Subject: | |
From: | |
Date: | Thu, 24 Jul 1997 15:42:14 -0700 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
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.
>
>
>***************************************************************************
>* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
>***************************************************************************
>* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
>* with <subject: subscribe/unsubscribe> and no text in the body. *
>***************************************************************************
>* If you are having a problem with the IPC TechNet forum please contact *
>* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
>***************************************************************************
>
>
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
* with <subject: subscribe/unsubscribe> and no text in the body. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
***************************************************************************
|
|
|