Robert Welch wrote:
>
> Annie,
>
> Since you said oxidized, I'm afraid the condition you describr is due
> to high lead content in the gold bath.  Almost all automatic Ni/Au
> machines drag in a  small amount of lead into the gold bath,
> regardless of how well everything is run.  Because of this the
> gold bath itself must eventually be either treated for lead or
> replaced.  I'm realy not sure if there is a functional impact.
> Robert E. Welch

If your problem really is lead contamination, do a lead treatment, then
tin/lead strip your boards before gold plate, preferably after solder
resist and then HASL.
Roger Hammond

##############################################################
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.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
##############################################################