Patent ID: 8704323

Claim:
A solid state image forming device, comprising: a plurality of photodiode layers formed on a semiconductor substrate in a lattice; a plurality of color filters arranged in a lattice corresponding to the positions of the plurality of photodiode layers; a planarizing layer formed on a first surface of the semiconductor substrate; a plurality of first microlenses each of which has a convex surface, the plurality of first microlenses formed on the planarizing layer so that the plurality of first microlenses are arranged checkerwise corresponding to the positions of the plurality of photodiode layers and outer peripheries of the plurality of first microlenses are in contact with each other in a diagonal direction with respect to a lattice arrangement of the plurality of photodiode layers; and a plurality of second microlenses each of which has a convex surface, the plurality of second microlenses formed on the planarizing layer so that the plurality of second microlenses are formed to fill gaps between the first microlenses and outer peripheries of the plurality of second microlenses are in contact with each other in a diagonal direction with respect to the lattice arrangement of the plurality of photodiode layers, wherein the first and the second microlenses are formed so that outer peripheries of the first and second microlenses are in contact with each other in a horizontal direction and a vertical direction with respect to the lattice arrangement of the plurality of photodiode layers.