Patent ID: 8173332

Claim:
A reflection-type exposure mask comprising: a main surface to be irradiated with exposure light; a multilayer reflective film provided in the main surface and serving as a high reflective region to the exposure light such; and an absorber pattern provided on the multilayer reflective film and configured to absorb the exposure light while serving as a low reflective region to the exposure light; wherein a phase difference between a reflection light of the exposure light from the multilayer reflective film and a reflection light of the exposure light from the absorber pattern is in a range of 180°±10°, and the absorber pattern comprises a first linear pattern, and a second linear pattern having a longitudinal direction perpendicular to that of the first linear pattern, the first and second patterns are configured such that contrast values of optical images of the first and second linear patterns on a wafer are to be 0.6 or more in a case where one of the longitudinal directions of the first and second patterns agree with an incident direction of the exposure light to the main surface viewed from above the main surface.