Yee,

I can't speak regarding BT resin systems because I do not often deal with them but, PTH on PTFE
materials is easily accomplished using standard electroless copper and direct metalization
techniques. I would not necessarilly suggest making any changes to your standard electroless
process.  However, since the PTFE surface has a very low surface energy it is necessary to treat
the PTFE surface prior to PTH.  Plasma treatment and sodium based chemistries are typically used
to treat the PTFE surface in the drilled hole to provide wettability for the PTH chemistry.
Once, the PTFE material is treated any PTH chemistry utilizing a cleaner and polymer
conditioning component as the first process step should work.  There are well over 50 shops
within the U.S. alone which do this successfully on a regular basis.

If you would like additional information please contact me directly @ 630-834-8676.

Regards,
John Bushie
Technical Services Manager
Taconic Advanced Dielectric Division
--- On Tue, 14 Jul 1998 18:19:55 PST  tgyee <[log in to unmask]> wrote:
     Hi Technetters,

        I am trying to get opinions on how to do electroless copper plating
     on BT and Teflon materials. Specifically, what are the parameters that
     I would have to change in my current process for the new materials, or
     do I have to consider a totally new chemistry.

        We are currently running Shipley 3000 electroless copper. Any ideas
     are welcome.

     Regards
     Yee T.G.

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---------------End of Original Message-----------------

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Name: John Bushie
E-mail: John Bushie <[log in to unmask]>
Date: 07/14/98
Time: 08:02:57

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