• Patent Title: ELECTROSTATIC CHUCK DEVICE AND SLEEVE FOR ELECTROSTATIC CHUCK DEVICE
  • Application No.: US17911440
    Application Date: 2021-03-05
  • Publication No.: US20230115256A1
    Publication Date: 2023-04-13
  • Inventor: Nobuyoshi YAMAZAKI
  • Applicant: Tomoegawa Co., Ltd.
  • Applicant Address: JP Chuo-ku, Tokyo
  • Assignee: Tomoegawa Co., Ltd.
  • Current Assignee: Tomoegawa Co., Ltd.
  • Current Assignee Address: JP Chuo-ku, Tokyo
  • Priority: JP2020-055844 20200326
  • International Application: PCT/JP2021/008815 WO 20210305
  • Main IPC: H01L21/683
  • IPC: H01L21/683
ELECTROSTATIC CHUCK DEVICE AND SLEEVE FOR ELECTROSTATIC CHUCK DEVICE
Abstract:
An electrostatic chuck device containing a substrate, a stack stacked on an upper surface of the substrate in the thickness direction, and a ceramic layer stacked on an upper surface of the stack in the thickness direction. A sleeve formed from an insulating material is inserted into a through-hole that penetrates through the substrate and the stack in the thickness direction. The upper surface of the sleeve in the thickness direction has a two-level structure including a first upper surface positioned on the same plane as an upper surface of the substrate in the thickness direction, and a second upper surface positioned above the first upper surface in the thickness direction of the sleeve and disposed proximate to the ceramic layer. In a plan view, an edge portion of the stack is disposed on top of the first upper surface.
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