Invention Grant
- Patent Title: Method for cleaning semiconductor wafer
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Application No.: US17916939Application Date: 2021-02-18
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Publication No.: US11862456B2Publication Date: 2024-01-02
- Inventor: Kensaku Igarashi
- Applicant: SHIN-ETSU HANDOTAI CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: SHIN-ETSU HANDOTAI CO., LTD.
- Current Assignee: SHIN-ETSU HANDOTAI CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP 20078793 2020.04.28
- International Application: PCT/JP2021/006204 2021.02.18
- International Announcement: WO2021/220590A 2021.11.04
- Date entered country: 2022-10-04
- Main IPC: H01L21/02
- IPC: H01L21/02

Abstract:
A method for cleaning a semiconductor wafer to clean a semiconductor wafer after polishing, including: performing a first ozone-water treatment step of cleaning the polished semiconductor wafer with ozone water to form an oxide film; performing a brush cleaning step of brush-cleaning the semiconductor wafer with carbonated water after the first ozone-water treatment step; and then performing a second ozone-water treatment step including cleaning the semiconductor wafer with hydrofluoric acid to remove the oxide film, followed by cleaning with ozone water to form an oxide film again. This second ozone-water treatment step is performed one or more times.
Public/Granted literature
- US20230154742A1 METHOD FOR CLEANING SEMICONDUCTOR WAFER Public/Granted day:2023-05-18
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