8 SMT工艺介绍

SMTSMT1.160%SMT/(snapoff)(SolderPaste)PCB(squeegee):(smeared)(stencil):(additive)()()()SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,1SMT1.2SMTSMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,2SMT2.12.1.1ICBGA44mm44mmTapeFeeder56mm44mmTapeFeeder2.1.2()2.1.32.1.42.1.52.1.62.1.78mmFeederSMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,3SMTSMTPCBPCB3.1(SolderBalls)1PCB23PCB4567890.13mm0.13mm600mm(Bridging)(Open)123()4()Sn/Pb3.2SMTSMTSMTSMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,4SMTSMT3.2.1.1234512345673.2.212343.2.3SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,5SMT3.2.412342.3.412m(QFPQuadflatpacks)(9)().3.2.5SMT124101;2;3;4;5;6;7;8;9;10;11;12131415SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,6SMT3.2.6SMT.()(11).1;2;3;4;5;6;7;8;9;10;11;12;133.2.7(QFP)(12)QFP/()3.2.8TombstoningTombstoning()TombstoningManhattanDrawbridgingStonehengeSMT1234567SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,7SMT3.2.9BallGridArray(BGA)BGABGA;62636263633.2.10SMT(0.0005/0.01)LCCCLCCC(213).:1/;2;3;4.5.BGA(14)..63BGA.BGA;SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,8SMT.BGA..BGASMTSMTTombstoningBGA.SMT1.BGA63Pb/37Sn110C~130C60Sec130C~160C45~90Sec183C~183C60~90Sec2155C2C/Sec2.(Popcorn)PCBIC...PCB.PCBPCB(4M):SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,9SMT4.120cm30cm4.24.2.14.2.2:1-24.2.3:4.2.4:454.2.5:451~2(1):(2)(3)SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,10SMT2~~4(2)4.31221034.4(1)SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,11SMT(2)(3)(4)(a)(b)(c)(d)(e)45(5)(6)0.50.81.05.0mmSMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,12SMT(7)(8)300.4.54.5.14.5.2(1)SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,13SMT(2)3~47Kg/cm10%()(3)(1)()(2)(3)(4)()()4.5.3SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,14SMT4.5.4()()SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,15SMT12123.1.80%1231231.1.123.123.12.()12.12.SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,16SMT1231.()1.5.1.BAB()5.2.(KV)3515120.2560.170.6201.2SMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,17SMT181.55.3::1.()2.()3.(/)()5.4ESDESDElectroStaticDischargeESD()()()(EMI)(EMC)5.55.6100K1MSMTSMTSMT,SMT,SMT,SMT,SMT,SMT,SMT.SMT,,,18