Invention Grant
- Patent Title: Method and system for centering wafer on chuck
- Patent Title (中): 用于将晶片定位在卡盘上的方法和系统
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Application No.: US12334275Application Date: 2008-12-12
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Publication No.: US08060330B2Publication Date: 2011-11-15
- Inventor: Robert Griffith O'Neill , Jorge Luque , Shang-I Chou , Harmeet Singh
- Applicant: Robert Griffith O'Neill , Jorge Luque , Shang-I Chou , Harmeet Singh
- Applicant Address: US CA Fremont
- Assignee: Lam Research Corporation
- Current Assignee: Lam Research Corporation
- Current Assignee Address: US CA Fremont
- Agency: Martine Penilla Group, LLP
- Main IPC: G06F19/00
- IPC: G06F19/00 ; G06F17/40

Abstract:
A wafer handling mechanism is operated to place a wafer on a chuck. A chucking force is then applied to the wafer, whereby wafer support features of the chuck transfer a defect pattern onto a surface of the wafer. The surface of the wafer is analyzed by a defect metrology tool to obtain a mapping of the defect pattern transferred onto the surface of the wafer. A center coordinate of the chuck within a coordinate system of the wafer is determined by analyzing the defect pattern as transferred to the surface of the wafer. A spatial offset between the center coordinate of the chuck and the center of the wafer is determined. The spatial offset is used to adjust the wafer handling mechanism so as to enable alignment of the center of the wafer to the center coordinate of the chuck.
Public/Granted literature
- US20100150695A1 Method and System for Centering Wafer on Chuck Public/Granted day:2010-06-17
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