1.smt概述和smt工艺流程.ppt

SMT:surfacemounttechnologyPTH:pinthroughtheholeSMB：surfacemountprintedcircuitboardSMC：surfacemountcomponentSMD:surfacemountdeviceSMA：surfacemountAssembly表面安装组件CTE:coefficientofthermalexpansion热膨胀系数