Invention Grant
- Patent Title: In-lens wafer pre-charging and inspection with multiple beams
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Application No.: US16729177Application Date: 2019-12-27
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Publication No.: US11152191B2Publication Date: 2021-10-19
- Inventor: Weihua Yin , Youfei Jiang
- Applicant: ASML Netherlands B.V.
- Applicant Address: NL Veldhoven
- Assignee: ASML Netherlands B.V.
- Current Assignee: ASML Netherlands B.V.
- Current Assignee Address: NL Veldhoven
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- Main IPC: H01J37/12
- IPC: H01J37/12 ; H01J37/26 ; H01J37/147

Abstract:
A charged particle system may include a first charged particle beam source provided on a first axis, and a second charged particle beam source provided on a second axis. There may also be provided a deflector arranged on the first axis. The deflector may be configured to deflect a beam generated from the second charged particle beam source toward a sample. A method of operating a charged particle beam system may include switching between a first state and a second state of operating a deflector. In the first state, a first charged particle beam generated from a first charged particle beam source may be blanked and a second charged particle beam generated from a second charged particle beam source may be directed toward a sample. In the second state, the second charged particle beam may be blanked and the first charged particle beam may be directed toward the sample.
Public/Granted literature
- US20200211818A1 IN-LENS WAFER PRE-CHARGING AND INSPECTION WITH MULTIPLE BEAMS Public/Granted day:2020-07-02
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