Semitool (SMTL) SC TO-T Third party tender offer statement

Exhibit (a)(2)

LETTER OF TRANSMITTAL

To Tender Shares of Common Stock

of

Semitool, Inc.

Pursuant to the Offer to Purchase dated November 19, 2009

to

Jupiter Acquisition Sub, Inc.,

a wholly-owned subsidiary of

Applied Materials, Inc.

THE OFFER (AS DEFINED HEREIN) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT (ONE MINUTE AFTER 11:59 P.M.), NEW YORK CITY TIME, ON DECEMBER 17, 2009, UNLESS THE OFFER IS EXTENDED. SHARES TENDERED PURSUANT TO THE OFFER MAY BE WITHDRAWN AT ANY TIME PRIOR TO THE EXPIRATION DATE OF THE OFFER.

The Depositary for the Offer is:

BNY MELLON SHAREOWNER SERVICES

If delivering by mail:	By Overnight Courier:	If delivering by hand or courier:
BNY Mellon Shareowner Services Corporate Action Division P.O. Box 3301 South Hackensack, NJ 07606	BNY Mellon Shareowner Services Corporate Action Division 27th Floor 480 Washington Blvd. Jersey City, NJ 07310 By Facsimile Transmission: (For Eligible Institutions Only) (201) 680-4626	BNY Mellon Shareowner Services Corporate Action Division 27th Floor 480 Washington Blvd. Jersey City, NJ 07310

To Confirm Facsimile Transmissions:(201) 680-4860 (For Confirmation Only)

YOU SHOULD READ CAREFULLY THIS LETTER OF TRANSMITTAL, INCLUDING THE ACCOMPANYING INSTRUCTIONS, BEFORE YOU COMPLETE IT. FOR THIS LETTER OF TRANSMITTAL TO BE VALIDLY DELIVERED, IT MUST BE RECEIVED BY THE DEPOSITARY AT ONE OF THE ABOVE ADDRESSES BEFORE OUR OFFER EXPIRES (IN ADDITION TO THE OTHER REQUIREMENTS DETAILED IN THIS LETTER OF TRANSMITTAL AND ITS INSTRUCTIONS). DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY TO THE DEPOSITARY FOR THE OFFER. DELIVERIES TO APPLIED MATERIALS, INC., JUPITER ACQUISITION SUB, INC., THE INFORMATION AGENT OR THE BOOK-ENTRY TRANSFER FACILITY WILL NOT BE FORWARDED TO THE DEPOSITARY AND WILL NOT CONSTITUTE VALID DELIVERY.

YOU MUST SIGN THIS LETTER OF TRANSMITTAL IN THE APPROPRIATE SPACE PROVIDED BELOW, WITH SIGNATURE GUARANTEE IF REQUIRED, AND COMPLETE THE SUBSTITUTE FORM W-9 SET FORTH BELOW.

SHAREHOLDERS WHO HAVE ALREADY TENDERED SHARES PURSUANT TO THE OFFER USING A PREVIOUSLY DISTRIBUTED (BLUE) LETTER OF TRANSMITTAL OR (YELLOW) NOTICE OF GUARANTEED DELIVERY NEED NOT TAKE ANY FURTHER ACTION IN ORDER TO RECEIVE THE OFFER PRICE IF SHARES ARE ACCEPTED FOR PAYMENT AND PAID FOR BY JUPITER ACQUISITION SUB, INC. PURSUANT TO THE OFFER, EXCEPT AS MAY BE REQUIRED BY THE GUARANTEED DELIVERY PROCEDURES, IF SUCH PROCEDURES WERE UTILIZED.

Description of Shares Tendered
Name(s) and Address(es) of Registered Holder(s) (Please Fill In, if Blank, Exactly as Name(s) and Addresses Appear(s) on Share Certificate(s))	Shares Tendered (Attach Additional Signed List If Necessary)
	Share Certificate Number(s)*	Total Number of Shares Represented by Share Certificate(s)*	Number of Shares Tendered**
	Total Shares
*  Need not be completed if transfer is made by book-entry transfer. **  Unless otherwise indicated, it will be assumed that all shares represented by the listed certificates are being tendered. See Instruction 4. IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN HAVE BEEN LOST OR DESTROYED, SEE INSTRUCTION 10.

