It does not but the reaction is exothermic - if you etch a lot of silicon fast the heat might distort the plastic Shay -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Jiho Song Sent: Tuesday, January 26, 2010 2:54 AM To: General MEMS discussion Subject: [mems-talk] XeF2 gas etch plexiglass? Hello all, Do you guys know Xenon Difluoride etches the plexiglass? I am planning to bond the molded Si chip with polymer onto the plexiglass and put it into the chamber. Please let me know if you any ideas. Thank you.