRATION OF THE PLAN. (a) INITIAL PLAN PROCEDURE. Prior to the date, if any, upon which the Company becomes subject to the Exchange Act, the Plan shall be administered by the Board or a committee appointed by the Board. (b) PLAN PROCEDURE AFTER THE DATE, IF ANY, UPON WHICH THE COMPANY BECOMES SUBJECT TO THE EXCHANGE ACT. - 3 - 4 (i) MULTIPLE ADMINISTRATIVE BODIES. If permitted by Rule 16b-3, grants under the Plan may be made by different bodies with respect to directors, non-director officers and Employees or Consultants who are not Reporting Persons. (ii) ADMINISTRATION WITH RESPECT TO REPORTING PERSONS. With respect to grants of Options or Stock Purchase Rights to Employees who are Reporting Persons, such grants shall be made by (A) the Board if the Board may make grants to Reporting Persons under the Plan in compliance with Rule 16b-3, or (B) a committee designated by the Board to make grants to Reporting Persons under the Plan, which committee shall be constituted in such a manner as to permit grants under the Plan to comply with Rule 16b-3. Once appointed, such committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may increase the size of the committee and appoint additional members thereof, remove members (with or without cause) and appoint new members in substitution therefor, fill vacancies, however caused, and remove all members of the committee and thereafter directly make grants to Reporting Persons under the Plan, all to the extent permitted by Rule 16b-3. (iii) ADMINISTRATION WITH RESPECT TO CONSULTANTS AND OTHER Employees. With respect to grants of Options or Stock Purchase Rights to Employees or Consultants who are not Reporting Persons, the Plan shall be administered by (A) the Board or (B) a committee designated by the Board, which committee shall be constituted in such a manner as to satisfy the legal requirements relating to the administration of incentive stock option plans, if any, of California corporate and securities laws, of the Code and of any applicable Stock Exchange (the "Applicable Laws"). Once appointed, such Committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may increase the size of the Committee and appoint additional members thereof, remove members (with or without cause) and appoint new members in substitution therefor, fill vacancies, however caused, and remove all members of the Committee and thereafter directly administer the Plan, all to the extent permitted by the Applicable Laws. (c) POWERS OF THE ADMINISTRATOR. Subject to the provisions of the Plan and in the case of a Committee, the specific duties delegated by the Board to such Committee, and subject to the approval of any relevant authorities, including the approval, if required, of any Stock Exchange, the Administrator shall have the authority, in its discretion: (i) to determine the Fair Market Value of the Common Stock, in accordance with Section 2(k) of the Plan; (ii) to select the Consultants and Employees to whom Options and Stock Purchase Rights may from time to time be granted hereunder; (iii) to determine whether and to what extent Options and Stock Purchase Rights or any combination thereof are granted hereunder; (iv) to determine the number of shares of Common Stock to be covered by each such award granted hereunder; (v) to approve forms of agreement for use under the Plan; - 4 - 5 (vi) to determine the terms and conditions, not inconsistent with the terms of the Plan, of any award granted hereunder; (vii) to determine whether and under what circumstances an Option may be settled in cash under Section 9(f) instead of Common Stock; (viii) to reduce the exercise price of any Option to the then current Fair Market Value if the Fair Market Value of the Common Stock covered by such Option shall have declined since the date the Option was granted; (ix) to determine the terms and restrictions applicable to Stock Purchase Rights and the Restricted Stock purchased by exercising such Stock Purchase Rights; and (x) to construe and interpret the terms of the Plan and awards granted pursuant to the Plan; and (xi) in order to fulfill the purposes of the Plan and without amending the Plan, to modify grants of Options or Stock Purchase Rights to participants who are foreign nationals or employed outside of the United States in order to recognize differences in local law, tax policies or customs. (d) EFFECT OF ADMINISTRATOR'S DECISION. All decisions, determinations and interpretations of the Administrator shall be final and binding on all holders of Options or Stock Purchase Rights. 5. ELIGIBILITY. (a) RECIPIENTS OF GRANTS. Nonstatutory Stock Options and Stock Purchase Rights may be granted to Employees and Consultants. Incentive Stock Options may be granted only to Employees. An Employee or Consultant who has been granted an Option or Stock Purchase Right may, if he or she is otherwise eligible, be granted additional Options or Stock Purchase Rights. (b) TYPE OF OPTION. Each Option shall be designated in the written option agreement as either an Incentive Stock Option or a Nonstatutory Stock Option. However, notwithstanding such designations, to the extent that the aggregate Fair Market Value of Shares with respect to which Options designated as Incentive Stock Options are exercisable for the first time by any Optionee during any calendar year (under all plans of the Company or any Parent, Subsidiary or Affiliate) exceeds $100,000, such excess Options shall be treated as Nonstatutory Stock Options. For purposes of this Section 5(b), Incentive Stock Options shall be taken into account in the order in which they were granted, and the Fair Market Value of the Shares subject to an Incentive Stock Option shall be determined as of the date of the grant of such Option. (c) The Plan shall not confer upon any Optionee any right with respect to continuation of employment or consulting relationship with the Company, nor shall it interfere in any way with such Optionee's right or the Company's right to terminate his or her employment or consulting relationship at any time, with or without cause. - 5 - 6 6. TERM OF PLAN. The Plan shall become effective upon the earlier to occur of its adoption by the Board of Directors or its approval by the shareholders of the Company as described in Section 19 of the Plan. It shall continue in effect for a term of ten (10) years unless sooner terminated under Section 15 of the Plan. 7. TERM OF OPTION. The term of each Option shall be the term stated in the Option Agreement; provided, however, that the term shall be no more than ten (10) years from the date of grant thereof or such shorter term as may be provided in the Option Agreement and provided further that, in the case of an Incentive Stock Option granted to an Optionee who, at the time the Option is granted, owns stock representing more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or any Parent or Subsidiary, the term of the Option shall be five (5) years from the date of grant thereof or such shorter term as may be provided in the written option agreement. 8. OPTION EXERCISE PRICE AND CONSIDERATION. (a) The per share exercise price for the Shares to be issued pursuant to exercise of an Option shall be such price as is determined by the Board and set forth in the applicable agreement, but shall be subject to the following: (i) In the case of an Incentive Stock Option that is: (A) granted to an Employee who, at the time of the grant of such Incentive Stock Option, owns stock representing more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or any Parent or Subsidiary, the per Share exercise price shall be no less than 110% of the Fair Market Value per Share on the date of grant. (B) granted to any other Employee, the per Share exercise price shall be no less than 100% of the Fair Market Value per Share on the date of grant. (ii) In the case of a Nonstatutory Stock Option that is: (A) granted to a person who, at the time of the grant of such Option, owns stock representing more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or any Parent or Subsidiary, the per Share exercise price shall be no less than 110% of the Fair Market Value per Share on the date of the grant. (B) granted to any person, the per Share exercise price shall be no less than 85% of the Fair Market Value per Share on the date of grant. (b) The consideration to be paid for the Shares to be issued upon exercise of an Option, including the method of payment, shall be determined by the Administrator (and, in the case of an Incentive Stock Option, shall be determined at the time of grant) and may consist entirely of (1) cash, (2) check, (3) promissory note, (4) other Shares that (x) in the case of Shares acquired upon exercise of an Option, have been owned by the Optionee for more than six months on the date of surrender or such other period as may be required to avoid a charge to the Company's earnings, and (y) have a Fair Market Value on the date of surrender equal to the - 6 - 7 aggregate exercise price of the Shares as to which such Option shall be exercised, (5) authorization for the Company to retain from the total number of Shares as to which the Option is exercised that number of Shares having a Fair Market Value on the date of exercise equal to the exercise price for the total number of Shares as to which the Option is exercised, (6) delivery of a properly executed exercise notice together with such other documentation as the Administrator and the broker, if applicable, shall require to effect an exercise of the Option and delivery to the Company of the sale or loan proceeds required to pay the exercise price and any applicable income or employment taxes, (7) delivery of an irrevocable subscription agreement for the Shares that irrevocably obligates the option holder to take and pay for the Shares not more than twelve months after the date of delivery of the subscription agreement, (8) any combination of the foregoing methods of payment, or (9) such other consideration and method of payment for the issuance of Shares to the extent permitted under Applicable Laws. In making its determination as to the type of consideration to accept, the Administrator shall consider if acceptance of such consideration may be reasonably expected to benefit the Company. 9. EXERCISE OF OPTION. (a) PROCEDURE FOR EXERCISE; RIGHTS AS A SHAREHOLDER. Any Option granted hereunder shall be exercisable at such times and under such conditions as determined by the Administrator, and reflected in the written option agreement, which may include vesting requirements and/or performance criteria with respect to the Company and/or the Optionee; provided that such Option shall become exercisable at the rate of at least twenty percent (20%) per year over five (5) years from the date the Option is granted. In the event that any of the Shares issued upon exercise of an Option should be subject to a right of repurchase in the Company's favor, such repurchase right shall lapse at the rate of at least twenty percent (20%) per year over five (5) years from the date the Option is granted. An Option may not be exercised for a fraction of a Share. An Option shall be deemed to be exercised when written notice of such exercise has been given to the Company in accordance with the terms of the Option by the person entitled to exercise the Option and the Company has received full payment for the Shares with respect to which the Option is exercised. Full payment may, as authorized by the Board, consist of any consideration and method of payment allowable under Section 8(b) of the Plan. Until the issuance (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company) of the stock certificate evidencing such Shares, no right to vote or receive dividends or any other rights as a shareholder shall exist with respect to the Optioned Stock, not withstanding the exercise of the Option. The Company shall issue (or cause to be issued) such stock certificate promptly upon exercise of the Option. No adjustment will be made for a dividend or other right for which the record date is prior to the date the stock certificate is issued, except as provided in Section 12 of the Plan. Exercise of an Option in any manner shall result in a decrease in the number of Shares that thereafter may be available, both for purposes of the Plan and for sale under the Option, by the number of Shares as to which the Option is exercised. - 7 - 8 (b) TERMINATION OF EMPLOYMENT OR CONSULTING RELATIONSHIP. Subject to Section 9(c), in the event of termination of an Optionee's Continuous Status as an Employee or Consultant with the Company, such Optionee may, but only within three (3) months (or such other period of time not less than thirty (30) days as is determined by the Administrator, with such determination in the case of an Incentive Stock Option being made at the time of grant of the Option and not exceeding three (3) months) after the date of such termination (but in no event later than the expiration date of the term of such Option as set forth in the Option Agreement), exercise his or her Option to the extent that the Optionee was entitled to exercise it at the date of such termination. To the extent that Optionee was not entitled to exercise the Option at the date of such termination, or if Optionee does not exercise such Option to the extent so entitled within the time specified herein, the Option shall terminate. No termination shall be deemed to occur and this Section 9(b) shall not apply if (i) the Optionee is a Consultant who becomes an Employee; or (ii) the Optionee is an Employee who becomes a Consultant. (c) DISABILITY OF OPTIONEE. (i) Notwithstanding Section 9(b) above, in the event of termination of an Optionee's Continuous Status as an Employee or Consultant as a result of his or her total and permanent disability (within the meaning of Section 22(e)(3) of the Code), Optionee may, but only within twelve (12) months from the date of such termination (but in no event later than the expiration date of the term of such Option as set forth in the Option Agreement), exercise the Option to the extent otherwise entitled to exercise it at the date of such termination. To the extent that Optionee was not entitled to exercise the Option at the date of termination, or if Optionee does not exercise such Option to the extent so entitled within the time specified herein, the Option shall terminate. (ii) In the event of termination of an Optionee's Continuous Status as an Employee or Consultant as a result of a disability which does not fall within the meaning of total and permanent disability (as set forth in Section 22(e)(3) of the Code), Optionee may, but only within six (6) months from the date of such termination (but in no event later than the expiration date of the term of such Option as set forth in the Option Agreement), exercise the Option to the extent otherwise entitled to exercise it at the date of such termination. However, to the extent that such Optionee fails to exercise an Option which is an Incentive Stock Option ("ISO") (within the meaning of Section 422 of the Code) within three (3) months of the date of such termination, the Option will not qualify for ISO treatment under the Code. To the extent that Optionee was not entitled to exercise the Option at the date of termination, or if Optionee does not exercise such Option to the extent so entitled within six months (6) from the date of termination, the Option shall terminate. (d) DEATH OF OPTIONEE. In the event of the death of an Optionee during the period of Continuous Status as an Employee or Consultant since the date of grant of the Option, or within thirty (30) days following termination of Optionee's Continuous Status as an Employee or Consultant, the Option may be exercised, at any time within six (6) months following the date of death (but in no event later than the expiration date of the term of such Option as set forth in the Option Agreement), by Optionee's estate or by a person who acquired the right to exercise the Option by bequest or inheritance, but only to the extent of the right to exercise that had accrued at the date of death or, if earlier, the date of termination of Optionee's Continuous Status - 8 - 9 as an Employee or Consultant. To the extent that Optionee was not entitled to exercise the Option at the date of death or termination, as the case may be, or if Optionee does not exercise such Option to the extent so entitled within the time specified herein, the Option shall terminate. (e) RULE 16b-3. Options granted to Reporting Persons shall comply with Rule 16b-3 and shall contain such additional conditions or restrictions as may be required thereunder to qualify for the maximum exemption for Plan transactions. (f) BUYOUT PROVISIONS. The Administrator may at any time offer to buy out for a payment in cash or Shares, an Option previously granted, based on such terms and conditions as the Administrator shall establish and communicate to the Optionee at the time that such offer is made. 10. STOCK PURCHASE RIGHTS. (a) RIGHTS TO PURCHASE. Stock Purchase Rights may be issued either alone, in addition to, or in tandem with other awards granted under the Plan and/or cash awards made outside of the Plan. After the Administrator determines that it will offer Stock Purchase Rights under the Plan, it shall advise the offeree in writing of the terms, conditions and restrictions related to the offer, including the number of Shares that such person shall be entitled to purchase, the price to be paid (which price shall not be less than 85% of the Fair Market Value of the Shares as of the date of the offer, or, in the case of a person owning stock representing more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or any Parent or Subsidiary, the price shall not be less than one hundred percent (100%) of the Fair Market Value of the Shares as of the date of the offer), and the time within which such person must accept such offer, which shall in no event exceed thirty (30) days from the date upon which the Administrator made the determination to grant the Stock Purchase Right. The offer shall be accepted by execution of a Restricted Stock purchase agreement in the form determined by the Administrator. Shares purchased pursuant to the grant of a Stock Purchase Right shall be referred to herein as "Restricted Stock." (b) REPURCHASE OPTION. Unless the Administrator determines otherwise, the Restricted Stock purchase agreement shall grant the Company a repurchase option exercisable upon the voluntary or involuntary termination of the purchaser's employment with the Company for any