Invention Grant
- Patent Title: Real-time correction of template deformation in nanoimprint lithography
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Application No.: US15665027Application Date: 2017-07-31
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Publication No.: US10996560B2Publication Date: 2021-05-04
- Inventor: Anshuman Cherala , Mario Johannes Meissl , Byung-Jin Choi
- Applicant: Canon Kabushiki Kaisha
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Main IPC: G03F7/00
- IPC: G03F7/00 ; G03F9/00 ; G03F1/36 ; G03F1/60 ; G03F1/68

Abstract:
Reducing an alignment error of an imprint lithography template with respect to a substrate includes locating central alignment marks of the template with respect to corresponding central alignment marks of the substrate and locating peripheral alignment marks of the template with respect to corresponding peripheral alignment marks of the substrate. In-plane alignment error of the template is assessed based on relative positions of central alignment marks of the template and corresponding central alignment marks of the substrate. A combined alignment error of the template is assessed based on relative positions of peripheral alignment marks of the template and corresponding peripheral alignment marks of the substrate. Out-of-plane alignment error of the template is assessed based on a difference between the-combined and the in-plane alignment error of the template, and a relative position of the template and the substrate is adjusted to reduce the out-of-plane alignment error of the template.
Public/Granted literature
- US20190033708A1 REAL-TIME CORRECTION OF TEMPLATE DEFORMATION IN NANOIMPRINT LITHOGRAPHY Public/Granted day:2019-01-31
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