- Patent Title: Apparatus and methods for inspecting extreme ultra violet reticles
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Application No.: US14591181Application Date: 2015-01-07
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Publication No.: US09679372B2Publication Date: 2017-06-13
- Inventor: Mehran Nasser-Ghodsi , Stanley E. Stokowski , Mehdi Vaez-Iravani
- 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: G06K9/00
- IPC: G06K9/00 ; G06T7/00

Abstract:
Disclosed are methods and apparatus for inspecting an extreme ultraviolet (EUV) reticle is disclosed. An inspection tool for detecting electromagnetic waveforms is used to obtain a phase defect map for the EUV reticle before a pattern is formed on the EUV reticle, and the phase defect map identifies a position of each phase defect on the EUV reticle. After the pattern is formed on the EUV reticle, a charged particle tool is used to obtain an image of each reticle portion that is proximate to each position of each phase defect as identified in the phase defect map. The phase defect map and one or images of each reticle portion that is proximate to each position of each phase defect are displayed or stored so as to facilitate analysis of whether to repair or discard the EUV reticle.
Public/Granted literature
- US20150117754A1 APPARATUS AND METHODS FOR INSPECTING EXTREME ULTRA VIOLET RETICLES Public/Granted day:2015-04-30
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