半导体器件的机械标准化 第6-18部分:表面安装半导体器件封装外形图绘制的一般规则 焊球阵列封装(BGA)的设计指南
Mechanical standardization of semiconductor devices –?Part 6-18: General rules for the preparation of outline drawings of surface mounted semiconductor device packages – Design guide for ball grid array (BGA)