Patent ID: 8984452
Filing Date: 2015-03-17
Classification: G03F

Abstract:
1. A method for determining a lithographic exposure dosage, the method comprising: receiving a design database including a plurality of features, wherein the plurality of features are intended to be formed on a workpiece; defining a target region of the design database, wherein the target region includes a target feature; defining a region of the design database proximate to the target region; determining an exposed area within the region; determining a center of mass of the exposed area within the region; defining a shape located at the center of mass and having a measurement of exposed area corresponding to the exposed area within the region; determining a proximity effect of the region upon the target feature based on the defined shape, wherein the determining of the proximity effect is performed using a computer; and determining a total proximity effect for the target feature based on the determined proximity effect of the region upon the target feature.