Patent ID: 9390943
Filing Date: 2016-07-12
CPC Classification: C23C,H01J,H01L

Claim Text:
1. A substrate processing apparatus configured to generate an electric field in a processing space between a lower electrode, to which a high frequency power is supplied, and an upper electrode facing the lower electrode and perform plasma processing on a substrate mounted on the lower electrode by using a plasma generated by the electric field, the apparatus comprising: a plurality of electromagnets disposed on a surface of the upper electrode, each of the electromagnets having a rod-shaped yoke comprising an iron core and a coil wound on a side surface of the yoke, and a controller configured to control a level and a direction of a current flowing through the coil of each of the electromagnets, wherein the electromagnets consist of: wherein the peripheral region group is disposed radially inside of an outer periphery of the substrate mounted on the lower electrode and the outer side group is disposed radially outside of the outer periphery of the substrate mounted on the lower electrode, wherein the yokes of the plurality of electromagnets have a same length and a same permeability, wherein each yoke of the electromagnets of the outer side group has a lager winding number and a larger diameter than each yoke of said at least one electromagnet of the central portion group and the electromagnets of the peripheral region group, and wherein a polarity of the processing side space magnetic pole of the central portion group is the same as a polarity of the processing space side magnetic poles of the peripheral region group, and the polarity of the processing space side magnetic poles of the peripheral region group is different from a polarity of the processing space side magnetic poles of the outer side group.