標(biāo)題: DRAM構(gòu)裝體Warpage定義 [打印本頁(yè)] 作者: nickita 時(shí)間: 2010-8-31 17:18 標(biāo)題: DRAM構(gòu)裝體Warpage定義 1. If the coplanarity of solder ball exceeds 4Mil, it will be rejected.
2. If the package coplanarity diverge from Warpage-Factor criteria, it is also rejected.
P.S. Warpage-Factor(WF) = PKG warpage / PKG length