This Letter of Transmittal is to be used either if certificates for Shares (as defined herein) are to be delivered herewith or, unless an Agent’s Message (as defined in Section 2 (Procedures for Tendering Shares of Semitool Common Stock in the Offer) of the Offer to Purchase, which is defined herein) is utilized, if delivery of Shares is to be made pursuant to the procedures for book-entry transfer described in Section 2 of the Offer to Purchase to an account maintained by the Depositary (as defined herein) at the Book-Entry Transfer Facility (as defined in Section 2 of the Offer to Purchase). Shareholders whose certificates for Shares are not immediately available or who cannot deliver either the certificates for, or a Book-Entry Confirmation (as defined in Section 2 of the Offer to Purchase) with respect to, their Shares, and all other documents required hereby, to the Depositary prior to the Expiration Date (as defined in Section 1 (Terms of the Offer) of the Offer to Purchase) of the Offer must tender their Shares in accordance with the guaranteed delivery procedures described in Section 2 of the Offer to Purchase. See Instruction 2.

¨ CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER MADE TO AN ACCOUNT MAINTAINED BY THE DEPOSITARY WITH THE BOOK-ENTRY TRANSFER FACILITY AND COMPLETE THE FOLLOWING (ONLY PARTICIPANTS IN THE BOOK-ENTRY TRANSFER FACILITY MAY DELIVER SHARES BY BOOK-ENTRY TRANSFER):

Name of Tendering Institution:                                                                                                                                                                               

Account Number:                                                                             Transaction Code Number:                                                                    

¨ CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY, ENCLOSE A PHOTOCOPY OF SUCH NOTICE OF GUARANTEED DELIVERY AND COMPLETE THE FOLLOWING:

Name (s) of Registered Owner (s):                                                                                                                                                                          

Date of Execution of Notice of Guaranteed Delivery:                                                                                                                                    

Name of Institution that Guaranteed Delivery:                                                                                                                                                 

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NOTE: SIGNATURES MUST BE PROVIDED BELOW

PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

The undersigned hereby tenders to Jupiter Acquisition Sub, Inc., a Montana corporation (“Acquisition Sub”) and a wholly-owned subsidiary of Applied Materials, Inc., a Delaware corporation (“Applied”), the above described shares of common stock, no par value per share (“Shares”), of Semitool, Inc., a Montana corporation (“Semitool”), upon the terms and subject to the conditions set forth in Acquisition Sub’s Offer to Purchase, dated November19, 2009 (the “Offer to Purchase”), and this Letter of Transmittal (which, together with any amendments or supplements thereto or hereto, collectively constitute the “Offer”), receipt of which is hereby acknowledged.

Upon the terms of the Offer, subject to, and effective upon, acceptance for payment of, and payment for, the Shares tendered herewith in accordance with the terms of the Offer, the undersigned hereby sells, assigns and transfers to, or upon the order of, Acquisition Sub all right, title and interest in and to all the Shares that are being tendered herewith (and any and all dividends, distributions, other Shares or other securities or rights issued or issuable in respect thereof on or after November19, 2009 (collectively, “Distributions”)) and irrevocably constitutes and appoints BNY Mellon Shareowner Services (the “Depositary”) the true and lawful agent and attorney-in-fact of the undersigned, with full power of substitution (such power of attorney being deemed to be an irrevocable power coupled with an interest), to the full extent of the undersigned’s rights with respect to such Shares (and any and all Distributions) (i) to deliver certificates for such Shares (and any such other Shares or securities or rights) or transfer ownership of such Shares (and any and all Distributions) on the account books maintained by the Book-Entry Transfer Facility together, in any such case, with all accompanying evidences of transfer and authenticity to, or upon the order of, Acquisition Sub, (ii) to present such Shares (and any and all Distributions) for transfer on Semitool’s books and (iii) to receive all benefits and otherwise exercise all rights of beneficial ownership of such Shares (and any and all Distributions), all in accordance with the terms of the Offer.

