IPCCC830B-2002印刷線路組件用電氣絕緣化合物的認(rèn)證與性能

ELECTRONICSINDUSTRIES?

ASSOCIATIONCONNECTING

IPC-CC-830B

QualificationandPerformanceofElectricalInsulatingCompoundforPrintedWiringAssemblies

IPC-CC-830B

August2002 AstandarddevelopedbyIPC

SupersedesIPC-CC-830AwithAmendment1

July1999

2215SandersRoad,Northbrook,IL60062-6135

Tel.847.509.9700Fax847.509.9798

ThePrinciplesofStandardization

InMay1995theIPC’sTechnicalActivitiesExecutiveCommitteeadoptedPrinciplesofStandardizationasaguidingprincipleofIPC’sstandardizationefforts.

StandardsShould:

ShowrelationshiptoDesignforManufacturability(DFM)andDesignfortheEnvironment(DFE)

Minimizetimetomarket

Containsimple(simplified)language

Justincludespecinformation

Focusonendproductperformance

Includeafeedbacksystemonuseandproblemsforfutureimprovement

StandardsShouldNot:

Inhibitinnovation

Increasetime-to-market

Keeppeopleout

Increasecycletime

Tellyouhowtomakesomething

Containanythingthatcannotbedefendedwithdata

Notice IPCStandardsandPublicationsaredesignedtoservethepublicinterestthrougheliminatingmisunderstandingsbetweenmanufacturersandpurchasers,facilitatinginterchangeabilityandimprovementofproducts,andassistingthepurchaserinselectingandobtainingwithminimumdelaytheproperproductforhisparticularneed.ExistenceofsuchStandardsandPublicationsshallnotinanyrespectprecludeanymemberornonmemberofIPCfrommanufacturingorsell-ingproductsnotconformingtosuchStandardsandPublication,norshalltheexistenceofsuchStandardsandPublicationsprecludetheirvoluntaryusebythoseotherthanIPCmembers,whetherthestandardistobeusedeitherdomesticallyorinternationally.

RecommendedStandardsandPublicationsareadoptedbyIPCwithoutregardtowhethertheiradoptionmayinvolvepatentsonarticles,materials,orprocesses.Bysuchaction,IPCdoesnotassumeanyliabilitytoanypatentowner,nordotheyassumeanyobligationwhatevertopartiesadoptingtheRecommendedStandardorPublication.Usersarealsowhollyresponsibleforprotectingthemselvesagainstallclaimsofliabilitiesforpatentinfringement.

IPCPositionStatementonSpecificationRevisionChange

ItisthepositionofIPC’sTechnicalActivitiesExecutiveCommittee(TAEC)thattheuseandimplementationofIPCpublicationsisvoluntaryandispartofarelationshipenteredintobycustomerandsupplier.WhenanIPCstandard/guidelineisupdatedandanewrevisionispub-lished,itistheopinionoftheTAECthattheuseofthenewrevisionaspartofanexistingrelationshipisnotautomaticunlessrequiredbythecontract.TheTAECrecommendstheuseofthelatestrevision. AdoptedOctober6.1998

Whyisthereachargefor

thisstandard?

Yourpurchaseofthisdocumentcontributestotheongoingdevelopmentofnewandupdatedindustrystandards.Standardsallowmanufacturers,customers,andsupplierstounderstandoneanotherbetter.Standardsallowmanufacturersgreaterefficiencieswhentheycansetuptheirprocessestomeetindustrystandards,allowingthemtooffertheircustomerslowercosts.

IPCspendshundredsofthousandsofdollarsannuallytosupportIPC’svolunteersinthestandardsdevelopmentprocess.Therearemanyroundsofdraftssentoutforreviewandthecommitteesspendhundredsofhoursinreviewanddevelopment.IPC’sstaffattendsandparticipatesincommitteeactivities,typesetsandcirculatesdocumentdrafts,andfollowsallnecessaryprocedurestoqualifyforANSIapproval.

IPC’smembershipdueshavebeenkeptlowinordertoallowasmanycompaniesaspossibletoparticipate.Therefore,thestandardsrevenueisnecessarytocomplementduesrevenue.Thepricescheduleoffersa50%discounttoIPCmembers.IfyourcompanybuysIPCstandards,whynottakeadvantageofthisandthemanyotherbenefitsofIPCmembershipaswell?FormoreinformationonmembershipinIPC,pleasevisit

orcall847/790-5372.

