700C no longer applies. 7711 and 7721 have been in place over a year.

Earl Moon
----- Original Message -----
From: Stephen R. Gregory <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, August 21, 1999 10:49 AM
Subject: Re: [TN] Rework spec on open circuit


> In a message dated 8/20/99 10:15:29 PM Central Daylight Time,
> [log in to unmask] writes:
>
> << Hello
>  Everyone.
>
>  I would like to know , is there any spec. on rework open trace on PCB
> Level....
>  How long of trace open can rework.?
>  How mant points can be rework per board?
>  etc....
>
>  Ps help me......to answer this question.....
>
>  Best Regard ,
>  Nicholas Lai
>  8/21/99 >>
>
> Hello Nicholas,
>
> The best place to get some direction on repairs is IPC-700C. It gives
> guidelines and instructions on how to do most any repair. What's going to
> really determine if you can repair a board, what types of repairs you can
do,
> how many repairs, etc., is the assembly itself. What does it do? What's
the
> environment that it will be operating in?
> Is it a production board that will be going to a customer? Or is it a
> prototype that is just trying to be proved out?
>
> Trace repairs can be kinda' tricky sometimes, using jumper wires may put a
> delay in the signal that could cause a high-speed designed board not to
> function properly, or cross-talk with other traces or act as a antenna and
> create noise in the circuit.
>
> Whenever a board has been damaged, a design engineer needs to determine
> whether or not a board can tolerate repairs. The IPC-700C is good to list
out
> the things that one needs to think about before attempting repairs. If it
is
> determined that a repair can be made, it also details how to go about it.
>
> Hope this helps,
>
> -Steve Gregory-
>
> ##############################################################
> 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
> ##############################################################

##############################################################
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
##############################################################