Hello, I am familiar with Sigma Systems Corporation's C4 model - very good hot plate with digital control, but maybe expensive. You would need liquid nitrogen in order to control the cooling. There are different sizes of plates available from this company. www.sigmasystem.com Good luck! Sébastien Allard ------------------------------------------ R&D Process Engineer LxSix Photonics 520 McCaffrey Saint-Laurent, Québec, H4T 1N1 Phone : (514) 599-5714 ext. 267 Fax : (514) 599-5729 sallard@lxsix.com -----Original Message----- From: jgrogan@seas.upenn.edu Sent: 6 janvier 2006 17:37 To: General MEMS discussion Subject: [mems-talk] hot plate recommendation Hello all, I'm looking to purchase a programmable hot plate for our lab to do baking of photoresists for photolithography. I'm looking for one where I can control the ramp of heating and cooling (i.e. tell it to increase its temperature at 2 C/min then stay at some temp for a while and then cool at 1 C/min). If anyone could recommend a brand or model to me I would greatly appreciate it.