The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the Shares tendered herewith (and any and all Distributions) and, when the same are accepted for payment by Acquisition Sub, Acquisition Sub will acquire good title thereto, free and clear of all liens, restrictions, claims and encumbrances, and the same will not be subject to any adverse claim. The undersigned will, upon request, execute any additional documents deemed by the Depositary or Acquisition Sub to be necessary or desirable to complete the sale, assignment and transfer of the Shares tendered herewith (and any and all Distributions). In addition, the undersigned shall remit and transfer promptly to the Depositary for the account of Acquisition Sub any and all Distribution in respect of the Shares tendered hereby, accompanied by appropriate documentation of transfer, and, pending such remittance and transfer or appropriate assurance thereof, Acquisition Sub shall be entitled to all rights and privileges as owner of each such Distribution and may withhold the entire purchase price of the Shares tendered hereby or deduct from such purchase price, the amount of value of such Distribution as determined by Acquisition Sub in its sole discretion.

All authority conferred or agreed to be conferred pursuant to this Letter of Transmittal shall be binding upon the successors, assigns, heirs, executors, administrators and legal representatives of the undersigned and shall not be affected by, and shall survive, the death or incapacity of the undersigned. Except as described in the Offer to Purchase, this tender is irrevocable. Acquisition Sub reserves the right to require that, in order for the Shares or other securities to be deemed validly tendered, immediately upon Acquisition Sub’s acceptance for payment of such Shares, Acquisition Sub must be able to exercise full voting, consent and other rights with respect to such Shares (and any and all Distributions), including voting at any meeting of Semitool’s shareholders.

By executing this Letter of Transmittal, the undersigned hereby irrevocably appoints each of Mr. Scott Harlan and Mr. Greg Psihas as an attorney-in-fact and proxy of the undersigned, each with full power of substitution and resubstitution, to vote at any annual, special, adjourned or postponed meeting of Semitool’s shareholders or otherwise in such manner

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as each such attorney-in-fact and proxy (or his or her substitute) shall in his or her sole discretion deem proper with respect to, to execute any written consent concerning any matter as each such attorney-in-fact and proxy (or his or her substitute) shall in his or her sole discretion deem proper with respect to, and to otherwise act as each such attorney-in-fact and proxy (or his or her substitute) shall in his or her sole discretion deem proper with respect to, the Shares tendered herewith that have been accepted for payment by Acquisition Sub prior to the time any such action is taken and with respect to which the undersigned is entitled to vote (and any and all Distributions). This appointment is effective only when, and only to the extent that, Acquisition Sub accepts for payment and pays for such Shares as provided in the Offer to Purchase. This power of attorney and proxy are irrevocable and are granted in consideration of the acceptance for payment of such Shares in accordance with the terms of the Offer. Upon such acceptance for payment, all prior powers of attorney, proxies and consents given by the undersigned with respect to the Shares tendered herewith (and any and all Distributions) will, without further action, be revoked and no subsequent powers of attorney, proxies, consents or revocations may be given (and, if given, will not be deemed effective) by the undersigned in respect of such Shares.

The undersigned understands that the valid tender of Shares pursuant to any of the procedures described in the Offer to Purchase and in the Instructions hereto will constitute a binding agreement between the undersigned and Acquisition Sub upon the terms of and subject to the conditions to the Offer (and if the Offer is extended or amended, the terms or conditions of any such extension or amendment).

Unless otherwise indicated herein in the box labeled “Special Payment Instructions,” please issue the check for the purchase price and/or return any certificate(s) for Shares not tendered or accepted for payment in the name(s) of the registered holder(s) indicated herein in the box labeled “Description of Shares Tendered” on the cover page of this Letter of Transmittal. Similarly, unless otherwise indicated herein in the box labeled “Special Delivery Instructions,” please mail the check for the purchase price and/or return any certificates for Shares not tendered or accepted for payment (and accompanying documents, as appropriate) to the address(es) of the registered holder(s) indicated herein in the box labeled “Description of Shares Tendered” on the cover page of this Letter of Transmittal. In the event that both of the boxes herein labeled “Special Payment Instructions” and “Special Delivery Instructions,” respectively, are completed, please issue the check for the purchase price and/or return any certificate(s) for Shares not tendered or accepted for payment (and any accompanying documents, as appropriate) in the name of, and deliver such check and/or return such certificates (and any accompanying documents, as appropriate) to, the person or persons indicated therein. Please credit any Shares tendered herewith by book-entry transfer that are not accepted for payment by crediting the account at the Book-Entry Transfer Facility. The undersigned recognizes that Acquisition Sub has no obligation pursuant to the Special Payment Instructions to transfer any Shares from the name of the registered holder(s) thereof if Acquisition Sub does not accept for payment any of the Shares so tendered.

IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN HAVE BEEN LOST OR DESTROYED, SEE INSTRUCTION 10.

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SPECIAL PAYMENT INSTRUCTIONS (See Instructions 1, 5, 6 and 7) To be completed ONLY if certificate(s) for Shares not tendered or not accepted for payment and/or the check for the purchase price of Shares accepted for payment is/are to be issued in the name of someone other than the undersigned. Issue        ¨    check        ¨     certificates to:
Name
	(Please Print)
Address
(Include Zip Code)
(Employer Identification or Social Security Number)

SPECIAL DELIVERY INSTRUCTIONS (See Instructions 1, 5, 6 and 7) To be completed ONLY if certificate(s) for Shares not tendered or not accepted for payment and/or the check for the purchase price of Shares accepted for payment is/are to be mailed to someone other than the undersigned or to the undersigned at an address other than that listed above. Issue        ¨    check        ¨     certificates to:
Name
	(Please Print)
Address
(Include Zip Code)
(Employer Identification or Social Security Number)

(Also complete Substitute Form W-9 below)

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SIGN HERE

(Also Complete Substitute Form W-9 Below)

Signature                                                                                                                                                                                                                             

(Signature(s) of Shareholder(s))

Dated:                                     , 2009

(Must be signed by registered holder(s) as name(s) appear(s) on the certificate(s) for the Shares or on a security position listing or by person(s) authorized to become registered holder(s) by certificates and documents transmitted herewith. If signature is by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, please provide the following information and see Instruction 5.)

Name (s)                                                                                                                                                                                                                              

(Please Print)

Capacity (Full Title)                                                                                                                                                                                                       

Address                                                                                                                                                                                                                               

(Include Zip Code)

Daytime Area Code and Telephone Number                                                                                                                                                         

Taxpayer Identification or Social Security Number                                                                                                                                            

(See Substitute Form W-9)                                    

GUARANTEE OF SIGNATURE(S)

(If Required—See Instructions 1 and 5)

FOR USE BY FINANCIAL INSTITUTIONS ONLY. PLACE MEDALLION GUARANTEE IN SPACE BELOW.

Authorized Signature                                                                                                                                                                                                     

Name                                                                                                                                                                                                                                    

(Please Print)

Title                                                                                                                                                                                                                                      

Name of Firm                                                                                                                                                                                                                    

Address                                                                                                                                                                                                                               

(Include Zip Code)

Daytime Area Code and Telephone Number                                                                                                                                                         

Dated:                                , 2009                                                                                                                                                                           

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INSTRUCTIONS

FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER

1.    Guarantee of Signatures.    No signature guarantee is required on this Letter of Transmittal if (i) this Letter of Transmittal is signed by the registered holder(s) of Shares tendered herewith, unless such registered holder(s) has completed either the box labeled “Special Payment Instructions” or the box labeled “Special Delivery Instructions” on this Letter of Transmittal or (ii) such Shares are tendered for the account of a financial institution (including most banks, savings and loan associations and brokerage houses) that is a participant in the Securities Transfer Agents Medallion Program, the Stock Exchanges Medallion Program or by any other eligible guarantor institution, as such term is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended (each, an “Eligible Institution”). For purposes of this Instruction, a registered holder of Shares includes any participant in the Book-Entry Transfer Facilities system whose name appears on a security position listing as the owner of the Shares. In all other cases, all signatures on this Letter of Transmittal must be guaranteed by an Eligible Institution. See Instruction 5. If certificates representing Shares being tendered in the Offer are registered in the name of a person other than the signer of this Letter of Transmittal, or if payment is to be made, or certificates representing Shares not being tendered or not accepted for payment are to be returned, to a person other than the registered holder of the certificates surrendered, the tendered certificates must be endorsed or accompanied by appropriate stock powers, in either case, signed exactly as the name or names of the registered holders or owners appear on such certificates, with the signatures on such certificates or stock powers guaranteed as aforesaid. See Instruction 5.

