[volt-nuts] PCBs with ceramic substrates

[Poul-Henning Kamp]

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In message <87inm44nl4.fsf at devereux.me.uk>, John Devereux writes:

>There is also the question of exactly what properties of FR4 are
>limiting for "metrology" use.

FR4 are certainly not without its own problems, in particular
with respect to mechanical/electrical phenomena (bending, tempco etc.)

And saying "Ceramic" isn't really narrowing down what we mean
anyway, pretty much anything in the Rogers catalog is in game:

	https://www.rogerscorp.com/acs/products.aspx

I suspect only experiments would be able to tell which of many
possible desirable properties are most beneficial ?

The real question is if the mobile devices have brought the volume
up so that running small series for specialty use is affordable?

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