Invention Grant
- Patent Title: Annulus clamping and backside gas cooled electrostatic chuck
- Patent Title (中): 环形夹紧和背面气体冷却静电卡盘
-
Application No.: US11641334Application Date: 2006-12-19
-
Publication No.: US08422193B2Publication Date: 2013-04-16
- Inventor: Teng Chao D. Tao , William D. Lee , Marvin R. LaFontaine , Ashwin M. Purohit
- Applicant: Teng Chao D. Tao , William D. Lee , Marvin R. LaFontaine , Ashwin M. Purohit
- Applicant Address: US MA Beverly
- Assignee: Axcelis Technologies, Inc.
- Current Assignee: Axcelis Technologies, Inc.
- Current Assignee Address: US MA Beverly
- Agency: Eschweiler & Associates, LLC
- Main IPC: H01L21/683
- IPC: H01L21/683

Abstract:
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.
Public/Granted literature
- US20080144251A1 Annulus clamping and backside gas cooled electrostatic chuck Public/Granted day:2008-06-19
Information query
IPC分类: