Patent ID: 8555211
Filing Date: 2013-10-08
Classification: G03F

Abstract:
1. A method of fabricating a mask, comprising: receiving an integrated circuit (IC) design layout data having a plurality of main features; performing an optical proximity correction (OPC) on the plurality of main features of the received IC design layout data to produce a first image; after performing the OPC on the plurality of main features, fracturing the first image to produce a fractured first image; inserting backbones in the plurality of main features of the received IC design layout data to produce a second image; performing, by using a computer, a comparison operation on the fractured first image and the second image to identify an error, wherein the error is identified by determining whether a difference between the fractured first image of the plurality of main features and the second image of the plurality of main features is greater than an predetermined dimensional value; and if no error is found, fabricating a mask based on the first image.