-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, Q+gLQilEX3bTjtdEb83yyY3TcA8oye9eQLfIxUGSU8AYysxaT3NnoE9WtnIe9TUn jkoMguvvWI3y77YTpLUqpw== 0000354204-00-000869.txt : 20000204 0000354204-00-000869.hdr.sgml : 20000204 ACCESSION NUMBER: 0000354204-00-000869 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20000203 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MATTSON TECHNOLOGY INC CENTRAL INDEX KEY: 0000928421 STANDARD INDUSTRIAL CLASSIFICATION: SPECIAL INDUSTRY MACHINERY, NEC [3559] IRS NUMBER: 770208119 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: SEC FILE NUMBER: 005-46189 FILM NUMBER: 521938 BUSINESS ADDRESS: STREET 1: 3550 WEST WARREN AVE CITY: FREMONT STATE: CA ZIP: 94538 BUSINESS PHONE: 5106575900 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: DIMENSIONAL FUND ADVISORS INC CENTRAL INDEX KEY: 0000354204 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 22370029 STATE OF INCORPORATION: IL FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 1299 OCEAN AVE STREET 2: 11TH FLOOR CITY: SANTA MONICA STATE: CA ZIP: 90401 BUSINESS PHONE: 3103958005 MAIL ADDRESS: STREET 1: 1299 OCEAN AVENUE STREET 2: 11TH FLOOR CITY: SANTA MONICA STATE: CA ZIP: 90401 SC 13G 1 1999 SCHEDULE 13G - MATTSON TECHNOLOGY I - ------------------------------------------------------------------- Page 1 of 4 SCHEDULE 13G (12/31/99) MATTSON TECHNOLOGY I Cusip # 577223100 Amendment - -------------------------------------------------------------------- Page 2 of 4 Cusip # 577223100 Item 1: REPORTING PERSONS Dimensional Fund Advisors Inc. (Tax ID: 22-2370029) Item 4: CITIZENSHIP Delaware Corporation Item 5: SOLE VOTING POWER 830,400 ** see Note 1 ** Item 6: SHARED VOTING POWER -- None Item 7: SOLE DISPOSITIVE POWER -- 830,400 ** see Note 1 ** Item 8: SHARED DISPOSITIVE POWER -- 0 Item 9: AGGREGATE AMOUNT BENEFICIALLY OWNED -- 830,400 ** see Note 1 ** Item 11: PERCENT OF CLASS REPRESENTED BY LINE 9 -- 5.36 Item 12: TYPE OF REPORTING PERSON -- IA - ----------------------------------------------------------------------- Page 3 of 4 ITEM 1(A). NAME OF ISSUER MATTSON TECHNOLOGY I ITEM 1(B). ADDRESS OF ISSUER 3550 West Warren Avenue Fremont, CA 94538 ITEM 2(A). NAME OF PERSON FILING Dimensional Fund Advisors ITEM 2(B). ADDRESS OF PRINCIPAL BUSINESS OFFICE 1299 Ocean Avenue, 11th Floor, Santa Monica, CA 90401 ITEM 2(C). CITIZENSHIP A Delaware Corporation ITEM 2(D). TITLE OF CLASS OF SECURITIES Common Stock ITEM 2(E). CUSIP NUMBER 577223100 ITEM 3. This statement is filed pursuant to Rule 13d-1 (b), or 13d-2 (b) and the person filing is an investment advisor registered under section 203 of the Investment Advisors Act of 1940. - --------------------------------------------------------------------- Page 4 of 4 ITEM 4. OWNERSHIP ITEM 4(a). AMOUNT BENEFICIALLY OWNED 830,400 ** see Note 1 ** ITEM 4(b). PERCENT OF CLASS 5.36 ITEM 4(c). NUMBER OF SHARE AS TO WHICH SUCH PERSON HAS: (i). SOLE POWER TO VOTE OR DIRECT THE VOTE -- 830,400 ** see Note 1 ** (ii). SHARED POWER TO VOTE OR TO DIRECT THE VOTE -- None (iii). SOLE POWER TO DISPOSE OR TO DIRECT DISPOSITION OF -- 830,400 ** see Note 1 ** (iv). SHARE POWER TO DISPOSE OR TO DIRECT DISPOSISTION OF -- None ** Note 1 ** Dimensional Fund Advisors Inc. ("Dimensional"), an investment advisor registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to four investment companies registered under the Investment Company Act of 1940, and serves as investment manager to certain other commingled group trusts and separate accounts. These investment companies, trusts and accounts are the "Funds". In its role as investment adviser or manager, Dimensional possesses voting and/or investment power over the securities of the Issuer described in this schedule that are owned the Funds. All securities reported in this schedule are owned by the Funds. Dimensional disclaims beneficial ownership of such securities. ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of 12/31/99 the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [ ] ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON All Securities reported in this schedule are onwed by advisory clients of Dimensional Fund Advisors Inc., no one of which to the knowledge of Dimensional Fund Advisors Inc. owns more than 5% of the class. Dimensional Fund Advisors Inc disclaims beneficial ownership of all such securities. ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY: Not Applicable ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP Not Applicable ITEM 9. NOTICE OF DISSOLUTION OF GROUP Not Applicable ITEM 10. CERTIFICATION By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete are correct. Signature Friday, February 4, 2000 Michael T. Scardina Vice President and Chief Finacial Officer -----END PRIVACY-ENHANCED MESSAGE-----