IPC-TM-650,2,3,28a

1ScopeThistestprocedureisdesignedtomeasurethelevelofanionic(includingweakorganicacidanions)andcat-ioniccontaminationonthesurfaceofcircuitboardsandcircuitboardassembliesbyionchromatography.2ApplicableDocumentsIDEMAM13-99MeasurementofExtractable/LeachableAnionContaminationLevelsonDriveComponentsbyIonChromatography(IC)IPC-TP-1043CleaningandCleanlinessTestProgram,PhaseIII,WaterSolubleFluxes,Part1:B-24,lnteractionsofWaterSolubleFluxeswithMetal/SubstratesIPC-TP-1044CleaningandCleanlinessTestProgram,PhaseIII,WaterSolubleFluxes,Part2:B-36,ComparisontoPhase1RosinBenchmarkIPC-TR-583AnIn-DepthLookatIonicCleanlinessTestingIPC-5701UsersGuideforCleanlinessofUnpopulatedPrintedBoards3TestSpecimen3.1PrintedCircuitBoard(PCB)and/orPrintedCircuitAssembly(PCA)forextraction4ApparatusandMaterial4.1IonChromatographcapableof50ppborbetteriondetection.Theequipmentandchemistryshouldbesetupandstandardizedperthemanufacturer’sinstructions.4.2HotWaterBathcapableofmaintaining80°C±5°C[176°F±9°F].4.3Useacleanheatsealablebag,i.e.KAPAK®500seriesorequivalent,withlessthan250ppbextractablecontami-nants.4.4Cleanroomvinylgloves.(<3ppmofCl).4.5Deionizedwaterwitharesistivityofatleast18.0megohm-centimeter.4.6HPLCorASCgradechemicalsforeluentandregener-antpreparation.4.7NISTtraceablestandards(see6.1).4.82-Propanol(IPA),Electronicgradeorbetter.5Procedure5.1Extraction5.1.1Usecleangloveswhenhandlingthesamplestobetested.Placeeachsampleinanextractionbag.5.1.2Preparea75/25v/vIPA/H20solutionfortheextrac-tion.5.1.3AddaknownvolumeoftheextractionsolutiontotheextractionbagcoveringthePCB/PCA(approximately1/2mL/cm2ofsurfacearea).5.1.4Addthesamevolumeofextractionsolutiontoanemptybagofthesamelotforuseasablank.5.1.5Heatsealallsampleandblankextractionbagsandplaceinan80°C[176°F]waterbathforonehour(-0min.,+5min.).5.1.6Allowthesolutionwithinthebagtocooltoambienttemperaturebeforeopening.5.1.8RecordthesurfaceareaofPCB(lengthxwidthx2)orPCA.Asageneralruleforassemblies,thesurfaceareaisestimatedas:(lengthxwidthx2)+10%.Greatcautionshouldbetakenininterpretationandcomparisonoftheseresultsasassemblysurfaceareaswilloftendeviatebymorethan10%ofits’unpopulatedstate.2215SandersRoadNorthbrook,IL60062-6135IPC-TM-650TESTMETHODSMANUALNumber2.3.28SubjectIonicAnalysisofCircuitBoards,IonChromatographyMethodDate05/04RevisionAOriginatingTaskGroupIonicConductivity/IonChromatographyTaskGroup5-32aMaterialinthisTestMethodsManualwasvoluntarilyestablishedbyTechnicalCommitteesofIPC.Thismaterialisadvisoryonlyanditsuseoradaptationisentirelyvoluntary.IPCdisclaimsallliabilityofanykindastotheuse,application,oradaptationofthismaterial.Usersarealsowhollyresponsibleforprotectingthemselvesagainstallclaimsorliabilitiesforpatentinfringement.EquipmentreferencedisfortheconvenienceoftheuseranddoesnotimplyendorsementbyIPC.Page1of2ASSOCIATIONCONNECTINGELECTRONICSINDUSTRIES®5.2StandardandSampleAnalysis5.2.1InjectthesampleextractsintotheIonChromatograph(IC)andcalculateagainstknownstandards(athreetofivelevelcalibrationisrecommended).5.2.2ValuesfromtheICaretypicallyreportedinppm.5.2.3Resultsaretobeexpressedasµgofionpersquarecentimeterbasedontheextractionvolumeandthecalculatedsamplesurfacearea.µg/cm2=[ppmfromIC(µg/mL)]x[finalvolume(mL)][surfacearea(cm2)]Note:‘‘ppm’’valueisactuallyspecimenvalueminusblankvalue.6Notes6.1Ionswhichmaybeincludedforevaluationareasfol-lows:Anions:BromideChlorideFluorideNitrateNitritePhosphateSulfateCations:AmmoniumCalciumLithiumMagnesiumPotassiumSodiumWeakOrganicAcids:AcetateAdipateFormateGlutamateMalateMethaneSulfonateSuccinatePhthalateOtherionsofinterestmaybepresent.6.2Alternateextractiontechniques(changeintime,tem-perature,orextractionsolution)maybeusedwhenagreeduponbetweenuserandvendor.6.2.1Examplesofalternateextractiontimesincludethefol-lowing:•Ten-minuteextraction(IDEMAspecificationformetalparts)•Twenty-fourhourextraction6.2.2Examplesofalternateextractiontemperaturesincludethefollowing:•Ambienttemperature(22°C±3°C[72°F±5°F])6.2.3Examplesofalternateextractionsolutionsincludethefollowing:•10/90v/vIPA/H2O•Deionizedwater6.3IonChromatographymaybeadestructivetestforprintedcircuitassembliesduethehightemperatureliquidextractionandlackofelectrostaticdischarge(ESD)protection.Cautionshouldbetakenwhentestingsamplesthatareintendedtobedeliverableproductionassemblies.IPC-TM-650Number2.3.28SubjectIonicAnalysisofCircuitBoards,IonChromatographyMethodDate05/04RevisionAPage2of2