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when SRT rework bga cause serounding tant cap color burn [复制链接]

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离线wilson67
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只看楼主 倒序阅读 使用道具 楼主  发表于: 2009-07-08
When SRT rework BGA serounding tant cap can turn brown color ( burn) .how to prevent this burn.
i try to use kapton tape and high temp rubber glue still can't solve the problem.
Anybody can help or solution?
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离线nestor
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升级剩余时间:45小时在线等级:26
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升级剩余时间:45小时在线等级:26
在线时长:4005小时
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只看该作者 沙发  发表于: 2009-07-08
The beginning of soldering; this in turn has led to a number of commonsense ...... colourchange,from white to brown or black, or from one colour to another. Setsof ...... Peck, D.J. (1997) BGA Rework – Issues and Answers. ...... too much solder at the ends of a melf or chip-capacitor can cause the ceramic body ...

Some references may help.
SMT Soldering Handbook
http://www.home-machine-shop.com/Down-Load/SMT_Soldering_Handbook.pdf