Rexolite is a good material for low loss applications (high frequency).  Its
often used as a dielectric lens for millimeter wave
radiometers.  The biggest problem we had with clad flat stock dealt with
warpage after etch.  If more copper is removed on one side versus the other
you will likely get potato chipping. There is a fairly detailed procedure to
straighten after etch with involves both cold
(-40 deg c ) to warm excursions while clamped flat. The vendor supplied the
data sheet when we had this problem.  Lastly, it
is not as robust as FR4 and their is no glass support internal to the resin
matrix.  Rough handling at any stage will cause cracking.

Good Luck, { I mean..., Good Process Control :) }

Ron VandenDolder
Plant Services/ Product Development Support
Telaxis Communications
SouthDeerfield.MA. 01373
413-665-8551


----Original Message-----
From: Steve Kelly [mailto:[log in to unmask]]
Sent: Wednesday, July 03, 2002 2:58 PM
To: [log in to unmask]
Subject: [TN] Rexolite



We have been asked to make a circuit for a customer using "rexolite" ( MADE
BY C-LIC PLASTICS - a polystyrene base material) -. Should I have any
concerns about drilling this material, routing it , soldermask adhesion. Any
pointers would be appreciated. Regards Steve Kelly

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