Hi Yingtao, If you will normally do the post exposure bake you can do it before you will develop the samples. Otherwise you do not have to bake them. Regards, Bernd -----Ursprüngliche Nachricht----- Von: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] Im Auftrag von Y.Tian Gesendet: Montag, 13. Juli 2009 21:58 An: General MEMS discussion Betreff: Re: [mems-talk] Storage of developed AZ photoresist Hi Bernd, That's a good point. I will try to find a proper exsiccator for them. Also, do you have any idea about re-bake the AZ before using them, if the sample has been left for weeks? Regards, Yingtao