Patent ID: 6024843
Filing Date: 2000-02-15
Classification: C23C,H01J

Abstract:
A magnetron sputter apparatus comprising:a vacuum chamber;means for holding a target having a concave front surface in said vacuum chamber, said front surface being a surface of revolution; androtatable magnetic means defining a normalized centerline for generating a magnetic field over said front surface of said target,said magnetic means being configured so that at least a first portion of the normalized centerline of said magnetic means is describable by an equation of the form ##EQU41## where .xi.(r) is a preselected normalized erosion profile to be generated in said target during rotation of said magnetic means, z(r) defines said surface of revolution, C is a selected constant, and .theta. has a selected range between 0 and .pi., r is the distance from the axis of rotation divided by the width of the magnet array assembly times a constant.