Patent ID: 7430985

Claim:
A plasma processing equipment comprising: an evacuatable processing container; a loading table, installed in the processing container, for loading thereon an object to be processed; a microwave transmission plate provided in an opening of a ceiling of the processing container; a flat antenna member for supplying microwaves into the processing container via the microwave transmission plate; a grounded shield cover body covering an upper side of the flat antenna member; and a waveguide for supplying the microwaves from a microwave generating source to the flat antenna member, wherein at least a part of the waveguide comprises a coaxial waveguide including a tube-shaped waveguide main body of an outer side and a guide axis that penetrates a central portion of the waveguide main body, and wherein at least one of the waveguide main body and the guide axis includes, along its longitudinal axis, a high dielectric portion formed of a high dielectric material and a conductor portion formed of a conductor material such that the conductor portion and the high dielectric portion have the same diameter, and the high dielectric material has a relative dielectric constant of 100 or greater.