Thankyouforyourcontinuedsupport.

?Copyright2002.IPC,Northbrook,Illinois.AllrightsreservedunderbothinternationalandPan-Americancopyrightconventions.Anycopying,scanningorotherreproductionofthesematerialswithoutthepriorwrittenconsentofthecopyrightholderisstrictlyprohibitedandconstitutesinfringementundertheCopyrightLawoftheUnitedStates.

IPC-CC-830B

ELECTRONICSINDUSTRIES?

ASSOCIATIONCONNECTING

QualificationandPerformanceofElectricalInsulatingCompoundforPrintedWiringAssemblies

DevelopedbytheConformalCoatingTaskGroup(5-33a)oftheCleaningandCoatingCommittee(5-30)

August9,2002

Supersedes:

IPC-CC-830Awith

Amendment1-July1999IPC-CC-830A-October1998IPC-CC-830-January1984

Usersofthisstandardareencouragedtoparticipateinthedevelopmentoffuturerevisions.

Contact:

IPC

2215SandersRoadNorthbrook,Illinois60062-6135

Tel847509.9700

Fax847509.9798

ThisPageIntentionallyLeftBlank

August2002

IPC-CC-830B

IPC-CC-830B

August2002

PAGE\*roman

iii

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iv

Acknowledgment

AnyStandardinvolvingacomplextechnologydrawsmaterialfromavastnumberofsources.WhiletheprincipalmembersoftheConformalCoatingTaskGroup(5-33a)oftheCleaningandCoatingCommittee(5-30)areshownbelow,itisnotpossibletoincludeallofthosewhoassistedintheevolutionofthisstandard.Toeachofthem,themembersoftheIPCextendtheirgratitude.

CleaningandCoatingCommittee

Chair

FrankCala,Ph.D.

ChurchandDwightCo.Inc.

ConformalCoatingTaskGroup

Chair

JohnWaryold

HumisealDivision/ChaseCorporation

ConformalCoatingTaskGroup

DavidC.Adams,RockwellCollinsPaulAlexander,Shin-EtsuSiliconeNorazmiAlias,UCBAsiaPacific

SdnBhd

PatriciaJ.Amick,BoeingAircraft&Missiles

LloydArmogan,RockwellCollinsKimM.Atkins,SpecializedCoating

Services

RichardA.Barnett,CompaqComputerCorporation

JamesP.Barlett,Ph.D.,P.E.,NorthDakotaStateUniversity

HeatherBenedict,PlexusCorporationPaulA.Berry,P.E.,DowCorning

Corporation

FredJ.Biederman,ConvergentNetworks

GeraldLeslieBogert,BechtelPlantMachinery,Inc.

RexL.Breunsbach,ElectronicControlsDesign,Inc.

AlanM.H.Brewing,NationalPhysicalLaboratory

RonaldJ.Brock,NSWC-CraneRickCarlson,TaiyoAmericaInc.

WillyChang,BoeingPhantomWorks

HenryGClausen,CharlesStarkDraperLabs

M.LeeCollier,ElectraPolymers&ChemicalsAmerica

DavidJ.Corbett,DefenseSupplyCenterColumbus

LawrenceN.Crane,Ph.D.,LoctiteDexter

AmeliaA.DeBaggis,HoneywellInc.WilliamC.Dieffenbacher,BAE

SystemsControls

WilliamE.Donges,Asymtek-ANordsonCompany

DavidA.Douthit,LoCan,LLCJariDrlik,LockheedMartinSpace

Systems

BernardEcker,NorthropGrummanThomasG.Farrell,Underwriters

LabsInc.

JoeR.Felty,RaytheonSystemsCompany

LarryFisher,DexterElectronicMaterials

NeilS.Fox,SierraPolymerCompany

PierreGadoua,CMCElectronicsInc.MahendraS.Gandhi,SpaceSystems/

Loral

AlanL.Gillespie,BoeingAircraft&Missiles

ScottD.Glasspoole,HoneywellInc.SharonK.Goudie,DowCorning

Corporation

HueT.Green,LockheedMartinSpaceSystems

MichaelR.GreenLockheedMarinSpaceSystems

DavidGreenman,ConcoatLimitedJamesGryga,RockwellAutomation/

Allen-Bradley

JamesHeaton,LoctiteDexterDavidHill,3MCompany

PhillipE.Hinton,HintonPWBEngineering

BruceHoughton,CelesticaInc.ChristopherHunt,Ph.D.,National

PhysicalLaboratory

LesHymes,TheCompleteConnection

BernardIcore,NorthropGrummanCorporation

BuckJohnson,3MCompanyDavidH.Johnson,U.S.AirForceTedJones,InSurf

JosephE.Kane,BAESystemsControls

DonaldKarp,TraceLaboratories-Central

WilliamG.Kenyon,Ph.D.,GlobalCentreforProcessChange,Inc.

