-------- In message <[email protected]>, Attila Kinali w rites:
>I recently wondered, why people around voltage metrology hardly >talk about ceramic substrates (Al2O3, AlN, ...) for PCBs. >They have surface resistivity that is as high as PTFE, have >higher thermal conductivity, lower thermal expansion (AlN is >even pretty close to Si). So, why then does it hardly ever get >mentioned? Is it the cost of those? Or is there something I am >missing? I would worry about piezoelectricity ? Also, most ceramics have hideous thermal expansions... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.