2.    Requirements of Tender.    This Letter of Transmittal is to be completed by shareholders either if certificates are to be tendered herewith or, unless an Agent’s Message is utilized, if delivery of Shares is to be made pursuant to the procedures for book-entry transfer described in Section 2 (Procedures for Tendering Shares of Semitool Common Stock in the Offer) of the Offer to Purchase to an account maintained by the Depositary at the Book Entry Transfer Facility. For a shareholder to validly tender Shares in the Offer, either (i) the certificate(s) representing the tendered Shares, together with this Letter of Transmittal (or a photocopy of this Letter of Transmittal), properly completed and duly executed, together with any required signature guarantees and any other required documents, must be received by the Depositary at one of its addresses listed herein prior to the Expiration Date, (ii) in the case of a tender effected pursuant to a book-entry transfer (a) either this Letter of Transmittal (or a photocopy of this Letter of Transmittal), properly completed and duly executed, together with any required signature guarantees, or an Agent’s Message, and any other required documents, must be received by the Depositary at one of its addresses listed herein prior to the Expiration Date and (b) the Shares to be tendered must be delivered pursuant to the book-entry transfer procedures described in Section 2 of the Offer to Purchase and a Book-Entry Confirmation must be received by the Depositary prior to the Expiration Date or (iii) the tendering shareholder must comply with the guaranteed delivery procedures described in Section 2 of the Offer to Purchase prior to the Expiration Date.

If a shareholder desires to tender Shares in the Offer and such shareholder’s certificates representing such Shares are not immediately available, or the book-entry transfer procedures described in Section 2 of the Offer to Purchase cannot be completed on a timely basis, or time will not permit all required documents to reach the Depositary prior to the Expiration Date, such shareholder may tender such Shares if all the following conditions are met: (i) such tender is made by or through an Eligible Institution; (ii) a properly completed and duly executed Notice of Guaranteed Delivery, substantially in the form provided by Acquisition Sub, is received by the Depositary at one of its addresses listed herein prior to the Expiration Date; and (iii) either (a) the certificates representing such Shares, together with this Letter of Transmittal (or a photocopy of this Letter of Transmittal), properly completed and duly executed, and any required signature guarantees, and any other required documents, are received by the Depositary at one of its addresses listed herein within three trading days (as described below) after the date of execution of such Notice of Guaranteed Delivery, or (b) in the case of a book-entry transfer effected pursuant to the book-entry transfer procedures described in Section 2 of the Offer to Purchase, (1) either this Letter of Transmittal (or a photocopy of this Letter of Transmittal), properly completed and duly executed, and any required signature guarantees, or an Agent’s Message, and any other required documents, are received by the Depositary at one of its addresses listed herein and (2) such Shares are delivered pursuant to the book-entry transfer procedures described in Section 2 of the Offer to Purchase and a Book-Entry Confirmation is received by the Depositary, in each case within three trading days after the date of execution of such Notice of Guaranteed Delivery. For purposes of the foregoing, a trading day is any day on which The Nasdaq Global Select Market is open for business.

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The method of delivery of Shares to be tendered in the Offer, this Letter of Transmittal and all other required documents, including delivery through the Book-Entry Transfer Facility, is at the election and risk of the tendering shareholder. Shares to be tendered in the Offer, will be deemed delivered only when actually received by the Depositary (including, in the case of a book-entry transfer, by Book-Entry Confirmation). If delivery of Shares is by mail, registered mail with return receipt requested, properly insured, is recommended. In all cases, sufficient time should be allowed to ensure timely delivery.

