Patent ID: 8030115

Claim:
A method of manufacturing a solid-state image pickup device, the method comprising: forming a transparent film on a surface of a substrate including a plurality of photoelectric conversion elements which are two-dimensionally arranged therein, said substrate having a plurality of rectangular light-receiving faces each corresponding to one of the photoelectric conversion elements; forming a resist pattern having bobbin-shaped or deformed bobbin-shaped openings each being located in conformity with each of the rectangular light-receiving faces; etching the transparent film using the resist pattern as a mask to form a flattening layer having a plurality of approximately rectangular concave faces each located to correspond to one of the light-receiving faces; and forming a color filter including color layers of plural kinds of colors in the approximately rectangular concave faces and exhibiting a larger refractive index than that of the flattening layer, the color layers being respectively enabled to function as a convex lens; wherein the opening of the resist pattern has a shape in which an acute-angled space is extended in four directions from a rectangular opening, the transparent film is dry etched in conformity with the shape of the opening of the resist pattern, and the etching proceeds not only in a vertical direction but also in a lateral direction, and is enabled to spread to a portion of the transparent film which is covered by the resist pattern, thus forming the flattening layer wherein a plurality of approximately rectangular concave faces are directly neighboring each other.