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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Fl5PfAMrowsgcjgbDMdPr5ykDhicj9DzhCLz72D42lwLki0hdtUjeo0xBpnRBZru
 HUGGJEeRZEmpAhhlvScd9A==

<SEC-DOCUMENT>0000892712-10-000494.txt : 20100608
<SEC-HEADER>0000892712-10-000494.hdr.sgml : 20100608
<ACCEPTANCE-DATETIME>20100608172227
ACCESSION NUMBER:		0000892712-10-000494
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100604
FILED AS OF DATE:		20100608
DATE AS OF CHANGE:		20100608

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kopp LeRoy C
		CENTRAL INDEX KEY:			0001399913

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21074
		FILM NUMBER:		10885242

	MAIL ADDRESS:	
		STREET 1:		7701 FRANCE AVENUE SOUTH
		STREET 2:		SUITE 500
		CITY:			EDINA
		STATE:			MN
		ZIP:			55435

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUPERCONDUCTOR TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0000895665
		STANDARD INDUSTRIAL CLASSIFICATION:	RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT [3663]
		IRS NUMBER:				770158076
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		460 WARD DRIVE
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93111-2310
		BUSINESS PHONE:		8056904500

	MAIL ADDRESS:	
		STREET 1:		460 WARD DRIVE
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93111-2310
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-06-04</periodOfReport>

    <issuer>
        <issuerCik>0000895665</issuerCik>
        <issuerName>SUPERCONDUCTOR TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>SCON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001399913</rptOwnerCik>
            <rptOwnerName>Kopp LeRoy C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7701 FRANCE AVENUE SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>EDINA</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55435</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-06-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1200000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.32</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3249400</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>45000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The filing of this report shall not be deemed an admission that Mr. Kopp is the beneficial owner of these shares for purposes of Section 16 of the Exchange Act of 1934.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>John P. Flakne (pursuant to Power of Attorney previously filed)</signatureName>
        <signatureDate>2010-06-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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