JESD22-A104-C

JEDECSTANDARDTemperatureCyclingJESD22-A104C(RevisionofJESD22-A104-B)MAY2005JEDECSOLIDSTATETECHNOLOGYASSOCIATIONNOTICEJEDECstandardsandpublicationscontainmaterialthathasbeenprepared,reviewed,andapprovedthroughtheJEDECBoardofDirectorslevelandsubsequentlyreviewedandapprovedbytheJEDEClegalcounsel.JEDECstandardsandpublicationsaredesignedtoservethepublicinterestthrougheliminatingmisunderstandingsbetweenmanufacturersandpurchasers,facilitatinginterchangeabilityandimprovementofproducts,andassistingthepurchaserinselectingandobtainingwithminimumdelaytheproperproductforusebythoseotherthanJEDECmembers,whetherthestandardistobeusedeitherdomesticallyorinternationally.JEDECstandardsandpublicationsareadoptedwithoutregardtowhetherornottheiradoptionmayinvolvepatentsorarticles,materials,orprocesses.BysuchactionJEDECdoesnotassumeanyliabilitytoanypatentowner,nordoesitassumeanyobligationwhatevertopartiesadoptingtheJEDECstandardsorpublications.TheinformationincludedinJEDECstandardsandpublicationsrepresentsasoundapproachtoproductspecificationandapplication,principallyfromthesolidstatedevicemanufacturerviewpoint.WithintheJEDECorganizationthereareprocedureswherebyaJEDECstandardorpublicationmaybefurtherprocessedandultimatelybecomeanANSIstandard.Noclaimstobeinconformancewiththisstandardmaybemadeunlessallrequirementsstatedinthestandardaremet.Inquiries,comments,andsuggestionsrelativetothecontentofthisJEDECstandardorpublicationshouldbeaddressedtoJEDECattheaddressbelow,orcall(703)907-7559or©JEDECSolidStateTechnologyAssociation20052500WilsonBoulevardArlington,VA22201-3834Thisdocumentmaybedownloadedfreeofcharge;howeverJEDECretainsthecopyrightonthismaterial.Bydownloadingthisfiletheindividualagreesnottochargefororreselltheresultingmaterial.PRICE:PleaserefertothecurrentCatalogofJEDECEngineeringStandardsandPublicationsonlineat!DON’TVIOLATETHELAW!ThisdocumentiscopyrightedbyJEDECandmaynotbereproducedwithoutpermission.Organizationsmayobtainpermissiontoreproducealimitednumberofcopiesthroughenteringintoalicenseagreement.Forinformation,contact:JEDECSolidStateTechnologyAssociation2500WilsonBoulevardArlington,Virginia22201-3834orcall(703)907-7559JEDECStandardNo.22-A104CPage1TestMethodA104C(RevisionofTestMethodA104-B)TESTMETHODA104CTEMPERATURECYCLING(FromBoardBallotJCB-00-16,andJCB-05-82,formulatedunderthecognizanceoftheJC-14.1CommitteeonReliabilityTestmethodsforPackagedDevices.)1ScopeThisspecificationappliestosingle,dualandtriplechambertemperaturecyclingandcoverscomponentandsolderinterconnectiontesting.Insinglechambercycling,theloadisplacedinastationarychamber,andisheatedorcooledbyintroducinghotorcoldairintothechamber.Indualchambercycling,theloadisplacedonamovingplatformthatshuttlesbetweenstationarychambersmaintainedatfixedtemperatures.Intriplechambertemperaturecyclingtherearethreechambersandtheloadismovedbetweenthem.Thistestisconductedtodeterminetheabilityofcomponentsandsolderinterconnectstowithstandmechanicalstressesinducedbyalternatinghighandlowtemperatureextremes.Permanentchangesinelectricaland/orphysicalcharacteristicscanresultfromthesemechanicalstresses.2Termsanddefinitions2.1LoadThesample(s)andassociatedfixtures(trays,racks,etc.)inthechamberduringthetest.2.2WorkingzoneThevolumeinthechamber(s)inwhichthetemperatureoftheloadiscontrolledwithinthespecifiedconditions.2.3Sampletemperature:TsThetemperatureofthesamplesduringtemperaturecycling,asmeasuredbythermocouples,orequivalenttemperaturemeasurementapparatus,affixedto,orimbeddedin,theirbodies.Thethermocouple,orequivalenttemperaturemeasurementapparatus,attachmentmethodusedshouldensurethattheentiremassofthesample(s)isreachingthetemperatureextremesandthesoakrequirements.JEDECStandardNo.22-A104CPage2TestMethodA104C(RevisionofTestMethodA104-B)2Termsanddefinitions(cont’d)2.4Maximumsampletemperature:Ts(max)Themaximumtemperatureexperiencedbythesample(s)asmeasuredbythermocouples,per2.3.2.5Minimumsampletemperature:Ts(min)Theminimumtemperatureexperiencedbythesample(s)asmeasuredbythermocouples,per2.3.2.6LoadtransfertimeThetimeittakestophysicallytransfertheloadfromonetemperaturechamberandintroduceitintotheother.Loadtransferappliestodualandtriplechambercycling.2.7MaximumloadThelargestloadthatcanbeplacedinthechamberandstillmeetthespecifiedtemperaturecyclingrequirementsasverifiedbythermocouples,per2.3.2.8NominalΔTThedifferencebetweennominalTs(max)andnominalTs(min)fortheTemperatureCyclingTestCondition;seeTable1.2.9SoaktimeThetotaltimethesampletemperatureiswithinaspecifiedrangeofeachnominalTs(max)andnominalTs(min).ThisrangeisdefinedasthetimeTsisat–5°Cto+10/+15°C(dependentontheTestConditiontolerance)ofTs(max)nominalfortheupperendofthecycleandthetimeTsis+5°Cto–10°CofTs(min)nominalforthelowerendofthecycle.2.10SoaktemperatureThetemperaturerangethatis–5°Cto+10/+15°C(dependentontheTestConditiontolerance)ofTs(max)nominaland+5°Cto–10°CofTs(min)nominal.2.11CycletimeTimebetweenonehightemperatureextremetothenext,orfromonelowtemp