JESD22-A101D

JEDECSTANDARDSteady-StateTemperature-HumidityBiasLifeTestJESD22-A101D(RevisionofJESD22-A101C,March2009)JULY2015JEDECSOLIDSTATETECHNOLOGYASSOCIATIONNOTICEJEDECstandardsandpublicationscontainmaterialthathasbeenprepared,reviewed,andapprovedthroughtheJEDECBoardofDirectorslevelandsubsequentlyreviewedandapprovedbytheJEDEClegalcounsel.JEDECstandardsandpublicationsaredesignedtoservethepublicinterestthrougheliminatingmisunderstandingsbetweenmanufacturersandpurchasers,facilitatinginterchangeabilityandimprovementofproducts,andassistingthepurchaserinselectingandobtainingwithminimumdelaytheproperproductforusebythoseotherthanJEDECmembers,whetherthestandardistobeusedeitherdomesticallyorinternationally.JEDECstandardsandpublicationsareadoptedwithoutregardtowhetherornottheiradoptionmayinvolvepatentsorarticles,materials,orprocesses.BysuchactionJEDECdoesnotassumeanyliabilitytoanypatentowner,nordoesitassumeanyobligationwhatevertopartiesadoptingtheJEDECstandardsorpublications.TheinformationincludedinJEDECstandardsandpublicationsrepresentsasoundapproachtoproductspecificationandapplication,principallyfromthesolidstatedevicemanufacturerviewpoint.WithintheJEDECorganizationthereareprocedureswherebyaJEDECstandardorpublicationmaybefurtherprocessedandultimatelybecomeanANSIstandard.Noclaimstobeinconformancewiththisstandardmaybemadeunlessallrequirementsstatedinthestandardaremet.Inquiries,comments,andsuggestionsrelativetothecontentofthisJEDECstandardorpublicationshouldbeaddressedtoJEDECattheaddressbelow,orreferto©JEDECSolidStateTechnologyAssociation20153103North10thStreetSuite240SouthArlington,VA22201-2107Thisdocumentmaybedownloadedfreeofcharge;howeverJEDECretainsthecopyrightonthismaterial.Bydownloadingthisfiletheindividualagreesnottochargefororreselltheresultingmaterial.PRICE:ContactJEDECPrintedintheU.S.A.AllrightsreservedPLEASE!DON’TVIOLATETHELAW!ThisdocumentiscopyrightedbyJEDECandmaynotbereproducedwithoutpermission.Forinformation,contact:JEDECSolidStateTechnologyAssociation3103North10thStreetSuite240SouthArlington,VA22201-2107orreferto(RevisionofTestMethodA101C)TESTMETHODA101DSTEADY-STATETEMPERATURE-HUMIDITYBIASLIFETEST(FromJEDECBoardBallotsJCB-96-64,JCB-09-10,andJCB-15-28,formulatedunderthecognizanceofJC-14.1CommitteeonReliabilityTestMethodsforPackagedDevices.)1ScopeTheSteady-StateTemperature-HumidityBiasLifeTestisperformedtoevaluatethereliabilityofnon-hermeticpackagedICdevicesinhumidenvironments.Temperature,humidity,andbiasconditionsareappliedtoacceleratethepenetrationofmoisturethroughtheexternalprotectivematerial(encapsulantorseal)oralongtheinterfacebetweentheexternalprotectivematerialandthemetallicconductorswhichpassthroughit.2ApparatusThetestrequiresatemperature-humiditytestchambercapableofmaintainingaspecifiedtemperatureandrelativehumiditycontinuously,whileprovidingelectricalconnectionstothedevicesundertestinaspecifiedbiasingconfiguration.2.1TemperatureandrelativehumidityThechambermustbecapableofprovidingcontrolledconditionsoftemperatureandrelativehumidityduringramp-upto,andramp-downfrom,thespecifiedtestconditions.NOTECareshouldbetakentoensurethetestchamber(dry-bulb)temperatureexceedsthewet-bulbtemperatureatalltimes.2.2DevicesunderstressDevicesunderstressmustbephysicallylocatedtominimizetemperaturegradients.NOTECareshouldbetakentominimizerelativehumiditygradientsandmaximizeairflowbetweendevices.2.3MinimizereleaseofcontaminationCaremustbeexercisedinthechoiceofboardandsocketmaterialstominimizereleaseofcontamination,andtominimizedegradationduetocorrosionandothermechanisms.2.4IoniccontaminationIoniccontaminationfromthetestapparatus(e.g.,cardcage,testboards,sockets,wiring,storagecontainers,etc.)shallbecontrolledtoavoidtestartifacts.2.5DeionizedwaterDeionizedwaterwithaminimumresistivityof1MΩ-cmatroomtemperatureshallbeused.JEDECStandardNo.22-A101DPage2TestMethodA101D(RevisionofTestMethodA101C)3TestConditionsTestconditionsconsistofatemperature,relativehumidity,anddurationusedinconjunctionwithanelectricalbiasconfigurationspecifictothedevice.3.1Temperature,RelativeHumidityandDurationTemperature1[dry-bulb°C]RelativeHumidity1[%]Temperature2[wet-bulb,°C]VaporPressure2[kPa(psia)]Duration3[hours]85±285±581.049.1(7.12)Typ.1000+168/-24NOTE1Tolerancesapplytotheentireuseabletestarea.NOTE2Forinformationonly.NOTE3Thetestconditionsaretobeappliedcontinuouslyexceptduringanyinterimreadouts.Forinterimreadouts,devicesshouldbereturnedtostresswithinthetimespecifiedin4.5.3.2BiasingguidelinesApplyeitherofthetwomethodsofbiasaccordingtothefollowingguidelines:a)Minimizepowerdissipation.b)Alternatepinbiasasmuchaspossible.c)Distributepotentialdifferencesacrosschipmetallizationasmuchaspossible.d)Maximizevoltagewithinoperatingrange.NOTEThepriorityoftheaboveguidelinesdependsonmechanismandspecificdevicecharacteristics.e)Eitheroftwomethodsofbiascanbeusedtosatisfytheseguidelines,whicheveri