半导体器件的机械标准化 第6-21部分:表面安装半导体器件封装外形图绘制的一般规则 小外形封装(SOP)尺寸测量方法
Mechanical standardization of semiconductor devices - Part 6-21: General rules for the preparation of outline drawings of surface mounted semiconductor device packages - Measuring methods for package dimensions of small outline packages (SOP)