Patent ID: 7932976

Claim:
A method of manufacturing a reflector for reflecting incident light from outside comprising the steps of: coating photosensitive resin on a substrate; exposing the photosensitive resin by use of a photomask, the photomask including a light-shielding region where a piece of a pattern is formed in a size equal to or larger than a resolution limit, a first transmissive region where a piece of a pattern is formed in a size smaller than the resolution limit, and a second transmissive region having higher optical transmittance than the first transmissive region, wherein a part of the first transmissive region is located between the light-shielding region and the second transmissive region; performing development of the photosensitive resin after the exposure and then forming three regions having different film thicknesses; subjecting the photosensitive resin to a heat treatment after the development; and forming a reflective film on the photosensitive resin after the heat treatment.