<SEC-DOCUMENT>0001140361-15-039682.txt : 20151104
<SEC-HEADER>0001140361-15-039682.hdr.sgml : 20151104
<ACCEPTANCE-DATETIME>20151104163238
ACCESSION NUMBER:		0001140361-15-039682
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20151102
FILED AS OF DATE:		20151104
DATE AS OF CHANGE:		20151104

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 S CLARK DR
		CITY:			TEMPE
		STATE:			AZ
		ZIP:			85281
		BUSINESS PHONE:		6029675146

	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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PITON CAPITAL PARTNERS LLC
		CENTRAL INDEX KEY:			0001644342
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11412
		FILM NUMBER:		151197368

	BUSINESS ADDRESS:	
		STREET 1:		C/O KOKINO LLC
		STREET 2:		201 TRESSER BOULEVARD, 3RD FLOOR
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901
		BUSINESS PHONE:		(405) 936-6220

	MAIL ADDRESS:	
		STREET 1:		C/O NORTH BAY ASSOCIATES
		STREET 2:		14000 QUAIL SPRINGS PARKWAY, SUITE 2200
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73134
</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>2015-11-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001644342</rptOwnerCik>
            <rptOwnerName>PITON CAPITAL PARTNERS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NORTH BAY ASSOCIATES</rptOwnerStreet1>
            <rptOwnerStreet2>14000 QUAIL SPRINGS PARKWAY, SUITE 2200</rptOwnerStreet2>
            <rptOwnerCity>OKLAHOMA CITY</rptOwnerCity>
            <rptOwnerState>OK</rptOwnerState>
            <rptOwnerZipCode>73134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-11-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.15</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>600000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Piton Capital Partners LLC also reports beneficial ownership pursuant to Rule 13d of the Securities Exchange Act of 1934, as amended, pursuant to a Schedule 13G filed jointly by Leslie J. Schreyer, as Trustee under Trust Agreement dated December 23, 1989 FBO the issue of Jonathan D. Sackler, M3C Holdings LLC, Robert Averick, Piton Capital Partners LLC and OIH LLC with the Issuer on March 27, 2013, as amended by a Schedule 13G Amendment No. 1 filed with Issuer on January 3, 2014, a Schedule 13G Amendment No. 2 filed with the Issuer on February 17, 2015, a Schedule 13G Amendment No. 3 filed with the Issuer on February 25, 2015, a Schedule 13G Amendment No. 4 filed with the Issuer on June 12, 2015 and a Schedule 13G Amendment No. 5 filed with the Issuer on August 27, 2015.</footnote>
        <footnote id="F2">Represents shares held by Piton Capital Partners LLC.  Piton Capital Partners LLC is a Delaware limited liability company and investment entity that is a family client of Kokino LLC.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Douglas Kline, Chief Operating Officer of Kokino LLC, managing member of Piton Capital Management LLC, managing member of Piton Capital Partners LLC</signatureName>
        <signatureDate>2015-11-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
