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1、IECIECTR61191-9Edition1.02023-06TECHNICA1.REPORTco1.ourinsidePrintedboardassemb1.ies-Part9:E1.ectrochemica1.re1.iabi1.ityandioniccontaminationonprintedcircuitboardassemb1.iesforuseinautomotiveapp1.ications-BestpracticesTHISPUB1.ICATIONISCOPYRIGHTPROTECTEDCoPyright2023IEC1Geneva,Switzer1.andAJ1.right
2、sreserved.UnteesO1.herWigespecified,nopartofthisPUb1.iCabonmaybereproducedoruti1.izedinanyformOfAanymeans,e1.ectronicormeca11opyigandmcro1.m,WAhOSpermissioninwntngfromeitherIECofIECmemberNationa1.Committeeinthecountryoftherequester.IfycuhaveanyquestionsaboutIECcopyrighthaveanenquiryaboutOb1.aninganc
3、ona1.rightStothsPUbtCagn.pte-ascontacttheaddressM11oryour1.oca1.IECmc11crNatKXI霖COmn1.inCfxfurtheri11formatkx.IECSeaeiariaiTd.:412291902113.ruedeVarembe,Mca1.Commtsskxi(IEC)isth1.eadinggota1.organizationthatpreparesandpunishes1.nf11abona1.Standards1.ota1.1.e1.ectricai.Gectronicandre1.atedIechnoksgie
4、s.AboutIECpub1.icationsThetechnica1.contortdIECpub1.ications$keptunderconstantreviewbyIbCIECP1.cascmakesurothatyouhavethe1.atestedition,ayaIafteCyotcriteria(referencenumber,texttechnica1.oommittcat3reteased.Avai1.ab1.eon1.ineandCnCeamonthbyemai1.IECCustomerServiceCentre-webstore.1.ec.chescIfyouwhtog
5、rveuyourfeedbackonthispub1.icationorneedfurtherasstsia11,p1.easecontacttheCustomerServiceCnure.satesec.ch.IECProducts&ServicesPor1.a1.products.icc.chDiscoverourPCWCrfU1.soarcengineandrcshaveaccessiouptoda1.eco11W11ttai1.oredtoyourneeds.EIaetrOPed3www.Hectropedia.orgTheVVOfIcfsIeadngon1.inedictionary
6、ondectrotechno1.ogy,nia11ingmorethan22300trm11otogicanw*C1.MwrfHdF吐cECnr加8CONTENTSFOREWORD5INTRODUCTION71 Scope82 Normativereferences83 Terms.M1.irUIiOnSandabbreviatedterms83.1 Termsanddefinitionsre1.atedtomanagement93.2 Technica1.termsanddefinitions93.3 3Abbreviatedterms104 Fai1.uremodee1.ectrochem
7、ica1.migration101 .1Backgroundofe1.ectrochemica1.migration104 2C(xnp4e1.yofe1.ectrochemica1.migration125 3Conductiveanodicfi1.ament(CAFandanodicmigrationphenomena(AMP)136 .4Creepcorrosion145 E1.ectrochemocaJmigrationandre1.evanceofionic11tamination155.1 Genera1.aspects155.2 Backgroundofioniccontamin
8、ationmeasurement155.3 Restrictionsand1.imitationsofIonccontaminationmeasurementficcontaminationmeasurementtorc1.eanedproducts285.5 Howtodo-Guidancetousecases375.6 Examp1.estorgoodpractice406 Surfaceirsutaonre1.iance(SIR)4361SIR-Abinationsandfau1.typrocessing436.1 Fundamenta1.parametersofinf1.uenceon
9、SIR436.2 3HarmonizationofSIRtestconditionsforcharacterizationofmateria1.sforautomotiveappfccations516.3 DifferentstepsofSIRtesting517 ComprehensiveSIRtesting-B52-approach557.1 Genera1.aspects5572ThemainB52testboard567.3 Thetestpatterns577.4 ProcessingofB52boards597.5 Samp1.eSaeforSIRtestingotB52test
10、coupons597.6 6PreparationforSIRtesting597.7 SequenceofSIRtesting6078Eva1.uation628 Eam*etorgoodpractice628.1 1Methodo1.ogyformateria1.andprocessquaMication.processcontro1.6282Step1-Materia1.qua1.ification628.3 Step2-ProductdesignverificationandprocessVHidatiOn48.4 Step3-Definitionofprocesscontro1.1.
11、imits65AnnexA(informative)S1.RmeasurementforSMTso1.derpaste-Representativeexamp1.e.67A_1Purpose87A2Equipment67A.3ExampJeofaninstructionhowtoperformthetest67Bib1.iography70Figure 1 -PrindPB1.reactionmechanismofECM11Figure 2 -Uncertaintyin1.oca1.nditionsdeterminesECMfai1.ures11Figure 3 -OccurrenceofECMfai1.uresduringhumiditytests12Figure 4 -VENNdiagramshowingthefactorsinf1.uencingECM13Figure 5 -OccurrenceofCAFandAMP14Figure 6 -Creepcorrosioncausedbycorrosivegases15Figure 7 -kiccontaminationmeasurement16FigWe8-PdnC
