Patent ID: 7478609
Filing Date: 2009-01-20
Classification: H01J

Abstract:
1. A plasma processing apparatus having a processing chamber for performing processing using plasma therein and microwave introduction means for introducing microwaves into said processing chamber to cause a reactant gas supplied in said processing chamber to attain a plasma state, wherein said microwave introduction means includes a dielectric member transmitting said microwaves, each said dielectric member having a shape in cross section in a direction approximately perpendicular to a transmitting direction of said microwaves through said dielectric member that allows transmission of said microwaves of substantially a single mode, and each said dielectric member having a thickness T in said transmitting direction that satisfies a condition of (λ×(2 m+0.7)/4)≦T≦(λ×(2 m+1.3)/4), where λ is a wavelength of said microwaves of the single mode transmitted through said dielectric member and m is an arbitrary integer, wherein the wavelength of the microwaves of the single mode is, where λ ∈ L L wherein said microwave introduction means also includes slot antenna plates attached on a side of each said dielectric member that is opposite from the processing chamber, wherein a side of each said dielectric that faces the processing chamber is arranged to face a substrate located in the processing chamber such that at least one slot of the respective slot antenna plate is in a direct path of microwaves transmitted to said substrate, said substrate thereby being the subject of said processing.