Invention Grant
- Patent Title: Field curvature correction for multi-beam inspection systems
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Application No.: US15173144Application Date: 2016-06-03
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Publication No.: US11302511B2Publication Date: 2022-04-12
- Inventor: Alan Brodie , Rainer Knippelmeyer , Christopher Sears , John Rouse , Grace Hsiu-Ling Chen
- 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: Suiter Swantz pc llo
- Main IPC: H01J37/12
- IPC: H01J37/12 ; H01J37/28 ; H01J37/21 ; H01J37/153

Abstract:
Multi-beam e-beam columns and inspection systems that use such multi-beam e-beam columns are disclosed. A multi-beam e-beam column configured in accordance with the present disclosure may include an electron source and a multi-lens array configured to produce a plurality of beamlets utilizing electrons provided by the electron source. The multi-lens array may be further configured to shift a focus of at least one particular beamlet of the plurality of beamlets such that the focus of the at least one particular beamlet is different from a focus of at least one other beamlet of the plurality of beamlets.
Public/Granted literature
- US20170229279A1 Field Curvature Correction for Multi-Beam Inspection Systems Public/Granted day:2017-08-10
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