SMT工艺简介

„„QFPQFPBGABGAFineFinePitchPitch„„FinePitchFinePitch„„ReflowReflowSMTSMT„„3.3.SnSn--PbPb2.2.SnSnPbPbFluxFlux1.1.(Flux)==++1.1.(())2.2.//3.3.FluxFlux()0.10.10.2~0.150.2~0.150.20.2((mm)mm)2~12~1((kg/cmkg/cm22))20~1020~1030305050((mm/sec)mm/sec)00000.3~0.50.3~0.5((mm)mm)0.12~0.150.12~0.150.22~0.250.22~0.250.30~0.350.30~0.35((mm)mm)0.08~0.100.08~0.100.18~0.150.18~0.150.20.2((mm)mm)160~200160~200180~220180~220200~250200~250((Pa.s)Pa.s)3030mm5050mm7575mm::::0.30.3mmmm0.50.5mmmm0.650.65mmmmQFPQFP(())REFLOW()1.1.2.2.1.1.2.2.3.3.4.4.5.5.1.1.2.2.(())3.3.1.1.2.2.1.1.FluxFlux2.2.3.3.1.1.2.2.FluxFlux3.3.FluxFlux1.1.2.2.