SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 23, 1997 ---------------------- Tencor Instruments - ------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) California 0-20007 94-2464767 ---------------------------------- -------------- ---------------------- (State or other jurisdiction of (Commission (IRS Employer Incorporation or organization) File Number) Identification Number) One Technology Drive Milpitas, California 95035 ----------------------- -------- (Address of principal executive offices) (Zip Code) Registrant's telephone no., including area code: (408) 970-9500 -------------- (Former name or former address, if changed since last report) Item 5. OTHER EVENTS On April 23, 1997, Tencor Instruments, a California corporation ("Tencor") announced operating results for the quarter ended March 31, 1997. A copy of the press release issued by Tencor regarding its first quarter operating results is filed herewith as Exhibit 99.1 and is incorporated by reference herein. Item 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits 99.1 Press Release dated April 23, 1997. -2- SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, hereunto duly authorized. TENCOR INSTRUMENTS Date: April 25, 1997 By: /S/ FREDERICK A. BALL -------------------------- Frederick A. Ball Vice President, Controller & Secretary -3-