Invention Grant
- Patent Title: Wafer holder with tapered region
- Patent Title (中): 晶圆座具有锥形区域
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Application No.: US13426334Application Date: 2012-03-21
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Publication No.: US09099514B2Publication Date: 2015-08-04
- Inventor: Yi-Hung Lin , Li-Ting Wang , Tze-Liang Lee
- Applicant: Yi-Hung Lin , Li-Ting Wang , Tze-Liang Lee
- Applicant Address: TW Hsin-Chu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Current Assignee Address: TW Hsin-Chu
- Agency: Haynes and Boone, LLP
- Main IPC: A47G19/08
- IPC: A47G19/08 ; H01L21/687 ; H01L21/683 ; H01L21/477 ; H01L21/306 ; H01L21/673

Abstract:
An apparatus, a system and a method are disclosed. An exemplary apparatus includes a wafer holder including a first portion and a second portion. The first and second portions are formed of the same continuous material. The first portion includes a first upper surface and a first lower surface, and the second portion including a second upper surface and a second lower surface. The apparatus further includes an interface between the first and second portions. The interface provides for a transition such that the first upper surface of the first portion tends toward the second upper surface of the second portion. The apparatus further includes a tapered region formed in the first portion. The tapered region starts at a radial distance from a center line of the wafer holder and terminates at the interface. The tapered region has an initial thickness that gradually decreases to a final thickness.
Public/Granted literature
- US20130252424A1 WAFER HOLDER WITH TAPERED REGION Public/Granted day:2013-09-26
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