Ted: There is nothing wrong with specifying higher Tg board material but it
is just part of the equation. You also need higher temperature ratings and
times for decomposition and delamination properties. Also reduced CTE for
higher layer count boards.
So some of the early lead-free laminate materials are being replaced with
newer generation higher performance products.


Regards

Michael Barmuta

Staff Engineer

Fluke Corp.

Everett WA

425-446-6076

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ted Kong
Sent: Monday, March 14, 2005 2:10 PM
To: [log in to unmask]
Subject: [TN] Board material for RoHS compliant


Hi All,

Just heard that specifying high Tg for Lead-Free RoHS
compliant raw board is not the correct thing to do.
Does anyone have more info on this?

Regards,

Ted Kong



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