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Subject:	Re: How to de-populate a PWB?
From:	"Karnwal, Pankaj" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 7 Jun 2002 07:54:19 +0200
Content-Type:	text/plain
Parts/Attachments:	text/plain (42 lines)

Dear michelle

Yes ; It might be possible as per your process. but I think no need  dip in
to  any acid to etch off the rest solder .you can just do the re- wave
solder the board  with high flux and high conveyer speed after removing the
components(for removing components if you wet all the board from the flux it
might be done easily)  .and to find out the inner layer short you can sent
that board to your PCB mfgr. for bare board testing (BBT) .

> -----Original Message-----
> From: Michelle Huang [SMTP:[log in to unmask]]
> Sent: Friday, June 07, 2002 12:19 AM
> To:   [log in to unmask]
> Subject:      [TN] How to de-populate a PWB?
>
> Hi All,  How do you de-populate a PWB board without causing too much
> damage on the board's outer layer, that you can still measure the
> resistance of all of the traces?  I am looking for inner layer shorts on
> the PWB.
>
> I heard you can de-populate a board by placing the loaded board into a
> solder bath, and the components falls off automatically.  Then, put the
> board into an acid bath to etch off the solder on the surface of the
> board.  This method seems to etch out some of the outer traces.  Do any of
> you have suggestions to my assistance?  Your help will be greatly
> appreciated it.
>
>
> Michelle
>

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