Hello, I tried diamond drill bits on Pyrex and glass slides. It worked well. Just drill it slowly without too much pressure. Put a drop of water on the drilling site will greatly smooth the wall of the hole. Zhao Quoting Moshe: > Hello > > I am looking for a way to make holes 1 mm diameter in glass. > I did gold mask on the glass and tried polysilicon as a mask too but the HF > stripped the masks. > > Do you have a solution for the mask ? > > Thank you Zhao Lu École Polytechnique de Montréal Lassonde Building room M-4505 Campus of University of Montreal Montréal, Qc, Canada H3T 1J4 Tel 514-340-4711 ext 5029