reason (including death or disability). The purchase price for Shares repurchased pursuant to the Restricted Stock purchase agreement shall be the original purchase price paid by the purchaser and may be paid by cancellation of any indebtedness of the purchaser to the Company. The repurchase option shall lapse at such rate as the Administrator may determine, but at a minimum rate of 20% per year. (c) OTHER PROVISIONS. The Restricted Stock purchase agreement shall contain such other terms, provisions and conditions not inconsistent with the Plan as may be determined by the Administrator in its sole discretion. In addition, the provisions of Restricted Stock purchase agreements need not be the same with respect to each purchaser. (d) RIGHTS AS A SHAREHOLDER. Once the Stock Purchase Right is exercised, the purchaser shall have the rights equivalent to those of a shareholder, and shall be a shareholder - 9 - 10 when his or her purchase is entered upon the records of the duly authorized transfer agent of the Company. No adjustment will be made for a dividend or other right for which the record date is prior to the date the Stock Purchase Right is exercised, except as provided in Section 12 of the Plan. 11. STOCK WITHHOLDING TO SATISFY WITHHOLDING TAX OBLIGATIONS. At the discretion of the Administrator, Optionees may satisfy withholding obligations as provided in this paragraph. When an Optionee incurs tax liability in connection with an Option or Stock Purchase Right, which tax liability is subject to tax withholding under applicable tax laws, and the Optionee is obligated to pay the Company an amount required to be withheld under applicable tax laws, the Optionee may satisfy the withholding tax obligation by one or some combination of the following methods: (a) by cash payment, or (b) out of Optionee's current compensation, (c) if permitted by the Administrator, in its discretion, by surrendering to the Company Shares that (i) in the case of Shares previously acquired from the Company, have been owned by the Optionee for more than six months on the date of surrender, and (ii) have a fair market value on the date of surrender equal to or less than Optionee's marginal tax rate times the ordinary income recognized, or (d) by electing to have the Company withhold from the Shares to be issued upon exercise of the Option, or the Shares to be issued in connection with the Stock Purchase Right, if any, that number of Shares having a fair market value equal to the amount required to be withheld. For this purpose, the fair market value of the Shares to be withheld shall be determined on the date that the amount of tax to be withheld is to be determined (the "Tax Date"). Any surrender by a Reporting Person of previously owned Shares to satisfy tax withholding obligations arising upon exercise of this Option must comply with the applicable provisions of Rule 16b-3. All elections by an Optionee to have Shares withheld to satisfy tax withholding obligations shall be made in writing in a form acceptable to the Administrator and shall be subject to the following restrictions: (a) the election must be made on or prior to the applicable Tax Date; (b) once made, the election shall be irrevocable as to the particular Shares of the Option or Stock Purchase Right as to which the election is made; and (c) all elections shall be subject to the consent or disapproval of the Administrator. In the event the election to have Shares withheld is made by an Optionee and the Tax Date is deferred under Section 83 of the Code because no election is filed under Section 83(b) of the Code, the Optionee shall receive the full number of Shares with respect to which the Option or Stock Purchase Right is exercised but such Optionee shall be unconditionally obligated to tender back to the Company the proper number of Shares on the Tax Date. 12. ADJUSTMENTS UPON CHANGES IN CAPITALIZATION, MERGER OR CERTAIN OTHER TRANSACTIONS. - 10 - 11 (a) CHANGES IN CAPITALIZATION. Subject to any required action by the shareholders of the Company, the number of shares of Common Stock covered by each outstanding Option or Stock Purchase Right, and the number of shares of Common Stock that have been authorized for issuance under the Plan but as to which no Options or Stock Purchase Rights have yet been granted or that have been returned to the Plan upon cancellation or expiration of an Option or Stock Purchase Right, as well as the price per share of Common Stock covered by each such outstanding Option or Stock Purchase Right, shall be proportionately adjusted for any increase or decrease in the number of issued shares of Common Stock resulting from a stock split, reverse stock split, stock dividend, combination, recapitalization or reclassification of the Common Stock, or any other increase or decrease in the number of issued shares of Common Stock effected without receipt of consideration by the Company; provided, however, that conversion of any convertible securities of the Company shall not be deemed to have been "effected without receipt of consideration." Such adjustment shall be made by the Board, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of shares of Common Stock subject to an Option or Stock Purchase Right. (b) DISSOLUTION OR LIQUIDATION. In the event of the proposed dissolution or liquidation of the Company, the Board shall notify the Optionee at least fifteen (15) days prior to such proposed action. To the extent it has not been previously exercised, the Option or Stock Purchase Right will terminate immediately prior to the consummation of such proposed action. (c) MERGER OR SALE OF ASSETS. In the event of a proposed sale of all or substantially all of the Company's assets or a merger of the Company with or into another corporation where the successor corporation issues its securities to the Company's shareholders, each outstanding Option or Stock Purchase Right shall be assumed or an equivalent option or right shall be substituted by such successor corporation or a parent or subsidiary of such successor corporation, unless the successor corporation does not agree to assume the Option or Stock Purchase Right or to substitute an equivalent option or right, in which case such Option or Stock Purchase Right shall terminate upon the consummation of the merger or sale of assets. (d) CERTAIN DISTRIBUTIONS. In the event of any distribution to the Company's shareholders of securities of any other entity or other assets (other than dividends payable in cash or stock of the Company) without receipt of consideration by the Company, the Administrator may, in its discretion, appropriately adjust the price per share of Common Stock covered by each outstanding Option or Stock Purchase Right to reflect the effect of such distribution. 13. NON-TRANSFERABILITY OF OPTIONS AND STOCK PURCHASE RIGHTS. Options and Stock Purchase Rights may not be sold, pledged, assigned, hypothecated, transferred, or disposed of in any manner other than by will or by the laws of descent or distribution and may be exercised or purchased during the lifetime of the Optionee or Stock Purchase Rights Holder only by the Optionee or Stock Purchase Rights Holder. 14. TIME OF GRANTING OPTIONS AND STOCK PURCHASE RIGHTS. The date of grant of an Option or Stock Purchase Right shall, for all purposes, be the date on which the Administrator - 11 - 12 makes the determination granting such Option or Stock Purchase Right, or such other date as is determined by the Board; provided however that in the case of any Incentive Stock Option, the grant date shall be the later of the date on which the Administrator makes the determination granting such Incentive Stock Option or the date of commencement of the Optionee's employment relationship with the Company. Notice of the determination shall be given to each Employee or Consultant to whom an Option or Stock Purchase Right is so granted within a reasonable time after the date of such grant. 15. AMENDMENT AND TERMINATION OF THE PLAN. (a) AUTHORITY TO AMEND OR TERMINATE. The Board may at any time amend, alter, suspend or discontinue the Plan, but no amendment, alteration, suspension or discontinuation shall be made that would impair the rights of any Optionee under any grant theretofore made, without his or her consent. In addition, to the extent necessary and desirable to comply with Rule 16b-3 or with Section 422 of the Code (or any other applicable law or regulation, including the requirements of any Stock Exchange), the Company shall obtain shareholder approval of any Plan amendment in such a manner and to such a degree as required. (b) EFFECT OF AMENDMENT OR TERMINATION. No amendment or termination of the Plan shall adversely affect Options already granted, unless mutually agreed otherwise between the Optionee and the Board, which agreement must be in writing and signed by the Optionee and the Company. 16. CONDITIONS UPON ISSUANCE OF SHARES. Shares shall not be issued pursuant to the exercise of an Option or Stock Purchase Right unless the exercise of such Option or Stock Purchase Right and the issuance and delivery of such Shares pursuant thereto shall comply with all relevant provisions of law, including, without limitation, the Securities Act of 1933, as amended, the Exchange Act, the rules and regulations promulgated thereunder, and the requirements of any Stock Exchange. As a condition to the exercise of an Option, the Company may require the person exercising such Option to represent and warrant at the time of any such exercise that the Shares are being purchased only for investment and without any present intention to sell or distribute such Shares if, in the opinion of counsel for the Company, such a representation is required by law. 17. RESERVATION OF SHARES. The Company, during the term of this Plan, will at all times reserve and keep available such number of Shares as shall be sufficient to satisfy the requirements of the Plan. The inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company's counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell such Shares as to which such requisite authority shall not have been obtained. 18. AGREEMENTS. Options and Stock Purchase Rights shall be evidenced by written agreements in such form as the Administrator shall approve from time to time. 19. SHAREHOLDER APPROVAL. Continuance of the Plan shall be subject to approval by the shareholders of the Company within twelve (12) months before or after the date the Plan is - 12 - 13 adopted. Such shareholder approval shall be obtained in the degree and manner required under applicable state and federal law and the rules of any Stock Exchange upon which the Common Stock is listed. All Options and Stock Purchase Rights issued under the Plan shall become void in the event such approval is not obtained. 20. INFORMATION AND DOCUMENTS TO OPTIONEES AND PURCHASERS. The Company shall provide financial statements at least annually to each Optionee and to each individual who acquired Shares Pursuant to the Plan, during the period such Optionee or purchaser has one or more Options or Stock Purchase Rights outstanding, and in the case of an individual who acquired Shares pursuant to the Plan, during the period such individual owns such Shares. The Company shall not be required to provide such information if the issuance of Options or Stock Purchase Rights under the Plan is limited to key employees whose duties in connection with the Company assure their access to equivalent information. In addition, at the time of issuance of any securities under the Plan, the Company shall provide to the Optionee or the Purchaser a copy of the Plan and a copy of the agreement(s) pursuant to which securities under the Plan are issued. - 13 - 14 PDF SOLUTIONS, INC. 1997 STOCK PLAN NOTICE OF STOCK OPTION GRANT <<Optionee>> You have been granted an option to purchase Common Stock ("Common Stock") of PDF Solutions, Inc. (the "Company") as follows: Board Approval Date: <<BoardApprovDate>> Date of Grant (Later of Board Approval Date or Commencement of Employment/Consulting): <<GrantDate>> Vesting Commencement Date: <<VestingCommenceDate>> Exercise Price Per Share: $<<ExercisePrice>> Total Number of Shares Granted: <<NoofShares>> Total Exercise Price: $<<TotalExercisePrice>> Type of Option: <<Type>> Term/Expiration Date: <<ExpirDate>> Vesting Schedule: <<Vesting>> 15 Termination Period: This Option may be exercised for 60 days after termination of employment or consulting relationship except as set out in Sections 6 and 7 of the Stock Option Agreement (but in no event later than the Expiration Date). By your signature and the signature of the Company's representative below, you and the Company agree that this option is granted under and governed by the terms and conditions of the 1997 Stock Plan and the Stock Option Agreement, both of which are attached and made a part of this document. <<OPTIONEE>>: PDF SOLUTIONS, INC.: - ---------------------------------- By: Signature P. S. Melman, CFO - ---------------------------------- ----------------------------------- Print Name Print Name and Title - ---------------------------------- Address - ---------------------------------- Address - 15 - 16 PDF SOLUTIONS, INC. 1997 STOCK PLAN STOCK OPTION AGREEMENT 1. GRANT OF OPTION. PDF Solutions, Inc., a California corporation (the "Company"), hereby grants to <<Optionee>> ("Optionee") an option (the "Option") to purchase a total number of shares of Common Stock (the "Shares") set forth in the Notice of Stock Option Grant, at the exercise price per share set forth in the Notice of Stock Option Grant (the "Exercise Price") subject to the terms, definitions and provisions of the PDF Solutions, Inc. 1997 Stock Plan (the "Plan") adopted by the Company, which is incorporated herein by reference. Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Option. If designated an Incentive Stock Option, this Option is intended to qualify as an Incentive Stock Option as defined in Section 422 of the Code. 2. EXERCISE OF OPTION. This Option shall be exercisable during its Term in accordance with the Vesting Schedule set out in the Notice of Stock Option Grant and with the provisions of Section 9 of the Plan as follows: (a) RIGHT TO EXERCISE. RIGHT TO EXERCISE. (i) This Option may be early exercised in whole any time after the Date of Grant (the "Early Exercise"), as to Shares which have not yet vested under the vesting schedule indicated on the Notice of Stock Option Grant; provided, however, that Optionee shall execute as a condition to such exercise of this Option, the Early Exercise Notice and Restricted Stock Purchase Agreement attached hereto as Exhibit A (the "Early Exercise Agreement"). If Optionee chooses to exercise this Option solely as to Shares which have vested under the vesting schedule indicated on the Notice of Stock Option Grant, Optionee shall complete and execute the form of Exercise Notice and Restricted Stock Purchase Agreement attached hereto as Exhibit B (the "Exercise Agreement"). Notwithstanding the foregoing, the Company may in its discretion prescribe or accept a different form of notice of exercise and/or stock purchase agreement if such forms are otherwise consistent with this Agreement, the Plan and then-applicable law. (ii) This Option may not be exercised for a fraction of a share. (iii) In the event of Optionee's death, disability or other termination of employment or consulting relationship, the exercisability of the Option is governed by Sections 5, 6 and 7 below, subject to the limitation contained in Section 2(a)(iv) below. (iv) In no event may this Option be exercised after the Expiration Date of this Option as set forth in the Notice of Stock Option Grant. 17 (b) METHOD OF EXERCISE. This Option shall be exercisable by execution and delivery of the Early Exercise Agreement or the Exercise Agreement, whichever is applicable, or of any other written notice approved for such purpose by the Company which shall state the election to exercise the Option, the number of Shares in respect of which the Option is being exercised, and such other representations and agreements as to the holder's investment intent with respect to such shares of Common Stock as may be required by the Company pursuant to the provisions of the Plan. Such written notice shall be signed by Optionee and shall be delivered in person or by certified mail to the Secretary of the Company. The written notice shall be accompanied by payment of the Exercise Price. This Option shall be deemed to be exercised upon receipt by the Company of such written notice accompanied by the Exercise Price. No Shares will be issued pursuant to the exercise of an Option unless such issuance and such exercise shall comply with all relevant provisions of applicable law, including the requirements of any stock exchange upon which the Shares may then be listed. Assuming such compliance, for income tax purposes the Shares shall be considered transferred to Optionee on the date on which the Option is exercised with respect to such Shares. 3. METHOD OF PAYMENT. Payment of the Exercise Price shall be by cash, check, promissory note (either in the form attached as Exhibit C to this agreement or any other form approved by the Company), or any other method permitted under the Plan; provided however that the Administrator may refuse to allow Optionee to tender a particular form of payment (other than cash or check) if, in the Administrator's sole discretion, acceptance of such form of consideration would not be in the best interests of the Company at such time. 4. RESTRICTIONS ON EXERCISE. This Option may not be exercised until such time as the Plan has been approved by the shareholders of the Company, or if the issuance of such Shares upon such exercise or the method of payment of consideration for such shares would constitute a violation of any applicable federal or state securities or other law or regulation, including any rule under Part 207 of Title 12 of the Code of Federal Regulations as promulgated by the Federal Reserve Board. As a condition to the exercise of this Option, the Company may require Optionee to make any representation and warranty to the Company as may be required by any applicable law or regulation. 5. TERMINATION OF RELATIONSHIP. In the event of termination of Optionee's Continuous Status as an Employee or Consultant, Optionee may, to the extent otherwise so entitled at the date of such termination (the "Termination Date"), exercise this Option during the Termination Period set forth in the Notice of Stock Option Grant. To the extent that Optionee was not entitled to exercise this Option at such Termination Date, or if Optionee does not exercise this Option within the Termination Period, the Option shall terminate. 