Patent ID: 11862739
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A light-receiving device comprising:
a substrate comprising a first reflection surface and a second reflection surface; and
a plurality of light-receiving elements arranged in a row on a main surface of the substrate;
wherein the first reflection surface and the second reflection surface extend along the row of the plurality of light-receiving elements,
wherein the plurality of light-receiving elements are between the first reflection surface and the second reflection surface,
wherein each of the plurality of light-receiving elements includes a back-incident photodiode including:
a first semiconductor layer on the substrate and made of a first conductive type semiconductor;
a light absorbing layer on the first semiconductor layer and made of a semiconductor;
a second semiconductor layer on the light absorbing layer and made of a second conductive type semiconductor;
a reflection layer on the second semiconductor layer;
a first electrode connected to the second semiconductor layer; and
a second electrode connected to the first semiconductor layer,

wherein each of the first reflection surface and the second reflection surface includes an inclined surface extending from the main surface of the substrate to a back surface of the substrate,
wherein an angle formed between the main surface of the substrate and the first reflection surface is obtuse, and
wherein an angle formed between the main surface of the substrate and the second reflection surface is obtuse.