Patent ID: 7550383

Claim:
A method of performing a photolithography process for forming asymmetric semiconductor patterns comprising: A) forming a photoresist layer on a semiconductor substrate; B) transferring a first photolithography mask to the photoresist layer, the first photolithography mask comprising elements that form a first semiconductor pattern, wherein said pattern is disposed at cross points of horizontal lines and vertical lines on said photolithography mask; and C) transferring a second photolithography mask to the photoresist layer, the second photolithography mask comprising elements that form a second semiconductor pattern, which is disposed on every other horizontal line of the first photolithography mask, wherein individual elements that form the second semiconductor pattern are disposed for every two elements of the first semiconductor pattern in every other horizontal line on the first photolithography mask and disposed between adjacent elements of the first semiconductor patterns, wherein the first photolithography mask and the second photolithography mask transfer a composite aerial image of the first semiconductor pattern and the second semiconductor pattern that define the asymmetric semiconductor pattern to the photoresist layer in two dimensions during performing the photolithography process.