Patent ID: 7338576

Claim:
A plasma processing device comprising: a processing chamber accommodating therein a substrate to be processed; a plasma generating mechanism installed in the processing chamber for performing a plasma process on the substrate to be processed; and a magnetic field forming mechanism for forming a multi-pole magnetic field around a periphery of the substrate to be processed accommodated in the processing chamber, the magnetic field forming mechanism including a plurality of magnet segments made of permanent magnets and a magnet segment rotation unit, and being installed outside the processing chamber, wherein the magnet segment rotation unit rotates at least parts of the magnet segments about respective vertical axes of said at least part of the magnet segments to thereby change an angle between magnetic pole directions of every two neighboring magnet segments to adjust strength of the multi-pole magnetic field formed around the substrate to be processed in the processing chamber according to a type of a to-be-etched layer formed on a surface of the substrate to be processed, and the magnet segment rotation unit rotates said every two neighboring magnet segments in opposite directions.