Suprem. Suprem will not give you DRIE per say but etching in general. I dont know if there is a specific simulation tool to deal with DRIE exclusive to etching in general. My experience is that SUPREM works just fine for simulating etching mems materials. regards, Nimo --- On Mon, 6/7/10, yasser sabrywrote: From: yasser sabry Subject: [mems-talk] DRIE Simulator To: "General MEMS discussion" Date: Monday, June 7, 2010, 10:50 AM Dear All, I'm looking for a good DRIE simulator. I'll be grateful if you give me your experience with different simulators.. Thanks in advance, Yasser Sabry