6. DISABILITY OF OPTIONEE. (a) Notwithstanding the provisions of Section 5 above, in the event of termination of Optionee's Continuous Status as an Employee or Consultant as a result of his or her total and permanent disability (as defined in Section 22(e)(3) of the Code), Optionee may, but only within twelve months from the Termination Date (but in no event later than the Expiration Date set forth in the Notice of Stock Option Grant and in Section 9 below), exercise - 2 - 18 this Option to the extent he or she was entitled to exercise it at such Termination Date. To the extent that Optionee was not entitled to exercise the Option on the Termination Date, or if Optionee does not exercise such Option to the extent so entitled within the time specified in this Section 6(a), the Option shall terminate. (b) Notwithstanding the provisions of Section 5 above, in the event of termination of Optionee's consulting relationship or Continuous Status as an Employee as a result of a disability not constituting a total and permanent disability (as set forth in Section 22(e)(3) of the Code), Optionee may, but only within six (6) months from the Termination Date (but in no event later than the Expiration Date set forth in the Notice of Stock Option Grant), exercise the Option to the extent Optionee was entitled to exercise it as of such Termination Date; provided, however, that if this is an Incentive Stock Option and Optionee fails to exercise this Incentive Stock Option within three (3) months from the Termination Date, this Option will cease to qualify as an Incentive Stock Option (as defined in Section 422 of the Code) and Optionee will be treated for federal income tax purposes as having received ordinary income at the time of such exercise in an amount generally measured by the difference between the Exercise Price for the Shares and the Fair Market Value of the Shares on the date of exercise. To the extent that Optionee was not entitled to exercise the Option at the Termination Date, or if Optionee does not exercise such Option to the extent so entitled within the time specified in this Section 6(b), the Option shall terminate. 7. DEATH OF OPTIONEE. In the event of the death of Optionee (a) during the Term of this Option and while an Employee or Consultant of the Company and having been in Continuous Status as an Employee or Consultant since the date of grant of the Option, or (b) within 30 days after Optionee's Termination Date, the Option may be exercised at any time within six months following the date of death (but in no event later than the Expiration Date set forth in the Notice of Stock Option Grant and in Section 9 below), by Optionee's estate or by a person who acquired the right to exercise the Option by bequest or inheritance, but only to the extent of the right to exercise that had accrued at the Termination Date. 8. NON-TRANSFERABILITY OF OPTION. This Option may not be transferred in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Optionee only by him or her. The terms of this Option shall be binding upon the executors, administrators, heirs, successors and assigns of Optionee. 9. TERM OF OPTION. This Option may be exercised only within the Term set forth in the Notice of Stock Option Grant, subject to the limitations set forth in Section 7 of the Plan. 10. TAX CONSEQUENCES. Set forth below is a brief summary as of the date of this Option of certain of the federal and California tax consequences of exercise of this Option and disposition of the Shares under the laws in effect as of the Date of Grant. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES. (a) EXERCISE OF INCENTIVE STOCK OPTION. If this Option qualifies as an Incentive Stock Option, there will be no regular federal or California income tax liability upon - 3 - 19 the exercise of the Option, although the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price will be treated as an adjustment to the alternative minimum tax for federal tax purposes and may subject Optionee to the alternative minimum tax in the year of exercise. (b) EXERCISE OF NONSTATUTORY STOCK OPTION. If this Option does not qualify as an Incentive Stock Option, there may be a regular federal income tax liability and a California income tax liability upon the exercise of the Option. Optionee will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the fair market value of the Shares on the date of exercise over the Exercise Price. If Optionee is an employee, the Company will be required to withhold from Optionee's compensation or collect from Optionee and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income at the time of exercise. (c) DISPOSITION OF SHARES. In the case of a Nonstatutory Stock Option, if Shares are held for more than one year, any gain realized on disposition of the Shares will be treated as long-term capital gain for federal and California income tax purposes. In the case of an Incentive Stock Option, if Shares transferred pursuant to the Option are held for more than one year after exercise and are disposed of at least two years after the Date of Grant, any gain realized on disposition of the Shares will also be treated as long-term capital gain for federal and California income tax purposes. In either case, the long-term capital gain will be taxed for federal income tax and alternative minimum tax purposes at a maximum rate of 20% if the Shares are held more than one year after exercise. If Shares purchased under an Incentive Stock Option are disposed of within one-year after exercise or within two years after the Date of Grant, any gain realized on such disposition will be treated as compensation income (taxable at ordinary income rates) to the extent of the difference between the Exercise Price and the lesser of (i) the Fair Market Value of the Shares on the date of exercise, or (ii) the sale price of the Shares. (d) NOTICE OF DISQUALIFYING DISPOSITION OF INCENTIVE STOCK OPTION SHARES. If the Option granted to Optionee herein is an Incentive Stock Option, and if Optionee sells or otherwise disposes of any of the Shares acquired pursuant to the Incentive Stock Option on or before the later of (i) the date two years after the Date of Grant, or (ii) the date one year after the date of exercise, Optionee shall immediately notify the Company in writing of such disposition. Optionee acknowledges and agrees that he or she may be subject to income tax withholding by the Company on the compensation income recognized by Optionee from the early disposition by payment in cash or out of the current earnings paid to Optionee. 11. WITHHOLDING TAX OBLIGATIONS. (a) GENERAL WITHHOLDING OBLIGATIONS. As a condition to the exercise of Option granted hereunder, Optionee shall make such arrangements as the Administrator may require for the satisfaction of any federal, state, local or foreign withholding tax obligations that may arise in connection with the exercise, receipt or vesting of the Option. The Company shall not be required to issue any Shares under the Plan until such obligations are satisfied. Optionee understands that, upon exercising a Nonstatutory Stock Option, he or she will recognize income for tax purposes in an amount equal to the excess of the then Fair Market Value of the Shares over the Exercise Price. If Optionee is an employee, the Company will be required to withhold - 4 - 20 from Optionee's compensation, or collect from Optionee and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income. Additionally, Optionee may at some point be required to satisfy tax withholding obligations with respect to the disqualifying disposition of an Incentive Stock Option. Optionee shall satisfy his or her tax withholding obligation arising upon the exercise of this Option by one or some combination of the following methods: (i) by cash or check payment, (ii) out of Optionee's current compensation, (iii) if permitted by the Administrator, in its discretion, by surrendering to the Company Shares which (A) in the case of Shares previously acquired from the Company, have been owned by Optionee for more than six months on the date of surrender, and (B) have a Fair Market Value determined as of the applicable Tax Date (as defined in Section 11(c) below) on the date of surrender equal to the amount required to be withheld, or (iv) by electing to have the Company withhold from the Shares to be issued upon exercise of the Option, or the Shares to be issued in connection with the Stock Purchase Right, if any, that number of Shares having a Fair Market Value determined as of the applicable Tax Date equal to the amount required to be withheld. If the Administrator allows the withholding or surrender of Shares to satisfy a Participant's tax withholding obligations, the Administrator shall not allow Shares to be withheld in an amount that exceeds the minimum statutory withholding rates for federal and state tax purposes, including payroll taxes. (b) STOCK WITHHOLDING TO SATISFY WITHHOLDING TAX OBLIGATIONS. In the event the Administrator allows Optionee to satisfy his or her tax withholding obligations as provided in Section 11(a)(iii) or (iv) above, such satisfaction must comply with the requirements of this Section (11)(b) and all applicable laws. All elections by Optionee to have Shares withheld to satisfy tax withholding obligations shall be made in writing in a form acceptable to the Administrator and shall be subject to the following restrictions: (i) the election must be made on or prior to the applicable Tax Date (as defined in Section 11(c) below); (ii) once made, the election shall be irrevocable as to the particular Shares of the Option as to which the election is made; and (iii) all elections shall be subject to the consent or disapproval of the Administrator. In the event the election to have Shares withheld is made by Optionee and the Tax Date is deferred under Section 83 of the Code because no election is filed under Section 83(b) of the Code, Optionee shall receive the full number of Shares with respect to which the Option is exercised but Optionee shall be unconditionally obligated to tender back to the Company the proper number of Shares on the Tax Date. (c) DEFINITIONS. For purposes of this Section 11, the Fair Market Value of the Shares to be withheld shall be determined on the date that the amount of tax to be withheld is to be determined under the applicable laws (the "Tax Date"). 12. MARKET STANDOFF AGREEMENT. In connection with the initial public offering of the Company's securities and upon request of the Company or the underwriters managing such - 5 - 21 underwritten offering of the Company's securities, Optionee agrees not to sell, make any short sale of, loan, grant any option for the purchase of, or otherwise dispose of any securities of the Company (other than those included in the registration) without the prior written consent of the Company or such underwriters, as the case may be, for such period of time (not to exceed 180 days) from the effective date of such registration as may be requested by the Company or such managing underwriters and to execute an agreement reflecting the foregoing as may be requested by the underwriters at the time of the Company's initial public offering. [Signature Page Follows] - 6 - 22 This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one document. PDF Solutions, Inc. By: --------------------------------- Name: P. S. Melman ------------------------------- (print) Title: Chief Financial Officer ------------------------------ OPTIONEE ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO THE OPTION HEREOF IS EARNED ONLY BY CONTINUING CONSULTANCY OR EMPLOYMENT AT THE WILL OF THE COMPANY (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR ACQUIRING SHARES HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT NOTHING IN THIS AGREEMENT, NOR IN THE COMPANY'S STOCK PLAN WHICH IS INCORPORATED HEREIN BY REFERENCE, SHALL CONFER UPON OPTIONEE ANY RIGHT WITH RESPECT TO CONTINUATION OF EMPLOYMENT OR CONSULTANCY BY THE COMPANY, NOR SHALL IT INTERFERE IN ANY WAY WITH OPTIONEE'S RIGHT OR THE COMPANY'S RIGHT TO TERMINATE OPTIONEE'S EMPLOYMENT OR CONSULTANCY AT ANY TIME, WITH OR WITHOUT CAUSE. Optionee acknowledges receipt of a copy of the Plan and represents that he or she is familiar with the terms and provisions thereof, and hereby accepts this Option subject to all of the terms and provisions thereof. Optionee has reviewed the Plan and this Option in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Option and fully understands all provisions of the Option. Optionee hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any questions arising under the Plan or this Option. Dated: --------------------------- ----------------------------------------- <<Optionee>> ----------------------------------------- Address 1 ----------------------------------------- Address 2 - 7 - 23 EXHIBIT A PDF SOLUTIONS, INC. 1997 STOCK PLAN EARLY EXERCISE NOTICE AND RESTRICTED STOCK PURCHASE AGREEMENT This Agreement ("Agreement") is made as of ______________, by and between PDF Solutions, Inc. a California corporation (the "Company"), and <<Optionee>> ("Purchaser"). To the extent any capitalized terms used in this Agreement are not defined, they shall have the meaning ascribed to them in the 1997 Stock Plan. 1. EXERCISE OF OPTION. Subject to the terms and conditions hereof, Purchaser hereby elects to exercise his or her option to purchase ______________ shares of the Common Stock (the "Shares") of the Company under and pursuant to the Company's 1997 Stock Plan (the "Plan") and the Stock Option Agreement dated ______________ (the "Option Agreement"). Of these Shares, Purchaser has elected to purchase _______________ of those Shares which have become vested as of the date hereof under the Vesting Schedule set forth in the Notice of Stock Option Grant (the "Vested Shares") and _____________ Shares which have not yet vested under such Vesting Schedule (the "Unvested Shares"). The purchase price for the Shares shall be $<<ExercisePrice>> per Share for a total purchase price of $_______________. The term "Shares" refers to the purchased Shares and all securities received in replacement of the Shares or as stock dividends or splits, all securities received in replacement of the Shares in a recapitalization, merger, reorganization, exchange or the like, and all new, substituted or additional securities or other properties to which Purchaser is entitled by reason of Purchaser's ownership of the Shares. 2. TIME AND PLACE OF EXERCISE. The purchase and sale of the Shares under this Agreement shall occur at the principal office of the Company simultaneously with the execution and delivery of this Agreement in accordance with the provisions of Section 2(b) of the Option Agreement. On such date, the Company will deliver to Purchaser a certificate representing the Shares to be purchased by Purchaser (which shall be issued in Purchaser's name) against payment of the purchase price therefor by Purchaser by (a) check made payable to the Company, (b) cancellation of indebtedness of the Company to Purchaser, (c) delivery of shares of the Common Stock of the Company in accordance with Section 3 of the Option Agreement, (d) delivery of a promissory note in the form attached as Exhibit C to the Option Agreement (or in any form acceptable to the Company), or (e) a combination of the foregoing. If Purchaser delivers a promissory note as partial or full payment of the purchase price, Purchaser will also deliver a Pledge and Security Agreement in the form attached to Exhibit D to the Option Agreement (or in any form acceptable to the Company). 3. LIMITATIONS ON TRANSFER. In addition to any other limitation on transfer created by applicable securities laws, Purchaser shall not assign, encumber or dispose of any interest in the Shares while the Shares are subject to the Company's Repurchase Option (as defined below). After any Shares have been released from such Repurchase Option, Purchaser shall not assign, - 9 - 24 encumber or dispose of any interest in such Shares except in compliance with the provisions below and applicable securities laws. (a) REPURCHASE OPTION. (i) In the event of the voluntary or involuntary termination of Purchaser's employment or consulting relationship with the Company for any reason (including death or disability), with or without cause, the Company shall upon the date of such termination (the "Termination Date") have an irrevocable, exclusive option (the "Repurchase Option") for a period of 90 days from such date to repurchase all or any portion of the Shares held by Purchaser as of the Termination Date which have not yet been released from the Company's Repurchase Option at the original purchase price per Share specified in Section 1 (adjusted for any stock splits, stock dividends and the like). (ii) Unless the Company notifies Purchaser within 90 days from the date of termination of Purchaser's employment or consulting relationship that it does not intend to exercise its Repurchase Option with respect to some or all of the Shares, the Repurchase Option shall be deemed automatically exercised by the Company as of the 90th day following such termination, provided that the Company may notify Purchaser that it is exercising its Repurchase Option as of a date prior to such 90th day. Unless Purchaser is otherwise notified by the Company pursuant to the preceding sentence that the Company does not intend to exercise its Repurchase Option as to some or all of the Shares to which it applies at the time of termination, execution of this Agreement by Purchaser constitutes written notice to Purchaser of the Company's intention to exercise its Repurchase Option with respect to all Shares to which such Repurchase Option applies. The Company, at its choice, may satisfy its payment obligation to Purchaser with respect to exercise of the Repurchase Option by either (A) delivering a check to Purchaser in the amount of the purchase price for the Shares being repurchased, or (B) in the event Purchaser is indebted to the Company, canceling an amount of such indebtedness equal to the purchase price for the Shares being repurchased, or (C) by a combination of (A) and (B) so that the combined payment and cancellation of indebtedness equals such purchase price. In the event of any deemed automatic exercise of the Repurchase Option pursuant to this Section 3(a)(ii) in which Purchaser is indebted to the Company, such indebtedness