Invention Grant
- Patent Title: Triboelectric charge controlled electrostatic clamp
- Patent Title (中): 摩擦电荷控制静电夹
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Application No.: US13021838Application Date: 2011-02-07
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Publication No.: US09082804B2Publication Date: 2015-07-14
- Inventor: Julian Blake , Dale K. Stone , Lyudmila Stone , David Suuronen , Shigeo Oshiro
- Applicant: Julian Blake , Dale K. Stone , Lyudmila Stone , David Suuronen , Shigeo Oshiro
- Applicant Address: US MA Gloucester
- Assignee: Varian Semiconductor Equipment Associates, Inc.
- Current Assignee: Varian Semiconductor Equipment Associates, Inc.
- Current Assignee Address: US MA Gloucester
- Main IPC: H01L21/683
- IPC: H01L21/683

Abstract:
An electrostatic clamp which more effectively removes built up charge from a substrate prior to removal is disclosed. Currently, the lift pins and the ground pins are the only mechanism used to remove charge from the substrate after implantation. The present discloses describes an electrostatic chuck in which the top dielectric surface has an embedded conductive region, such as a ring shaped conductive region in the sealing ring. Thus, regardless of the orientation of the substrate during release, at least a portion of the substrate will contain the conductive region on the dielectric layer of the workpiece support. This conductive region may be connected to ground through the use of conductive vias in the dielectric layer. In some embodiments, these conductive vias are the fluid conduits used to supply gas to the back side of the substrate.
Public/Granted literature
- US20120200980A1 TRIBOELECTRIC CHARGE CONTROLLED ELECTROSTATIC CLAMP Public/Granted day:2012-08-09
Information query
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