-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MRcBcphTtJ0QEM1i/Ewwb9EXXLKcGY57DlohI/spU2SHriFuixCNgwtOkF5sNc44
 XN2NEZB31W8wcMDU5BR8TQ==

<SEC-DOCUMENT>0001209191-03-018023.txt : 20030820
<SEC-HEADER>0001209191-03-018023.hdr.sgml : 20030820
<ACCEPTANCE-DATETIME>20030820150120
ACCESSION NUMBER:		0001209191-03-018023
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030815
FILED AS OF DATE:		20030820

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LUCAS DONALD L
		CENTRAL INDEX KEY:			0001181474

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31311
		FILM NUMBER:		03857914

	BUSINESS ADDRESS:	
		STREET 1:		2655 SEALY AVE.
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95134
		BUSINESS PHONE:		4089431234

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PDF SOLUTIONS INC
		CENTRAL INDEX KEY:			0001120914
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		IRS NUMBER:				251701361
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		333 WEST SAN CARLOS STREET
		STREET 2:		SUITE 700
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110
		BUSINESS PHONE:		4082807900

	MAIL ADDRESS:	
		STREET 1:		333 WEST SAN JOSE STREET
		STREET 2:		SUITE 700
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc4a.xml
<DESCRIPTION>FORM 4/A SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4/A</documentType><periodOfReport>2003-08-15</periodOfReport><dateOfOriginalSubmission>2003-08-18</dateOfOriginalSubmission><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001120914</issuerCik><issuerName>PDF SOLUTIONS INC</issuerName>        <issuerTradingSymbol>PDFS</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001181474</rptOwnerCik><rptOwnerName>LUCAS DONALD L</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>3000 SAND HILL ROAD</rptOwnerStreet1><rptOwnerStreet2>BUILDING #3, SUITE 210</rptOwnerStreet2><rptOwnerCity>MENLO PARK</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>94025</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwner
Relationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>3400</value><footnoteId id="F1" /></transactionShares><transactionPricePerShare><value>11.95</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>26600</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">900 shares
 were inadvertantly omitted from the reporting person's original Form 4 filed on 8/18/2003.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Donald L. Lucas</signatureName><signatureDate>2003-08-20</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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