equal to the purchase price of the Shares being repurchased shall be deemed automatically canceled as of the 90th day following termination of Purchaser's employment or consulting relationship unless the Company otherwise satisfies its payment obligations. As a result of any repurchase of Shares pursuant to this Section 3(a), the Company shall become the legal and beneficial owner of the Shares being repurchased and shall have all rights and interest therein or related thereto, and the Company shall have the right to transfer to its own name the number of Shares being repurchased by the Company, without further action by Purchaser. (iii) One hundred percent (100%) of the Shares shall initially be subject to the Repurchase Option. The Unvested Shares shall be released from the Repurchase Option in accordance with the Vesting Schedule set forth in the Notice of Stock Option Grant until all Shares are released from the Repurchase Option. Fractional shares shall be rounded to the nearest whole share. - 2 - 25 (b) RIGHT OF FIRST REFUSAL. Before any Shares held by Purchaser or any transferee of Purchaser (either being sometimes referred to herein as the "Holder") may be sold or otherwise transferred (including transfer by gift or operation of law), the Company or its assignee(s) shall have a right of first refusal to purchase the Shares on the terms and conditions set forth in this Section 3(b) (the "Right of First Refusal"). (i) NOTICE OF PROPOSED TRANSFER. The Holder of the Shares shall deliver to the Company a written notice (the "Notice") stating: (i) the Holder's bona fide intention to sell or otherwise transfer such Shares; (ii) the name of each proposed purchaser or other transferee ("Proposed Transferee"); (iii) the number of Shares to be transferred to each Proposed Transferee; and (iv) the terms and conditions of each proposed sale or transfer. The Holder shall offer the Shares at the same price (the "Offered Price") and upon the same terms (or terms as similar as reasonably possible) to the Company or its assignee(s). (ii) EXERCISE OF RIGHT OF FIRST REFUSAL. At any time within thirty 30 days after receipt of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all, but not less than all, of the Shares proposed to be transferred to any one or more of the Proposed Transferees, at the purchase price determined in accordance with subsection (iii) below. (iii) PURCHASE PRICE. The purchase price ("Purchase Price") for the Shares purchased by the Company or its assignee(s) under this Section 3(b) shall be the Offered Price. If the Offered Price includes consideration other than cash, the cash equivalent value of the non-cash consideration shall be determined by the Board of Directors of the Company in good faith. (iv) PAYMENT. Payment of the Purchase Price shall be made, at the option of the Company or its assignee(s), in cash (by check), by cancellation of all or a portion of any outstanding indebtedness of the Holder to the Company (or, in the case of repurchase by an assignee, to the assignee), or by any combination thereof within 30 days after receipt of the Notice or in the manner and at the times set forth in the Notice. (v) HOLDER'S RIGHT TO TRANSFER. If all of the Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section 3(b), then the Holder may sell or otherwise transfer such Shares to that Proposed Transferee at the Offered Price or at a higher price, provided that such sale or other transfer is consummated within 60 days after the date of the Notice and provided further that any such sale or other transfer is effected in accordance with any applicable securities laws and the Proposed Transferee agrees in writing that the provisions of this Section 3 shall continue to apply to the Shares in the hands of such Proposed Transferee. If the Shares described in the Notice are not transferred to the Proposed Transferee within such period, or if the Holder proposes to change the price or other terms to make them more favorable to the Proposed Transferee, a new Notice shall be given to the Company, and the Company and/or its assignees shall again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred. - 3 - 26 (vi) EXCEPTION FOR CERTAIN FAMILY TRANSFERS. Anything to the contrary contained in this Section 3(b) notwithstanding, the transfer of any or all of the Shares during Purchaser's lifetime or on Purchaser's death by will or intestacy to Purchaser's Immediate Family (as defined below) or a trust for the benefit of Purchaser's Immediate Family shall be exempt from the provisions of this Section 3(b). "Immediate Family" as used herein shall mean spouse, lineal descendant or antecedent, father, mother, brother or sister. In such case, the transferee or other recipient shall receive and hold the Shares so transferred subject to the provisions of this Section, and there shall be no further transfer of such Shares except in accordance with the terms of this Section 3. (c) INVOLUNTARY TRANSFER. (i) COMPANY'S RIGHT TO PURCHASE UPON INVOLUNTARY TRANSFER. In the event, at any time after the date of this Agreement, of any transfer by operation of law or other involuntary transfer (including divorce or death, but excluding, in the event of death, a transfer to Immediate Family as set forth in Section 3(b)(vi) above) of all or a portion of the Shares by the record holder thereof, the Company shall have the right to purchase all of the Shares transferred at the greater of the purchase price paid by Purchaser pursuant to this Agreement or the Fair Market Value of the Shares on the date of transfer. Upon such a transfer, the person acquiring the Shares shall promptly notify the Secretary of the Company of such transfer. The right to purchase such Shares shall be provided to the Company for a period of 30 days following receipt by the Company of written notice by the person acquiring the Shares. (ii) PRICE FOR INVOLUNTARY TRANSFER. With respect to any stock to be transferred pursuant to Section 3(c)(i), the price per Share shall be a price set by the Board of Directors of the Company that will reflect the current value of the stock in terms of present earnings and future prospects of the Company. The Company shall notify Purchaser or his or her executor of the price so determined within 30 days after receipt by it of written notice of the transfer or proposed transfer of Shares. However, if the Purchaser does not agree with the valuation as determined by the Board of Directors of the Company, the Purchaser shall be entitled to have the valuation determined by an independent appraiser to be mutually agreed upon by the Company and the Purchaser and whose fees shall be borne equally by the Company and the Purchaser. (d) ASSIGNMENT. The right of the Company to purchase any part of the Shares may be assigned in whole or in part to any shareholder or shareholders of the Company or other persons or organizations. (e) RESTRICTIONS BINDING ON TRANSFEREES. All transferees of Shares or any interest therein will receive and hold such Shares or interest subject to the provisions of this Agreement, including, insofar as applicable, the Repurchase Option. In the event of any purchase by the Company hereunder where the Shares or interest are held by a transferee, the transferee shall be obligated, if requested by the Company, to transfer the Shares or interest to the Purchaser for consideration equal to the amount to be paid by the Company hereunder. In the event the Repurchase Option is deemed exercised by the Company pursuant to Section 3(a)(ii) hereof, the Company may deem any transferee to have transferred the Shares or interest to Purchaser prior to their purchase by the Company, and payment of the purchase price by the - 4 - 27 Company to such transferee shall be deemed to satisfy Purchaser's obligation to pay such transferee for such Shares or interest, and also to satisfy the Company's obligation to pay Purchaser for such Shares or interest. Any sale or transfer of the Shares shall be void unless the provisions of this Agreement are satisfied. (f) TERMINATION OF RIGHTS. The Right of First Refusal and the Company's right to repurchase the Shares in the event of an involuntary transfer pursuant to Section 3(c) above shall terminate upon the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the Securities and Exchange Commission under the Securities Act of 1933, as amended (the "Securities Act"). (g) MARKET STANDOFF AGREEMENT. In connection with the initial public offering of the Company's securities and upon request of the Company or the underwriters managing such underwritten offering of the Company's securities, Purchaser agrees not to sell, make any short sale of, loan, grant any option for the purchase of, or otherwise dispose of any securities of the Company (other than those included in the registration) without the prior written consent of the Company or such underwriters, as the case may be, for such period of time (not to exceed 180 days) from the effective date of such registration as may be requested by the Company or such managing underwriters and to execute an agreement reflecting the foregoing as may be requested by the underwriters at the time of the Company's initial public offering. 4. ESCROW OF UNVESTED SHARES. For purposes of facilitating the enforcement of the provisions of Section 3 above, Purchaser agrees, immediately upon receipt of the certificate(s) for the Shares subject to the Repurchase Option, to deliver such certificate(s), together with an Assignment Separate from Certificate in the form attached to this Agreement as Attachment A executed by Purchaser and by Purchaser's spouse (if required for transfer), in blank, to the Secretary of the Company, or the Secretary's designee, to hold such certificate(s) and Assignment Separate from Certificate in escrow and to take all such actions and to effectuate all such transfers and/or releases as are in accordance with the terms of this Agreement. Purchaser hereby acknowledges that the Secretary of the Company, or the Secretary's designee, is so appointed as the escrow holder with the foregoing authorities as a material inducement to make this Agreement and that said appointment is coupled with an interest and is accordingly irrevocable. Purchaser agrees that said escrow holder shall not be liable to any party hereof (or to any other party). The escrow holder may rely upon any letter, notice or other document executed by any signature purported to be genuine and may resign at any time. Purchaser agrees that if the Secretary of the Company, or the Secretary's designee, resigns as escrow holder for any or no reason, the Board of Directors of the Company shall have the power to appoint a successor to serve as escrow holder pursuant to the terms of this Agreement. 5. INVESTMENT AND TAXATION REPRESENTATIONS. In connection with the purchase of the Shares, Purchaser represents to the Company the following: (a) Purchaser is aware of the Company's business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the Shares. Purchaser is purchasing the Shares for investment for his or her own account only and not with a view to, or for resale in connection with, any - 5 - 28 "distribution" thereof within the meaning of the Securities Act. Purchaser does not have any present intention to transfer the Shares to any other person or entity. (b) Purchaser understands that the Shares have not been registered under the Securities Act by reason of a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of Purchaser's investment intent as expressed herein. (c) Purchaser understands that the Shares are "restricted securities" under applicable U.S. federal and state securities laws and that, pursuant to these laws, Purchaser must hold the Shares indefinitely unless they are registered with the Securities and Exchange Commission and qualified by state authorities, or an exemption from such registration and qualification requirements is available. Purchaser acknowledges that the Company has no obligation to register or qualify the Shares for resale. Purchaser further acknowledges that if an exemption from registration or qualification is available, it may be conditioned on various requirements including, but not limited to, the time and manner of sale, the holding period for the Shares, and requirements relating to the Company which are outside of the Purchaser's control, and which the Company is under no obligation and may not be able to satisfy. (d) Purchaser understands that Purchaser may suffer adverse tax consequences as a result of Purchaser's purchase or disposition of the Shares. Purchaser represents that Purchaser has consulted any tax consultants Purchaser deems advisable in connection with the purchase or disposition of the Shares and that Purchaser is not relying on the Company for any tax advice. 6. RESTRICTIVE LEGENDS AND STOP-TRANSFER ORDERS. (a) LEGENDS. The certificate or certificates representing the Shares shall bear the following legends (as well as any legends required by applicable state and federal corporate and securities laws): (i) THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH SALE OR DISTRIBUTION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933. (ii) THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE COMPANY AND THE SHAREHOLDER, A COPY - 6 - 29 OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. (b) STOP-TRANSFER NOTICES. Purchaser agrees that, in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate "stop transfer" instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records. (c) REFUSAL TO TRANSFER. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares shall have been so transferred. (d) REMOVAL OF LEGEND. When all of the following events have occurred, the Shares then held by Purchaser will no longer be subject to the legend referred to in Section 6(a)(ii): (i) the termination of the Right of First Refusal; (ii) the expiration or termination of the market standoff provisions of Section 3(g) (and of any agreement entered pursuant to Section 3(g)); and (iii) the expiration or exercise in full of the Repurchase Option. After such time, and upon Purchaser's request, a new certificate or certificates representing the Shares not repurchased shall be issued without the legend referred to in Section 6(a)(ii), and delivered to Purchaser. 7. NO EMPLOYMENT RIGHTS. Nothing in this Agreement shall affect in any manner whatsoever the right or power of the Company, or a Parent or Subsidiary of the Company, to terminate Purchaser's employment or consulting relationship, for any reason, with or without cause. 8. SECTION 83(b) ELECTION. Purchaser understands that Section 83(a) of the Internal Revenue Code of 1986, as amended (the "Code"), taxes as ordinary income for a Nonstatutory Stock Option and as alternative minimum taxable income for an Incentive Stock Option the difference between the amount paid for the Shares and the Fair Market Value of the Shares as of the date any restrictions on the Shares lapse. In this context, "restriction" means the right of the Company to buy back the Shares pursuant to the Repurchase Option set forth in Section 3(a) of this Agreement. Purchaser understands that Purchaser may elect to be taxed at the time the Shares are purchased, rather than when and as the Repurchase Option expires, by filing an election under Section 83(b) (an "83(b) Election") of the Code with the Internal Revenue Service within 30 days from the date of purchase. Even if the Fair Market Value of the Shares at the time of the execution of this Agreement equals the amount paid for the Shares, the election must be made to avoid income and alternative minimum tax treatment under Section 83(a) in the future. Purchaser understands that failure to file such an election in a timely manner may result in adverse tax consequences for Purchaser. Purchaser further understands that an additional copy of such election form should be filed with his or her federal income tax return for the calendar year in which the date of this Agreement falls. Purchaser acknowledges that the foregoing is only a summary of the effect of United States federal income taxation with respect to purchase of the Shares hereunder, and does not purport to be complete. Purchaser further acknowledges that the Company has directed Purchaser to seek independent advice regarding the applicable - 7 - 30 provisions of the Code, the income tax laws of any municipality, state or foreign country in which Purchaser may reside, and the tax consequences of Purchaser's death. Purchaser agrees that he or she will execute and deliver to the Company with this executed Agreement a copy of the Acknowledgment and Statement of Decision Regarding Section 83(b) Election (the "Acknowledgment") attached hereto as Attachment B. Purchaser further agrees that he or she will execute and submit with the Acknowledgment a copy of the 83(b) Election attached hereto as Attachment C (for tax purposes in connection with the early exercise of an option) if Purchaser has indicated in the Acknowledgment his or her decision to make such an election. 9. MISCELLANEOUS. (a) GOVERNING LAW. This Agreement and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of California, without giving effect to principles of conflicts of law. (b) ENTIRE AGREEMENT; ENFORCEMENT OF RIGHTS. This Agreement sets forth the entire agreement and understanding of the parties relating to the subject matter herein and merges all prior discussions between them. No modification of or amendment to this Agreement, nor any waiver of any rights under this Agreement, shall be effective unless in writing signed by the parties to this Agreement. The failure by either party to enforce any rights under this Agreement shall not be construed as a waiver of any rights of such party. (c) SEVERABILITY. If one or more provisions of this Agreement are held to be unenforceable under applicable law, the parties agree to renegotiate such provision in good faith. In the event that the parties cannot reach a mutually agreeable and enforceable replacement for such provision, then (i) such provision shall be excluded from this Agreement, (ii) the balance of the Agreement shall be interpreted as if such provision were so excluded and (iii) the balance of the Agreement shall be enforceable in accordance with its terms. (d) CONSTRUCTION. This Agreement is the result of negotiations between and has been reviewed by each of the parties hereto and their respective counsel, if any; accordingly, this Agreement shall be deemed to be the product of all of the parties hereto, and no ambiguity shall be construed in favor of or against any one of the parties hereto. (e) NOTICES. Any notice required or permitted by this Agreement shall be in writing and shall be deemed sufficient when delivered personally or sent by telegram or fax or 48 hours after being deposited in the U.S. mail, as certified or registered mail, with postage prepaid, and addressed to the party to be notified at such party's address as set forth below or as subsequently modified by written notice. (f) COUNTERPARTS. