A qualified, well process managed board shop does not commit to relamination
unless all inner layer circuitry (details) are defect free. Many causes for
shorting and opens as nicks, pits, dents, over etch, under etch, and all the
rest relating to process management, or not, and handling.

Earl Moon
----- Original Message -----
From: Nicholas LAI <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 27, 1999 9:32 PM
Subject: [TN] Nick circuit can't detect.. Problem


>
>
> There is some problems I cannot be solve... Hope all of your can help
me...
>
> (1)We found that there is many board can be escape from E-test...
> After micro-section analysis, we found that there is still base copper on
trace
> open location.
> We can said that the problem is dish down ... There is still connected but
the
> resistance is greater than normal one...
>
> What is the cause of this defect?
> Is there any reliable method to detech it?
> Is there any apparatus can detech the nick circuit problem expect AOI.?
>
> (Embedded image moved to file: pic22705.pcx)
>
> Best Regard,
> nicholas lai
>
>
>

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################