Invention Grant
- Patent Title: De-clamping wafers from an electrostatic chuck
- Patent Title (中): 从静电卡盘中取出晶片
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Application No.: US12331619Application Date: 2008-12-10
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Publication No.: US08270142B2Publication Date: 2012-09-18
- Inventor: William D. Lee , Ashwin M. Purohit , Marvin R. LaFontaine , Richard J. Rzeszut
- Applicant: William D. Lee , Ashwin M. Purohit , Marvin R. LaFontaine , Richard J. Rzeszut
- 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:
One embodiment of the present invention relates to a method for declamping a semiconductor wafer that is electrically adhered to a surface of an electrostatic chuck by a clamping voltage. In this method, the clamping voltage is deactivated. For a time following the deactivation, a first region of the wafer is lifted an first distance from the surface of the electrostatic chuck while a second region of the wafer remains adhered to the surface of the electrostatic chuck. A predetermined condition is monitored during the time. The second region is lifted from the surface of the electrostatic chuck when the predetermined condition is met.
Public/Granted literature
- US20100142113A1 DE-CLAMPING WAFERS FROM AN ELECTROSTATIC CHUCK Public/Granted day:2010-06-10
Information query
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