<SEC-DOCUMENT>0000720500-18-000012-index.html : 20180126
<SEC-HEADER>0000720500-18-000012.hdr.sgml : 20180126
<ACCEPTANCE-DATETIME>20180126161627
ACCESSION NUMBER:		0000720500-18-000012
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20170930
FILED AS OF DATE:		20180126
DATE AS OF CHANGE:		20180126

FILER:

	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:		10-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11412
		FILM NUMBER:		18552053

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>asys-fiscal201710xka.htm
<DESCRIPTION>10-K/A FISCAL YEAR 2017
<TEXT>
Document 1 - file: asys-fiscal201710xka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.3
<SEQUENCE>2
<FILENAME>exhibit313.htm
<DESCRIPTION>EXHIBIT 31.3
<TEXT>
Document 2 - file: exhibit313.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.4
<SEQUENCE>3
<FILENAME>exhibit314.htm
<DESCRIPTION>EXHIBIT 31.4
<TEXT>
Document 3 - file: exhibit314.htm

</DOCUMENT>
</SEC-DOCUMENT>