单项选择题
A.1.1:1B.1.3:1C.1:1D.1.2:1
A.倒装焊B.热压键合C.引线键合D.载带自动焊
A.陶瓷框架B.封装盖板C.粘接底座D.键合引线
A.65%Sn-35%PbB.10%Sn-90PbC.35%Sn-65%PbD.90%Pb-10%Sn
微信扫一扫,加关注免费搜题