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大小:10.20 MB
页数:69页
时间:2021-04-20
《SMTPCBA品质检验标准.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、....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:..资料.......NO版本修订页次发行日期修订容修改人批准人1A2013.5.15目录..资料.......1围.................................................................42规性引用文件.......................................................43术语和定义..................
2、........................................43.1冷焊点..........................................................44回流炉后的胶点检查...................................................45焊点外形.............................................................5.1片式元件——只有底部有焊端........
3、...............................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.................................................37-386元
6、件焊端位置变化.....................................................38-39..资料.......7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)...................................
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