No alternative, conditional or contingent tenders will be accepted and no fractional Shares will be accepted for payment. All tendering shareholders, by execution of this Letter of Transmittal (or a photocopy of this Letter of Transmittal), waive any right to receive any notice of the acceptance of their Shares for payment.

3.    Inadequate Space.    If the space provided herein is inadequate, the certificate numbers and/or the number of Shares should be listed on a separate schedule attached hereto and separately signed on each page in the same manner as this Letter of Transmittal.

4.    Partial Tenders (Applicable to Certificate Shareholders Only).    If fewer than all the Shares evidenced by any certificate submitted are to be tendered herewith, fill in the number of Shares that are to be tendered in the box entitled “Number of Shares Tendered.” In any such case, new certificate(s) for the remainder of the Shares that were evidenced by the old certificate(s) will be sent to the registered holder(s), unless otherwise provided in the appropriate box on this Letter of Transmittal, as soon as practicable after the acceptance of payment of, and payment for, the Shares tendered herewith. All Shares represented by certificates delivered to the Depositary will be deemed to have been tendered unless otherwise indicated.

5.    Signatures on Letter of Transmittal, Stock Powers and Endorsements.    If this Letter of Transmittal is signed by the registered holder(s) of the Shares tendered herewith, the signature(s) must correspond with the name(s) as written on the face of the certificate(s) without any change whatsoever.

If any of the Shares tendered herewith are owned of record by two or more joint owners, all such owners must sign this Letter of Transmittal.

If any tendered Shares are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate copies of this Letter of Transmittal as there are different registrations of certificates.

If this Letter of Transmittal or any certificates or stock powers are signed by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing and proper evidence, satisfactory to Acquisition Sub, of their authority so to act must be submitted.

When this Letter of Transmittal is signed by the registered owner(s) of the Shares tendered herewith, no endorsements of certificates or separate stock powers are required unless payment is to be made to, or certificates for Shares not tendered or accepted for payment are to be issued to, a person other than the registered owner(s). Signatures on such certificates or stock powers must be guaranteed by an Eligible Institution.

If this Letter of Transmittal is signed by a person other than the registered owner(s) of certificate(s) listed on the cover page, such certificate(s) must be endorsed or accompanied by appropriate stock powers, in either case signed exactly as the name or names of the registered owner(s) appear on such certificate(s) and the signatures on such certificates or stock powers must be guaranteed by an Eligible Institution.

6.    Stock Transfer Taxes.    Except as otherwise provided in this Instruction 6, Acquisition Sub will pay any stock transfer taxes with respect to the transfer and sale of Shares to it or its order in the Offer. If, however, payment of the

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purchase price is to be made to, or if certificates for Shares not to be tendered or not accepted for payment are to be registered in the name of, any person(s) other than the registered owner(s), or if tendered certificate(s) are registered in the name of any person(s) other than the person(s) signing this Letter of Transmittal, the amount of any stock transfer taxes (whether imposed on the registered owner(s) or such person(s)) payable on account of the transfer to such person(s) will be deducted from the purchase price unless satisfactory evidence of the payment of such taxes, or exemption therefrom, is submitted.

Except as provided in this Instruction 6, it will not be necessary for transfer tax stamps to be affixed to the certificate(s) listed in this Letter of Transmittal.

7.    Special Payment and Delivery Instructions.    If a check is to be issued in the name of, and/or certificates for Shares not accepted for payment are to be returned to, a person other than the person signing this Letter of Transmittal, or if a check is to be sent and/or such certificates are to be returned to a person other than the person signing this Letter of Transmittal or to an address other than that shown above, the appropriate boxes on this Letter of Transmittal must be completed.

8.    Waiver of Conditions.    Subject to the terms and conditions of the Merger Agreement (as defined in the Offer to Purchase), Acquisition Sub reserves the absolute right in its sole discretion to waive any of the specified conditions (other than the Minimum Condition (as defined in Section 2 (Procedures for Tendering Shares of Semitool Common Stock in the Offer) of the Offer to Purchase) which may be waived by Acquisition Sub only with the prior written consent of Semitool) of the Offer, in whole or in part, in the case of any Shares to be tendered herewith.

