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November 1997

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Subject:
From:
Lenny Kurup <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Tue, 25 Nov 1997 15:35:16 -0500
Content-Type:
TEXT/PLAIN
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TEXT/PLAIN (46 lines)
ASSUMING A SOLDER RESIST IS USED AND IN-LINE STRIPPING IS CARRIED
OUT. ADDITIONALLY, THE DEPOSIT WILL SHOW THE OFF-COLOUR, IF LEAD
CONTAMINATED, UPON EXIT OF THE TAB PLATER.

THX,
LENNY KURUP
On Tue, 25 Nov 1997, 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
> Process Specialist
> Email: [log in to unmask]
> Modem: 804-239-9120
> Fax:   804-237-3048
>
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