Patent ID: 9196461
Filing Date: 2015-11-24
Classification: H01J

Abstract:
1. A plasma processing apparatus comprising: a process chamber in which a substrate is received and plasma processing is performed; a lower electrode which is provided in the process chamber and functions as a holding stage on which the substrate is placed; an upper electrode which is provided in the process chamber to face the lower electrode, provides a process space between the upper electrode and the lower electrode, functions as a shower head for introducing a process gas to the substrate through a plurality of gas ejecting holes provided in a surface of the upper electrode facing the lower electrode, and is vertically movable to change an interval between the upper electrode and the lower electrode; a cover body which is provided over the upper electrode and hermetically closes an upper opening of the process chamber; a bellows which is adapted to be stretchable and retractable and is provided between the cover body and a top surface of the upper electrode; an isolated space providing member which is disposed in an annular space surrounded by the upper electrode, the cover body, a side wall of the process chamber, and the bellows, has an isolated space therein and a folded portion, the isolated space being separated from the process chamber, and includes an inlet/outlet through which a gas is introduced into or exhausted from the isolated space so as to vary a volume of the isolated space, wherein the isolated space of the isolated space providing member substantially fills the annular space when a size of the annular space varies as the upper electrode is vertically moved; a gas introducing and exhausting mechanism which introduces/exhausts the gas through the inlet/outlet into/from the isolated space of the isolated space providing member; and a high frequency power supply which generates plasma from the process gas by supplying high frequency power between the upper electrode and the lower electrode.