Does anyone know where I can get ultrasonic machining of glass and silicon done? Typically, I need large numbers of holes in the sub-millimetre range drilled into 3" and 4" substrates, up to 1mm thick. -- Jan Kowal Applied Microengineering Ltd 68 Milton Park Abingdon, Oxfordshire, UK Tel: +44 (0)1235 833934 Fax: 833935 e-mail: kowal@aml2.win-uk.net