Invention Grant
- Patent Title: System and method for measuring misregistration of semiconductor device wafers utilizing induced topography
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Application No.: US16647102Application Date: 2020-02-14
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Publication No.: US11573497B2Publication Date: 2023-02-07
- Inventor: Daria Negri , Amnon Manassen , Gilad Laredo
- Applicant: KLA CORPORATION
- Applicant Address: US CA Milpitas
- Assignee: KLA CORPORATION
- Current Assignee: KLA CORPORATION
- Current Assignee Address: US CA Milpitas
- Agency: Hodgson Russ LLP
- International Application: PCT/US2020/018202 WO 20200214
- International Announcement: WO2020/168142 WO 20200820
- Main IPC: G03F7/20
- IPC: G03F7/20 ; G06T7/00

Abstract:
A system and method of measuring misregistration in the manufacture of semiconductor device wafers is disclosed. A first layer and the second layer are imaged in a first orientation with a misregistration metrology tool employing light having at least one first wavelength that causes images of both the first periodic structure and the second periodic structure to appear in at least two planes that are mutually separated by a perpendicular distance greater than 0.2 μm. The first layer and the second layer are imaged in a second orientation with the misregistration metrology tool employing light having the at least one first wavelength that causes images of both the first periodic structure and the second periodic structure to appear in the at least two planes. At least one parameter of the misregistration metrology tool is adjusted based on the resulting analysis.
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