<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2022v5.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2023-08-16T10:43:02-05:00</ReturnTs>
    <TaxPeriodEndDt>2022-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>141624930</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>TEAL BECKER &amp; CHIARAMONTE CPAS PC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>7 WASHINGTON SQUARE</AddressLine1Txt>
        <CityNm>ALBANY</CityNm>
        <StateAbbreviationCd>NY</StateAbbreviationCd>
        <ZIPCd>12205</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2022-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>770164704</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>SEMATECH INC</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>SEMA</BusinessNameControlTxt>
      <PhoneNum>5186491000</PhoneNum>
      <USAddress>
        <AddressLine1Txt>257 FULLER RD 2200</AddressLine1Txt>
        <CityNm>ALBANY</CityNm>
        <StateAbbreviationCd>NY</StateAbbreviationCd>
        <ZIPCd>122033652</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>PAUL KELLY</PersonNm>
      <PersonTitleTxt>EXECUTIVE IN CHARGE</PersonTitleTxt>
      <PhoneNum>5186491000</PhoneNum>
      <SignatureDt>2023-08-08</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>PAUL</PersonFirstNm>
        <PersonLastNm>KELLY</PersonLastNm>
      </PersonFullName>
      <SSN>XXX-XX-XXXX</SSN>
    </SigningOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>0</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>PAULA PIERCE CPA</PreparerPersonNm>
      <PTIN>P00412839</PTIN>
      <PhoneNum>5184566663</PhoneNum>
      <PreparationDt>2023-08-08</PreparationDt>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2022</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001 RetDoc2278000001">
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>WWW.SEMATECH.ORG</WebsiteAddressTxt>
      <Organization501cInd organization501cTypeTxt="6">X</Organization501cInd>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>351</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <OtherRevenueTotalAmt>351</OtherRevenueTotalAmt>
      <TotalRevenueAmt>351</TotalRevenueAmt>
      <FeesAndOtherPymtToIndCntrctAmt>2903</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>3091</OtherExpensesTotalAmt>
      <TotalExpensesAmt>5994</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-5643</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>250113</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>244470</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>250113</BOYAmt>
        <EOYAmt>244470</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>250113</BOYAmt>
        <EOYAmt>244470</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>250113</BOYAmt>
        <EOYAmt>244470</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>TO ADVANCE THE STATE OF THE ART OF SEMICONDUCTOR CHIP MANUFACTURING AND RELATED TECHNOLOGIES BY FOSTERING, PERFORMING AND SPONSORING RESEARCH AND DEVELOPMENT AT MULTIPLE LEVELS OF THE SEMICONDUCTOR AND NANOTECHNOLOGY SUPPLY CHAIN.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>SEMATECH CONTINUES TO EVALUATE NEW OPPORTUNITIES FOR OUR MEMBERS, BUT IN THE MEANTIME CONTINUES TO WIND DOWN AFFAIRS TO REDUCE COSTS WITH NO FUNDS INCOMING.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>0</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>PAUL KELLY</PersonNm>
        <TitleTxt>EXECUTIVE IN CHARGE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN IACAPONI</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>NATE CODY</PersonNm>
        <TitleTxt>BOARD MEMBER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>PAUL KELLY</PersonNm>
        <USAddress>
          <AddressLine1Txt>257 FULLER ROAD NO 2200</AddressLine1Txt>
          <CityNm>ALBANY</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>122033652</ZIPCd>
        </USAddress>
        <PhoneNum>5186491101</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
    </IRS990EZ>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 8 - OTHER REVENUE</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: REFUND. AMOUNT: 351.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16 - OTHER EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: COMPUTER AND INTERNET CHARGES. AMOUNT: 726. DESCRIPTION: STORAGE. AMOUNT: 2,365. TOTAL TO FORM 990-EZ, LINE 16: 3,091.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <TransferPrsnlBnftContractsDecl documentId="RetDoc2278000001">
      <DeclarationDesc>THE ORGANIZATION DID NOT, DURING THE YEAR, RECEIVE ANY FUNDS, DIRECTLY,OR INDIRECTLY, TO PAY PREMIUMS ON A PERSONAL BENEFIT CONTRACT.THE ORGANIZATION, DID NOT, DURING THE YEAR, PAY ANY PREMIUMS, DIRECTLY,OR INDIRECTLY, ON A PERSONAL BENEFIT CONTRACT.</DeclarationDesc>
    </TransferPrsnlBnftContractsDecl>
  </ReturnData>
</Return>
