Patent ID: 9349771
Filing Date: 2016-05-24
CPC Classification: B29D,G02B,H01L

Claim Text:
1. A method for forming a plurality of microlenses arrayed in a matrix, the method comprising: a first step of forming, on a first member, a second member made of a material different from the first member; a second step of shaping an upper surface of the second member into a concavo-convex shape including a plurality of convex portions and a plurality of concave portions, by performing exposure processing using a grayscale mask, and then developing the second member; and a third step of forming the plurality of microlenses, corresponding to the plurality of convex portions, from at least the first member by etching the shaped second member and the first member, wherein in the third step, the etching of the second member and the etching of the first member are performed under a condition that an etching rate of the first member is higher than an etching rate of the second member, a portion of the first member under a concave portion of the second member is exposed during the etching of the second member, and the exposed portion of the first member is removed in the etching of the first member, wherein the plurality of convex portions include: third step is covered by a portion out of the concave portion of the second member located between the first convex portion and the second convex portion.