Invention Application
- Patent Title: ELECTROSTATIC CHUCK
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Application No.: US17009216Application Date: 2020-09-01
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Publication No.: US20210074525A1Publication Date: 2021-03-11
- Inventor: Yutaka MOMIYAMA , Minoru SUZUKI , Hitoshi SASAKI , Tsukasa SHIGEZUMI
- Applicant: TOTO LTD.
- Applicant Address: JP KITAKYUSHU-SHI
- Assignee: TOTO LTD.
- Current Assignee: TOTO LTD.
- Current Assignee Address: JP KITAKYUSHU-SHI
- Priority: JP2019-162313 20190905
- Main IPC: H01J37/32
- IPC: H01J37/32 ; H01L21/683

Abstract:
According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, a base plate, and first and second electrode layers. The ceramic dielectric substrate includes first and second major surfaces. The first and second electrode layers are provided inside the ceramic dielectric substrate. The second electrode layer is provided between the first electrode layer and the first major surface. The first electrode layer includes first and second portions. The first portion is positioned more centrally of the ceramic dielectric substrate than is the second portion. The first portion includes first and second surfaces. The second portion includes third and fourth surfaces. The third surface is positioned between the first surface and the second electrode layer. An electrical resistance of the first surface is greater than an average electrical resistance of the first portion.
Public/Granted literature
- US11557467B2 Electrostatic chuck Public/Granted day:2023-01-17
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