Patent ID: 8710534

Claim:
A semiconductor light-receiving device comprising: two lenses provided on a semiconductor substrate; and a concave region surrounding the two lenses, a sidewall positioned along an edge of the concave region having an upper edge and a lower edge, a height of the sidewall being higher than a top of the lenses, a distance between a position H and the lower edge of the sidewall in a direction vertical to a line segment C 1 being grater than following condition (1): {( r+L ) 2 −( W/ 2) 2 } 1/2 (1) where: C 1 is a line segment connecting centers of the two lenses; H is a midpoint of the line segment C 1 ; r is a radius of the lenses; W is an interval between the centers of the two lenses; and C 2 is a lines passing through the centers of the lenses in a direction vertical to the line segment C 1 , wherein; the lower edge of the concave portion in an outer side of a region between the lines C 2 is concentrically formed so as to have a distance of (r+L) from the center of the lenses; and W is following condition (2): W< 2( r+L ) (2).