发明授权
- 专利标题: Triboelectric charge controlled electrostatic clamp
- 专利标题(中): 摩擦电荷控制静电夹
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申请号: US13021838申请日: 2011-02-07
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公开(公告)号: US09082804B2公开(公告)日: 2015-07-14
- 发明人: Julian Blake , Dale K. Stone , Lyudmila Stone , David Suuronen , Shigeo Oshiro
- 申请人: Julian Blake , Dale K. Stone , Lyudmila Stone , David Suuronen , Shigeo Oshiro
- 申请人地址: US MA Gloucester
- 专利权人: Varian Semiconductor Equipment Associates, Inc.
- 当前专利权人: Varian Semiconductor Equipment Associates, Inc.
- 当前专利权人地址: US MA Gloucester
- 主分类号: H01L21/683
- IPC分类号: H01L21/683
摘要:
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.
公开/授权文献
- US20120200980A1 TRIBOELECTRIC CHARGE CONTROLLED ELECTROSTATIC CLAMP 公开/授权日:2012-08-09
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