PVD or CVD are similar. even CVD is better because of the low stress he is after. --- On Tue, 8/18/09, walterwrote: From: walter Subject: Re: [mems-talk] Source for Low Stress Silicon Nitride To: rshile@NANOINK.net, "General MEMS discussion" Date: Tuesday, August 18, 2009, 7:44 AM Hi I don't know whether LPCVD will do the trick,also depending how thick a film. You may want to consider PVD sputtering. It worked well for us. walter@elume.com