Patent ID: 9478691
Filing Date: 2016-10-25
CPC Classification: H01L

Claim Text:
1. A light-receiving and emitting device, comprising: an integrated light-receiving and emitting element in which a light-receiving element and a light-emitting element are disposed on one principal surface of a substrate, wherein the substrate is formed of a one conductivity type semiconductor, at least one electrode layer is disposed in at least a region corresponding to the light-receiving element and the light-emitting element on another principal surface of the substrate, the light-receiving element comprises a first other conductivity type semiconductor layer on a side of the one principal surface of the substrate, a first anode on an upper surface of the first other conductivity type semiconductor layer, and a first cathode on the one principal surface of the substrate, an operational amplifier in which an inverting input terminal is connected to the first anode and a non-inverting input terminal is connected to the first cathode and the electrode layer is further comprised, and the electrode layer, the first anode, and the first cathode are at a same potential.