Patent ID: 8625109
Filing Date: 2014-01-07
Classification: G01B,G03F

Abstract:
1. A method that uses a processor to develop an overlap distance for direct patterning using an optical lithography, the method comprising: detecting light amount distributions and positions of each light spot generated from an optical head to a substrate, the substrate comprising a first area and a second area; generating a compensation model of each of the light spots by applying a Gaussian distribution function to the respective positions and light amount distributions of the light spots; calculating, by the processor, using the compensation model, a first accumulated light amount of a first light spot corresponding to the first area of the substrate, the optical head being first scanned along a first direction of the substrate; calculating, by the processor, using the compensation model, a second accumulated light amount of a second light spot corresponding to the second area overlapped with the first area, a first overlapped area being occurred when the optical head is second scanned along the first direction after being moved in a second direction by a first distance; and determining an overlap distance according to a uniformity of summations of the first accumulated light amount and the second accumulated light amount.