Patent ID: 9158209
Filing Date: 2015-10-13
Classification: G03F

Abstract:
1. A method of forming a resist pattern, the method comprising: receiving a substrate having a material feature disposed on the substrate, wherein receiving the substrate includes receiving a first leveling data associated with a first photoresist film and a first overlay data associated with patterning the first photoresist film, and wherein the patterned first photoresist film is used to form the material feature; deposing a second photoresist film on the substrate; obtaining second leveling data associated with the second photoresist film; and exposing the second photoresist film using a predicted overlay correction data to form a resist pattern overlying the material feature on the substrate, wherein the predicted overlay correction data is determined based on the first leveling data, the first overlay data, and the second leveling data, and wherein the predicted overlay correction data accounts for an effect of a leveling difference between the first leveling data and the second leveling data.