The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2024
Filed:
Mar. 13, 2020
Tokyo Electron Limited, Tokyo, JP;
Takahiro Kawawa, Yamanashi, JP;
Hideomi Hosaka, Yamanashi, JP;
Tokyo Electron Limited, Tokyo, JP;
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.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile