ALTERNATIVE PHASE-SHIFTING MASK AND MANUFACTURING METHOD THEREOF

摘要

A method of manufacturing an alternative phase-shifting mask, includes forming first and second patterns on a transparent substrate to be adjacent to each other, the first and second patterns are transmittable and the second pattern having a recessed portion of the substrate for phase-shifting. A laser light is irradiated to sidewall portions of the recessed portion to modify the sidewall portions such that a transmittance of the sidewall portions to exposure light is lower than that of a bottom portion of the recessed portion.