SPT 劈刀设计

BasicCapillaryDesignPTDGroupBasicCapillaryDesignRules（劈刀基本设计规则）BasicCapillaryDesignPTDGroupTheFreeAirBall‘FAB’iscenteredinsidethecapillarychamfer.（金球被真空吸入劈刀内切角处）BondingSequence（焊线顺序）Cycle1（第一步）:BasicCapillaryDesignPTDGroupBallBondFormation（球形形成）BondingSequence（焊线顺序）Cycle2（第二步）:BasicCapillaryDesignPTDGroupAfterloopingformation,cycleperformsstitchbondprofile.（弧度形成后，焊接第二焊点）BondingSequence（焊线顺序）Cycle3（第三步）:BasicCapillaryDesignPTDGroupTailFormation（尾丝形成）BondingSequence（焊线顺序）Cycle4（第四步）:BasicCapillaryDesignPTDGroupDetachtailfromthestitch.（从第二焊点处拉断尾丝）BondingSequence（焊线顺序）Cycle5（第五步）:BasicCapillaryDesignPTDGroupFreeAirBall‘FAB’Formation（打火烧球形成金球）BondingSequence（焊线顺序）Cycle6（第六步）:BasicCapillaryDesignPTDGroupCapillaryTravelPathFormingaTypicalLoopProfile（劈刀行程路线形成弧度形状）LoopingFormation（弧度形成）:BasicCapillaryDesignPTDGroupCapillarydimensionsaffectstheballbondformation（影响第一焊点的劈刀尺寸参数）:TFAHCDOR1stBond(Ball)（变形后的金球）CABasicCapillaryDesignPTDGroupHoleSize(H)（孔径）HWDH（孔径）=WD（线径）+40%±10%Recommended（推荐）:H=1.4WDForFinePitch（小间距）:H=1.3WD(min)BasicCapillaryDesignPTDGroupChamferDiameter(CD)（内切角直径）:CDMBD（变形后的金球直径）/1.2(BPO铝垫开窗-*10µm)/1.2H孔径+10µm*10µmclearanceincludesmachine/operatorerror,capillarytolerance（10µm包含设备/操作者的误差，劈刀尺寸的公差）CDMBDBasicCapillaryDesignPTDGroupChamferAngle(CA)内切角角度:CDMBDMBDCDCA(70°)CA(120°)Bigger（大）CA-BiggerMBD*Withthesame（相同）CD,H,FAB&WDSmaller（小）CA-SmallerMBDBasicCapillaryDesignPTDGroupInnerChamfer‘IC’Function（内切角的作用）FABCentering（金球定中心）ResultantfromUSTransfer（与超声波传递的界面）BasicCapillaryDesignPTDGroupTFAORCapillarydimensionsaffectsthestitchbondformation（影响第二焊点的劈刀尺寸参数）:2ndBond(Stitch)BasicCapillaryDesignPTDGroupStitchLengthformedbyT,CDandOR（鱼尾长度由T,CDandOR形成）WDORSLTBasicCapillaryDesignPTDGroup‘OR’-‘FA’Combination（结合）:Smaller（小）FABigger（大）ORORORFAFABigger（大）FASmaller（小）ORBasicCapillaryDesignPTDGroupStitchProfilebasedonOutsideRadius(OR)（第二焊点形状基于外切角半径）：Reducedweld(stitch)lengthforbigOR（大OR减少鱼尾长度）WDORORBasicCapillaryDesignPTDGroupMaximumComputed‘OR’（最大的计算OR）OR(max)=[(T-CD)/2]{cos(TA/2)/cos(TA/2+FA)}tan[(90+TA/2+FA)/2]OR(max)(T-CD)/2TA/2FABasicCapillaryDesignPTDGroup‘OR’basedon（基于）TipDiameter(T):ORFAWDTOR360µm330-300µm250-200µm180-165µm150-130µm120-110µm100-75µm70µmT=75µm=64µm=51µm=38µm=30µm=20µm=12µm=10µmBasicCapillaryDesignPTDGroup‘CD’–Termination（终止）oftheStitch(鱼尾）:BasicCapillaryDesignPTDGroupFirstBond(BallFormation):第一焊点形成FreeAirBallMashedBallBasicCapillaryDesignPTDGroupFreeAirBall空气球=MashedBall变形球:FreeAirBallMashedBallDiameterFABØMBDVol体积FAB=Vol体积MBDVolFABVolMBBasicCapillaryDesignPTDGroupFreeAirBall空气球=MashedBall变形球（体积）FABØVolFAB=VolMBCDCAHMBD123VOL2VOL3++VOLFAB=VOL1=3H2(H-WD)/16VOL1VOL2=(CD3-H3)/24tan(0.5CA)VOL3=MBD2(MBH)/4MBHWDVOLFAB=FABØ3/6++=BasicCapillaryDesignPTDGroupFAB=MBVolumeEquation综合:VolFAB=VolMBFABØCDCAHMBDMBHWDFABØ3/6=3H2(H-WD)/16+(CD3-H3)/24tan(0.5CA)+MBD2(MBH)/4=FABØ3=18H2(H-WD)/16+(CD3-H3)/4tan(0.5CA)+3MBD2(MBH)/2BasicCapillaryDesignPTDGroupCritical（临界）LoopHeight(CLH):CLHBNAHighReverseLoopNormalLoopBasicCapillaryDesignPTDGroupTipDiameter(T):TT(max)=2BPP-WD-(2LH-WD)tan(TA/2)-24BPPWDLHTA(MTAorBNA)LH-WD/2BPP-WD/2-T/2-clearanceTA/2Tan(TA/2)=BPP-WD/2-T/2-clearanceLH-WD/2BasicCapillaryDesignPTDGroupTipDiameter(T):TT2BPP-WD-(2LH-WD)tan(TA/2)-24TCD+2ORBPPWDLHTA(MTAorBNA)ORBasicCapillaryDesignPTDGroupTipDiameter(T):TA/2WD+clearance(e)T/2abBPPLH-MBHT/2=BPP-a-bT(max)=2BPP-(WD+e)cos(TA/2)-{2LH-2MBH-WD-e+(WD+e)sin(TA/2)}tan(TA/2)T/2=BPP-[(WD+e)/2]cos(TA/2)-{LH-MBH+(WD+e)/2+[(WD+e)/2]sin(TA/2)}tan(TA/2)Tangentialassumption...TA/2(WD+e)/2