Invention Grant
- Patent Title: Wafer alignment markers, systems, and related methods
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Application No.: US16122062Application Date: 2018-09-05
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Publication No.: US11009798B2Publication Date: 2021-05-18
- Inventor: Nikolay A. Mirin , Robert Dembi , Richard T. Housley , Xiaosong Zhang , Jonathan D. Harms , Stephen J. Kramer
- Applicant: Micron Technology, Inc.
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Agency: TraskBritt
- Main IPC: G03F7/20
- IPC: G03F7/20 ; H01L21/68 ; G01R33/07 ; H01L23/544

Abstract:
A method of aligning a wafer for semiconductor fabrication processes may include applying a magnetic field to a wafer, detecting one or more residual magnetic fields from one or more alignment markers within the wafer, responsive to the detected one or more residual magnetic fields, determining locations of the one or more alignment markers. The marker locations may be determined relative to an ideal grid, followed by determining a geometrical transformation model for aligning the wafer, and aligning the wafer responsive to the geometrical transformation model. Related methods and systems are also disclosed.
Public/Granted literature
- US20200073257A1 WAFER ALIGNMENT MARKERS, SYSTEMS, AND RELATED METHODS Public/Granted day:2020-03-05
Information query
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