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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 oHBrrQLv+8mybmnL89mDJA==

<SEC-DOCUMENT>0000908737-05-000370.txt : 20050520
<SEC-HEADER>0000908737-05-000370.hdr.sgml : 20050520
<ACCEPTANCE-DATETIME>20050520174940
ACCESSION NUMBER:		0000908737-05-000370
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050518
FILED AS OF DATE:		20050520
DATE AS OF CHANGE:		20050520

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADE CORP
		CENTRAL INDEX KEY:			0000884498
		STANDARD INDUSTRIAL CLASSIFICATION:	INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS [3825]
		IRS NUMBER:				042441829
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0430

	BUSINESS ADDRESS:	
		STREET 1:		80 WILSON WAY
		CITY:			WESTWOOD
		STATE:			MA
		ZIP:			02090
		BUSINESS PHONE:		6174673500

	MAIL ADDRESS:	
		STREET 1:		77 ROWE ST
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02166

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CLAY LANDON T
		CENTRAL INDEX KEY:			0001008274

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26714
		FILM NUMBER:		05849295

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		6174500150

	MAIL ADDRESS:	
		STREET 1:		C/O EAST HILL MANAGEMENT CO
		STREET 2:		200 CLARENDON ST STE 6000
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116-5028
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>landonclayform4_may18ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000884498</issuerCik>
        <issuerName>ADE CORP</issuerName>
        <issuerTradingSymbol>ADEX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001008274</rptOwnerCik>
            <rptOwnerName>CLAY LANDON T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>80 WILSON WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WESTWOOD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02090</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>20.74</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-05-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-05-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The options will vest in equal installments quarterly over a five year period.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Landon T. Clay</signatureName>
        <signatureDate>2005-05-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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