Invention Grant
- Patent Title: Apparatus and methods for inspecting reticles
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Application No.: US15803628Application Date: 2017-11-03
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Publication No.: US10395361B2Publication Date: 2019-08-27
- Inventor: Abdurrahman Sezginer , Mohammad Mehdi Daneshpanah
- Applicant: KLA-Tencor Corporation
- Applicant Address: US CA Milpitas
- Assignee: KLA-Tencor Corporation
- Current Assignee: KLA-Tencor Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Kwan & Olynick LLP
- Main IPC: G06T7/00
- IPC: G06T7/00 ; G01N21/956 ; G03F1/84 ; G03F7/20

Abstract:
Disclosed are methods and apparatus for qualifying a photolithographic reticle. A reticle inspection tool is used to acquire a plurality of images at different imaging configurations from each of a plurality of pattern areas of a test reticle. A reticle near field is recovered for each of the pattern areas of the test reticle based on the acquired images from each pattern area of the test reticle. The recovered reticle near field is then used to determine whether the test reticle or another reticle will likely result in unstable wafer pattern or a defective wafer.
Public/Granted literature
- US20180082415A1 APPARATUS AND METHODS FOR INSPECTING RETICLES Public/Granted day:2018-03-22
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