[volt-nuts] PCBs with ceramic substrates

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Apr 16 07:17:31 EDT 2017

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:


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?

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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