DaoudKhourma,ParyleneEngineering

PhilKinner,ConcoatLimitedJeffreyF.Koon,RaytheonCompanyVijayKumar,LockheedMartin

Missile&FireControl

JohnW.Lampe

RogerH.Landolt,EnthoneInc.JamesLawrence,HumisealDivision/

ChaseCorporation

CurtisA.Lustig,ShipleyCompany,L.L.C.

JamesF.Maguire,IntelCorporationReneR.Martinez,TRWElectronics

&TechnologyDivision

BrianC.McCrory,DelsenTestingLaboratories

ReneeJ.Michalkiewicz,TraceLaboratories-East

JamesMinadeo,AITechnologies,Inc.

WilliamP.Morgan,SandiaNationalLabsAlbuquerque

JohnMoylan,DelsenTestingLaboratories

KarlB.Mueller,BoeingAircraft&Missiles

TerryL.Munson,CSLInc.GrahamNaisbitt,ConcoatLimitedRobertNetzel,NorthropGrumman

Corporation

MarkNeuber,Shin-EtsuChemicalCo.Ltd.

DeboraL.Obitz,TraceLaboratories-East

JanObrzut,Ph.D.,NIST

NobuhiroOhta,Shin-EtsuChemicalCo.Ltd.

RogerA.Olson,SpecialtyCoatingSystemsInc.

ScottS.Opperhauser,TraceLaboratories-East

DouglasO.Pauls,RockwellCollinsJeffreyQuarberg,SauerDanfoss

WilliamA.Rasmus,Jr.,NorthropGrummanSpaceSystems

AlanD.Rice,TRW

BarryRitchie,DowCorningCorporation

AllenJRobarge,SpecialtyCoatingSystemsInc.

JohnH.Rohlfing,DelphiDelcoElectronicsSystems

LeoRoos,Ph.D.,PolycladLaminates

J.HughRussell,DefenseSupplyCenterRichmond

JosephC.Salvini,UnderwritersLaboratoriesInc.

HenrySanftleben,DelphiDelcoElectronicsSystems

DarrellC.Schneider,ViasystemsInc.StanleyS.Seelig,Dynaloy,Inc.

JosephL.Sherfick,NSWC-Crane

LowellSherman,DefenseSupplyCenterColumbus

HansL.Shin,PacificTestingLaboratories,Inc.

JohnC.Sines,BAESystemsControls

JohnE.Sohn,Ph.D.,

PatrickSprague,NorthropGrummanCorporation

KarenA.Tellefsen,Ph.D.,LoctiteCorporation

BrianJ.Toleno,Ph.D.,LoctiteCorporation

WilliamTran,ShipleyCompany,LLC

LauraJ.Turbini,Ph.D.,UniversityofToronto

PaulaVanDenberg,PlasmaSystemsCrystalE.Vanderpan,Underwriters

LaboratoriesInc.DavidA.Vaughan

DonaldWaddell,RockwellAutomation

LarryWaksman,Shin-EtsuSiliconeChrisI.Wall,ElectraPolymers&

ChemicalsLtd.

PhilipW.Wittmer,DelphiDelcoElectronicsSystems

FondaB.Wu,RaytheonSystemsCompany

LamarYoung,SpecialtyCoatingSystemsInc.

DonYoungblood,HoneywellInc.

