Wed. 2/24/99 Hello, In regard to your question about etching microchannels on glass, there is an excellent article in the Journal of Biomedical Microdevices 1:1, 7-26, 1998 "Microfabrication Technology for the Production of Capillary Array Electrophoresis Chips" Peter C. Simpson, Adam T. Wooley, and Richard A. Mathies. This research group is at Berkeley, Dept of Chemistry, rich@zinc.cchem.berkeley.edu John West Microcosm Technologies CAD for Microfluidics www.memcad.com johnwest@memcad.com