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Subject:	Re: Removing a layer
From:	Brian Ellis <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 2 May 2003 18:09:05 +0300
Content-Type:	text/plain
Parts/Attachments:	text/plain (41 lines)

As it is polyimide, if the adhesive is also polyimide (not always the
case), chemical ablation may also be an answer. Make a dam with RTV or
similar round the area to ablate and add a drop of strong sodium
hydroxide with an eye-dropper, after a few minutes, suck it up again and
repeat until you hit copper, then rinse thoroughly with DI water.

Brian

Joe Fjelstad wrote:
> Hello Michael,
>
> Have you considered using a laser to ablate the polymers? There are a
> number of laser service companies in the US that could make a clean job
> of it.
>
> Good luck with the project,
> Joe ---------------------------------------------------
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