Try a place in Chicago called FotoFab (www.fotofab.com). They can do wet chemical etching of photolithographically patterned stainless steel. I would try a stainless thickness of ~ 0.005" (125 um), which should be a good compromise between rigidity and machinability. Note that the minimum feature size is proportional to the thickness. ___________________________________________ Message: 8 Date: Wed, 6 Feb 2002 11:27:44 -0500 (EST) From: Nirmal GovindarajuTo: Subject: [mems-talk] Shadow Masks Reply-To: mems-talk@memsnet.org Hi, I'm a Graduate Student at North Carolina State University and I am looking for some information on people who produce shadow masks. Please note that I will be using the shadow masks to fabricate thin film resistors and thermocouples on a substrate using e-beam evaporation. Thank you. Sincerely, Nirmal Govindaraju