Invention Grant
US09535244B2 Emulation of reproduction of masks corrected by local density variations
有权
通过局部密度变化校正的掩模的再现仿真
- Patent Title: Emulation of reproduction of masks corrected by local density variations
- Patent Title (中): 通过局部密度变化校正的掩模的再现仿真
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Application No.: US14594851Application Date: 2015-01-12
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Publication No.: US09535244B2Publication Date: 2017-01-03
- Inventor: Holger Seitz , Thomas Thaler , Ulrich Matejka , Thomas Rademacher
- Applicant: Carl Zeiss SMT GmbH
- Applicant Address: DE Oberkochen
- Assignee: Carl Zeiss SMT GmbH
- Current Assignee: Carl Zeiss SMT GmbH
- Current Assignee Address: DE Oberkochen
- Agency: Fish & Richardson P.C.
- Priority: DE102014000454 20140113
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G02B21/36 ; G03F1/84 ; G03F1/70

Abstract:
A method is provided for emulating the imaging of a scanner mask pattern to expose wafers via a mask inspection microscope, in which the mask was corrected by introducing scattering centers. The method includes determining a correlation between the first values of at least one characteristic of aerial images of the mask pattern as produced by a mask inspection microscope and the second values of the at least one characteristic of aerial images of the mask pattern as produced by a scanner, recording a first aerial image of the mask pattern with the mask inspection microscope, determining the first values of the at least one characteristic from the first aerial image, and determining the second values of the at least one characteristic of the first aerial image, using the correlation. A mask inspection microscope is also provided for emulating the imaging of a mask pattern of a scanner to expose wafers, in which the mask was corrected by introducing scattering centers.
Public/Granted literature
- US20150198798A1 EMULATION OF REPRODUCTION OF MASKS CORRECTED BY LOCAL DENSITY VARIATIONS Public/Granted day:2015-07-16
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