TECHNET Archives

July 1997

TechNet@IPC.ORG
Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
Re: SHORTS AT ELEVATED TEMPERATURE IN DOUBLE SIDE BOARDS.
From:
Barbara Burcham <[log in to unmask]>
Date:
Thu, 24 Jul 1997 15:42:14 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (50 lines) 
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]      *
***************************************************************************

ATOM RSS1 RSS2