Patent ID: 8779348
Filing Date: 2014-07-15
Classification: G01J,H01L

Abstract:
1. A semiconductor device comprising: a photodiode configured to generate a first current by irradiation with a light; a circuit configured to generate a second current by supply of the first current; a first diode directly connected with the photodiode so that a bias direction of the first diode is the same as that of the photodiode; a second diode directly connected with the photodiode so that a bias direction of the second diode is the opposite to that of the photodiode; and a conductive film over the first diode, wherein a first terminal of the first diode is directly connected with a first terminal of the photodiode, wherein a first terminal of the second diode is directly connected with the first terminal of the photodiode, wherein a second terminal of the photodiode is directly connected with a first terminal of the circuit, wherein a second terminal of the first diode is directly connected with a second terminal of the circuit, wherein a second terminal of the second diode is directly connected with a third terminal of the circuit, and wherein the circuit comprises a first transistor and a second transistor, and a gate of the first transistor, a gate of the second transistor and the second terminal of the photodiode are directly connected to each other.