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February 2004

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Subject:
From:
"Scott B. Westheimer" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 4 Feb 2004 10:44:53 -0500
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I do not see why you can not just use the boards as is. Trying to rework
boards and putting them again through HASL will only increase the
possibilities for trouble. The gold plated areas will be covered with solder
when you put them through you wave so you are basically doing in house what
you board supplier is trying to do during rework.

Scott Westheimer
----- Original Message -----
From: "Ezequiel Cruz" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, February 04, 2004 9:47 AM
Subject: [TN] Rework Gold Finish


> Can anyone help with the following:
>
> My board house built my boards with a gold finish.
> The finish should have been selective gold as we have some contact areas
on
> the pwb.
>
> I have insisted on a re-build which is currently being done. However,
> because of our all ready late schedule, the board house has offered to re-
> work the gold finish boards for us. The method explained to me was mask
the
> selective gold areas and flux clean the remaining board while dipping in
> molten solder.
>
> Does anyone have any experience with re-working this way. Our biggest
> concern is from a re-liability standpoint. Obviously this board will go
> through additional thermal cycling not necessarily part of a standard
> build. What effect, if any, will this have on the board itself. Remember
> that our stuffing house will place this board through additional thermal
> cycling.
>
> Any help is greatly appreciated.
>
> Ezequiel Cruz
>
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