August2002

IPC-CC-830B

IPC-CC-830B

August2002

PAGE\*roman

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vi

TableofContents

SCOPE

1

Scope

1

Purpose

1

Classification

1

Types

1

Classes

1

Interpretation

1

APPLICABLEDOCUMENTS

1

IPC

1

Government

2

AmericanSocietyforTestingofMaterials

2

UnderwritersLaboratories

2

ANSI

2

ISO

2

REQUIREMENTS

2

GeneralRequirements

2

TermsandDefinitions

2

Conflict

2

InspectionandTestingRequirements

2

QualificationInspectionandTesting

2

QualificationRetentionInspection

andTesting

2

QualityConformanceInspectionTesting

2

AdditionalTesting

3

MaterialsRequirements

3

Materials

3

ShelfLife

3

Cure

3

ChemicalRequirements

3

FourierTransformInfraredSpectroscopy

Test(FTIR)

3

PhysicalRequirements

4

Viscosity

4

Appearance

4

Fluorescence

4

FungusResistance

4

Flexibility.

4

Flammability

4

ElectricalRequirements

4

DielectricWithstandingVoltage(DWV)

4

EnvironmentalRequirements

4

MoistureandInsulationResistance

4

ThermalShock

4

TemperatureandHumidityAging(HydrolyticStability)

4

QUALITYASSURANCEPROVISION

5

ResponsibilityforInspection

5

CategoriesofInspection

5

QualificationInspection

5

QualificationRetentionInspection

5

QualityConformanceInspection

5

FrequencyofInspection

5

QualificationInspection

5

QualificationRetentionInspection

5

QualityConformanceInspection

5

ProductChange

5

TestEquipmentandInspectionFacilities

5

StandardLaboratoryConditions

5

PermissibleTemperatureVariationinEnvironmentalChambers

6

ReferenceConditions

6

InspectionRoutine.

6

InspectionSampling

6

TestVehicles

6

SampleSize

6

PreparationPriortoCoating

6

Coating.

7

Failures

7

InspectionReporting

7

QualificationReporting

7

QualificationRetentionReporting

7

QualityConformanceReporting

7

PREPARATIONFORDELIVERY

7

Containers

7

Packaging.

8

Marking

8

NOTES

8

OrderData

8

FormulationChange

8

Conditioning

8

Cleanliness

8

Adhesion

8

SolventCompatibility

8

IdentificationofSolventSensitiveConformalCoatings

8

AppendixA ExampleofQualificationInspectionReport

9

AppendixB ExampleofQualificationRetentionInspectionReport

10

AppendixC ExampleofQualityConformance

InspectionReport

11

Figures

Figure4-1 IPC-B-25A

7

Figure4-2 TestCouponwith‘‘Y’’ShapePattern

7

Tables

Table3-1 RequirementsforQualification,QualificationRetentionandQualityConformanceof

ConformalCoatingProducts

3

Table4-1 TestVehiclesandSampleSizes

6

Table4-2 ThicknessRequirementsonTestVehicle

7

August2002

IPC-CC-830B

IPC-CC-830B

August2002

PAGE

11

PAGE

10

QualificationandPerformanceofElectricalInsulatingCompoundforPrintedWiringAssemblies

SCOPE

ScopeThisstandardestablishesqualificationandconformancerequirementsforelectricalinsulatingcom-pounds(conformalcoatings).Ithasbeendesignedandcon-structedwiththeintentofobtainingmaximumconfidenceinthematerialswithminimumtestredundancy.Thisstan-dardcovers:

Thequalificationandqualificationretentionoftheconfor-malcoatingmaterial(Table3-1,ColumnAandB).

Thequalityconformanceofconformalcoatingmaterialproperties(Table3-1,ColumnC).

Forthepurposeofthisstandard,thetermconformalcoat-ingisusedhereinwhenreferringtoatypeofprotectivecoatingforuseonprintedwiringassemblies.Theconfor-malcoatingisintendedtoprovideprotectionfrommoistureandcontaminationandprovideelectricalinsulation;notasasolesourceofmechanicalsupport.

Forthepurposeofthisstandard,inspectionsareperformedonstandardizedtestvehiclesinsteadofrealproductionassemblies.Astandardizedtestvehiclereferstothetestvehiclespecifiedpertestmethodindicated,coatedwiththeconformalcoatingunderinspection.

PurposeWithstandardizedtestingonstandardizedtestvehiclesundertestconditionsspecifiedintestmethodslistedherein,thisstandardenablesamanufacturertoqualifyhisconformalcoatingproductandexpressthequalificationitpossesses.Thisstandardalsoenablesthemanufacturertoattesttheconformanceofthequalityofproductiontothequalificationofeachproduct.

Classification

TypesConformalcoatingsshallbecategorizedintotypesbythecuredchemistryofthecoating.Thetypeformultifunctionalmaterialsshallbebasedonthechemis-trytypewhichisthehighestpercentagebyweight.

