Patent ID: 7659929

Claim:
A solid-state image sensor comprising a plurality of unit pixel cells arranged in a matrix form, wherein each respective unit pixel cell of said plurality of unit pixel cells includes: a respective photoelectric conversion element formed on a semiconductor substrate; a respective color filter formed on said respective photoelectric conversion element; a respective transparent film formed on said respective color filter; and a respective micro-lens formed on said respective transparent film, wherein a thickness at a center of each respective color filter of said plurality of color filters is greater than a thickness at a periphery of each respective color filter, wherein only said respective transparent film is located between each respective color filter of said plurality of unit pixel cells, wherein each respective color filter of said plurality of color filters adjoins another color filter of said plurality of color filters, such that an edge of a bottom surface of each respective color filter in a vertical and a horizontal direction adjoins an edge of a bottom surface of another color filter in the matrix form arrangement of said unit pixel cells, and wherein a cross-section of each respective color filter of the plurality of unit pixel cells has an upward convex lens shape.