Electrostatic attraction device and neutralization method

Abstract

There is provided an electrostatic attraction device having an electrostatic chuck in which an electrode and a heater are embedded in a dielectric. The device comprises: a DC power source unit having a DC power source configured to supply a DC power to the electrode; a first neutralizing circuit connected to a power supply path between the DC power source and the electrode; and a second neutralizing circuit connected to a power supply path between the first neutralizing circuit and the electrode. The first neutralizing circuit has a first ground relay that connects and disconnects the electrode and the ground via a voltage-drop resistance member, and the second neutralizing circuit has an isolation relay that connects and disconnects the first neutralizing circuit and the second neutralizing circuit, and a second ground relay that is connected to a power supply path between the isolation relay and the electrode and connects and disconnects the electrode and the ground side without going through a resistance member.

Dependencies are inferred from the claim text.