Conformalcoatingsshallbeofthefollowingtypes:TypeAR—Acrylic

TypeER—EpoxyTypeSR—Silicone

TypeUR—PolyurethaneTypeXY—Paraxylylene

ClassesThisstandardallowsamanufacturertoclassifyhisqualifiedproductsaccordingtofunctionalcapa-bilities.Inspectionandtestingrequirementsaredifferentforeachclass.Classificationattainedshallbereportedinthequalificationinspectionreport.AnexampleofthereportformatisshowninAppendixA.

Conformalcoatingsshallbeofthefollowingclasses:

ClassA—Non-hydrolyticallystableconformalcoating.Temperatureandhumidityagingtestisnotrequiredforthisclassofproduct.Lowermoistureinsulationresistanceispermitted(see3.7.1).

ClassB—Hydrolyticallystableconformalcoating.Tem-peratureandhumidityagingtestisrequiredforthisclassofproduct.Highermoistureinsulationresistanceisrequired(see3.7.1).

Note:Previousversionsofthisspecification,andotherIPCdocuments,makereferenceto‘‘Class1,’’‘‘Class2’’and‘‘Class3.’’InspectionandtestingrequirementsfortheseclassesarenotdirectlycorrelatedtoClassAandB.

Interpretation‘‘Shall,’’theimperativeformoftheverb,isusedthroughoutthisstandardwheneverarequire-mentisintendedtoexpressaprovisionthatismandatory.Deviationfroma‘‘shall’’requirementmaybeconsideredifsufficientdataissuppliedtojustifytheexception.

Thewords‘‘should’’and‘‘may’’areusedwheneveritisnecessarytoexpressnon-mandatoryprovisions.‘‘Will’’isusedtoexpressadeclarationofpurpose.

Toassistthereader,theword‘‘shall’’ispresentedinboldcharacters.

APPLICABLEDOCUMENTS

Thefollowingdocumentsoftheissuecurrentlyineffectformapartofthisstandardtotheextentspecifiedherein.

IPC1

IPC-B-25AMultipurposeTestBoard

IPC-T-50TermsandDefinitionsforInterconnectingandPackagingElectronicCircuits

IPC-TM-650TestMethodsManual2

2.3.42 IdentificationofSolderMaskProductsUsingFourierTransformInfraredSpectroscopy(FTIR)

CurrentandrevisedIPCTestMethodsareavailablethroughIPC-TM-650subscriptionandontheIPCWebsite

(/html/testmethods.htm).

Flexibility

DielectricWithstandingVoltage-PolymericConformalCoating

FungusResistance-ConformalCoating

MoistureandInsulationResistance-ConformalCoating

ThermalShock-ConformalCoating

HydrolyticStability-ConformalCoating

IPC-4101SpecificationforBaseMaterialsforRigidandMultilayerPrintedBoards

IPC-6012SectionalStandardforQualificationofRigidPrintedBoards

Government3

MIL-I-46058InsulatingCompound,Electrical(ForCoatingPrintedCircuitAssemblies)

MIL-STD-1188CommercialPackagingofSuppliersandEquipment

FED-STD-141Paint,Varnish,LacquerandRelatedMateri-als:MethodsofInspection,SamplingandTesting,Method4061andMethod2012

AmericanSocietyforTestingofMaterials4

ASTM-D-1005MeasurementofDryFilmThicknessofOrganicCoatings

ASTM-D-1084ViscosityofAdhesives,Testsfor

UnderwritersLaboratories5

UL94Flammability

ANSI6

NCSLZ540-1CalibrationCalibrationLaboratoriesandMeasuringandTestEquipment

ISO7

ISO10012-1QualityAssuranceRequirementsforMeasur-ingEquipment-Part1:MetrologicalConfirmationSystemforMeasuringEquipment

REQUIREMENTS

GeneralRequirements

TermsandDefinitionsDefinitionsofterminologyapplicabletothisstandardshallbeinaccordancewithIPC-T-50.

ConflictIntheeventofaconflictbetweentherequirementsofthisstandardandprocurementdocument,theprocurementdocumentshalltakeprecedence.Intheeventofaconflictbetweenthetestparametersofthisstan-dardandthetestmethods,oraconflictbetweentherequirementsinthisstandardandtheapplicabledocumentslistedinSection2,thisstandardshalltakeprecedence.

