<SEC-DOCUMENT>0001567619-18-006851.txt : 20181121
<SEC-HEADER>0001567619-18-006851.hdr.sgml : 20181121
<ACCEPTANCE-DATETIME>20181121174049
ACCESSION NUMBER:		0001567619-18-006851
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20181120
FILED AS OF DATE:		20181121
DATE AS OF CHANGE:		20181121

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Schreyer Leslie J
		CENTRAL INDEX KEY:			0001416442

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11412
		FILM NUMBER:		181198907

	MAIL ADDRESS:	
		STREET 1:		C/O NORTON ROSE FULBRIGHT US LLP
		STREET 2:		1301 AVENUE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019

ISSUER:		

	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

	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>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-11-20</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000720500</issuerCik>
        <issuerName>AMTECH SYSTEMS INC</issuerName>
        <issuerTradingSymbol>ASYS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001416442</rptOwnerCik>
            <rptOwnerName>Schreyer Leslie J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NORTON ROSE FULBRIGHT US LLP</rptOwnerStreet1>
            <rptOwnerStreet2>1301 AVE OF AMERICAS</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On November 20, 2018, Leslie J. Schreyer resigned as Trustee under Trust Agreement dated December 23, 1989 FBO the issue of Jonathan D. Sackler (the &quot;Trust&quot;) and Cornice Fiduciary Management LLC was appointed successor trustee of the Trust (the &quot;Change in Trustee&quot;). Because Mr. Schreyer has resigned as trustee of the Trust, he is no longer a reporting person for the shares held by the Trust. No consideration was paid in connection with the Change in Trustee and, accordingly, the Trust continues to beneficially own the shares following the Change in Trustee.</footnote>
    </footnotes>

    <remarks>The Power of Attorney given by Leslie J. Schreyer, in his capacity as trustee under Trust Agreement dated December 23, 1989 FBO the issue of Jonathan D. Sackler, was previously filed with the U.S. Securities &amp; Exchange Commission on August 27, 2015 as Exhibit B to Amendment No. 5 to Schedule 13G filed by the Trust, M3C Holdings LLC, Robert Averick, Piton Capital Partners LLC and OIH LLC with respect to the Issuer and is hereby incorporated by reference.</remarks>

    <ownerSignature>
        <signatureName>/s/ Frank S. Vellucci, Attorney-in-Fact for Leslie J. Schreyer, in his capacity as trustee under Trust Agreement dated December 23, 1989 FBO the issue of Jonathan D. Sackler</signatureName>
        <signatureDate>2018-11-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
