In a message dated 05/16/2000 11:08:24 AM US Eastern Standard Time,
[log in to unmask] writes:

> Does anyone have experience with
>  polyfunctional FR4 that would care to comment?
>
>  Also, would the material designation for the polyfunctional FR4 be "L25",
>  even though the Tg is 140 C?

I have found, in general, that bare boards built from a higher Tg material
have a lower propensity towards absorption of HASL fluxes.  All other factors
being equal, it makes them a little cleaner, or easier to clean.

Doug Pauls
CSL

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