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September 2009

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Subject:
Re: Material Comparison
From:
Paul O Connor <[log in to unmask]>
Reply To:
(Designers Council Forum)
Date:
Fri, 25 Sep 2009 08:46:46 -0500
Content-Type:
text/plain
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text/plain (23 lines) 
Bob,
I have experience with FR370HR & FR406 for 8-12 layer heavy Cu (2 &amp; 3 oz)
PCBs with Blind/Buried via technology – exposed to lead free (+260C) reflow.
Found the FR370HR to be “bullet proof” the FR406 no so much - hole wall
cracking issues! Caveat – PCBs from 2 different fabricators, so not exactly
comparing like with like.
The FR370HR & the IS410 are both phenolic cured laminates giving a Td
(Decomposition Temp) in the region of +350Deg C, the IS410 is Dicy cured Td
is in the 300C range. If your design is similar to the spec above then I
would not choose IS410.

Rgds,
Paul O’ Connor CID+

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