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument. - 8 - 31 (g) SUCCESSORS AND ASSIGNS. The rights and benefits of this Agreement shall inure to the benefit of, and be enforceable by the Company's successors and assigns. The rights and obligations of Purchaser under this Agreement may only be assigned with the prior written consent of the Company. (h) CALIFORNIA CORPORATE SECURITIES LAW. THE SALE OF THE SECURITIES WHICH ARE THE SUBJECT OF THIS AGREEMENT HAS NOT BEEN QUALIFIED WITH THE COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE ISSUANCE OF THE SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE CONSIDERATION THEREFOR PRIOR TO THE QUALIFICATION IS UNLAWFUL, UNLESS THE SALE OF SECURITIES IS EXEMPT FROM QUALIFICATION BY SECTION 25100, 25102 OR 25105 OF THE CALIFORNIA CORPORATIONS CODE. THE RIGHTS OF ALL PARTIES TO THIS AGREEMENT ARE EXPRESSLY CONDITIONED UPON THE QUALIFICATION BEING OBTAINED, UNLESS THE SALE IS SO EXEMPT. [Signature Page Follows] - 9 - 32 The parties have executed this Agreement as of the date first set forth above. COMPANY: PDF SOLUTIONS, Inc. By: ------------------------------------- Name: ----------------------------------- (print) Title: ---------------------------------- PURCHASER: <<Optionee>> --------------------------------------- (Signature) --------------------------------------- (Print Name) Address: -------------------------------- -------------------------------- I, ______________________, spouse of <<Optionee>>, have read and hereby approve the foregoing Agreement. In consideration of the Company's granting my spouse the right to purchase the Shares as set forth in the Agreement, I hereby agree to be bound irrevocably by the Agreement and further agree that any community property or similar interest that I may have in the Shares shall hereby be similarly bound by the Agreement. I hereby appoint my spouse as my attorney-in-fact with respect to any amendment or exercise of any rights under the Agreement. ------------------------------------ Spouse of <<Optionee>> - 10 - 33 ATTACHMENT A ASSIGNMENT SEPARATE FROM CERTIFICATE FOR VALUE RECEIVED and pursuant to that certain Early Exercise Notice and Restricted Stock Purchase Agreement between the undersigned ("Purchaser") and PDF Solutions, Inc. (the "Company") dated _______________, ____ (the "Agreement"), Purchaser hereby sells, assigns and transfers unto the Company _________________________________ (________) shares of the Common Stock of the Company, standing in Purchaser's name on the books of the Company and represented by Certificate No. ____, and does hereby irrevocably constitute and appoint ________________________________________________ to transfer said stock on the books of the Company with full power of substitution in the premises. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND THE ATTACHMENTS THERETO. Dated: ____________, 20__. Signature: ------------------------------------ <<Optionee>> ------------------------------------ Spouse of <<Optionee>> (if applicable) Instruction: Please do not fill in any blanks other than the signature line. The purpose of this assignment is to enable the Company to exercise its Repurchase Option set forth in the Agreement without requiring additional signatures on the part of Purchaser. 34 ATTACHMENT B ACKNOWLEDGMENT AND STATEMENT OF DECISION REGARDING SECTION 83(b) ELECTION The undersigned (which term includes the undersigned's spouse), a purchaser of ___________ shares of Common Stock of PDF Solutions, Inc., a California corporation (the "Company") by exercise of an option (the "Option") granted pursuant to the Company's 1997 Stock Plan (the "Plan"), hereby states as follows: 1. The undersigned acknowledges receipt of a copy of the Plan relating to the offering of such shares. The undersigned has carefully reviewed the Plan and the option agreement pursuant to which the Option was granted. 2. The undersigned either [check and complete as applicable]: (a)____ has consulted, and has been fully advised by, the undersigned's own tax advisor, _________________________, whose business address is ______________________________, regarding the federal, state and local tax consequences of purchasing shares under the Plan, and particularly regarding the advisability of making elections pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended (the "Code") and pursuant to the corresponding provisions, if any, of applicable state law; or (b)____ has knowingly chosen not to consult such a tax advisor. 3. The undersigned hereby states that the undersigned has decided [check as applicable]: (a)____ to make an election pursuant to Section 83(b) of the Code, and is submitting to the Company, together with the undersigned's executed Early Exercise Notice and Restricted Stock Purchase Agreement, an executed form entitled "Election Under Section 83(b) of the Internal Revenue Code of 1986;" or (b)____ not to make an election pursuant to Section 83(b) of the Code. 35 4. Neither the Company nor any subsidiary or representative of the Company has made any warranty or representation to the undersigned with respect to the tax consequences of the undersigned's purchase of shares under the Plan or of the making or failure to make an election pursuant to Section 83(b) of the Code or the corresponding provisions, if any, of applicable state law. Date: - ----------------------------------- ----------------------------------- <<Optionee>> Date: - ----------------------------------- ----------------------------------- Spouse of <<Optionee>> - 2 - 36 ATTACHMENT C ELECTION UNDER SECTION 83(b) OF THE INTERNAL REVENUE CODE OF 1986 The undersigned taxpayer hereby elects, pursuant to Section 83(b) of the Internal Revenue Code, to include in taxpayer's gross income or alternative minimum taxable income, as applicable, for the current taxable year, the amount of any income that may be taxable to taxpayer in connection with taxpayer's receipt of the property described below: 1. The name, address, taxpayer identification number and taxable year of the undersigned are as follows: NAME OF TAXPAYER: <<Optionee>> NAME OF SPOUSE: ----------------------------------- ADDRESS: ------------------------------------------------- ------------------------------------------------- IDENTIFICATION NO. OF TAXPAYER: ---------------- IDENTIFICATION NO. OF SPOUSE: ---------------- TAXABLE YEAR: ---------------- 2. The property with respect to which the election is made is described as follows: ______________ shares of the Common Stock of PDF Solutions, Inc., a California corporation (the "Company"). 3. The date on which the property was transferred is: -------------- 4. The property is subject to the following restrictions: Repurchase option at cost in favor of the Company upon termination of taxpayer's employment or consulting relationship. 5. The fair market value at the time of transfer, determined without regard to any restriction other than a restriction which by its terms will never lapse, of such property is: $ -------------- 6. The amount (if any) paid for such property: $ --------------- The undersigned has submitted a copy of this statement to the person for whom the services were performed in connection with the undersigned's receipt of the above-described property. The transferee of such property is the person performing the services in connection with the transfer of said property. The undersigned understands that the foregoing election may not be revoked except with the consent of the Commissioner. Date: - ----------------------------------- ----------------------------------- <<Optionee>> Date: - ----------------------------------- ----------------------------------- Spouse of <<Optionee>> 37 RECEIPT AND CONSENT The undersigned hereby acknowledges receipt of a photocopy of Certificate No. ______ for ________ shares of Common Stock of PDF Solutions, Inc. (the "Company"). The undersigned further acknowledges that the Secretary of the Company, or his or her designee, is acting as escrow holder pursuant to the Early Exercise Notice and Restricted Stock Purchase Agreement Purchaser has previously entered into with the Company. As escrow holder, the Secretary of the Company, or his or her designee, holds the original of the aforementioned certificate issued in the undersigned's name. Date: - ----------------------------------- ----------------------------------- <<Optionee>> 38 EXHIBIT B PDF SOLUTIONS, INC. 1997 STOCK PLAN EXERCISE NOTICE AND RESTRICTED STOCK PURCHASE AGREEMENT This Agreement ("Agreement") is made as of ______________, by and between PDF Solutions, Inc., a California corporation (the "Company"), and <<Optionee>> ("Purchaser"). To the extent any capitalized terms used in this Agreement are not defined, they shall have the meaning ascribed to them in the 1997 Stock Plan. 1. EXERCISE OF OPTION. Subject to the terms and conditions hereof, Purchaser hereby elects to exercise his or her option to purchase ______________ shares of the Common Stock (the "Shares") of the Company under and pursuant to the Company's 1997 Stock Plan (the "Plan") and the Stock Option Agreement dated ______________ (the "Option Agreement"). The purchase price for the Shares shall be $<<ExercisePrice>> per Share for a total purchase price of $_______________. The term "Shares" refers to the purchased Shares and all securities received in replacement of the Shares or as stock dividends or splits, all securities received in replacement of the Shares in a recapitalization, merger, reorganization, exchange or the like, and all new, substituted or additional securities or other properties to which Purchaser is entitled by reason of Purchaser's ownership of the Shares. 2. TIME AND PLACE OF EXERCISE. The purchase and sale of the Shares under this Agreement shall occur at the principal office of the Company simultaneously with the execution and delivery of this Agreement in accordance with the provisions of Section 2(b) of the Option Agreement. On such date, the Company will deliver to Purchaser a certificate representing the Shares to be purchased by Purchaser (which shall be issued in Purchaser's name) against payment of the purchase price therefor by Purchaser by (a) check made payable to the Company, (b) cancellation of indebtedness of the Company to Purchaser, (c) delivery of shares of the Common Stock of the Company in accordance with Section 3 of the Option Agreement, (d) delivery of a promissory note in the form attached as Exhibit C to the Option Agreement (or in any form acceptable to the Company), or (e) a combination of the foregoing. If Purchaser delivers a promissory note as partial or full payment of the purchase price, Purchaser will also deliver a Pledge and Security Agreement in the form attached as Exhibit D to the Option Agreement (or in any form acceptable to the Company). 3. LIMITATIONS ON TRANSFER. In addition to any other limitation on transfer created by applicable securities laws, Purchaser shall not assign, encumber or dispose of any interest in the Shares except in compliance with the provisions below and applicable securities laws. - 2 - 39 (a) RIGHT OF FIRST REFUSAL. Before any Shares held by Purchaser or any transferee of Purchaser (either being sometimes referred to herein as the "Holder") may be sold or otherwise transferred (including transfer by gift or operation of law), the Company or its assignee(s) shall have a right of first refusal to purchase the Shares on the terms and conditions set forth in this Section 3(a) (the "Right of First Refusal"). (i) NOTICE OF PROPOSED TRANSFER. The Holder of the Shares shall deliver to the Company a written notice (the "Notice") stating: (i) the Holder's bona fide intention to sell or otherwise transfer such Shares; (ii) the name of each proposed purchaser or other transferee ("Proposed Transferee"); (iii) the number of Shares to be transferred to each Proposed Transferee; and (iv) the terms and conditions of each proposed sale or transfer. The Holder shall offer the Shares at the same price (the "Offered Price") and upon the same terms (or terms as similar as reasonably possible) to the Company or its assignee(s). (ii) EXERCISE OF RIGHT OF FIRST REFUSAL. At any time within 30 days after receipt of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all, but not less than all, of the Shares proposed to be transferred to any one or more of the Proposed Transferees, at the purchase price determined in accordance with subsection (iii) below. (iii) PURCHASE PRICE. The purchase price ("Purchase Price") for the Shares purchased by the Company or its assignee(s) under this Section 3(b) shall be the Offered Price. If the Offered Price includes consideration other than cash, the cash equivalent value of the non-cash consideration shall be determined by the Board of Directors of the Company in good faith. (iv) PAYMENT. Payment of the Purchase Price shall be made, at the option of the Company or its assignee(s), in cash (by check), by cancellation of all or a portion of any outstanding indebtedness of the Holder to the Company (or, in the case of repurchase by an assignee, to the assignee), or by any combination thereof within 30 days after receipt of the Notice or in the manner and at the times set forth in the Notice. (v) HOLDER'S RIGHT TO TRANSFER. If all of the Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section 3(b), then the Holder may sell or otherwise transfer such Shares to that Proposed Transferee at the Offered Price or at a higher price, provided that such sale or other transfer is consummated within 60 days after the date of the Notice and provided further that any such sale or other transfer is effected in accordance with any applicable securities laws and the Proposed Transferee agrees in writing that the provisions of this Section 3 shall continue to apply to the Shares in the hands of such Proposed Transferee. If the Shares described in the Notice are not transferred to the Proposed Transferee within such period, or if the Holder proposes to change the price or other terms to make them more favorable to the Proposed Transferee, a new Notice shall be given to the Company, and the Company and/or its assignees shall again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred. - 3 - 40 (vi) EXCEPTION FOR CERTAIN FAMILY TRANSFERS. Anything to the contrary contained in this Section 3(b) notwithstanding, the transfer of any or all of the Shares during Purchaser's lifetime or on Purchaser's death by will or intestacy to Purchaser's Immediate Family (as defined below) or a trust for the benefit of Purchaser's Immediate Family shall be exempt from the provisions of this Section 3(b). "Immediate Family" as used herein shall mean spouse, lineal descendant or antecedent, father, mother, brother or sister. In such case, the transferee or other recipient shall receive and hold the Shares so transferred subject to the provisions of this Section, and there shall be no further transfer of such Shares except in accordance with the terms of this Section 3. (b) INVOLUNTARY TRANSFER. (i) COMPANY'S RIGHT TO PURCHASE UPON INVOLUNTARY TRANSFER. In the event, at any time after the date of this Agreement, of any transfer by operation of law or other involuntary transfer (including divorce or death, but excluding, in the event of death, a transfer to Immediate Family as set forth in Section 3(b)(vi) above) of all or a portion of the Shares by the record holder thereof, the Company shall have the right to purchase all of the Shares transferred at the greater of the purchase price paid by Purchaser pursuant to this Agreement or the Fair Market Value of the Shares on the date of transfer. Upon such a transfer, the person acquiring the Shares shall promptly notify the Secretary of the Company of such transfer. The right to purchase such Shares shall be provided to the Company for a period of 30 days following receipt by the Company of written notice by the person acquiring the Shares. (ii) PRICE FOR INVOLUNTARY TRANSFER. With respect to any stock to be transferred pursuant to Section 3(c)(i), the price per Share shall be a price set by the Board of Directors of the Company that will reflect the current value of the stock in terms of present earnings and future prospects of the Company. The Company shall notify Purchaser or his or her executor of the price so determined within 30 days after receipt by it of written notice of the transfer or proposed transfer of Shares. However, if the Purchaser does not agree with the valuation as determined by the Board of Directors of the Company, the Purchaser shall be entitled to have the valuation determined by an independent appraiser to be mutually agreed upon by the Company and the Purchaser and whose fees shall be borne equally by the Company and the Purchaser. (c) ASSIGNMENT. The right of the Company to purchase any part of the Shares may be assigned in whole or in part to any shareholder or shareholders of the Company or other persons or organizations; provided, however, that an assignee, other than a corporation that is the parent or a 100% owned subsidiary of the Company, must pay the Company, upon assignment of such right, cash equal to the difference between the original purchase price and fair market value, if the original purchase price is less than the fair market value of the Shares subject to the assignment. (d) RESTRICTIONS BINDING ON TRANSFEREES. All transferees of Shares or any interest therein will receive and hold such Shares or interest subject to the provisions of this Agreement, including, insofar as applicable, the Repurchase Option. Any sale or transfer of the Shares shall be void unless the provisions of this Agreement are satisfied. - 4 - 41 (e) TERMINATION OF RIGHTS. The Right of First Refusal granted the Company by Section 3(a) above and the option to repurchase the Shares in the event of an involuntary transfer granted the Company by Section 3(b) above shall terminate upon the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the Securities and Exchange Commission under the Securities Act of 1933, as amended (the "Securities Act"). Upon termination of the Right of First Refusal described in Section 3(a) above, a new certificate or certificates representing the Shares not repurchased shall be issued, on request, without the legend referred to in Section 6(a)(ii) herein and delivered to Purchaser. 