Patent ID: 9496310
Filing Date: 2016-11-15
CPC Classification: H01L

Claim Text:
1. A photodetector comprising: a semiconductor substrate with a first face and a second face that is opposite to the first face; a groove formed on the second face of the semiconductor substrate; a plurality of pixels disposed to the semiconductor substrate, each pixel including: a plurality of light detection cells disposed on the first face of the semiconductor substrate, each light detection cell having a first terminal and a second terminal that connect to the semiconductor substrate, each light detection cell being surrounded by the groove when viewed from a side of the second face of the semiconductor substrate; a first wiring line disposed on the first face of the semiconductor substrate to connect to the first terminal of each of the light detection cells; a first opening formed in the second face of the semiconductor substrate, the first opening penetrating the semiconductor substrate to expose a part of the first wiring line; a first insulating film covering the second face of the semiconductor substrate, a side face of the first opening, and a side face and a bottom of the groove; a second opening formed in the first insulating film to expose a part of the second face of the semiconductor substrate; a first electrode disposed in the first opening to connect to the first wiring line; a second electrode disposed in the second opening to connect to the second surface of the semiconductor substrate; and a light blocking material filled to the groove.