Also, what are the design schematics for an effusion cell?
Answer Since the process is usually thermal evaporation, the physical arrangement is vertical with the substrate at the top. The source to substrate distance varies depending: a. on film uniformity required b. deposition rate required c. chamber dimensions d. substrate dimensions We have used separation distances greater than three feet on occasion. Achieving adequate thermal control to evaporate materials in the 100 to 300 degree C range is far from trivial and is the subject of many patents. The design schematics of our effusion cells are not something we give away.
