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:
Aug. 06, 2019
Filed:
Mar. 27, 2018
Toto Ltd., Kitakyushu-shi, Fukuoka, JP;
Jumpei Uefuji, Kitakyushu, JP;
Hitoshi Sasaki, Kitakyushu, JP;
Kosuke Yamaguchi, Kitakyushu, JP;
Kengo Maehata, Kitakyushu, JP;
Yuichi Yoshii, Kitakyushu, JP;
Tetsuro Itoyama, Kitakyushu, JP;
Toto Ltd., Fukuoka, JP;
Abstract
According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, an electrode layer, a base plate, and a heater plate. The ceramic dielectric substrate has a first major surface where a processing object is placed. The electrode layer is provided in the ceramic dielectric substrate. The base plate supports the ceramic dielectric substrate. The heater plate is provided between the base plate and the first major surface. The heater plate includes a first heater element and a second heater element. The first heater element emits heat due to a current flowing. The second heater element emits heat due to a current flowing. When viewed along a direction perpendicular to the first major surface, bends of the first heater element is more than bends of the second heater element, and the first heater element includes a portion positioned at a gap of the second heater element.