CapillaryDesignFundamental+for+Taiwan

WireBondingTechnologyPTDGroupCapillaryDesignFundamentalsCapillaryCapillaryDesignDesignFundamentalsFundamentalsWireBondingTechnologyPTDGroupNomenclatureNomenclatureHCDCATFAORMTABNABNHHoleDiameterChamferDiameterChamferAngleTipDiameterFaceAngleOutsideRadiusMainTaperAngleBottleneckTaperAngleBottleneckHeightWDBPPBPOLHFABMBDMBHBCDEFOWireDiameterBondPadPitchBondPadOpeningLoopHeightFreeAirBallMashedBallDiameterMashedBallHeightBallContactDiameterElectricFlameOffAdivisionoftheSPTRothGroupAdivisionoftheSPTRothGroupWireBondingTechnologyPTDGroupLHWDBPPMBDBPOBHNomenclatureNomenclatureAdivisionoftheSPTRothGroupWireBondingTechnologyPTDGroupFreeAirBallFreeAirBall(BallFormation)(BallFormation)FreeAirBallMashedBallWireBondingTechnologyPTDGroupFreeAirBall=MashedBallFreeAirBall=MashedBallFreeAirBallMashedBallVolFAB=VolMBVolFABVolMBWireBondingTechnologyPTDGroupFAB=MBVolumeEquation(Empirical)FAB=MBVolumeEquation(Empirical)VolFAB=VolMBFABØCDCAHMBDMBHWDππππFABØ3/6=ππππH2(H-WD)/4+ππππ(CD3-H3)/24tan(0.5CA)+ππππMBD2(MBH)/4FABØ3=3H2(H-WD)/2+(CD3-H3)/4tan(0.5CA)+3MBD2(MBH)/2FABØ3=1.5H2(H-WD)+(CD3-H3)/4tan(0.5CA)+1.5MBD2(MBH)WireBondingTechnologyPTDGroupFreeAirBallFreeAirBall(FAB)(FAB)

AffectballheightAffectballheight

AffectballsizeAffectballsize

AffectballshearstrengthAffectballshearstrengthWireBondingTechnologyPTDGroupCapillarydimensionsaffectstheCapillarydimensionsaffectstheballbondballbondformationformationCDHCA1stBond(Ball)WireBondingTechnologyPTDGroupHoleSizeHoleSize(H)(H)HWDH=WD+40%±10%Recommended:H=1.4WDForFinePitch:H=1.3WD(min)Ultra-finePitch=1.2WD(min)MfgStandardHoleSize:25,28,30,33,35,38,41,43,46,51,64,68,75,84,90,100,127,178µmWireBondingTechnologyPTDGroupHHHoleSizeHoleSize(H)(H)

AffectloopingperformanceAffectloopingperformance

AffectwirefeedingAffectwirefeeding

Affectrateofbuild-upAffectrateofbuild-upWireBondingTechnologyPTDGroupChamferDiameterChamferDiameter(CD)(CD)MBD(min)=CD+10%CDMBD/1.1(BPO-*10µm)/1.1≥≥≥≥H+10µm[std]≥≥≥≥H+8µm[ufPitch]*10µmclearanceincludesmachine/operatorerror,capillarytoleranceBPOMBDCDWireBondingTechnologyPTDGroupCDCDChamferDiameterChamferDiameter(CD)(CD)

AffectballcenteringAffectballcentering

AffectsquashedballsizeAffectsquashedballsize

AffectsquashedballshapeAffectsquashedballshape

AffectstitchbondstrengthAffectstitchbondstrength

UselargestpossibleCDforUselargestpossibleCDforgoodballshearreadinggoodballshearreading

LargerCDresultsinsmallerLargerCDresultsinsmallerwedgebondareawedgebondareaWireBondingTechnologyPTDGroupChamferAngleChamferAngle(CA)(CA)CDMBDMBDCDCA(70°)CA(120°)BiggerCA-BiggerMBD*WiththesameCD,H,FAB&WDSmallerCA-SmallerMBDWireBondingTechnologyPTDGroupMBDMBDForsmallerChamferAngle(CA),thelargertheFABvolumethatcanbecontainedinsidethechamfer,thusresultinginasmallerballsizeChamferAngleChamferAngle(CA)(CA)WireBondingTechnologyPTDGroup

AffectballcenteringAffectballcentering

AffectsquashedballsizeAffectsquashedballsize

AffectsquashedballshapeAffectsquashedballshape

AffecttailbondAffecttailbondChamferAngleChamferAngle(CA)(CA)θθθθθθθθWireBondingTechnologyPTDGroupInnerChamferInnerChamfer‘‘ICIC’’FunctionFunctionFABCenteringResultantfromUSTransferWireBondingTechnologyPTDGroupInnerChamferInnerChamfer‘‘ICIC’’FunctionFunction‘TailTack’fortailformationICICWireBondingTechnologyPTDGroupInnerChamferInnerChamfer‘‘ICIC’’FunctionFunction

AffectballcenteringAffectballcentering

AffectsquashedballsizeAffectsquashedballsize

AffectsquashedballshapeAffectsquashedballshape

AffecttailbondAffecttailbondICICWireBondingTechnologyPTDGroupCapillarydimensionsaffectstheCapillarydimensionsaffectsthestitchbondstitchbondformationformation2ndBond(Stitch)ORFATWireBondingTechnologyPTDGroupStitchLengthformedbyT,CDandORStitchLengthformedbyT,CDandORWDORSLTWireBondingTechnologyPTDGroup‘‘OROR’’--‘‘FAFA’’CombinationCombinationSmallerFABiggerORORORFAFABiggerFASmallerORWireBondingTechnologyPTDGroup‘‘OROR’’--‘‘FAFA’’CombinationCombinationWirepullStrengthComparisonforDifferentFA-ORCombination0.002.004.006.008.0010.0012.0014.00M/SFA11OR30FA11OR38FA11OR20FA4OR30FA4OR38FA4OR20FA8OR30FA8OR38FA8OR20FA15OR30FA15OR38FA15OR20WirepullStrength(Stitch),gmfAveMinMaxWireBondingTechnologyPTDGroup‘‘OROR’’basedonTipDiameter(T)basedonTipDiameter(T)ORFAWDTOR360µm330µm-300µm250µm-200µm180µm-165µm150µm-130µm120µm-110µm100µm-75µm70µm-65µm60µm-55µmT=75µm=64µm=51µm=38µm=30µm=20µm=12µm=10µm=8µmWireBondingTechnologyPTDGroupFaceAngleOutsideRadiusFaceAngleFaceAngle

AffectswedgebondAffectswedgebondstrengthandshapestrengthandshape

Standard8degfornon-Standard8degfornon-bottleneck(T150bottleneck(T150µµm)m)

11gegforfinepitchSBN11gegforfinepitchSBN(T165)(T165)OutsideRadiusOutsideRadius

AffectswedgebondAffectswedgebondstrengthandheelshapestrengthandheelshape

RefertoT-ORtableRefertoT-ORtableWireBondingTechnologyPTDGroupTipDiameterTipDiameter(T)(T)StitchLengthBig‘T’Small‘T’WireBondingTechnologyPTDGroupTipDiameterTipDiameter(T)(T)T(max)=2BPP-WD-2(CLH-MBH)tan(TA/2)-e*CLH-MBHBPP-WD/2-T/2-e*TA/2Tan(TA/2)=BPP-WD/2-T/2-e*CLH-MBH*clearanceforoperatorandmachi