发明申请
- 专利标题: Annulus clamping and backside gas cooled electrostatic chuck
- 专利标题(中): 环形夹紧和背面气体冷却静电卡盘
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申请号: US11641334申请日: 2006-12-19
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公开(公告)号: US20080144251A1公开(公告)日: 2008-06-19
- 发明人: Teng Chao D. Tao , William D. Lee , Marvin R. LaFontaine , Ashwin M. Purohit
- 申请人: Teng Chao D. Tao , William D. Lee , Marvin R. LaFontaine , Ashwin M. Purohit
- 专利权人: Axcelis Technologies, Inc.
- 当前专利权人: Axcelis Technologies, Inc.
- 主分类号: H01L21/687
- IPC分类号: H01L21/687 ; H01T23/00
摘要:
An electrostatic clamp (ESC), system, and method for clamping a workpiece is provided. A clamping plate of the ESC has central disk and an annulus encircling the central disk, wherein the central disk is recessed from the annulus by a gap distance, therein defining a volume. Backside gas delivery apertures are positioned proximate to an interface between the annulus and the central disk. A first voltage to a first electrode of the annulus clamps a peripheral region of the workpiece to a first layer. A second voltage to a second electrode of the central disk generally compensates for a pressure of a backside gas within the volume. The ESC can be formed of J-R- or Coulombic-type materials. A cooling plate associated with the clamping plate further provides cooling by one or more cooling channels configured to route a cooling fluid therethrough.
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