SEMI G75.13-0698 TEST METHOD FOR MEASUREMENT OF THE

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1、SEMIG75.13-0698C©SEMI1998TESTMETHODFORMEASUREMENTOFTHELEAKAGECURRENTINLEADFRAMETAPE1SummaryofMethod1.1Tapedleadframesaremoldedundernormalcondi-tions,andtheleakagecurrentbetweendesignatedleadsismeasuredbeforeandaftersubmittingthesam-plestoHAST(121¡C/2atm/100%RH)m

2、oisturetest-ing.2Equipment2.1HASTChamber2.2Amperemeterwith10-15amperemeasuringcapa-bility2.3Powersupplycapableof500voltsDCmaximum2.4Electrostaticallyandelectromagneticallyshieldedbox3Sampling3.1Thesamplingisonesampleperonelot.Theven-dormustreportthedeÞnitionoflo

3、tifthecustomerrequiresit.4PreparationofSpecimens4.1Leadframesshallbecleanedupprevioustotaping,usingaprocedureagreedonbetweenvendorandcus-tomer.4.2TapingConditionsÑTemperature,pressure,anddwelltimeshallbeagreedonbetweenvendorandcus-tomer.NOTE1:Atypicaltaped40pinD

4、IPleadframeisshowninFigure1,andrelevantinformationforthisframeistabulatedinTable1.1SEMIG75.13-0698©SEMI1998Figure1TypicalTaped40PinDIPLeadframeTable1.RelevantInformationfor40PinDIPLeadframeLeadframeAttributeSpeciÞcationLeadframethickness0.25mmLeadframematerialAl

5、loy42LeadframemanufacturingprocessStampingPlatingNone/Silver/OthersSurfacetreatmentTobeagreedbetweentapeuserandsupplier.NOTE2:ThesurfacestateofAlloy42isstablecomparedwithCualloy,whichisoxidizedeasily.4.3Theleadframesshallbemoldedusingmoldingcompoundsandcuredwith

6、postmoldcuringconditionsagreedonbetweenvendorandcustomer.Theuntapedleadframeshallbepreparedwiththesameprocedureasacontrol.4.4Trimtheleadsaccordingtoaprocedureagreedonbetweenvendorandcustomer.SEMIG75.13-0698©SEMI199825Procedure6RelatedDocuments5.1Setupthetestcirc

7、uitasshowninFigure2.6.1ASTMSpeciÞcation1ASTMD257ÑTestMethodsforD-CResistanceorConductanceofInsulatingMaterials6.2JISSpeciÞcation2JISK6911ÑTestingMethodsforThermosettingPlasticsNOTICE:Thesestandardsdonotpurporttoaddresssafetyissues,ifany,associatedwiththeiruse.It

8、istheresponsibilityoftheuserofthesestandardstoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SEMImakesnowar