Patent ID: 8327795

Claim:
A microwave plasma processing apparatus comprising: a processing container in which plasma processing is performed; a microwave source outputting microwaves; a rectangular waveguide transmitting the microwaves outputted from the microwave source; a coaxial converter converting a mode of the microwaves transmitted to the rectangular waveguide; a coaxial waveguide transmitting the microwaves of which the mode is converted by the coaxial converter; a taper-shaped connector attached to an inner conductor of the coaxial waveguide; a slot plate having a plurality of slots through which the microwaves are introduced into the processing container, the slot plate having an opening in the center of the slot plate; a support member passing through the opening of the slot plate and connected to an under surface of the taper-shaped connector, wherein the support member is conductive; and a conductive elastic body disposed between the slot plate and the support member, the conductive elastic body electrically connecting the slot plate with the taper-shaped connector and the slot plate through the support member.