Patent ID: 8283743

Claim:
A photodiode comprising: a silicon semiconductor layer; a P-type high concentration diffusion layer formed in the silicon semiconductor layer, said P-type high concentration diffusion layer including a P-type impurity diffused therein at a high concentration; an N-type high concentration diffusion layer formed in the silicon semiconductor layer, said N-type high concentration diffusion layer including an N-type impurity diffused therein at a high concentration; a low concentration diffusion layer with one of the P-type impurity and the N-type impurity diffused therein at a low concentration, said low concentration diffusion layer being formed in the silicon semiconductor layer, so that the P-type high concentration diffusion layer and the N-type high concentration diffusion layer are arranged to face each other with the low concentration diffusion layer in between; an interlayer insulation film formed on the silicon semiconductor layer; an UV-A filter disposed between the low concentration diffusion layer and the interlayer insulation film for blocking ultraviolet light, said UV-A filter including a covalent bond between silicon and hydrogen adjacent to the interlayer insulation film; a first contact plug formed in the interlayer insulation film and contacting with the N-type high concentration diffusion layer; and a first wiring portion formed on the interlayer insulation film and contacting with the first contact plug, said first wiring portion being arranged in a first area where the low concentration diffusion layer does not exist on an opposite side of the interlayer insulation film.