Prolith was originally developed by Chris Mack while working for the NSA in the 1980's. It has gone through numerous revisions and ownership transfers. It is now marketed by KLA-Tencor Corp. Information is available in their Product Portfolio on their website listed under Computational Lithography. I don't know if it has any use for etch modeling but it certainly is useful for develop modeling. Mike Stan -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Shay Kaplan Sent: Thursday, October 23, 2008 2:10 AM To: 'General MEMS discussion' Subject: Re: [mems-talk] Is there any software for etching/developmentsimulation? Prolith is a commercial product. Don't remember who sells it though. Shay Kaplan