欢迎来到天天文库
浏览记录
ID:23370010
大小:10.14 MB
页数:58页
时间:2018-11-06
《smtpcba品质检验标准》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、WORD格式可编辑SMTPCBA品质检验标准文件编号:版本:制修订单位:制修订日期:制定者:审查:核准:专业技术资料分享WORD格式可编辑NO版本修订页次发行日期修订内容修改人批准人1A2013.5.15目录1范围.................................................................4专业技术资料分享WORD格式可编辑2规范性引用文件.......................................................43术语和
2、定义..........................................................43.1冷焊点..........................................................44回流炉后的胶点检查...................................................45焊点外形.............................................................5.1片
3、式元件——只有底部有焊端.......................................5-65.2片式元件——矩形或正方形焊端元件——焊端有1、3或5个端面.........7-115.3圆柱形元件焊端..................................................12-155.4无引线芯片载体——城堡形焊端....................................15-175.5扁带“L”形和鸥翼形引脚.....................
4、....................18-225.6圆形或扁平形(精压)引脚........................................22-245.7“J”形引脚.....................................................24-285.8对接/“I”形引脚................................................28-305.9平翼引线..................................
5、......................315.10仅底面有焊端的高体元件.........................................31-325.11内弯L型带式引脚................................................32-345.12面阵列/球栅阵列器件焊点.........................................34-375.13通孔回流焊焊点...................................
6、..............37-386元件焊端位置变化.....................................................38-397焊点缺陷.............................................................7.1立碑............................................................407.2不共面.................................
7、..........................407.3焊膏未熔化.......................................................417.4不润湿(不上锡)(nonwetting).......................................417.5半润湿(弱润湿/缩锡)(dewetting)....................................417.6焊点受扰...............................
8、..........................427.7裂纹和裂缝........................................................427.8针孔/气孔........................................................437.9桥接(连锡).........................
此文档下载收益归作者所有