Patent ID: 7349159

Claim:
A mold for manufacturing a microlens substrate provided with a plurality of microlenses each having a predetermined substantially elliptic convex shape, the mold being used to press a base material of the microlens substrate to form the plurality of microlenses thereon, wherein the mold has a roll shape having an outer peripheral surface, and a plurality of concave portions each having a substantially elliptic shape corresponding to the convex shape of each microlens being provided on the outer peripheral surface of the mold for pressing the base material of the microlens substrate, and the plurality of concave portions being formed by an etching process with a mask, the plurality of concave portions arranged on the outer peripheral surface of the mold for manufacturing the microlens substrate in a houndstooth check manner, and wherein the microlens substrate manufactured using the mold has a usable area where the plurality of microlenses are formed and an area occupied by the plurality of microlenses in the usable area, wherein the plurality of concave portions are arranged on the outer peripheral surface of the mold so that a ratio of the area with respect to the entire usable area is in the range of 97 to 99.5% when the microlens substrate is manufactured using the mold.