Patent ID: 9343336
Filing Date: 2016-05-17
CPC Classification: H01J,H01L

Claim Text:
1. A plasma processing apparatus comprising: a processing chamber disposed in a vacuum vessel, the processing chamber being depressurized and plasma being generated therein; a sample stage located in a lower portion in the processing chamber, on a top surface of which a sample to be processed with the plasma is mounted; a dielectric film disposed on the top portion of the sample stage, the dielectric film constituting a sample mounting surface of the sample stage; a plurality of electrodes embedded inside of the dielectric film for chucking the sample to the upper surface of the dielectric film while electric power is supplied, the plurality of electrodes including at least one electrostatic chuck electrode which is disposed beneath an inner area of the sample mounting surface and another electrostatic chuck electrode which is disposed in an outer peripheral region of the at least one electrostatic chuck electrode beneath the inner area of the sample mounting surface; and a controller which is configured to control the supply of the electric power to the plurality of electrodes while the sample is mounted on the sample stage before the process of the sample is initiated, in a manner that a first part of the sample is chucked by supplying the electric power to the at least one electrostatic chuck electrode beneath the inner area of the sample mounting surface, and after the temperature of the sample is changed to a predetermined temperature, a larger part of the sample is chucked by supplying the electric power to the other of the electrodes including the another electrostatic chuck disposed in the outer peripheral region of the at least one electrostatic chuck electrode beneath the inner area of the sample mounting surface.