9.    Backup Withholding.    In order to avoid backup withholding of United States federal income tax at a rate of 28% on payments of cash in the Offer, a shareholder tendering Shares in the Offer who is a United States citizen, a United States resident alien or a business entity organized within the United States must, unless an exemption applies, provide the Depositary with such shareholder’s correct taxpayer identification number (“TIN”) on Substitute Form W-9 included below in this Letter of Transmittal and certify under penalties of perjury that such TIN is correct and that such shareholder is not subject to backup withholding. If a shareholder fails to provide a correct TIN, the shareholder may be subject to penalties imposed by the Internal Revenue Service (the “IRS”) may impose a penalty on such shareholder.

Backup withholding is not an additional tax. Rather, the amount of the backup withholding can be credited against the Federal income tax liability of the person subject to the backup withholding, provided that the required information is given to the IRS. If backup withholding results in an overpayment of tax, a refund can be obtained by the shareholder upon filing an income tax return.

The shareholder is required to give the Depositary the TIN (i.e., social security number or employer identification number) of the shareholder of the Shares tendered herewith. If such Shares are held in more than one name, or are not in the name of the actual owner(s), consult the enclosed Instructions for Certification of Taxpayer Identification Number on Substitute Form W-9 for additional guidance on which number to report.

The box in Part 3 of the Substitute Form W-9 may be checked if the tendering shareholder has not been issued a TIN and has applied for a TIN or intends to apply for a TIN in the near future. If the box in Part 3 is checked, the shareholder or other payee must also complete the Certificate of Awaiting Taxpayer Identification Number below in order to avoid backup withholding. Notwithstanding that the box in Part 3 is checked and the Certificate of Awaiting Taxpayer Identification Number is completed, the Depositary will withhold 28% on all payments made prior to the time a properly certified TIN is provided to the Depositary. However, such amounts will be refunded to such shareholder if a TIN is provided to the Depositary within 60 days.

Certain shareholders (including, among others, all corporations and certain foreign individuals and entities) are exempt from backup withholding. Tendering shareholders who are individuals and not United States citizens or United States resident aliens or are business entities organized outside the United States should complete and sign the main signature form and a Form W-8BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding (or other appropriate Form W-8), copies of which may be obtained from the Depositary, in order to avoid backup withholding.

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Shareholders that are not described in this section or otherwise have questions about whether they should execute a Form W-8 or Substitute Form W-9 should consult their tax advisors. Shareholders should also consult their tax advisors about qualifying for exemption from backup withholding and the procedure for obtaining such exemption.

See the enclosed Instructions for Certification of Taxpayer Identification Number on Substitute Form W-9 for more instructions.

10.    Lost, Destroyed or Stolen Certificates.    If any certificate representing Shares has been lost, destroyed or stolen, the shareholder should promptly notify the transfer agent for Semitool common stock, Registrar and Transfer Company, at 1-800-866-1340. The shareholder will then be instructed by Registrar and Transfer Company as to the steps that must be taken in order to replace such certificate. This Letter of Transmittal and related documents cannot be processed until the procedures for replacing lost or destroyed certificates have been completed.

IMPORTANT: IN ORDER TO TENDER YOUR SHARES, THIS LETTER OF TRANSMITTAL (OR A MANUALLY SIGNED PHOTOCOPY OF IT) TOGETHER WITH ANY SIGNATURE GUARANTEES, OR IN THE CASE OF A BOOK-ENTRY TRANSFER, AN AGENT’S MESSAGE, AND ANY OTHER REQUIRED DOCUMENTS, MUST BE RECEIVED BY THE DEPOSITARY PRIOR TO THE EXPIRATION DATE AND EITHER CERTIFICATES FOR TENDERED SHARES MUST BE RECEIVED BY THE DEPOSITARY OR SHARES MUST BE DELIVERED PURSUANT TO THE PROCEDURES FOR BOOK-ENTRY TRANSFER DESCRIBED IN SECTION 2 OF THE OFFER TO PURCHASE, IN EACH CASE PRIOR TO THE EXPIRATION DATE, OR THE TENDERING SHAREHOLDER MUST COMPLY WITH THE PROCEDURES FOR GUARANTEED DELIVERY DESCRIBED IN SECTION 2 OF THE OFFER TO PURCHASE.

