Patent ID: 9658524
Date: 2017-05-23
CPC Classifications: G03F

Claim:
1. A photomask comprising: a translucent substrate; a light blocking member provided on the translucent substrate for blocking exposure light; a main pattern portion provided in a first region of the light blocking member corresponding to a desired pattern, the main pattern portion being an opening of the light blocking member; and an auxiliary pattern portion provided in a second region of the light blocking member surrounding a position corresponding to the desired pattern and along a side constituting an outline portion of the desired pattern, the auxiliary pattern portion including a plurality of in-phase auxiliary patterns, each of the plurality of in-phase auxiliary patterns being an opening of the light blocking member transmitting in-phase light in which a phase is matched with a phase of light transmitted through the main pattern portion, wherein: each of the plurality of in-phase auxiliary patterns is provided at a distance of √(2×n×G×λ) from the side constituting the outline portion of the desired pattern, and the exposure light transmitted through the auxiliary pattern portion is projected on an exposed body to form a projection image having light intensity emphasized at the side constituting the outline portion of the desired pattern (where G is a gap length between the photomask and the exposed body, λ is a wavelength of the exposure light, and n is a natural number).