Patent ID: 7226524

Claim:
A plasma processing apparatus comprising: an evacuatable processing vessel; a workpiece mount base, installed in the processing vessel, for mounting thereon an object to be processed; a microwave transmitting plate provided in an opening of a ceiling of the processing vessel; a planar antenna member with a plurality of microwave radiation holes and disposed above the microwave transmitting plate, for supplying a microwave into the processing vessel via the microwave transmitting plate; a grounded shield lid portion provided directly above the planar antenna member to cover a top of the planar antenna member; a waveguide for guiding the microwave from a microwave generating source to the planar antenna member; a member elevating mechanism for relatively varying a vertical distance between the planar antenna member and the shield lid portion by moving the shield lid portion; a tuning rod insertable into the waveguide; a tuning rod driving mechanism for moving the tuning rod to adjust an insert amount thereof; and a matching control section for controlling an elevation amount of the shield lid portion and the insert amount of the tuning rod to obtain a matching adjustment.