Jan Kowal wrote:

> Does anyone know where I can get ultrasonic machining of glass and
> silicon done?

We use Bullen Ultrasonic in Ohio.  Also, see Sonic Mill in Albuquerque,
New Mexico.
--
Albert K. Henning, Ph.D.    415/617-0854 (Office)
Redwood Microsystems        415/326-9217 (FAX)
1020 Hamilton Avenue        [email protected]
Menlo Park, CA  94025       http://www.redwoodmicro.com