Patent ID: 6110337
Filing Date: 2000-08-29
Classification: C23C,H01J

Abstract:
Sputtering apparatus comprising:a vacuum chamber having an external port;a dual magnetron sputtering source assembly sealingly and removably mounted on said external port, said sputtering source assembly having a pair of targets in said vacuum chamber, said targets being surrounded by a ground plate with a central portion of said ground plate extending between said targets;a substrate support positioned opposite said sputtering source assembly in said vacuum chamber and having an aperture therein; andan optical passage extending through said sputtering source assembly and being bored through said central portion of said ground plate between said targets to permit the passage of a light beam projected onto a substrate on said substrate support at near normal angles of incidence;a light source for producing said light beam; anda detector for detecting said light beam after said light beam has passed through said substrate at a near normal angle of incidence.