Patent ID: 8568577

Claim:
A magnetron sputtering apparatus for processing a substrate, the apparatus comprising: a target holding member for holding a target that is arranged to face the substrate when processing the substrate; and a magnet installed at a side opposite to the substrate across the target, wherein the magnet comprises: a rotary magnet body installed around a column-shaped rotation shaft in a spiral shape; and a stationary outer peripheral body installed in a vicinity of the rotary magnet body in parallel to a surface of the target, wherein the rotary magnet body comprises a plurality of spiral bodies each formed from a plurality of plate magnets around and without penetrating the column-shaped rotation shaft along an entire length of the column-shaped rotation shaft, and forms a spiral-shaped magnet set in which adjacent spiral bodies in an axial direction of the column-shaped rotation shaft have opposite magnetic poles of an N pole and an S pole on a diametrical side of the column-shaped rotation shaft, the plurality of spiral bodies are parallel with and separated from each other, an entirety of each of the spiral bodies is either an N pole or an S pole along the entire length of the column-shaped rotation shaft, plasma is confined on the surface of the target by forming a magnetic field on the surface of the target by the magnet, and the rotary magnet body rotates with the column-shaped rotation shaft, so that a pattern of the magnetic field on the surface of the target moves as time passes.