Patent ID: 6620290
Filing Date: 2003-09-16
Classification: C23C,H01J

Abstract:
A plasma process apparatus for processing a substrate using reaction gas excited to a plasma state by microwaves, comprising:a chamber having, with said substrate being held therein, a main wall opposite to a surface of said substrate and a sidewall surrounding a side of said substrate, for conducting the plasma process therein; a plurality of discrete microwave introduction windows separated from each other provided on said main wall to face an interior of said chamber, for introducing the microwave into said chamber; wherein, of said plurality of microwave introduction windows, at least two microwave introduction windows that are equivalent in distance with respect to said sidewall are for introducing microwaves of same power, and at least two microwave introduction windows that are of a different distance with respect to said sidewall are for introducing microwaves of different power; and a plurality of microwave waveguides for transmitting the microwave, wherein, for each of said microwave waveguides, one said microwave waveguide is branched and connected to respective ones of said at least two microwave introduction windows that are equivalent in distance relationship.