Patent ID: 7307250

Claim:
A light-receiving element, comprising: a substrate; a columnar part provided on the substrate; a top surface of the columnar part including a light-receiving surface; an anti-reflective layer provided on the light-receiving surface; and an optical member provided on a top surface of the anti-reflective layer, a diameter of the optical member being greater than a diameter of the top surface of the columnar part, the maximum value of the diameter of the optical member being larger than the diameter of the lower surface of the optical member; the columnar part including a first conductive type layer, a light absorbing layer, and a second conductive type layer; the light absorbing layer being formed between the first conductive type layer and the second conductive type layer; and the light receiving surface being a top surface of the second conductive type layer, in a vicinity of the columnar part, an insulating layer having a thicker film thickness as the insulating layer becomes closer to the columnar part.