Patent ID: 7759021

Claim:
A multi-transmission phase mask used for an exposure apparatus, comprising: a transparent substrate; a light shielding film formed on the transparent substrate, wherein the light shielding film defines a light shielding region where the light shielding film is formed and a light transmission region on the transparent substrate where the light shielding film is not formed; and a phase inversion region formed on a predetermined portion of the light transmission region so as to allow exposure light to be transmitted therethrough with a phase of the light being inverted, wherein portions of the phase inversion region alternate with portions of the light transmission region in a predetermined direction, wherein each portion of the phase inversion region directly contacts at least two adjacent portions of the light transmission region in the predetermined direction and each portion of the light transmission region directly contacts at least two adjacent portions of the phase inversion region in the predetermined direction, wherein portions of the phase inversion region alternate with portions of the light shielding region in a direction perpendicular to the predetermined direction, wherein each portion of the phase inversion region directly contacts at least two adjacent portions of the light shielding region in the direction perpendicular to the predetermined direction, and wherein portions of the light transmission region alternate with portions of the light shielding region in the direction perpendicular to the predetermined direction, and each portion of the light transmission region directly contacts at least two adjacent portions of the light shielding region in the direction perpendicular to the predetermined direction.