摘要: 1、机械孔直径一般为10mil(0.254mm),焊盘22mil(0.5588mm) ;极限值为8mil(0.2032mm),焊盘16mil(0.4064mm);孔直径6mil(0.1524mm,)焊盘12mil(0.3048mm)虽可以打样制作,但难度系数较大,且打X板子会比较多,不适宜批量量产 阅读全文
posted @ 2020-11-04 11:03 aerguqiuhui 阅读(1938) 评论(0) 推荐(0) 编辑