Sure there is a lot one can do with AZ photoresist........if the photo process was ok and you just need to postbake......then it should not be any problem.....with oven or without oven....i guess i know little about the process but most AZ resist are post baked at a temperature not more than 100°C for 1min on hotplate and abt 10 in oven....if u left it for two weeks that should not be a problem but u can check the structures under microscope if the photo process was ok before postbake...if the photo process is not good the postbake will not be good as well..... i hope this helps... Regards, --- On Tue, 8/11/09, Y.Tianwrote: From: Y.Tian Subject: [mems-talk] Post-bake of AZ photoresit To: "General MEMS discussion" Date: Tuesday, August 11, 2009, 2:29 PM Hi All, Would anybody comment the post-bake of developed AZ photoresist? I just found that the structure swells when I tried to post-bake the sample. Because I am worrying that the AZ will adsorb moisture from the air and the sample was prepared weeks ago, I just tried to dry it. Through the thickness direction, it looks the sidewall is curved when the heat travel through it, which was straight. Anybody has experience about this? Thanks a lot! Regards, Yingtao