Invention Grant
- Patent Title: Secure semiconductor wafer inspection utilizing film thickness
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Application No.: US16683655Application Date: 2019-11-14
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Publication No.: US11313810B2Publication Date: 2022-04-26
- Inventor: Effendi Leobandung
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Fleit Intellectual Property Law
- Agent Thomas S. Grzesik
- Main IPC: G01N21/95
- IPC: G01N21/95 ; H01L21/66 ; H01L21/67 ; G01B11/06 ; G01N21/956 ; G06T7/00

Abstract:
A method for verifying semiconductor wafers includes receiving a semiconductor wafer including a plurality of layers. A first set of measurement data is obtained for at least one layer of the plurality of layers, where the first set of measurement data includes at least one previously recorded thickness measurement for one or more portions of the at least one layer. The first set of measurement data is compared to a second set of measurement data for the at least one layer. The second set of measurement data includes at least one new thickness measurement for the one or more portions of the at least one layer. The semiconductor wafer is determined to be an authentic wafer based on the second set of measurement data corresponding to the first set of measurement data, otherwise the semiconductor is determined to not be an authentic wafer.
Public/Granted literature
- US20210148834A1 SECURE SEMICONDUCTOR WAFER INSPECTION UTILIZING FILM THICKNESS Public/Granted day:2021-05-20
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