Patent ID: 8809727

Claim:
A heat treatment apparatus, comprising: a heat treatment chamber for performing a heat treatment of a sample to be heated; a first plate-shaped electrode disposed in the heat treatment chamber; a second late-shaped electrode facing to the first electrode, disposed in the heat treatment chamber and on which the sample to be heated is placed; a high-frequency power supply for feeding a high-frequency power to the first electrode through a first power feed line to generate plasma between the first electrode and the second electrode; an adiabatic member for enclosing the first electrode and the second electrode to suppress radiation heat radiated from the first electrode and the second electrode; wherein the second electrode is grounded through a second power feed line, a substrate of the first electrode and a substrate of the second electrode are made of graphite each, the first power feed line and the second power feed line are made of graphite each, a distance from the first electrode to the adiabatic member is longer than a distance between the first electrode and the second electrode, and a distance from the second electrode to the adiabatic member is longer than the distance between the first electrode and the second electrode.