Invention Grant
- Patent Title: Scanning differential interference contrast in an imaging system design
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Application No.: US16584370Application Date: 2019-09-26
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Publication No.: US10705026B2Publication Date: 2020-07-07
- Inventor: Andrew Zeng , Xuan Wang , Steve Xu
- 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
- Main IPC: G01N21/88
- IPC: G01N21/88 ; G01N21/95 ; G02B27/14 ; G02B27/30

Abstract:
The inspection system includes an illumination source, a TDI-CCD sensor, and a dark field/bright field sensor. A polarizer receives the light from the light source. The light from the polarizer is directed at a Wollaston prism, such as through a half wave plate. Use of the TDI-CCD sensor and the dark field/bright field sensor provide high spatial resolution, high defect detection sensitivity and signal-to-noise ratio, and fast inspection speed.
Public/Granted literature
- US20200132608A1 SCANNING DIFFERENTIAL INTERFERENCE CONTRAST IN AN IMAGING SYSTEM DESIGN Public/Granted day:2020-04-30
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