Patent ID: 6579424
Filing Date: 2003-06-17
Classification: C23C,H01J

Abstract:
A method for manufacturing an annular or circular planar substrate with an outer radius and coated with a layer of a material which comprises at least two elements of different weight and having a substantially constant thickness and a substantially constant distribution of a ratio of an amount of heavier weight element to an amount of lighter weight element in said material along a surface of said substrate, the method comprising the steps of:magnetron sputtering a material with said at least two elements from a target surface thereby generating in said target surface at least one erosion excavation with a maximum depth along a substantially circular locus about a center of said target surface and having an excavation radius and further generating a second erosion excavation in said center; placing said substrate with a surface to be coated at a distance from, opposite to and substantially parallel to said target surface and centered about said center; selecting said excavation radius of said at least one erosion excavation to be larger than said outer radius of said substrate; and coating said surface of said substrate with said layer comprising said material.