Patent ID: 6861178
Filing Date: 2005-03-01
Classification: G03F

Abstract:
1. A phase shift mask comprising: a first phase shifter through which light passes by a first optical path length; a second phase shifter through which light passes by a second optical path length inverted in an optical phase from the first optical path length, the second phase shifter formed away from the first phase shifter by a predetermined distance; a light-blocking part formed around the first phase shifter and second phase shifter; and a correction pattern provided at a part of at least one of the first phase shifter and second phase shifter for correcting a distribution of light intensity between light passing through the first phase shifter and light passing through the second phase shifter, said correction pattern comprising oppositely facing jog parts positioned at opposite ends of said first and second phase shifters, wherein at least one phase shifter is elongated at both ends in the longitudinal direction relative to the gate width.