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PAYERS NAME: BNY MELLON SHAREOWNER SERVICES
Name:
Please check the appropriate box indicating your status: ¨  Individual/Sole proprietor    ¨  Corporation    ¨  Partnership    ¨  Other    ¨  Exempt from backup withholding
Address (number, street, and apt. or suite no.)
City, State, and ZIP code
SUBSTITUTE FormW-9 Department of the Treasury, Internal Revenue Service Payers Request for Taxpayer Identification Number (TIN)	Part 1 PLEASE PROVIDE YOUR TIN IN THE BOX AT THE RIGHT AND CERTIFY BY SIGNING AND DATING BELOW.	Social Security Number(s) OR Employer Identification Number
	Part 2 Certification. Under penalties of perjury, I certify that: (1) The number shown on this form is my correct Taxpayer Identification Number (or I am waiting for a number to be issued for me) and (2) I am not subject to backup withholding because: (a) I am exempt from backup withholding or (b) I have not been notified by the Internal Revenue Service (the “IRS”) that I am subject to backup withholding as a result of a failure to report all interest or dividends or (c) the IRS has notified me that I am no longer subject to backup withholding. (3) I am a U.S. person (including a U.S. nonresident alien).
	Certification Instructions You must cross out item (2) in Part 2 above if you have been notified by the IRS that you are subject to backup withholding because of underreporting interest or dividends on your tax returns. However, if after being notified by the IRS that you are subject to backup withholding, you received another notification from the IRS stating that you are no longer subject to backup withholding, do not cross out such item (2). If you are exempt from backup withholding, check the box in Part 4 above.	Part 3 Awaiting TIN  ¨ Part 4 Exempt Payee  ¨
	Signature:	Date:

NOTE: Failure to complete and return this Substitute Form W-9 may result in backup withholding at a rate of 28% on any payments made to you in the Offer. Please review the enclosed Instructions for Certification of Taxpayer Identification Number on Substitute Form W-9 for additional information.

You must complete the following certificate if you checked the box in part 3 of Substitute Form W-9.

CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (a) I have mailed or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or Social Security Administration Office or (b) I intend to mail or deliver an application in the near future. I understand that if I do not provide a taxpayer identification number to the Depositary, 28% of all reportable payments made to me will be withheld, but will be refunded to me if I provide a certified taxpayer identification number within 60 days.

Signature:                                                                                                Date:                                                                                          , 2009

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Manually signed photocopies of this Letter of Transmittal will be accepted. This Letter of Transmittal, certificates for Shares and any other required documents should be sent or delivered by each shareholder or such shareholder’s broker, dealer, bank, trust company or other nominee to the Depositary at one of its addresses listed below.

BNY MELLON SHAREOWNER SERVICES

If delivering by mail:	By Overnight Courier:	If delivering by hand or courier:
BNY Mellon Shareowner Services Corporate Action Division P.O. Box 3301 South Hackensack, NJ 07606	BNY Mellon Shareowner Services Corporate Action Division 27th Floor 480 Washington Blvd. Jersey City, NJ 07310	BNY Mellon Shareowner Services Corporate Action Division 27th Floor 480 Washington Blvd. Jersey City, NJ 07310
	By Facsimile Transmission: (For Eligible Institutions Only) (201) 680-4626

To Confirm Facsimile Transmissions:

(201) 680-4860

(For Confirmation Only)

Questions regarding the Offer, and requests for assistance in connection with the Offer, may be directed to the Information Agent at its address and telephone number listed below. Additional copies of the Offer to Purchase, this Letter of Transmittal, the Notice of Guaranteed Delivery or any other materials related to the Offer may be obtained from the Information Agent and will be furnished promptly free of charge. You may also contact your broker, dealer, bank, trust company or other nominee for assistance concerning the Offer.

The Information Agent for the Offer is:

501 Madison Avenue, 20^th Floor

New York, New York 10022

Shareholders May Call Toll Free: (877) 717-3936

Banks and Brokers May Call Collect: (212) 750-5833

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