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July 1997

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Subject:
From:
Barbara Burcham <[log in to unmask]>
Date:
Thu, 24 Jul 1997 15:42:14 -0700
Content-Type:
text/plain
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Was is class at The Copper Connecton in San Jose where saw a video of an
occurance of the growth of metal across a narrow space conductor to
conductor with out solder mask coverage in an environment with elevated
humidity.         
check your circumstances--this was an amazing video---actually saw growth.





At 06:28 PM 7/24/97 +0500, B.R.SHASHIRAJ wrote:
>Hello Technetters,
>        Can some one out their throw some light on below mentioned problem
>,probable causes and solutions.
>       1. this defect noticed on 1.6mm double sided board, smobc,hal finish.
>       2. after assembly and while testing at elevated temperature noticed 
> shorts during test cycle on the solder side between connector pads and trace 
>running thro.
>       3.unable to figure out ,this shorts appear of very little dimension and
>are very small compared to pad /trace.
>     
>      can some one figure what this cud be and why
>  THANKS.
>
>BYE.
>                  
>
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