[SI-LIST] Why not Cytop as dielectric?

From: Peter Salmon <psalmon2000@xxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Date: Thu, 3 Mar 2005 20:09:31 -0800 (PST)

Hi list members,
 
As I observe the thread about Isola IS620, I wonder why Cytop has not generated 
more interest.  It is manufactured by Asahi Glass.  It has a dielectric 
constant of 2.1 and a loss tangent of 0.0007.  It's moisture uptake is <0.01% 
by weight.
 
I've applied for a patent on how to overcome its high CTE of 74 ppm/degree C on 
silicon or glass-epoxy substrates - requiring some unusual fabrication 
techniques.  They involve a gridded pair of dielectric materials patterned by 
imprinting, and would only be suitable for build-up layers.
 
Peter Salmon, owner of Sysflex, Inc., currently a one-man company.

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[SI-LIST] Why not Cytop as dielectric?

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