Patent ID: 8281740

Claim:
A substrate processing apparatus capable of applying an ion beam to a substrate including an opening to perform predetermined processing, the apparatus comprising: a first ion beam generator including a first ion extraction mechanism for extracting ions in a plasma; and a second ion beam generator including a second ion extraction mechanism for extracting ions in a plasma, the second ion beam generator being arranged opposite the first ion beam generator, wherein each of the first ion beam generator and the second ion beam generator is arranged so as to apply an ion beam to a region between the first ion beam generator and the second ion beam generator; the first extraction mechanism includes a first grid, and the second extraction mechanism includes a second grid; and when a substrate carrier that holds the substrate is arranged in the region, at least a part of an area of each of the first grid and the second grid, the area corresponding to the opening of the substrate, is occluded so as to prevent an ion beam from passing through the at least a part of the area.