Possible got something to do with mirror reflectivity of the Ag. Just a wild guess :-)
--------------------------
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----- Original Message -----
From: Inge Hernefjord [mailto:[log in to unmask]]
Sent: Thursday, June 27, 2013 08:20 PM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [TN] repair of surface mount pads

Louis,

Why on earth and moon do you want Enig, when you have the opportunity to
get something that wets well? I have my doubts that you can repair with
Enig...if you are not a chemist freak..for some people the word '
impossible ' is not possble.
Inge


On 27 June 2013 14:39, Louis Hart <[log in to unmask]> wrote:

> Technetters, I have some unpopulated boards, each with a damaged
> 250-micron surface mount pad. The damaged pad can be, I am told, repaired.
> My concern is the surface finish: ENIG. Presumably the replacement pad will
> not have that finish. Is there a way to apply ENIG to the replacement pad?
> IPC-4552 amendment 2 proscribes electroplated gold for rework or repair of
> ENIG.   Thanks for any help.
>
> Louis Hart
> Compunetics
> Monroeville, PA
> USA
> [log in to unmask]<mailto:[log in to unmask]>
> 412-858-1232
>
>
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