The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
Aug. 29, 2022
Synopsys, Inc., Mountain View, CA (US);
Peng Liu, Cupertino, CA (US);
Synopsys, Inc., Sunnyvale, CA (US);
Abstract
A layout geometry of a lithographic mask is received. The layout geometry includes at least one shape having one or more rounded corners. The layout geometry is partitioned into a plurality of feature images, for example as selected from a library. The feature images include at least one mask corner rounding (MCR)-corrected feature image that accounts for the rounded corners of the shape. The feature images have corresponding mask 3D (M3D) filters, which represent the electromagnetic scattering effect of that feature image for a given source illumination. The mask function contribution from each of the feature images is calculated by convolving the feature image with its corresponding M3D filter. The mask function contributions are combined to determine a mask function for the mask illuminated by the source illumination.