Patent ID: 9280634
Filing Date: 2016-03-08
CPC Classification: G03F,G06F,G21K

Claim Text:
1. A method comprising: altering a first non-pixelated mask in a frequency domain to obtain a second mask, wherein the altering comprises determining a first cost functional, wherein the first cost functional comprises a first cost term and a second cost term, and wherein the first cost term is weighted in a first proportion relative to the second cost term; and altering the second mask to obtain a third mask, wherein the altering comprises determining a second cost functional, wherein the second cost functional comprises the first cost term and the second cost term, and wherein the first cost term is weighted in a second proportion relative to the second cost term, wherein the second proportion is different than the first proportion, wherein the altering the first non-pixelated mask and the altering the second mask are performed using an electronic processor.