Patent ID: 9224883
Filing Date: 2015-12-29
Classification: G01S,H01L

Abstract:
1. An optical sensor comprising: a semiconductor substrate having a first surface on which an insulation film is formed; a light receiving part formed in an outer layer of the first surface of the semiconductor substrate; and an electrode formed on the first surface through the insulation film, wherein: the light receiving part has a light receiving element which changes light into electric charge, and a reset element which discharges the electric charge accumulated in the light receiving element, the electrode has a first electrode that applies a control voltage to the reset element, the first electrode has a light shielding property, a shape of a light receiving surface of the light receiving element is defined by the first electrode, the semiconductor substrate is a first conductivity type, a plurality of diffusion layers is formed in an outer layer of the first surface of the semiconductor substrate, the plurality of diffusion layers being a second conductivity type different from the first conductivity type, at least one of the plurality of diffusion layers forms the light receiving element, and at least one of the plurality of diffusion layers forms a circuit pattern, the diffusion layer forming the light receiving element and the diffusion layer forming the circuit pattern are distanced from each other by a predetermined distance, and a part of the electrode is located on the first surface between the diffusion layer forming the light receiving element and the diffusion layer forming the circuit pattern, and when a control voltage is applied to the electrode, a channel is formed between the diffusion layer forming the light receiving element and the diffusion layer forming the circuit pattern, and the diffusion layer forming the light receiving element and the diffusion layer forming the circuit pattern are electrically connected.