As usual, the mems@isi.edu mailing list has come through. I would like to thank all the people who contacted me, there are too many to thank individually. I will post a summary of the e-mails and my research on the LPCVD/Furnaces needed for surface micromachining, when I have a chance to digest the information. (this could take a couple of months) Ken Westra Director, MicroFab University of Alberta