InspectionandTestingRequirementsGroupsofinspectionandtestlistedinTable3-1shallbeperformedtoverifytheabilityofaconformalcoatingproducttomeetthequalificationand/orconformancerequirementsofthisstandardusingthetestmethodsdescribedherein.

QualificationInspectionandTestingQualifica-tiontothisstandardisachievedwhenaconformalcoatingproductmeetstherequirementslistedinColumnAofTable3-1.Testsshallbeperformedinaccordancewiththetestmethodsspecifiedusingtestspecimenspreparedincompli-ancewith4.7.Aqualificationinspectionreportshallbecompletedinaccordancewith4.9andrelevanttestdataretainedassubstantiationforthequalification.AnexampleofqualificationinspectionreportformatisshowninAppendixA.

Whenaprimermaterialisusedinconjuctionwithacoat-inginqualificationtesting,theprimerusedwillbedocu-mentedinthequalificationreport.

ConformalcoatingspresentlyqualifiedtoMIL-I-46058shallalsoberecognizedasmeetingtherequirementsofIPC-CC-830.TheseproductscurrentlyqualifiedorintheprocessofbeingrequalifiedtoMIL-I-46058priortothepublishdateofthisdocumentwillalsoberecognizedasmeetingtherequirementsofthisdocument.

QualificationRetentionInspectionandTestingQualificationtothisstandardcanberetainedwhenacon-formalcoatingproductmeetstherequirementslistedinColumnBofTable3-1.Testsshallbeperformedinaccor-dancewiththetestmethodsspecifiedusingtestspecimenspreparedincompliancewith4.7atafrequencydefinedin

4.3.2.Pertinenttestresultsshallbecomparedwiththeresultsoftheoriginalqualificationtesting.Aninspectionreportshallbecompletedinaccordancewith4.9andrel-evanttestdataretainedassubstantiationforthequalifica-tionretention.AnexampleofthequalificationretentioninspectionreportformatisshowninAppendixB.

QualityConformanceInspectionTestingTheconsistencyinqualityofaconformalcoatingproductisverifiedwhentherequirementslistedinColumnCofTable

/quicksearch/

Table3-1RequirementsforQualification,QualificationRetentionandQualityConformanceofConformalCoatingProducts

Paragraph

Requirement

TestMethod

ColumnA

ColumnB

ColumnC

Qualification

RetentionofQualification

QualityConformance

3.3.1

Materials

Visual

X

X

X

3.3.2

ShelfLife

—

X

3.3.3

Cure

—

X

X

X

3.4.1

FourierTransformInfraredSpectroscopyTest(FTIR)

IPC-TM-6502.3.42

X

X

3.5.1

Viscosity

ASTMD-1084

X

X

3.5.2

Appearance

Visual

X

X

X

3.5.3

Fluorescence

VisualunderUVlight

X

X

X

3.5.4

FungusResistance

IPC-TM-650

X

X

3.5.5

Flexibility

IPC-TM-650

X

3.5.6

Flammability

UL94HB

X

X

3.6.1

DielectricWithstandingVoltage

IPC-TM-650

X

3.7.1

MoistureandInsulationResistance

IPC-TM-650

X*

X*

3.7.2

ThermalShock

IPC-TM-650

X

3.7.3

TemperatureandHumidityAging(HydrolyticStability)

IPC-TM-650

RequiredforClassBProductsOnly

XDenotesinspectionandtestrequiredforallclasses.

*DenotesrequirementisdifferentforClassAandClassB.See3.7.1forClassAandBrequirements.

3-1aresatisfied.Testsshallbeperformedinaccordancewiththetestmethodsspecifiedusingtestspecimenspre-paredincompliancewith4.7atafrequencydefinedin

4.3.3.Pertinentresultsshallbecomparedwiththeresultsoftheoriginalqualificationtesting.Aninspectionreportshallbecompletedinaccordancewith4.9andrelevanttestdataretainedassubstantiationforthequalityconformance.AnexampleofqualityconformanceinspectionreportisshowninAppendixC.

Conformalcoatingqualityconformanceinspectionisgen-erallyperformedbythecoatingmanufacturer,butmaywithappropriateagreementbeusedasanincomingmate-rialinspectionprocedurebythecustomers.

