Patent ID: 6235170
Filing Date: 2001-05-22
Classification: C23C,H01J

Abstract:
A magnetron for sputtering a target material onto a substrate having a radius R to form a coating of the target material upon a surface of the substrate, comprising:a) a frusto-conical target off-spaced from said substrate and having an inner surface for being sputtered, said conical target being a conical frustum having an axis centrally disposed through first and second parallel planes truncating said conical target to define respectively larger and smaller openings in said target, said target having a frustum length determinable along said inner surface between said openings and having an included cone angle defined by the angle between the locus of opposite sides of said surface included in a plane inclusive of said axis;b) a cathode disposed adjacent said frusto-conical target opposite said inner surface;c) magnetic means cooperative with said frusto-conical target and said cathode for providing a magnetic field between said inner surface and said substrate surface, said magnetic field comprising flux lines extending over said inner surface, each of said flux lines being contained in a planes containing said axis, and the component of said magnetic field parallel to said inner surface being the same strength at all points on said inner surface; andd) an anode disposed adjacent said magnetic means for cooperating with said cathode and said magnetic means to provide an electric plasma over said inner surface.