All,
While you are all on the subject of ENIG plating soldering issues. Take a
look at these examples of solder pads that are not salvageable. This
failure took place in the wave solder process. Currently we are waiting
failure analysis results.

Hype link to pictures as follows...
Click on thumbnails to see larger views.
http://www.ripus.com/images/pwa/index.htm

Regards,
Frank Norman
Manufacturing Support Engineer
Raytheon, Space and Airborne Systems (SAS)
(805)879-2745
[log in to unmask]





Dave Hillman <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
08/11/03 12:30 PM
Please respond to "TechNet E-Mail Forum."; Please respond to ddhillma


        To:     [log in to unmask]
        cc:
        Subject:        Re: [TN] Black pad


Hi Werner! We have tried to use our ROSA system to electrochemically
reduce
the degraded nickel surfaces with no success (nickel oxide/corroded nickel
is tough stuff!). I have not heard of anyone being able to restore a
"black
pad" surface successfully without having collateral damage to adjacent
regions of the printed wiring assembly.

Hey Rudy S.  - is there a chemical treatment potential/possibility?

Dave Hillman
Rockwell Collins
[log in to unmask]



                      Werner Engelmaier
                      <[log in to unmask]        To:
[log in to unmask]
                      OM>                      cc:
                      Sent by: TechNet         Subject:  [TN] Black pad
                      <TechNet@listserv
                      .ipc.org>


                      08/11/2003 02:09
                      PM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to
                      Engelmaier






Hi All,
Are there any successful rework procedures for 'black pad'?

Werner Engelmaier

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