AdditionalTestingAdditionaltestingondifferenttestvehicles,atdifferenttestfrequencyorconditions,orforpropertiesoutsidethescopeofthisstandardmaybeagreeduponbetweenthemanufacturersandthecustomers.Itshallnotbeusedasasubstituteforanytestingrequire-mentspecifiedherein.

MaterialsRequirements

MaterialsTheconformalcoatingmaterialsshall

befreeofdeleterioussubstances.

ShelfLifeTheconformalcoatingshallmeetallrequirementsofthisstandardwithintheshelflifeandstor-ageconditionsspecifiedbytheconformalcoatingmanufac-turer.Shelflifeofcoatingwithtwoormorecomponentsshallbethatofthecomponentwiththeshortestshelflife.ThetestsshallconsistofInsulationResistance(IR)andDielectricWithstandingVoltage(DWV).

CureTheconformalcoatingshallexhibitalldesiredpropertieswhenappliedandcuredusingtheproce-duresspecifiedbytheconformalcoatingmanufacturer.

Whencoatingmaterialsaretestedasspecified,thecoatingmaterialshallbecuredtofullhardnessinthetimeandtemperaturerecommendedbythesupplier.

ChemicalRequirements

FourierTransformInfraredSpectroscopyTest(FTIR)FourierTransformInfraredSpectroscopy(FTIR)testshallbeperformedinaccordancewithIPC-TM-650,TestMethod2.3.42,orequivalent,aspartofdatagatheringfortheconformalcoatingduringqualificationinspection.Whenusedinqualificationretentioninspection,FTIRspectrashallbecomparedtothoseobtainedduringqualifi-cationinspection.Absorptionpeakscompletelymissingoradditionalpeakssignifychangeinchemistrypresentwithin

theconformalcoatingproduct.AchangeinchemistryasdetectedbyFTIRmayormaynotconstituteaproductchange.See4.4forthedefinitionofproductchange.

PhysicalRequirements

ViscosityViscosityofuncuredconformalcoatingmaterials,excepttypexy,shallbemeasuredperASTMD-1084andthetestconditionsshallbedefinedbythecoatingmanufacturer.Viscosityshallbemeasuredaspartofdatagatheringfortheconformalcoatingduringqualifi-cationinspection.Thisviscositydatashallbeusedbythemanufacturertopre-determineanacceptableviscosityrangeforqualityconformanceinspection.

AppearanceAppearanceofconformalcoatingonthetestvehiclespecifiedhereinshallbeobservedvisuallywiththeaidofa3-diopter(approximately1.75x)minimummagnification.Refereeinspectionsshallbeaccomplishedat10xmagnification.

Theuncuredconformalcoatingmaterialsshallbefreeofdeleterioussubstances,bubbles,pinholes,whitishspots,blistering,wrinkling,cracking,andpeeling.Thecuredcon-formalcoatingshallbesmooth,homogenous,transparentortranslucent,andtack-freewhenobservedatambientconditions.Inaddition,theconformalcoatingonthetestvehiclesshallhavenobubbles,pinholes,blisters,cracking,crazing,peeling,wrinkles,mealing,orevidenceofrever-sion,orcauseacorrosion.

FluorescenceConformalcoatingmaterials,excepttypeXY,shallbefluorescentbyultra-violetillumination(blacklight).

FungusResistanceTheresistanceoftheconfor-malcoatingmaterialtosupportorbeattackedbybiologi-calgrowthshallbedeterminedinaccordancewithIPC-TM-650,TestMethod.

Thecuredconformalcoatingshallnotcontributetoorbeattackedbybiologicalgrowth.

FlexibilityTinpanelspreparedinaccordancewithFED-STD-141,Method2012shallbeusedastestvehiclesforflexibilitytesting.WhenthecoatedpanelsaretestedinaccordancewithIPC-TM-650,TestMethod,thereshallbenoevidenceofcrackingorcrazingonthecuredconformalcoating.

FlammabilityFlammabilitytestingofthecuredconformalcoatingshallbeperformedinaccordancewiththedetailedrequirementsofUL94HB(HorizontalBurn-ingTest)testmethods.

ThecuredconformalcoatingshallmeetUL94HB(Hori-zontalBurningTest)requirements:

Nothaveaburningrateexceeding40mm[1.57in]perminuteovera75mm[2.95in]spanforspecimenshav-ingathicknessof3.0to13mm[0.118to0.512in],or

Nothaveaburningrateexceeding75mm[2.95in]perminuteover