Are conformal coatings the right way to handle this? I understand there are kinds of FR4 and G10 that don't have hook. What does one do about hook - how are those substrates improved? How does hook manifest in circuits?
On Mon, 17 Apr 2017 03:48 David, <[email protected]> wrote: > FR4 has problems with consistency. Samples can have problems with > hook, dielectric absorption, leakage, and sensitivity to humidity. > > On Sun, 16 Apr 2017 12:08:07 +0100, you wrote: > > >Hi Chuck > > > >But the context is "PCBs with ceramic substrates". Are any of *those* > >tough? They may well be, perhaps you know of some? It does not help us > >with the subject much if there are ceramics with these amazing > >properties if they are not available as PCBs. > > > >There is also the question of exactly what properties of FR4 are > >limiting for "metrology" use. > > > >John > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