4. INVESTMENT AND TAXATION REPRESENTATIONS. In connection with the purchase of the Shares, Purchaser represents to the Company the following: (a) Purchaser is aware of the Company's business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the Shares. Purchaser is purchasing the Shares for investment for his or her own account only and not with a view to, or for resale in connection with, any "distribution" thereof within the meaning of the Securities Act. (b) Purchaser understands that the Shares have not been registered under the Securities Act by reason of a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of Purchaser's investment intent as expressed herein. (c) Purchaser understands that the Shares are "restricted securities" under applicable U.S. federal and state securities laws and that, pursuant to these laws, Purchaser must hold the Shares indefinitely unless they are registered with the Securities and Exchange Commission and qualified by state authorities, or an exemption from such registration and qualification requirements is available. Purchaser acknowledges that the Company has no obligation to register or qualify the Shares for resale. Purchaser further acknowledges that if an exemption from registration or qualification is available, it may be conditioned on various requirements including, but not limited to, the time and manner of sale, the holding period for the Shares, and requirements relating to the Company which are outside of the Purchaser's control, and which the Company is under no obligation and may not be able to satisfy. (d) Purchaser understands that Purchaser may suffer adverse tax consequences as a result of Purchaser's purchase or disposition of the Shares. Purchaser represents that Purchaser has consulted any tax consultants Purchaser deems advisable in connection with the purchase or disposition of the Shares and that Purchaser is not relying on the Company for any tax advice. 5 RESTRICTIVE LEGENDS AND STOP-TRANSFER ORDERS. (a) LEGENDS. The certificate or certificates representing the Shares shall bear the following legends (as well as any legends required by applicable state and federal corporate and securities laws): (i) THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE - 5 - 42 SECURITIES ACT OF 1933, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH SALE OR DISTRIBUTION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933. (ii) THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE COMPANY AND THE STOCKHOLDER, A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. (b) STOP-TRANSFER NOTICES. Purchaser agrees that, in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate "stop transfer" instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records. (c) REFUSAL TO TRANSFER. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares shall have been so transferred. 6. NO EMPLOYMENT RIGHTS. Nothing in this Agreement shall affect in any manner whatsoever the right or power of the Company, or a Parent or Subsidiary of the Company, to terminate Purchaser's employment or consulting relationship, for any reason, with or without cause. 7. MARKET STANDOFF AGREEMENT. In connection with the initial public offering of the Company's securities and upon request of the Company or the underwriters managing such underwritten offering of the Company's securities, Purchaser agrees not to sell, make any short sale of, loan, grant any option for the purchase of, or otherwise dispose of any securities of the Company (other than those included in the registration) without the prior written consent of the Company or such underwriters, as the case may be, for such period of time (not to exceed 180 days) from the effective date of such registration as may be requested by the Company or such managing underwriters and to execute an agreement reflecting the foregoing as may be requested by the underwriters at the time of the Company's initial public offering. - 6 - 43 8. MISCELLANEOUS. (a) GOVERNING LAW. This Agreement and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of California, without giving effect to principles of conflicts of law. (b) ENTIRE AGREEMENT; ENFORCEMENT OF RIGHTS. This Agreement sets forth the entire agreement and understanding of the parties relating to the subject matter herein and merges all prior discussions between them. No modification of or amendment to this Agreement, nor any waiver of any rights under this Agreement, shall be effective unless in writing signed by the parties to this Agreement. The failure by either party to enforce any rights under this Agreement shall not be construed as a waiver of any rights of such party. (c) SEVERABILITY. If one or more provisions of this Agreement are held to be unenforceable under applicable law, the parties agree to renegotiate such provision in good faith. In the event that the parties cannot reach a mutually agreeable and enforceable replacement for such provision, then (i) such provision shall be excluded from this Agreement, (ii) the balance of the Agreement shall be interpreted as if such provision were so excluded and (iii) the balance of the Agreement shall be enforceable in accordance with its terms. (d) CONSTRUCTION. This Agreement is the result of negotiations between and has been reviewed by each of the parties hereto and their respective counsel, if any; accordingly, this Agreement shall be deemed to be the product of all of the parties hereto, and no ambiguity shall be construed in favor of or against any one of the parties hereto. (e) NOTICES. Any notice required or permitted by this Agreement shall be in writing and shall be deemed sufficient when delivered personally or sent by telegram or fax or 48 hours after being deposited in the U.S. mail, as certified or registered mail, with postage prepaid, and addressed to the party to be notified at such party's address as set forth below or as subsequently modified by written notice. (f) COUNTERPARTS. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument. (g) SUCCESSORS AND ASSIGNS. The rights and benefits of this Agreement shall inure to the benefit of, and be enforceable by the Company's successors and assigns. The rights and obligations of Purchaser under this Agreement may only be assigned with the prior written consent of the Company. - 7 - 44 The parties have executed this Agreement as of the date first set forth above. COMPANY: PDF SOLUTIONS, INC. By: ------------------------------------- Name: ----------------------------------- (print) Title: ---------------------------------- Address: -------------------------------- -------------------------------- PURCHASER: <<Optionee>> --------------------------------------- (Signature) --------------------------------------- (Print Name) Address: -------------------------------- -------------------------------- I, ______________________, spouse of <<Optionee>>, have read and hereby approve the foregoing Agreement. In consideration of the Company's granting my spouse the right to purchase the Shares as set forth in the Agreement, I hereby agree to be bound irrevocably by the Agreement and further agree that any community property or similar interest that I may have in the Shares shall hereby be similarly bound by the Agreement. I hereby appoint my spouse as my attorney-in-fact with respect to any amendment or exercise of any rights under the Agreement. ------------------------------------ Spouse of <<Optionee>> - 8 - 45 EXHIBIT C PROMISSORY NOTE $__________ San Jose, California _______________, 2000 For value received, the undersigned promises to pay PDF Solutions, Inc., a California corporation (the "Company"), at its principal office the principal sum of $__________ with interest from the date hereof at a rate of _____% per annum, compounded annually, on the unpaid balance of such principal sum. Such accrued interest shall be due and payable on each annual interest compounding date, and such principal shall be due and payable on ______________________. If the undersigned's employment or consulting relationship with the Company is terminated prior to payment in full of this Note, this Note shall be immediately due and payable. Principal and interest are payable in lawful money of the United States of America. AMOUNTS DUE UNDER THIS NOTE MAY BE PREPAID AT ANY TIME WITHOUT INTEREST OR PENALTY. Should suit be commenced to collect any sums due under this Note, such sum as the Court may deem reasonable shall be added hereto as attorneys' fees. The makers and endorsers have severally waived presentment for payment, protest, notice of protest and notice of nonpayment of this Note. This Note, which is full recourse, is secured by a pledge of certain shares of Common Stock of the Company and is subject to the terms of a Pledge and Security Agreement between the undersigned and the Company of even date herewith. ____________________________________ <<Optionee>> 46 EXHIBIT D PLEDGE AND SECURITY AGREEMENT This Pledge and Security Agreement (the "Agreement") is entered into this _____ day of ____________ by and between PDF Solutions, Inc., a California corporation (the "Company") and <<Optionee>> ("Purchaser"). RECITALS In connection with Purchaser's exercise of an option to purchase certain shares of the Company's Common Stock (the "Shares") pursuant to an Option Agreement dated __________ between Purchaser and the Company, Purchaser is delivering a promissory note of even date herewith (the "Note") in full or partial payment of the exercise price for the Shares. The company requires that the Note be secured by a pledge of the Shares or the terms set forth below. AGREEMENT In consideration of the Company's acceptance of the Note as full or partial payment of the exercise price of the Shares, and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto agree as follows: 1. The Note shall become payable in full upon the voluntary or involuntary termination or cessation of employment of Purchaser with the Company, for any reason, with or without cause (including death or disability). 2. Purchaser shall deliver to the Secretary of the Company, or his or her designee (hereinafter referred to as the "Pledge Holder"), all certificates representing the Shares, together with an Assignment Separate from Certificate in the form attached to this Agreement as Attachment A executed by Purchaser and by Purchaser's spouse (if required for transfer), in blank, for use in transferring all or a portion of the Shares to the Company if, as and when required pursuant to this Agreement. In addition, if Purchaser is married, Purchaser's spouse shall execute the signature page attached to this Agreement. 3. As security for the payment of the Note and any renewal, extension or modification of the Note, Purchaser hereby grants to the Company a security interest in and pledges with and delivers to the Company Purchaser's Shares (sometimes referred to herein as the "Collateral"). 4. In the event that Purchaser prepays all or a portion of the Note, in accordance with the provisions thereof, Purchaser intends, unless written notice to the contrary is delivered to the Pledge Holder, that the Shares represented by the portion of the Note so repaid, including annual interest thereon, shall continue to be so held by the Pledge Holder, to serve as independent collateral for the outstanding portion of the Note for the purpose of commencing the holding period set forth in Rule 144(d) promulgated under the Securities Act of 1933, as amended (the "Securities Act"). 47 5. In the event of any foreclosure of the security interest created by this Agreement, the Company may sell the Shares at a private sale or may repurchase the Shares itself. The parties agree that, prior to the establishment of a public market for the Shares of the Company, the securities laws affecting sale of the Shares make a public sale of the Shares commercially unreasonable. The parties further agree that the repurchasing of such Shares by the Company, or by any person to whom the Company may have assigned its rights under this Agreement, is commercially reasonable if made at a price determined by the Board of Directors in its discretion, fairly exercised, representing what would be the fair market value of the Shares reduced by any limitation on transferability, whether due to the size of the block of shares or the restrictions of applicable securities laws. 6. In the event of default in payment when due of any indebtedness under the Note, the Company may elect then, or at any time thereafter, to exercise all rights available to a secured party under the California Commercial Code including the right to sell the Collateral at a private or public sale or repurchase the Shares as provided above. The proceeds of any sale shall be applied in the following order: (a) To the extent necessary, proceeds shall be used to pay all reasonable expenses of the Company in enforcing this Agreement and the Note, including, without limitation, reasonable attorney's fees and legal expenses incurred by the Company. (b) To the extent necessary, proceeds shall be used to satisfy any remaining indebtedness under Purchaser's Note. (c) Any remaining proceeds shall be delivered to Purchaser. 7. Upon full payment by Purchaser of all amounts due under the Note, Pledge Holder shall deliver to Purchaser all Shares in Pledge Holder's possession belonging to Purchaser, and Pledge Holder shall thereupon be discharged of all further obligations under this Agreement; provided, however, that Pledge Holder shall nevertheless retain the Shares as escrow agent if at the time of full payment by Purchaser said Shares are still subject to a Repurchase Option in favor of the Company. - 2 - 48 The parties have executed this Pledge and Security Agreement as of the date first set forth above. COMPANY: PDF SOLUTIONS, Inc. By: ------------------------------------- Name: ----------------------------------- (print) Title: ---------------------------------- PURCHASER: <<Optionee>> --------------------------------------- (Signature) --------------------------------------- (Print Name) Address: -------------------------------- -------------------------------- - 3 - 49 ATTACHMENT A ASSIGNMENT SEPARATE FROM CERTIFICATE FOR VALUE RECEIVED and pursuant to that certain Pledge and Security Agreement between the undersigned ("Purchaser") and PDF Solutions, Inc., dated _____________, (the "Agreement"), Purchaser hereby sells, assigns and transfers unto _______________________________ (________) shares of the Common Stock of PDF Solutions, Inc., standing in Purchaser's name on the books of said corporation represented by Certificate No. ___ herewith and hereby irrevocably appoints _____________________________ to transfer said stock on the books of the within-named corporation with full power of substitution in the premises. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT. Dated: ____________ Signature: ______________________________________ <<Optionee>> ______________________________________ Spouse of <<Optionee>> (if applicable) Instruction: Please do not fill in any blanks other than the signature line. The purpose of this assignment is to perfect the security interest of the Company pursuant to the Agreement. - 5 - 50 RECEIPT The undersigned hereby acknowledges receipt of Certificate No. _____ for __________ shares of Common Stock of PDF Solutions, Inc. Dated: _______________ ____________________________________ <<Optionee>> 51 RECEIPT AND CONSENT The undersigned hereby acknowledges receipt of a photocopy Certificate No. _____ purchaser for __________ shares of Common Stock of PDF Solutions, Inc. (the "Company"). The undersigned further acknowledges that the Secretary of the Company, or his or her designee, is acting as Pledge Holder pursuant to the Pledge and Security Agreement Purchaser has previously entered into with the Company. As Pledge Holder, the Secretary of the Company, or his or her designee, holds the original of the aforementioned certificate issued in the undersigned's name. Dated: _______________ ____________________________________ <<Optionee>> 52 RECEIPT PDF Solutions, Inc. (the "Company") hereby acknowledges receipt of a check in the amount of $____________ given by <<Optionee>> as consideration for Certificate No. _________ for __________ shares of Common Stock of PDF Solutions, Inc. Dated: ____________ PDF Solutions, Inc. By:_____________________________________ Name:___________________________________ (print) Title:__________________________________ - 2 - 53 PDF SOLUTIONS, INC. NOTICE OF GRANT OF STOCK PURCHASE RIGHTS <<Optionee>> You have been granted an option to purchase Common Stock ("Common Stock") of PDF Solutions, Inc. (the "Company") as follows: Board Approval Date: <<BoardApprovDate>> Vesting Commencement Date: <<VestingCommenceDate>> Exercise Price Per Share: $<<ExercisePrice>> Total No. Purchase Rights Granted: <<NoofShares>> Total Purchase Price: $<<TotalExercisePrice>> Vesting Schedule: <<Vesting>> Termination Period: This Option may be exercised for 60 days after termination of employment or consulting relationship. 54 By your signature and the signature of the Company's representative below, you and the Company agree that this option is granted under and governed by the terms and conditions of the Restricted Stock Purchase Agreement, which is attached and made a part of this document. <<OPTIONEE>>: PDF SOLUTIONS, INC.: By: - ----------------------------------- ----------------------------------- Signature P. S. Melman, CFO - ----------------------------------- ----------------------------------- Print Name Print Name and Title - ----------------------------------- Address - ----------------------------------- Address - 4 - 55 PDF SOLUTIONS, INC. RESTRICTED STOCK PURCHASE AGREEMENT 1997 STOCK PLAN This Restricted Stock Purchase Agreement (the "Agreement") is made as of __________, 2000 by and between PDF Solutions, Inc., a California corporation (the "Company"), and <<Optionee>> ("Purchaser") pursuant to the Company's 1997 Stock Plan. To the extent any capitalized terms used in this Agreement are not defined, they shall have the meaning ascribed to them in the 1997 Stock Plan. 1. SALE OF STOCK. Subject to the terms and conditions of this Agreement, on the Purchase Date (as defined below) the Company will issue and sell to Purchaser, and Purchaser agrees to purchase from the Company, <<NoofShares>> shares of the Company's Common Stock (the "Shares") at a purchase price of $<<ExercisePrice>> per Share for a total purchase price of $<<TotalExercisePrice>>. The per share purchase price of the Shares shall be not less than 85% of the Fair Market Value of the Shares as of the date of offer of the Shares to Purchaser, or, in the case of any person owning stock representing more than 10% of the total combined voting power of all classes of stock of the Company (or any affiliated company), the per share price shall be not less than 100% of the Fair Market Value of the Shares on such date. The term "Shares" refers to the purchased Shares and all securities received in replacement of or in connection with the Shares pursuant to stock dividends or splits, all securities received in replacement of the Shares in a recapitalization, merger, reorganization, exchange or the like, and all new, substituted or additional securities or other properties to which Purchaser is entitled by reason of Purchaser's ownership of the Shares. 