At 14:26 28.05.98 -0500, you wrote:

>What is FR1  and how does it differ from FR4?

Just my topic!

FR1 is very similar to FR2, both are UL94-V0, both use a phenolic resin as
binder. The only difference to FR2 is the phenolic resin, which is a
different type. FR1 is mainly cold punchable and has a slightly better
operation temperatur. Therefore, many laminate maker which produce FR1 do
not produce FR2. Also, FR1 prices are the same as FR2.

I consider myself as having some knowledge about laminates - still, I can't
tell the difference between FR1 + FR2.

FR4 is a glass epoxy material and is completly different.

Jens Behrens

Want to know more about laminate?   http://www.felsweb.com/lam_faq.htm
Laminate FAQ



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