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June 2007

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Subject:
Re: DFM 请教
From:
Rambo Li <[log in to unmask]>
Reply To:
Asia Committe Task Group Forum <[log in to unmask]>, [log in to unmask]
Date:
Tue, 26 Jun 2007 15:40:18 +0800
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1:1.2   Perfect









Lily Zhu <[log in to unmask]> 

Sent by: TGAsia <[log in to unmask]>

06/26/2007 03:20 PM

Please respond to

Asia Committe Task Group Forum <[log in to unmask]>; Please respond to

Lily Zhu <[log in to unmask]>





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Subject

[TGA] DFM 请教













各位,



请教一下, PCBA板中通孔的直径和安放在通孔里的元器件引脚的直径比例在一个怎样

的范围比较好?



现在遇到一个问题, 元件的引脚比较细, 过波峰焊后焊锡在通孔里爬升情况不好, 摇

一摇元件身体部分, 引脚就会松动. 在更换了活性较强的助焊剂后, 情况不见好转. 



欢迎各位大侠出谋划策, 谢谢!

Lilyzhu

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