Patent ID: 9384946
Filing Date: 2016-07-05
CPC Classification: H01J,H01L

Claim Text:
1. A plasma processing apparatus, comprising: a vacuum vessel; a processing chamber inside the vacuum vessel, wherein the processing chamber is configured to generate plasma therein, and wherein a space inside the processing chamber is configured to be decompressed; a sample stage disposed at a lower position within the processing chamber, the sample stage comprising an upper member having a cylindrical shape and a lower member which is coupled to the upper member therebeneath; an insulating film comprised of an insulating material which constitutes a sample-mounting surface on an upper surface of the upper member of the sample stage, the sample-mounting surface being configured to have a sample mounted thereon that is a target for processing with plasma; an electrode disposed inside the insulating film, power for electrostatically adhering the sample being supplied to the electrode; a through hole within the upper member and lower member of the sample stage and passing through at least the lower member, the through hole having an internal open space; an insulating sleeve which has a tubular shape and is disposed inside the open space of the through hole via a clearance space between an inner surface of the through hole, the insulating sleeve having an inner tube space, wherein the clearance space is in communication with the processing chamber via a gap between the upper member and the lower member of the sample stage; a socket unit disposed inside the inner tube space of the insulating sleeve via a distance therebetween, an upper end of the socket unit being connected to the electrode inside of the insulating film, wherein the insulating sleeve is detachably disposed from the socket unit in an upper portion of the insulating sleeve and a connecting portion of the socket unit to the electrode is disposed in the clearance space; a pin which is disposed inside the inner tube space of the insulating sleeve coming in from a lower side of the open space and is in contact with the socket unit by being inserted into an inside of the socket unit in the open space of the through hole; a first seal member which is attached onto an outside surface of the socket unit inside the inner tube space of the insulating sleeve and configured to hermetically partition the inner tube space between the clearance space and a hermetically partitioned space in which a contact portion where the inserted pin is in contact with the socket unit inside thereof is included and is at substantially atmospheric pressure, wherein at least one part of the inner tube space of the insulation sleeve is disposed inside the lower member of the sample stage; and a second seal member which is attached onto a surface of the lower member of the sample stage at an outside of the inner tube space of the insulating sleeve and configured to hermetically seal between the gap of the sample stage and the hermetically partitioned space.