<SEC-DOCUMENT>0001258897-19-001131-index.html : 20190208 <SEC-HEADER>0001258897-19-001131.hdr.sgml : 20190208 <ACCEPTANCE-DATETIME>20190208082217 ACCESSION NUMBER: 0001258897-19-001131 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20190208 DATE AS OF CHANGE: 20190208 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: AMTECH SYSTEMS INC CENTRAL INDEX KEY: 0000720500 STANDARD INDUSTRIAL CLASSIFICATION: SPECIAL INDUSTRY MACHINERY, NEC [3559] IRS NUMBER: 860411215 STATE OF INCORPORATION: AZ FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-39482 FILM NUMBER: 19577647 BUSINESS ADDRESS: STREET 1: 131 SOUTH CLARK DRIVE CITY: TEMPE STATE: AZ ZIP: 85281 BUSINESS PHONE: 4809675146 MAIL ADDRESS: STREET 1: 131 SOUTH CLARK DRIVE CITY: TEMPE STATE: AZ ZIP: 85281 FORMER COMPANY: FORMER CONFORMED NAME: QUARTZ ENGINEERING & MATERIALS INC DATE OF NAME CHANGE: 19870715 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: DIMENSIONAL FUND ADVISORS LP CENTRAL INDEX KEY: 0000354204 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 222370029 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 6300 BEE CAVE ROAD STREET 2: BUILDING ONE CITY: AUSTIN STATE: TX ZIP: 78746 BUSINESS PHONE: (512) 306-7400 MAIL ADDRESS: STREET 1: 6300 BEE CAVE ROAD STREET 2: BUILDING ONE CITY: AUSTIN STATE: TX ZIP: 78746 FORMER COMPANY: FORMER CONFORMED NAME: DIMENSIONAL FUND ADVISORS INC DATE OF NAME CHANGE: 19920929 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>dfs302.htm <DESCRIPTION>SCHEDULE 13G <TEXT> Document 1 - file: dfs302.htm
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