Patent ID: 8535494
Filing Date: 2013-09-17
Classification: C23C,H01J

Abstract:
1. A rotary magnet sputtering apparatus comprising a substrate placing stage for placing thereon a substrate to be processed, a member on which a target is to be placed so as to face said substrate, and a magnet disposed on a side opposite to said substrate placing stage with respect to a portion where said target is disposed, and configured to confine plasma on a target surface by forming a magnetic field on the target surface using said magnet, wherein: said magnet comprises: a rotary magnet group having a plurality of plate-shaped magnets continuously arranged on a columnar rotary shaft and a fixed outer peripheral member which is formed by a fixed magnet or a ferromagnetic member and which is arranged in parallel to the target surface around said rotary magnet group; said fixed magnet of the fixed outer peripheral member being magnetized in a direction perpendicular to the target surface or said ferromagnetic member of the fixed outer peripheral member being not magnetized in advance; the magnet being structured so that a magnetic field pattern on the target surface moves with time by rotating said rotary magnet group along with said columnar rotary shaft, said rotary magnet sputtering apparatus further comprising: a shielding member disposed on an opposite side of said target with respect to said rotary magnet group so as to cover an end portion of said target and to be spaced apart from said target, said shielding member being provided with a slit which extends in the same direction as an axial direction of said columnar rotary shaft and opens said target to said substrate, wherein: plasma is excited on the target surface by applying, to said target, at least one of an RF power with a first frequency, and an RF power with a second frequency, and wherein: said substrate placing stage is provided with an RF application electrode so as to cause a self-bias voltage on said substrate placing stage during a sputtering process by applying a substrate RF power to said RF application electrode; wherein: an impedance between said shielding member and the ground is 1 kΩ or more at a frequency of said substrate RF power while an impedance between said target and the ground is 10Ω or less at the frequency of said substrate RF power, and an impedance between said shielding member and the ground is 10Ω or less at the frequency or frequencies of said one or two RF powers which is/are applied to said target.