Patent ID: 7060398
Filing Date: 2006-06-13
Classification: G03F

Abstract:
1. A photomask in which, on a transparent substrate having light transmitting properties with respect to exposure light, a mask pattern having a semi-light shielding portion and a phase shifter, and a light-transmitting portion where the mask pattern is not located are provided, characterized in that the semi-light shielding portion has a transmittance which allows the exposure light to be partially transmitted, and transmits the exposure light in the same phase as that of the light-transmitting portion, the phase shifter transmits the exposure light in a phase opposite to that of the light-transmitting portion, the mask pattern is provided so as to surround the light-transmitting portion, the phase shifter is formed in a ring-shape around the light-transmitting portion, and the outline of the ring-shaped phase shifter is similar to the outline of the light-transmitting portion.