SMT不良缺陷诊断分析与解决方案(ppt 42页)
SMT不良缺陷诊断分析与解决方案(ppt 42页)内容简介
内容摘要
SMT焊点的缺陷种类繁多,其形态也形形色色.常见的SMT焊点缺陷有:
1、冷焊(coldsoldering)2、拉尖(lcicle)
3、虚焊(pseudosoldering)4、孔洞(void)
5、锡珠(solderingballs)6、脱焊(opensoldering)
7、偏移(excursion)8、焊点剥离(solder-off)
9、竖件(Setcomponent)10、翻件(turn)
11、错焊(solderwrong)12、助焊剂残留(fluxresidue)
13、漏焊(solderskips)14、焊料裂纹(soldercrazeing)
15、反向(reverse)16、桥接(连锡或短路solderbridge)
17、焊点锡多(excesssolderconnection)
18、焊点锡少(insufficientsolderconnection)
..............................
SMT焊点的缺陷种类繁多,其形态也形形色色.常见的SMT焊点缺陷有:
1、冷焊(coldsoldering)2、拉尖(lcicle)
3、虚焊(pseudosoldering)4、孔洞(void)
5、锡珠(solderingballs)6、脱焊(opensoldering)
7、偏移(excursion)8、焊点剥离(solder-off)
9、竖件(Setcomponent)10、翻件(turn)
11、错焊(solderwrong)12、助焊剂残留(fluxresidue)
13、漏焊(solderskips)14、焊料裂纹(soldercrazeing)
15、反向(reverse)16、桥接(连锡或短路solderbridge)
17、焊点锡多(excesssolderconnection)
18、焊点锡少(insufficientsolderconnection)
..............................
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