Patent ID: 8852389
Filing Date: 2014-10-07
Classification: H01J

Abstract:
1. A plasma processing apparatus comprising: a processing chamber having an opening at an upper portion thereof and configured to perform therein a process on a target object by plasma; a mounting table configured to mount the target object thereon within the processing chamber; a first electrode embedded in the mounting table and configured to apply a bias voltage to the target object; a dielectric plate configured to form a plasma generation space by closing the opening of the processing chamber and transmit a microwave so as to introduce the microwave into the processing chamber; a planar antenna having multiple slot holes provided above the dielectric plate and configured to introduce the microwave generated by a microwave generator into the processing chamber via the dielectric plate; an annular cover member provided on the processing chamber and including a contact support protruding toward the plasma generation space and configured to support an outer periphery of the dielectric plate on an upper surface of the contact support; an annular extended protrusion that is different from a gas inlet, protruding from the processing chamber or the contact support toward the plasma generation space within the processing chamber with a gap between the dielectric plate and the annular extended protrusion and serving as a part of a second electrode facing the first electrode via the plasma generation space therebetween; and a space formed between an upper surface of the extended protrusion and a lower surface of the dielectric plate; and a gas inlet configured to introduce a processing gas toward the space between the dielectric plate and the extended protrusion, wherein the gas inlet is formed in an inner peripheral surface of the contact support and disposed between the contact support and the extended protrusion.