HI Dave Do you have an issue with Ni contaminating the DRIE chamber? I've worked in several university fabs and none of the staff members would allow metal in the chamber. Best Leo On Thu, Apr 2, 2009 at 12:00 PM, David Robertswrote: > Hi Thomas, > > Plated nickel is used as a DRIE etchmask. 1.)Photolith 2.) Ni plate 10-20um > thick 3.) Strip resist 4.) Strip seed 5.) DRIE > > Regards, > Dave -- Xiaoguang "Leo" Liu Birck Nanotechnology Center, Purdue University, 1205 W.State Street, West Lafayette, IN, 47906 USA liu79@purdue.edu