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May 1999

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Subject:
From:
Alok Bose <[log in to unmask]>
Reply To:
"TechNet E-Mail Forum." <[log in to unmask]>, Alok Bose" <[log in to unmask]>
Date:
Wed, 19 May 1999 10:41:21 -0400
Content-Type:
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text/plain (46 lines)
U.S.  EPA had funded a study to examine alternatives to the electroless
process. Although the focus of this exhaustive study was on environmental
impact,  there is useful information including user feedback on the
different making holes conductive (MHC) processes. Much of the data is
available on line : http://www.epa.gov/opptintr/dfe/pwb/pwb.html

If you are not inclined to print out a 400 page booklet on your printer,
they are also available free from their National Service Center (order
online). The publications I found useful were:

EPA 744-R-97-001    Implementing Cleaner Technologies in the PWB: MHC
EPA 744-R-98-004a  PWB Cleaner Technologies Substitutes Assessment: MHC
(BIG)
EPA 744-R-98-002    Alternative Technologies for MHC

There is a lot of verbiage. And, acceptance of conductive polymer  process
has been less than enthusiastic in the US. At the time this study was
conducted only one facility had adopted it, and process examined was
Atotech's Compact CP.

The person who has studied Atotech's Uniplate in detail, please post the
full text either at IPC's ftp site or zip it and make it available to us.

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