Invention Grant
- Patent Title: Hybrid electrostatic chuck
- Patent Title (中): 混合式静电吸盘
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Application No.: US12652669Application Date: 2010-01-05
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Publication No.: US08593779B2Publication Date: 2013-11-26
- Inventor: Michael R. Sogard
- Applicant: Michael R. Sogard
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Agency: Roeder & Broder LLP
- Main IPC: H01L21/683
- IPC: H01L21/683

Abstract:
An electrostatic chuck (230) for holding a device (200) includes a chuck body (244), a Coulomb electrode assembly (246), a Johnsen-Rahbek (J-R) electrode assembly (248), and a control system (224). The chuck body (244) includes a chucking surface (250) that engages the device (200), and the chuck body (244) is made of a dielectric having a relatively high resistance. The J-R electrode assembly (248) is positioned spaced apart from the chucking surface (250). The Coulomb electrode assembly (246) is also positioned spaced apart from the chucking surface (250). The control system (224) selectively directs a first voltage to the J-R electrode assembly (248) to generate a J-R type force that attracts the device (200) towards the chucking surface (250), and selectively directs a second voltage to the Coulomb electrode assembly (246) to generate a Coulomb type force that also attracts the device (200) towards the chucking surface (250). With this design, both the J-R type force and the Coulomb type force are used to concurrently attract the device (200) against the chucking surface (2500. As a result thereof, the electrostatic chuck (230) is better able to reduce non-flatness of the device (200), and/or crush any particles positioned between the device (200) and the chucking surface (250).
Public/Granted literature
- US20110164343A1 HYBRID ELECTROSTATIC CHUCK Public/Granted day:2011-07-07
Information query
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