Invention Grant
- Patent Title: Method for polishing a semiconductor wafer
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Application No.: US13038455Application Date: 2011-03-02
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Publication No.: US10707069B2Publication Date: 2020-07-07
- Inventor: Juergen Schwandner , Michael Kerstan
- Applicant: Juergen Schwandner , Michael Kerstan
- Applicant Address: DE Munich
- Assignee: SILTRONIC AG
- Current Assignee: SILTRONIC AG
- Current Assignee Address: DE Munich
- Agency: Leydig, Voit & Mayer Ltd.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@64d7185a
- Main IPC: B24B7/22
- IPC: B24B7/22 ; H01L21/02

Abstract:
A method of polishing a semiconductor wafer includes polishing a surface of the semiconductor wafer using a polishing pad while supplying a polishing agent slurry containing abrasives during a first step. The polishing pad is free of abrasives and includes a first surface that contacts the semiconductor wafer, the first surface having a surface structure including elevations. Supply of polishing agent slurry is subsequently ended and, in a second step, the surface of the semiconductor wafer is polished using the polishing pad while supplying a polishing agent solution having a pH value of at least 12 that is free of solids.
Public/Granted literature
- US20110223841A1 METHOD FOR POLISHING A SEMICONDUCTOR WAFER Public/Granted day:2011-09-15
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