半导体器件的机械标准化 第6-3部分:表面安装半导体器件封装外形图绘制的一般规则 四边扁平封装(QFP)的尺寸测量方法
Mechanical standardization of semiconductor devices - Part 6-3: General rules for the preparation of outline drawings of surface mounted semiconductor device packages - Measuring methods for package dimensions of quad flat packs (QFP)