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9,825,461,087,6410,916,000,008,00M.Chbat,S.Eberlin,M.Tochtermann,T.JuhnkehiT7500Multi-HaulDWDMsystemProductReliabilityUpdateProcesses,Status,andMeasuresSept15,2004InformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00SiemensReliabilityProcessOverviewOpticalComponents:•EDFA•VOA•GTC•PassivesNegotiationswithsuppliers:•Modeling•Fieldexperience•SuppliercomparisonElectricalComponents:•Resistors•Capacitors•Transistors•ICs•etc.Standards:•SN29500•IEC61709MechanicalComponents:•Connectors•Boards•etc.Standards:•SN29500•IEC61709CardFITRateFeedbackfromFieldReturnRateInformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00ProductReliabilityAssuranceProcessReference:Siemensstandard;inagreementwithinternationalstandardsIEC61709productdefinitionproductdevelopmentproductdeliveredrequirementsalignedwithtechnologybasisfailurerateallocationtoindividualcardsinvolvementofcomponentengineering&QAcardfailureratesonbasisofpartslistscomponentratingbydesignnew&criticalcomponentsspecificationnewcomponents&supplierauditsinproductionfailurecontrolfieldreturnanalysis&thresholdmonitoringconservativedatabasedonpredictedvaluesregularcomponentsupplierauditsInformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00ReliabilityControlandImprovementCross-functionalteamestablishedtoinstallfocusedprogramCloseinteractionwiththesupplierfordesign,technologyandprocessEarlyfailuremonitoringandfeedbackindevelopmentphaseExtendedtestingincludingtemperaturecyclinginproductionDetailedfailuremonitoringinproductionforearlycorrectiveactionInformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00PredictedFITratesvs.fieldreturnFITratesFieldreturnFITrateinherentlyis(!)lowerthanpredictedFITratesparepartsdon’tcontributetoFMAnon-installedequipmentatcertaincarrierslowchannelcountformanyyearstemperatureforFITestimationprobablyhigherthaninrealitymargin(e.g.,duetolowchannelcount,lowPMD,BOL)canmaskperformancedegradationInformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00FunctionalPartitionofOLIOpticalamplificationviaEDFAgainblockPumpdiodesMonitordiodesEDF-HeaterInternalGainSwitchOSCsplittingfunctionsasAdd/DropoftheOSCchannelusingwavelengthselectivecouplersSplittingofmonitorsignalsattheinputandoutputportandatintermediatemeasurementpointsSpectralshapingofthesignalusingaVOAforsettingtheEDFAtoanoptimizedoperatingpointGTCfortiltcompensationOpticalmonitorportsatinputandoutputforsignalsupervisionAPSDcircuitryGainControlandSupervision(DSP,on-boardprocessor)ElectricalcomponentsforcontrolandpowersupplyMechanicsincludingPCBInformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00012345678910111213OperatingtimeTinyearsFailureratelEarlyfailuresltotalWear-outfailureThebathtubcurve:FailurerateslviatimeTRandomfailureForthefieldreplaceableHW-unitsandtheircomponentsthefailureratelcouldbeonlypredictedbyrandomfailures!TheunitofthefailureratelisaFIT(FailureinTime;1FIT=1Failureper109h)!BathtubCurveInformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00IEC61709:Electroniccomponents–Reliability–Referenceconditionsforfailureratesandstressmodelsforconversion(nobasicfailurerates)RelationshipbetweenStandardsSIEMENSstandardSN29500/IEC61709comparedtoSR-332SR-332:ReliabilityPredictionProcedureforElectronicEquipmentSN29500:FailureratesofcomponentsExpectedvalues(ThisisinadditiontoIEC61709)a)ClimaticandmechanicalstressesperIEC721-3-3(seenextslide)multiplyingfactorsforenvironmentalconditionsb)QualityfactortestedcomponentsSN725004qualitylevelsknownc)TemperatureandelectricalstressbyreferenceconditionsIEC61709givenreferenceconditionsandconversion(SR-332)InformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00IEC61709:Electroniccomponents–Reliability–ReferenceconditionsforfailureratesandstressmodelsforconversionThefailurerateunderoperatingconditionsiscalculatedasfollows:TIUfRellWherelrefisthefailurerateunderreferenceconditions;Uisthevoltagedependencefactor;Iisthecurrentdependencefactor;Tisthetemperaturedependencefactor.TheseParameterarelistede.gintheSN29000library!ReferenceconditionsforclimaticandmechanicalstressesTypeofstressReferencecondition1)qamb,ref=40°CClimaticconditionsClass3K3asperIEC721-3-3MechanicalstressClass3M3asperIEC721-3-3Specialstresses3)NoneFordetailsofnotes(-1,-2,-3)pleaserefertoIEC61709Ambienttemperature2)Thedefinitions,referenceconditionsandconversionmodelsusedintheIEC61709fullycorrespondwiththealreadyexistingSIEMENSstandardSN29500method.Details:SIEMENSStandardSN29500andIEC61709InformationandCommunicationNetworks9,825,461,087,6410,916,000,008,00FITRatesofIndividualElectricalComponents(1)VoltagedependenceandCurrentdependenceUCUUeCrefC(())122UCUUUUeCrefC((()()))maxmax322or(1)(2)UOperatingvoltageinVUrefReferencevoltageinVUmaxRatedvoltageinVC1Constantin(1/V)C2C2,C3Constants(1)...DigitalCMOSFamilies,Contactors(2)...OthersICIIIIeCrefC((()()))maxmax455IOperatingcurrentinAIrefReferencecurrentinAImaxRatedcurrentinAC4,C5ConstantsInformationandCommunicationNet