除了JESD74A，还有什么标准？
EarlyLifeFailureRateCalculationProcedureforSemiconductorComponents
JESD74A
(RevisionofJESD74,April2000)
Introductionii
1Scope1
2Referencedocuments1
3Termsanddefinitions2
4Generalrequirements4
4.1Testsamples4
4.2Testconditions4
4.3Testdurations4
4.4Failureanalysis4
5CalculationELFR5
5.1Exponentialdistribution(constantfailurerate)8
5.1.1Exponentialdistribution,singleELFtest8
5.1.1.1Exponentialdistribution–1failuremechanism,singleELFtest9
5.1.1.2Exponentialdistribution–2failuremechanisms,singleELFtest9
5.1.2Exponentialdistribution–1failuremechanism,multipleELFtests9
5.1.2.1Exponentialdistribution–1failuremechanism,multipleELFtests10
5.1.3Exponentialdistribution–multiplefailuremechanisms,multipleELFtests10
5.1.3.1Exponentialdistribution–2failuremechanisms,multipleELFtests10
5.2Decreasingfailurerate10
5.2.1Decreasingfailurerate,singleELFtest11
5.2.1.1Decreasingfailurerate–1failuremechanism,singleELFtest13
5.2.1.2Decreasingfailurerate–2failuremechanisms,singleELFtest14
5.2.2Decreasingfailurerate–1failuremechanism,multipleELFtests14
5.2.2.1Decreasingfailurerate–1failuremechanism,multipleELFtests15
5.2.3Decreasingfailurerate–multiplefailuremechanisms,multipleELFtests15
5.2.3.1Decreasingfailurerate–2failuremechanisms,multipleELFtests15
5.3AlternateELFRcalculationformultiplefailuremechanisms16
AnnexA–Exampleusingtheexponentialdistributionwith1failuremechanismandasingleELFtest17
AnnexB–Exampleusingtheexponentialdistributionwith2failuremechanismsandasingleELFtest18
AnnexC–Exampleusingtheexponentialdistributionwith1failuremechanismand3ELFtests20
AnnexD–Exampleusingtheexponentialdistributionwith2failuremechanismsand3ELFtests21
AnnexE–ExampleusingaWeibulldistributionwithdecreasingratewith1failuremechanismandasingleELFtest23
AnnexF–ExampleusingtheWeibulldistributionwith2failuremechanismsandasingleELFtest24
AnnexG–ExampleusingaWeibulldistributionwithdecreasingratedistributionwith1failuremechanismand3ELFtests26
AnnexH–ExampleusingaWeibulldistributionwithdecreasingratewith2failuremechanismsand3ELFtests27
AnnexJ–ChiSquarevaluestable29
AnnexK–(informative)DifferencesbetweenJESD74AandJESD7430
Figures
5.1Reliabilitybathtubcurve5
5.2Cumulativefailuresversusstresstime11
Tables
J.1Squaredistribution,χ2valuesatvariousconfidencelevels29
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