Dear friends, I am trying to figure out the 3- dimensional photogenerated carrier diffusion in silicon and depletion layer. I coulden't find a 3-dimensional model. I tried to solve a diffusion quation, which is a partial differential equation. I spent one week on it, I still can not solve it. Some tools software, such as Matlab and MathCAD can only solve two-dimensional problem. So I need your help. I appreciate any information from you. Thanks a lot Qintao __________________________________________________ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.com/