Patent ID: 7968963

Claim:
A photodiode array comprising a semiconductor laminate having a first conductivity-type semiconductor layer, an absorption layer located above the first conductivity-type semiconductor layer, and a window layer formed on the surface of the absorption layer, and a plurality of photodiodes arranged thereon, wherein each adjacent pair of the photodiodes has an anti-crosstalk portion therebetween, each of the photodiodes has a second conductivity-type area extending inward from the surface side of the semiconductor laminate, the anti-crosstalk portion has a second conductivity-type area extending inward from the surface side of the semiconductor laminate, an inner end of the second conductivity-type area of the anti-crosstalk portion, namely a front, is closer to a back surface of the semiconductor laminate than a front of the second conductivity-type area of each of the photodiodes, and a thickness of the window layer is larger in the photodiodes than in the anti-crosstalk portion.