-------- In message <ee82321b-3176-4d0d-b0bc-64625dce8...@n1k.org>, Bob kb8tq writes:
>If you try “normal” machining techniques on a resonator, you are very >likely to create micro cracks in the material. Those are *really* bad for >aging and a few other issues ….. So that brings me to another question: We use quartz crystals in very simple geometries, usually cylinder slabs, with very perfect surfaces - for all kinds of good and sane reasons. But mostly we use simple geometries because that is what we could make work, with the pretty crude production mechanisms in second world war. On the other side of the business we have SAW resonators which uses very complex conductor patterns on the surface to do their thing. If we can/could etch quartz in *precise* complex patterns at will, regardless of crystal orientation, sort of like the stuff we do in silicon wafers already: https://www.micralyne.com/fabrication-capabilities/etching/ Would that open up any interesting possibilities, or is the simple cylinder slab by definition the best ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@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. _______________________________________________ time-nuts mailing list -- firstname.lastname@example.org To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.