Another option employed frequently is to test prior to applying Entek.
     The Entek process will not cause any problems with the panels if
     followed properly.

     Mike Doty
     P.E.
     Hadco TC3


______________________________ Reply Separator _________________________________
Subject: Re: [TN] IN CIRCUIT TEST
Author:  etgar dimaculangan <[log in to unmask]> at SMTPLink-Hadco
Date:    1/23/99 6:57 AM


Enthone CU106A is an organic coating applied after continuity test prior to
visual inspection. The coating thickness ranges from 0.3~0.5 microns so it
can be easily removed by pins during probe testing. Storing the boards with
punctures would create oxidation/discoloration that would take affect
during the assembly process. Scrubbing the surface of the finish with even
a cloth can reduce the thickness but muchsoever avoid contaminating the
board with alcohol because it totally strips the application.

Regards,
Etgar D
----------
> From: Don E Steffen <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] IN CIRCUIT TEST
> Date: Saturday, January 23, 1999 2:30 AM
>
>      Greetings Techno's
>
>      We are developing a process with organic coating. The organic
coating
>      we have selected is Enthone CU106A. I have been told there is some
>      testability issues with organic coating. The Gage R&R data from what
I
>      have been told is > 30% with organic coating.
>
>      Does anyone out there have any experience with testability and
>      repeatability with organic coated boards?  What are the issues I
need
>      to be aware of as I am doing my PFMEA? Are there special Po-Go pins
>      used for this type of coating?
>
>      Please let me know!
>
>      Desperate in Indiana!
>
>      Donn Steffen
>
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