2. PURCHASE. The purchase and sale of the Shares under this Agreement shall occur at the principal office of the Company simultaneously with the execution of this Agreement by the parties, or on such other date as the Company and Purchaser shall agree (the "Purchase Date"). On the Purchase Date, the Company will deliver to Purchaser a certificate representing the Shares to be purchased by Purchaser (which shall be issued in Purchaser's name) against payment of the purchase price therefor by Purchaser by (a) check made payable to the Company, (b) cancellation of indebtedness of the Company to Purchase, (c) delivery of a promissory note in the form attached as Exhibit A to this Agreement (or in any form acceptable to the Company), or (d) by a combination of the foregoing. If Purchaser delivers a promissory note as partial or full payment of the purchase price, Purchaser shall also deliver a Pledge and Security Agreement in the form attached as Exhibit B to this Agreement (or in any form acceptable to the Company). 3. LIMITATIONS ON TRANSFER. In addition to any other limitation on transfer created by applicable securities laws, Purchaser shall not assign, encumber or dispose of any interest in the Shares while the Shares are subject to the Company's Repurchase Option (as defined below). After any Shares have been released from such Repurchase Option, Purchaser shall not assign, encumber or dispose of any interest in such Shares except in compliance with the provisions below and applicable securities laws. (a) REPURCHASE OPTION. (i) In the event of the voluntary or involuntary termination of Purchaser's employment or consulting relationship with the Company for any reason (including death or disability), with or without cause, the Company shall upon the date of such termination (the "Termination Date") have an irrevocable, exclusive option (the "Repurchase Option") for a period of 60 days from such date to repurchase all or any portion of the Shares held by Purchaser as of the Termination Date which have not yet been released from the Company's Repurchase Option at the original purchase price per Share specified in Section 1 (adjusted for any stock splits, stock dividends and the like). 56 (ii) The Repurchase Option shall be exercised by the Company by written notice to Purchaser or Purchaser's executor and, at the Company's option, (A) by delivery to Purchaser or Purchaser's executor with such notice of a check in the amount of the purchase price for the Shares being purchased, or (B) in the event Purchaser is indebted to the Company, by cancellation by the Company of an amount of such indebtedness equal to the purchase price for the Shares being repurchased, or (C) by a combination of (A) and (B) so that the combined payment and cancellation of indebtedness equals such purchase price. Upon delivery of such notice and payment of the purchase price in any of the ways described above, the Company shall become the legal and beneficial owner of the Shares being repurchased and all rights and interest therein or related thereto, and the Company shall have the right to transfer to its own name the number of Shares being repurchased by the Company, without further action by Purchaser. (iii) One hundred percent (100%) of the Shares shall initially be subject to the Repurchase Option. The Shares shall begin to be released from the Repurchase Option on the Vesting Commencement Date. 1/24th of the total number of Shares shall be released from the Repurchase Option each month thereafter on the Monthly Vesting Date (as set forth in the signature page of this Agreement), until all Shares are released from the Repurchase Option. Fractional shares shall be rounded to the nearest whole share. (b) RIGHT OF FIRST REFUSAL. Before any Shares held by Purchaser or any transferee of Purchaser (either being sometimes referred to herein as the "Holder") may be sold or otherwise transferred (including transfer by gift or operation of law), the Company or its assignee(s) shall have a right of first refusal to purchase the Shares on the terms and conditions set forth in this Section 3(b) (the "Right of First Refusal"). (i) NOTICE OF PROPOSED TRANSFER. The Holder of the Shares shall deliver to the Company a written notice (the "Notice") stating: (A) the Holder's bona fide intention to sell or otherwise transfer such Shares; (B) the name of each proposed purchaser or other transferee ("Proposed Transferee"); (C) the number of Shares to be transferred to each Proposed Transferee; and (D) the terms and conditions of each proposed sale or transfer. The Holder shall offer the Shares at the same price (the "Offered Price") and upon the same terms (or terms as similar as reasonably possible) to the Company or its assignee(s). (ii) EXERCISE OF RIGHT OF FIRST REFUSAL. At any time within thirty (30) days after receipt of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all, but not less than all, of the Shares proposed to be transferred to any one or more of the Proposed Transferees, at the purchase price determined in accordance with subsection (iii) below. (iii) PURCHASE PRICE. The purchase price ("Purchase Price") for the Shares purchased by the Company or its assignee(s) under this Section 3(b) shall be the Offered Price. If the Offered Price includes consideration other than cash, the cash equivalent value of the non-cash consideration shall be determined by the Board of Directors of the Company in good faith. - 2 - 57 (iv) PAYMENT. Payment of the Purchase Price shall be made, at the option of the Company or its assignee(s), in cash (by check), by cancellation of all or a portion of any outstanding indebtedness of the Holder to the Company (or, in the case of repurchase by an assignee, to the assignee), or by any combination thereof within 30 days after receipt of the Notice or in the manner and at the times set forth in the Notice. (v) HOLDER'S RIGHT TO TRANSFER. If all of the Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section 3(b), then the Holder may sell or otherwise transfer such Shares to that Proposed Transferee at the Offered Price or at a higher price, provided that such sale or other transfer is consummated within 60 days after the date of the Notice and provided further that any such sale or other transfer is effected in accordance with any applicable securities laws and the Proposed Transferee agrees in writing that the provisions of this Section 3 shall continue to apply to the Shares in the hands of such Proposed Transferee. If the Shares described in the Notice are not transferred to the Proposed Transferee within such period, or if the Holder proposes to change the price or other terms to make them more favorable to the Proposed Transferee, a new Notice shall be given to the Company, and the Company and/or its assignees shall again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred. (vi) EXCEPTION FOR CERTAIN FAMILY TRANSFERS. Anything to the contrary contained in this Section 3(b) notwithstanding, the transfer of any or all of the Shares during Purchaser's lifetime or on Purchaser's death by will or intestacy to Purchaser's Immediate Family or a trust for the benefit of Purchaser's Immediate Family shall be exempt from the provisions of this Section 3(b). "Immediate Family" as used herein shall mean spouse, lineal descendant or antecedent, father, mother, brother or sister. In such case, the transferee or other recipient shall receive and hold the Shares so transferred subject to the provisions of this Section, and there shall be no further transfer of such Shares except in accordance with the terms of this Section 3. (c) INVOLUNTARY TRANSFER. (i) COMPANY'S RIGHT TO PURCHASE UPON INVOLUNTARY TRANSFER. In the event, at any time after the date of this Agreement, of any transfer by operation of law or other involuntary transfer (including death or divorce, but excluding a transfer to Immediate Family as set forth in Section 3(b)(vi) above) of all or a portion of the Shares by the record holder thereof, the Company shall have an option to purchase all of the Shares transferred at the greater of the purchase price paid by Purchaser pursuant to this Agreement or the Fair Market Value of the Shares on the date of transfer. Upon such a transfer, the person acquiring the Shares shall promptly notify the Secretary of the Company of such transfer. The right to purchase such Shares shall be provided to the Company for a period of thirty (30) days following receipt by the Company of written notice by the person acquiring the Shares. (ii) PRICE FOR INVOLUNTARY TRANSFER. With respect to any stock to be transferred pursuant to Section 3(c)(i), the price per Share shall be a price set by the Board of Directors of the Company that will reflect the current value of the stock in terms of present earnings and future prospects of the Company. The Company shall notify Purchaser or his or her - 3 - 58 executor of the price so determined within thirty (30) days after receipt by it of written notice of the transfer or proposed transfer of Shares. However, if the Purchaser does not agree with the valuation as determined by the Board of Directors of the Company, the Purchaser shall be entitled to have the valuation determined by an independent appraiser to be mutually agreed upon by the Company and the Purchaser and whose fees shall be borne equally by the Company and the Purchaser. (d) ASSIGNMENT. The right of the Company to purchase any part of the Shares may be assigned in whole or in part to any stockholder or stockholders of the Company or other persons or organizations; provided, however, that an assignee, other than a corporation that is the parent or a 100% owned subsidiary of the Company, must pay the Company, upon assignment of such right, cash equal to the difference between the original purchase price and Fair Market Value, if the original purchase price is less than the Fair Market Value of the Shares subject to the assignment. (e) RESTRICTIONS BINDING ON TRANSFEREES. All transferees of Shares or any interest therein will receive and hold such Shares or interest subject to the provisions of this Agreement, including, insofar as applicable, the Company's option to repurchase under Section 3(a). Any sale or transfer of the Company's Shares shall be void unless the provisions of this Agreement are met. (f) TERMINATION OF RIGHTS. The right of first refusal granted the Company by Section 3(b) above and the option to repurchase the Shares in the event of an involuntary transfer granted the Company by Section 3(c) above shall terminate upon the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the Securities and Exchange Commission under the Securities Act of 1933, as amended (the "Securities Act"). Upon termination of the Right of First Refusal and the expiration or exercise of the Repurchase Option, a new certificate or certificates representing the Shares not repurchased shall be issued, on request, without the legend referred to in Section 6(a)(ii) herein and delivered to Purchaser. 4. ESCROW OF UNVESTED SHARES. For purposes of facilitating the enforcement of the provisions of Section 3 above, Purchaser agrees, immediately upon receipt of the certificate(s) for the Shares subject to the Company's Repurchase Option described in Section 3(a), to deliver such certificate(s), together with an Assignment Separate from Certificate in the form attached to this Agreement as Exhibit C executed by Purchaser and by Purchaser's spouse (if required for transfer), in blank, to the Secretary of the Company, or the Secretary's designee, to hold such certificate(s) and Assignment Separate from Certificate in escrow and to take all such actions and to effectuate all such transfers and/or releases as are in accordance with the terms of this Agreement. Purchaser hereby acknowledges that the Secretary of the Company, or the Secretary's designee, is so appointed as the escrow holder with the foregoing authorities as a material inducement to make this Agreement and that said appointment is coupled with an interest and is accordingly irrevocable. Purchaser agrees that said escrow holder shall not be liable to any party hereof (or to any other party). The escrow holder may rely upon any letter, notice or other document executed by any signature purported to be genuine and may resign at any time. Purchaser agrees that if the Secretary of the Company, or the Secretary's designee, resigns as escrow holder for any or no reason, the Board of Directors of the Company shall have - 4 - 59 the power to appoint a successor to serve as escrow holder pursuant to the terms of this Agreement. 5. INVESTMENT AND TAXATION REPRESENTATIONS. In connection with the purchase of the Shares, Purchaser represents to the Company the following: (a) Purchaser is aware of the Company's business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the securities. Purchaser is purchasing these securities for investment for his or her own account only and not with a view to, or for resale in connection with, any "distribution" thereof within the meaning of the Securities Act. (b) Purchaser understands that the securities have not been registered under the Securities Act by reason of a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of Purchaser's investment intent as expressed herein. (c) Purchaser further acknowledges and understands that the Shares are "restricted securities" under applicable U.S. federal and state securities laws and that, pursuant to these laws, Purchaser must hold the Shares indefinitely unless they are registered with the Securities and Exchange Commission and qualified by state authorities, or an exemption from such registration and qualification requirements is available. Purchaser acknowledges that the Company has no obligation to register or qualify the Shares for resale. Purchaser further acknowledges that if an exemption from registration or qualification is available, it may be conditioned on various requirements including, but not limited to, the time and manner of sale, the holding period for the Shares, and requirements relating to the Company which are outside of Purchaser's control, and which the Company is under no obligation and may not be able to satisfy. (d) Purchaser understands that Purchaser may suffer adverse tax consequences as a result of Purchaser's purchase or disposition of the Shares. Purchaser represents that Purchaser has consulted any tax consultants Purchaser deems advisable in connection the purchase or disposition of the Shares and that Purchaser is not relying on the Company for any tax advice. 6. RESTRICTIVE LEGENDS AND STOP-TRANSFER ORDERS. (a) LEGENDS. The certificate or certificates representing the Shares shall bear the following legends (as well as any legends required by applicable state and federal corporate and securities laws): (i) THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE "ACT") AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF THESE - 5 - 60 SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN COMPLIANCE THEREWITH. (ii) THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER AND RIGHT OF FIRST REFUSAL OPTIONS HELD BY THE ISSUER OR ITS ASSIGNEE(S) AS SET FORTH IN THE RESTRICTED STOCK PURCHASE AGREEMENT BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. SUCH TRANSFER RESTRICTIONS AND RIGHT OF FIRST REFUSAL ARE BINDING ON TRANSFEREES OF THESE SHARES. (b) STOP-TRANSFER NOTICES. Purchaser agrees that, in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate "stop transfer" instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records. (c) REFUSAL TO TRANSFER. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares shall have been so transferred. 7. NO EMPLOYMENT RIGHTS. Nothing in this Agreement shall affect in any manner whatsoever the right or power of the Company, or a parent or subsidiary of the Company, to terminate Purchaser's employment, for any reason, with or without cause. 8. SECTION 83(b) ELECTION. Purchaser understands that Section 83(a) of the Internal Revenue Code of 1986, as amended (the "Code"), taxes as ordinary income the difference between the amount paid for the Shares and the Fair Market Value of the Shares as of the date any restrictions on the Shares lapse. In this context, "restriction" means the right of the Company to buy back the Shares pursuant to the Repurchase Option set forth in Section 3(a) of this Agreement. Purchaser understands that Purchaser may elect to be taxed at the time the Shares are purchased, rather than when and as the Repurchase Option expires, by filing an election under Section 83(b) (an "83(b) Election") of the Code with the Internal Revenue Service within 30 days from the date of purchase. Even if the Fair Market Value of the Shares at the time of the execution of this Agreement equals the amount paid for the Shares, the election must be made to avoid income under Section 83(a) in the future. Purchaser understands that failure to file such an election in a timely manner may result in adverse tax consequences for Purchaser. Purchaser further understands that an additional copy of such election form should be filed with his or her federal income tax return for the calendar year in which the date of this Agreement falls. Purchaser acknowledges that the foregoing is only a summary of the effect of United - 6 - 61 States federal income taxation with respect to purchase of the Shares hereunder, and does not purport to be complete. Purchaser further acknowledges that the Company has directed Purchaser to seek independent advice regarding the applicable provisions of the Code, the income tax laws of any municipality, state or foreign country in which Purchaser may reside, and the tax consequences of Purchaser's death. Purchaser agrees that he will execute and deliver to the Company with this executed Agreement a copy of the Acknowledgment and Statement of Decision Regarding Section 83(b) Election (the "Acknowledgment"), attached hereto as Exhibit D. Purchaser further agrees that Purchaser will execute and submit with the Acknowledgment a copy of the 83(b) Election, attached hereto as Exhibit E, if Purchaser has indicated in the Acknowledgment his or her decision to make such an election. 