Patent ID: 7453109

Claim:
A solid-state image sensor including a substrate, light-receiving sections placed on the substrate, a plurality of wiring layers, a plurality of interlayer insulating layers, and a first insulating layer, the wiring layers and the interlayer insulating layers being alternately arranged on the substrate, at least one of the wiring layers being placed on the first insulating layer, the solid-state image sensor comprising: a second insulating layer which is placed on the wiring layer on the first insulating layer, which has portions in contact with the first insulating layer, the portions being located at the positions corresponding to the light-receiving sections, and which has a refractive index different from that of the first insulating layer; a third insulating layer which is placed above the light-receiving sections and which reduces reflected light from the interface between the substrate and the interlayer insulating layer placed on the substrate; and a fourth insulating layer having a refractive index different from that of the second insulating layer and that of the first insulating layer, wherein the fourth insulating layer is placed between the first insulating layer and the second insulating layer, wherein the wiring layer on the first insulating layer is between the second insulating layer and the first insulating layer.