Patent ID: 7565879
Filing Date: 2009-07-28
Classification: H01J,H01L

Abstract:
1. A plasma processing apparatus for processing a specimen comprising: a process chamber capable of having an inside pressure thereof reduced, the process chamber including an outer cylinder having a metallic surface and having the capability of withstanding a reduced pressure, and an inner cylinder arranged inside the outer cylinder so as to delimit a gap between the outer cylinder and the inner cylinder, the inner cylinder being made of non-magnetic material and being detachably connected to the outer cylinder so as to be detachable from the outer cylinder; a process gas supply unit for supplying gas to the process chamber; a plasma generating unit for generating a plasma inside of the inner cylinder of the process chamber; a heat transfer gas supply system for supplying heat transfer gas into the gap; a pressure controller for controlling pressure in the gap so as to control a temperature difference between the outer cylinder and the inner cylinder; a specimen table disposed inside of the inner cylinder for holding a specimen; a vacuum pumping unit for evacuating the process chamber; a temperature monitoring unit for monitoring a temperature of the inner cylinder; and a temperature controller configured to control a temperature of the outer cylinder using a heater mounted on the outer cylinder, the temperature controller enabling comparison of a predetermined inner cylinder temperature which is given in advance in response to a processing condition of the specimens with the monitored temperature of the inner cylinder and for controlling the temperature of the outer cylinder in response to a result of the comparison so as to control the inner cylinder temperature to the predetermined inner cylinder temperature.