-----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,
 IyCpO+XgWlBUP7B5DX7tgUJ3+I1OV4pMegrxB7jnqq9VLrCr5TetoxO94Dko5jwx
 sskY9fI6O0h/bQxZ+U2BHQ==

<SEC-DOCUMENT>0001488291-10-000001.txt : 20100331
<SEC-HEADER>0001488291-10-000001.hdr.sgml : 20100331
<ACCEPTANCE-DATETIME>20100331134708
ACCESSION NUMBER:		0001488291-10-000001
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20100331
DATE AS OF CHANGE:		20100331
EFFECTIVENESS DATE:		20100331

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IO SEMICONDUCTOR INC
		CENTRAL INDEX KEY:			0001488291
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-140087
		FILM NUMBER:		10717921

	BUSINESS ADDRESS:	
		STREET 1:		10309 PACIFIC CENTER COURT
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		858-345-4434

	MAIL ADDRESS:	
		STREET 1:		10309 PACIFIC CENTER COURT
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001488291</cik>
        <entityName>IO SEMICONDUCTOR INC</entityName>
        <issuerAddress>
            <street1>10309 PACIFIC CENTER COURT</street1>
            <city>SAN DIEGO</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>92121</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>858-345-4434</issuerPhoneNumber>
        <jurisdictionOfInc>CALIFORNIA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2008</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>MARK</firstName>
                <lastName>DRUCKER</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10309 PACIFIC CENTER COURT</street1>
                <city>SAN DIEGO</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>92121</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>STUART</firstName>
                <lastName>MOLIN</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10309 PACIFIC CENTER COURT</street1>
                <city>SAN DIEGO</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>92121</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>PETE</firstName>
                <lastName>FOWLER</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10309 PACIFIC CENTER COURT</street1>
                <city>SAN DIEGO</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>92121</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>ROB</firstName>
                <lastName>LOBBAN</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O IO SEMICONDUCTOR INCORPORATED</street1>
                <street2>10309 PACIFIC CENTER COURT</street2>
                <city>SAN DIEGO</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>92121</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Technology</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-03-16</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isDebtType>true</isDebtType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>14000000</totalOfferingAmount>
            <totalAmountSold>1000000</totalAmountSold>
            <totalRemaining>13000000</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>IO SEMICONDUCTOR INC</issuerName>
                <signatureName>/S/ MARK DRUCKER</signatureName>
                <nameOfSigner>MARK DRUCKER</nameOfSigner>
                <signatureTitle>CEO</signatureTitle>
                <signatureDate>2010-03-30</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----