9. MARKET STANDOFF AGREEMENT. In connection with the initial public offering of the Company's securities and upon request of the Company or the underwriters managing any underwritten offering of the Company's securities, Purchaser agrees not to sell, make any short sale of, loan, grant any option for the purchase of, or otherwise dispose of any Shares (other than those included in the registration) without the prior written consent of the Company or such underwriters, as the case may be, for such period of time (not to exceed 180 days) from the effective date of such registration as may be requested by the Company or such managing underwriters and to execute an agreement reflecting the foregoing as may be requested by the underwriters at the time of the Company's initial public offering. 11. MISCELLANEOUS. (a) GOVERNING LAW. This Agreement and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of California, without giving effect to principles of conflicts of law. (b) ENTIRE AGREEMENT; ENFORCEMENT OF RIGHTS. This Agreement sets forth the entire agreement and understanding of the parties relating to the subject matter herein and merges all prior discussions between them. No modification of or amendment to this Agreement, nor any waiver of any rights under this Agreement, shall be effective unless in writing signed by the parties to this Agreement. The failure by either party to enforce any rights under this Agreement shall not be construed as a waiver of any rights of such party. (c) SEVERABILITY. If one or more provisions of this Agreement are held to be unenforceable under applicable law, the parties agree to renegotiate such provision in good faith. In the event that the parties cannot reach a mutually agreeable and enforceable replacement for such provision, then (i) such provision shall be excluded from this Agreement, (ii) the balance of the Agreement shall be interpreted as if such provision were so excluded and (iii) the balance of the Agreement shall be enforceable in accordance with its terms. (d) CONSTRUCTION. This Agreement is the result of negotiations between and has been reviewed by each of the parties hereto and their respective counsel, if any; accordingly, - 7 - 62 this Agreement shall be deemed to be the product of all of the parties hereto, and no ambiguity shall be construed in favor of or against any one of the parties hereto. (e) NOTICES. Any notice required or permitted by this Agreement shall be in writing and shall be deemed sufficient when delivered personally or sent by telegram or fax or forty-eight (48) hours after being deposited in the U.S. mail, as certified or registered mail, with postage prepaid, and addressed to the party to be notified at such party's address as set forth below or as subsequently modified by written notice. (f) COUNTERPARTS. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument. (g) SUCCESSORS AND ASSIGNS. The rights and benefits of this Agreement shall inure to the benefit of, and be enforceable by the Company's successors and assigns. The rights and obligations of Purchaser under this Agreement may only be assigned with the prior written consent of the Company. (h) CALIFORNIA CORPORATE SECURITIES LAW. THE SALE OF THE SECURITIES WHICH ARE THE SUBJECT OF THIS AGREEMENT HAS NOT BEEN QUALIFIED WITH THE COMMISSIONEER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE ISSUANCE OF THE SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE CONSIDERATION THEREFOR PRIOR TO THE QUALIFICATION IS UNLAWFUL, UNLESS THE SALE OF SECURITIES IS EXEMPT FROM QUALIFICATION BY SECTION 25100, 25102 OR 25105 OF THE CALIFORNIA CORPORATIONS CODE. THE RIGHTS OF ALL PARTIES TO THIS AGREEMENT ARE EXPRESSLY CONDITIONED UPON THE QUALIFICATION BEING OBTAINED, UNLESS THE SALE IS SO EXEMPT. [Signature Page Follows] - 8 - 63 The parties have executed this Agreement as of the date first set forth above. PDF SOLUTIONS, INC. By: ------------------------------------ Title: --------------------------------- Address: 333 West San Carlos Street, Suite 700 San Jose, CA 95110 PURCHASER: <<Optionee>> ------------------------------------ (Signature) Address: ------------------------------------ ------------------------------------ Monthly Vesting Date: __ of each month I, ________________________________, spouse of <<Optionee>>, have read and hereby approve the foregoing Agreement. In consideration of the Company's granting my spouse the right to purchase the Shares as set forth in the Agreement, I hereby agree to be irrevocably bound by the Agreement and further agree that any community property or other such interest shall be similarly bound by the Agreement. I hereby appoint my spouse as my attorney-in-fact with respect to any amendment or exercise of any rights under the Agreement. ------------------------------------ Spouse of <<Optionee>> - 9 - 64 EXHIBIT A PROMISSORY NOTE $ ________ __________, California _______________, 2000 For value received, the undersigned promises to pay PDF Solutions, Inc., a California corporation (the "Company"), at its principal office the principal sum of $ ______ with interest from the date hereof at a rate of _____% per annum, compounded semiannually, on the unpaid balance of such principal sum. Such principal and interest shall be due and payable on the fourth anniversary of the date of this note. If the undersigned's employment or consulting relationship with the Company is terminated prior to payment in full of this Note, this Note shall be immediately due and payable. Principal and interest are payable in lawful money of the United States of America. AMOUNTS DUE UNDER THIS NOTE MAY BE PREPAID AT ANY TIME WITHOUT INTEREST OR PENALTY. Should suit be commenced to collect any sums due under this Note, such sum as the Court may deem reasonable shall be added hereto as attorneys' fees. The makers and endorsers have severally waived presentment for payment, protest, notice of protest, and notice of nonpayment of this Note. This Note, which is full recourse, is secured by a pledge of certain shares of Common Stock of the Company and is subject to the terms of a Pledge and Security Agreement between the undersigned and the Company of even date herewith. ------------------------------------ <<Optionee>> 65 EXHIBIT B PLEDGE AND SECURITY AGREEMENT This Pledge and Security Agreement (the "Agreement") is entered into this day of ___________, 2000 by and between PDF Solutions, Inc., a California corporation (the "Company") and <<Optionee>> ("Purchaser"). RECITALS In connection with Purchaser's purchase of certain shares of the Company's Common Stock (the "Shares") pursuant to a Restricted Stock Purchase Agreement dated _____________________, 2000 between Purchaser and the Company, Purchaser is delivering a promissory note of even date herewith (the "Note") in full or partial payment of the exercise price for the Shares. The Company requires that the Note be secured by a pledge of the Shares on the terms set forth below. AGREEMENT In consideration of the Company's acceptance of the Note as full or partial payment of the exercise price of the Shares, and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto agree as follows: 1. The Note shall become payable in full upon the voluntary or involuntary termination or cessation of employment of Purchaser with the Company, for any reason, with or without cause (including death or disability). 2. Purchaser shall deliver to the Secretary of the Company, or his or her designee (hereinafter referred to as the "Pledge Holder"), all certificates representing the Shares, together with an Assignment Separate from Certificate in the form attached to this Agreement as Attachment A executed by Purchaser and by Purchaser's spouse (if required for transfer), in blank, for use in transferring all or a portion of the Shares to the Company if, as an when required pursuant to this Agreement. In addition, if Purchaser is married, Purchaser's spouse shall execute the signature page attached to this Agreement. 3. As security for the payment of the Note and any renewal, extension or modification of the Note, Purchaser hereby grants to the Company a security interest in and pledges with and delivers to the Company Purchaser's Shares (sometimes referred to herein as the "Collateral"). 4. In the event that Purchaser prepays all or a portion of the Note, in accordance with the provisions thereof, Purchaser intends, unless written notice to the contrary is delivered to the Pledge Holder, that the Shares represented by the portion of the Note so repaid, including annual interest thereon, shall continue to be so held by the Pledge Holder, to serve as independent collateral for the outstanding portion of the Note for the purpose of commencing the holding period set forth in Rule 144(d) promulgated under the Securities Act of 1933, as amended (the "Securities Act"). 66 5. In the event of any foreclosure of the security interest created by this Agreement, the Company may sell the Shares at a private sale or may repurchase the Shares itself. The parties agree that, prior to the establishment of a public market for the Shares of the Company, the securities laws affecting sale of the Shares make a public sale of the Shares commercially unreasonable. The parties further agree that the repurchasing of such Shares by the Company, or by any person to whom the Company may have assigned its rights under this Agreement, is commercially reasonable if made at a price determined by the Board of Directors in its discretion, fairly exercised, representing what would be the fair market value of the Shares reduced by any limitation on transferability, whether due to the size of the block of shares or the restrictions of applicable securities laws. 6. In the event of default in payment when due of any indebtedness under the Note, the Company may elect than, or at any time thereafter, to exercise all rights available to a secured party under the California commercial Code including the right to sell the Collateral at a private or public sale or repurchase the Shares as provided above. The proceeds of any sale shall be applied in the following order: (a) To the extent necessary, proceeds shall be used to pay all reasonable expenses of the Company in enforcing this Agreement and the Note, including, without limitation, reasonable attorney's fees and legal expenses incurred by the Company. (b) To the extent necessary, proceeds shall be used to satisfy any remaining indebtedness under Purchaser's Note. (c) Any remaining proceeds shall be delivered to Purchaser. 7. Upon full payment by Purchaser of all amounts due under the Note, Pledge Holder shall deliver to Purchaser all Shares in Pledge Holder's possession belonging to Purchaser, and Pledge Holder shall thereupon be discharged of all further obligations under this Agreement; provided, however, that Pledge Holder shall nevertheless retain the Shares as escrow agent if at the time of full payment by Purchaser said Shares are still subject to a Repurchase Option in favor of the Company. - 2 - 67 The parties have executed this Pledge and Security Agreement as of the date first set forth above. COMPANY: PDF SOLUTIONS, Inc. By: ------------------------------------- Name: ----------------------------------- (print) Title: ---------------------------------- Address: 333 West San Carlos Street, Suite 700 San Jose, CA 95110 PURCHASER: <<Optionee>> ------------------------------------ (Signature) Address: ------------------------------------ ------------------------------------ - 3 - 68 ATTACHMENT A ASSIGNMENT SEPARATE FROM CERTIFICATE FOR VALUE RECEIVED and pursuant to that certain Pledge and Security Agreement between the undersigned ("Purchaser") and PDF Solutions, Inc., dated _____________, 2000 (the "Agreement"), Purchaser hereby sells, assigns and transfers unto _______________________________ (________) shares of the Common Stock of PDF Solutions, Inc., standing in Purchaser's name on the books of said corporation represented by Certificate No. ___ herewith and hereby irrevocably appoints _____________________________ to transfer said stock on the books of the within-named corporation with full power of substitution in the premises. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT. Dated: ____________ Signature: ------------------------------------ <<Optionee>> ------------------------------------ Spouse of <<Optionee>> (if applicable) Instruction: Please do not fill in any blanks other than the signature line. The purpose of this assignment is to perfect the security interest of the Company pursuant to the Agreement. 69 EXHIBIT C ASSIGNMENT SEPARATE FROM CERTIFICATE FOR VALUE RECEIVED and pursuant to that certain Restricted Stock Purchase Agreement between the undersigned ("Purchaser") and PDF Solutions, Inc., dated ____________2000 (the "Agreement"), Purchaser hereby sells, assigns and transfers unto _________________________________ (________) shares of the Common Stock of PDF Solutions, Inc., standing in Purchaser's name on the books of said corporation represented by Certificate No. ___ herewith and does hereby irrevocably constitute and appoint ________________________________________________ to transfer said stock on the books of the within-named corporation with full power of substitution in the premises. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND THE EXHIBITS THERETO. Dated: ______________________ Signature: ------------------------------------ <<Optionee>> ------------------------------------ Spouse of <<Optionee>> (if applicable) Instruction: Please do not fill in any blanks other than the signature line. The purpose of this assignment is to enable the Company to exercise its repurchase option set forth in the Agreement without requiring additional signatures on the part of Purchaser. 70 EXHIBIT D ACKNOWLEDGMENT AND STATEMENT OF DECISION REGARDING SECTION 83(b) ELECTION The undersigned (which term includes the undersigned's spouse), a purchaser of <<NoofShares>> shares of Common Stock of PDF Solutions, Inc., a California corporation (the "Company") by exercise of stock purchase right (the "Right"), hereby states as follows: 1. The undersigned has carefully reviewed the stock purchase agreement pursuant to which the Right was granted. 2. The undersigned either [check and complete as applicable]: (a)____ has consulted, and has been fully advised by, the undersigned's own tax advisor, __________________________, whose business address is _____________________________, regarding the federal, state and local tax consequences of purchasing these shares, and particularly regarding the advisability of making elections pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended (the "Code") and pursuant to the corresponding provisions, if any, of applicable state law; or (b)____ has knowingly chosen not to consult such a tax advisor. 3. The undersigned hereby states that the undersigned has decided [check as applicable]: (a)____ to make an election pursuant to Section 83(b) of the Code, and is submitting to the Company, together with the undersigned's executed Restricted Stock Purchase Agreement, an executed form entitled "Election Under Section 83(b) of the Internal Revenue Code of 1986;" or (b)____ not to make an election pursuant to Section 83(b) of the Code. 4. Neither the Company nor any subsidiary or representative of the Company has made any warranty or representation to the undersigned with respect to the tax consequences of the undersigned's purchase of shares or of the making or failure to make an election pursuant to Section 83(b) of the Code or the corresponding provisions, if any, of applicable state law. Date: - ----------------------------------- ----------------------------------- <<Optionee>> Date: - ----------------------------------- ----------------------------------- Spouse of <<Optionee>> 71 EXHIBIT E ELECTION UNDER SECTION 83(b) OF THE INTERNAL REVENUE CODE OF 1986 The undersigned taxpayer hereby elects, pursuant to Section 83(b) of the Internal Revenue Code, to include in taxpayer's gross income for the current taxable year, the amount of any compensation taxable to taxpayer in connection with taxpayer's receipt of the property described below: 1. The name, address, taxpayer identification number and taxable year of the undersigned are as follows: NAME OF TAXPAYER: <<Optionee>> NAME OF SPOUSE: _______________ ADDRESS: ________________________________________ ________________________________________ IDENTIFICATION NO. OF TAXPAYER: _______________ IDENTIFICATION NO. OF SPOUSE: _______________ TAXABLE YEAR: _______________ 2. The property with respect to which the election is made is described as follows: <<NoofShares>> shares of the Common Stock (the "Shares"), $0.0001 par value, of PDF Solutions, Inc., a California corporation (the "Company"). 3. The date on which the property was transferred is: _______________ 4. The property is subject to the following restrictions: Repurchase option at cost in favor of the Company upon termination of taxpayer's employment or consulting relationship. 5. The fair market value at the time of transfer, determined without regard to any restriction other than a restriction which by its terms will never lapse, of such property is: $ _______. 6. The amount (if any) paid for such property: $ ________. The undersigned has submitted a copy of this statement to the person for whom the services were performed in connection with the undersigned's receipt of the above-described property. The transferee of such property is the person performing the services in connection with the transfer of said property. The undersigned understands that the foregoing election may not be revoked except with the consent of the Commissioner. Date: - ----------------------------------- ----------------------------------- <<Optionee>> Date: - ----------------------------------- ----------------------------------- Spouse of <<Optionee>>