In message <480971424.644410.1517715556...@webmail.xtra.co.nz>, Bruce Griffiths

>It has been used to machine/polish crystal quartz waveplates and
>to machine/polish the surface of silicon wafers before uses for
>MEMS fabrication. Its even been used to carve channels in silicon
>wafers in such applications.

The images on this page gives a good impression about the current
skill-level in that area:


I'm pretty sure that it is not the machine control but rather the
metrology that would be the challenge.

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