Patent ID: 8415193
Filing Date: 2013-04-09
Classification: H01L

Abstract:
1. A method for manufacturing a solid state image forming device comprising: forming a transparent resin layer on a first surface of a semiconductor substrate having a plurality of photodiode layers formed thereon in a lattice; forming a plurality of first microlens mother die materials on the transparent resin layer so as to be arranged checkerwise corresponding to the positions of the plurality of photodiode layers and to be separated from each other; forming a plurality of first microlens mother dies so as to be separated from each other, wherein the plurality of first microlens mother dies are formed by a heat treatment of the plurality of first microlens mother die materials; forming a plurality of second microlens mother die materials in such a manner that they are arranged between the plurality of first microlens mother dies respectively, and are overlapped with outer peripheries of the plurality of first microlens mother dies in horizontal and vertical directions with respect to a lattice arrangement of the plurality of photodiode layers and are separated from each other in a diagonal direction with respect to the lattice arrangement; forming a plurality of second microlens mother dies so as to be overlapped with outer peripheries of the plurality of first microlens mother dies in the horizontal and vertical directions and separated from each other in the diagonal direction, wherein said plurality of second microlens mother dies are formed by a heat treatment of the plurality of second microlens mother die materials; and forming a plurality of first microlenses and a plurality of second microlenses by etching the transparent resin layer by using the plurality of first microlens mother dies and the plurality of second microlens mother dies as masks, wherein the transparent resin layer is etched so that the plurality of first microlenses and the plurality of second microlenses which are formed are in contact with each other.