Invention Grant
- Patent Title: Method and apparatus for compensating defects of a mask blank
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Application No.: US16747818Application Date: 2020-01-21
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Publication No.: US11385539B2Publication Date: 2022-07-12
- Inventor: Joachim Welte
- Applicant: Carl Zeiss SMS Ltd.
- Applicant Address: IL Misgav
- Assignee: Carl Zeiss SMS Ltd.
- Current Assignee: Carl Zeiss SMS Ltd.
- Current Assignee Address: IL Misgav
- Agency: Fish & Richardson P.C.
- Priority: DE102017212848.8 20170726
- Main IPC: G03F1/84
- IPC: G03F1/84 ; G01N21/88 ; G01N21/95 ; G03F7/20 ; G06T7/00

Abstract:
Method for compensating at least one defect of a mask blank, wherein the method includes the following steps: (a) obtaining data in respect of a position of the at least one defect of the mask blank; (b) obtaining design data for pattern elements which should be produced on the mask blank; (c) determining whether the at least one defect is arranged relative to a pattern element to be produced in such a way that it has substantially no effect when exposing a wafer using the mask blank that is provided with the pattern element to be produced; and (d) otherwise, displacing the at least one defect on the mask blank in such a way that it has substantially no effect when exposing the wafer using the mask blank that is provided with the pattern element to be produced.
Public/Granted literature
- US20200159111A1 METHOD AND APPARATUS FOR COMPENSATING DEFECTS OF A MASK BLANK Public/Granted day:2020-05-21
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