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        <link:definition>995327 - Disclosure - FAIR VALUE MEASUREMENTS</link:definition>
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        <link:definition>996000 - Disclosure - Accounting Policies, by Policy (Policies)</link:definition>
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        <link:definition>996001 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables)</link:definition>
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        <link:definition>996002 - Disclosure - OTHER CURRENT ASSETS (Tables)</link:definition>
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        <link:definition>996003 - Disclosure - INVENTORIES (Tables)</link:definition>
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        <link:definition>996005 - Disclosure - PDMCX JOINT VENTURE (Tables)</link:definition>
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        <link:definition>996006 - Disclosure - ACCRUED LIABILITIES (Tables)</link:definition>
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        <link:definition>996007 - Disclosure - DEBT (Tables)</link:definition>
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        <link:definition>996012 - Disclosure - INCOME TAXES (Tables)</link:definition>
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        <link:definition>996013 - Disclosure - EARNINGS PER SHARE (Tables)</link:definition>
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        <link:definition>996014 - Disclosure - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT (Tables)</link:definition>
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        <link:definition>996015 - Disclosure - SEGMENT REPORTING (Tables)</link:definition>
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        <link:definition>996016 - Disclosure - RISKS AND CONCENTRATIONS (Tables)</link:definition>
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        <link:definition>996017 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</link:definition>
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        <link:definition>996018 - Disclosure - SHARE REPURCHASE PROGRAM (Tables)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>996020 - Disclosure - ACCOUNTS RECEIVABLE, NET - Accounts Receivable, Net (Details)</link:definition>
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        <link:definition>996022 - Disclosure - OTHER CURRENT ASSETS - Other Current Assets (Details)</link:definition>
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  <xs:element name="NetSettlementsOfRestrictedStockAwards" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_NetSettlementsOfRestrictedStockAwards"/>
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  <xs:element name="AccountingPoliciesbyPolicyPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="plab_AccountingPoliciesbyPolicyPoliciesTable"/>
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  <xs:element name="DepreciationAndAmortizationExpenseTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_DepreciationAndAmortizationExpenseTableTextBlock"/>
  <xs:element name="InformationOnOperatingAndFinanceLeasesIncludedInConsolidatedBalanceSheetsTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_InformationOnOperatingAndFinanceLeasesIncludedInConsolidatedBalanceSheetsTableTextBlock"/>
  <xs:element name="FutureLeasePaymentsUnderNoncancelableOperatingAndFinanceLeasesTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_FutureLeasePaymentsUnderNoncancelableOperatingAndFinanceLeasesTableTextBlock"/>
  <xs:element name="LesseeOperatingLeaseWeightedAverageRemainingLeaseTermDiscountRateTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_LesseeOperatingLeaseWeightedAverageRemainingLeaseTermDiscountRateTextBlock"/>
  <xs:element name="CashAndNonCashInformationRelatedToLeasesTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_CashAndNonCashInformationRelatedToLeasesTextBlock"/>
  <xs:element name="ScheduleOfUnrecognizedTaxBenefitsTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_ScheduleOfUnrecognizedTaxBenefitsTableTextBlock"/>
  <xs:element name="ScheduleOfIncomeTaxesPaidAndRefundsTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_ScheduleOfIncomeTaxesPaidAndRefundsTableTextBlock"/>
  <xs:element name="PrepaidAndRefundableIncomeTaxes" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="plab_PrepaidAndRefundableIncomeTaxes"/>
  <xs:element name="AccruedPropertyPlantAndEquipmentCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_AccruedPropertyPlantAndEquipmentCurrent"/>
  <xs:element name="AccruedServicesContractedCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_AccruedServicesContractedCurrent"/>
  <xs:element name="AccruedOperatingLeasesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_AccruedOperatingLeasesCurrent"/>
  <xs:element name="UnrecognizedTaxBenefitNoncurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_UnrecognizedTaxBenefitNoncurrent"/>
  <xs:element name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour"/>
  <xs:element name="FinanceLeaseLiabilityPaymentsDueAfterYearFour" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_FinanceLeaseLiabilityPaymentsDueAfterYearFour"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="plab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="plab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsForfeituresAndAdjustmentsInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsForfeituresAndAdjustmentsInPeriod"/>
  <xs:element name="IncomeTaxReconciliationLeaseBuyout" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="plab_IncomeTaxReconciliationLeaseBuyout"/>
  <xs:element name="DeferredTaxAssetsLeaseLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="plab_DeferredTaxAssetsLeaseLiability"/>
  <xs:element name="DeferredTaxLiabilitiesRightOfUseAsset" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_DeferredTaxLiabilitiesRightOfUseAsset"/>
  <xs:element name="UnrecognizedTaxBenefitsIncludingInterestAndPenalties" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="plab_UnrecognizedTaxBenefitsIncludingInterestAndPenalties"/>
  <xs:element name="NumberOfManufacturingFacilities" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_NumberOfManufacturingFacilities"/>
  <xs:element name="PercentageOfOwnershipInterestInSubsidiaries" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="plab_PercentageOfOwnershipInterestInSubsidiaries"/>
  <xs:element name="CustomerOrdersExpectedTimingOfSatisfactionPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_CustomerOrdersExpectedTimingOfSatisfactionPeriod"/>
  <xs:element name="PeriodOfWarranty" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_PeriodOfWarranty"/>
  <xs:element name="IncreaseDecreaseInPropertyAndEquipmentNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="plab_IncreaseDecreaseInPropertyAndEquipmentNet"/>
  <xs:element name="GovernmentGrantForAcquisitionOfPropertyPlantAndEquipment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="plab_GovernmentGrantForAcquisitionOfPropertyPlantAndEquipment"/>
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  <xs:element name="MinimumAgeOfEmployeesToComeUnderRetirementPlan" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_MinimumAgeOfEmployeesToComeUnderRetirementPlan"/>
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  <xs:element name="FlatPanelDisplaysMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_FlatPanelDisplaysMember"/>
  <xs:element name="FollowedByThirtySixMonthsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_FollowedByThirtySixMonthsMember"/>
  <xs:element name="FollowingNineMonthsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_FollowingNineMonthsMember"/>
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  <xs:element name="PDMCXMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_PDMCXMember"/>
  <xs:element name="PhotronicsAndDNPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_PhotronicsAndDNPMember"/>
  <xs:element name="September2020AnnouncedProgramMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_September2020AnnouncedProgramMember"/>
  <xs:element name="Seven2MillionFinanceLeaseMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_Seven2MillionFinanceLeaseMember"/>
  <xs:element name="ShareRepurchaseProgramsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_ShareRepurchaseProgramsMember"/>
  <xs:element name="TaxRateReconciliationMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_TaxRateReconciliationMember"/>
  <xs:element name="Three55MillionFinanceLeaseMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_Three55MillionFinanceLeaseMember"/>
  <xs:element name="Two025EquityIncentiveCompensationPlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_Two025EquityIncentiveCompensationPlanMember"/>
  <xs:element name="WorkingCapitalLoanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_WorkingCapitalLoanMember"/>
  <xs:element name="EarningPerShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_EarningPerShareAbstract"/>
  <xs:element name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="plab_SignificantAccountingPoliciesLineItems"/>
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