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 -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
