Patent ID: 6521106
Filing Date: 2003-02-18
Classification: C23C,H01J

Abstract:
A magnetron sputtering apparatus for depositing a brittle film on a workpiece, comprising:a vacuum chamber, workpiece holding means situated within said vacuum chamber for holding a workpiece to be sputter coated, a sputtering source for emitting particles used to deposit a film of brittle material on said workpiece in said vacuum chamber, said sputtering source generally opposing said workpiece to be coated, and a collimator interposed between said workpiece and said sputtering source for limiting angles of the particles emitted from said sputtering source which pass through said collimator, said collimator comprising a plurality of individual collimator cells, said collimator cells being made of a material which has substantially the same thermal coefficient of expansion as said brittle material to be deposited on said workpiece.