Hi, I suppose the LPCVD oxide (950C) film is conformal. But I just would like to know whether it is still the case for a thin (500A) film deposition. Especially, I want to know whether the vertical side wall and the top of a structure (rectangular cross-section) have the same thickness. Or is there a way that I can measure the thickness on the side wall? Thanks. Yuan __________________________________ Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com