Patent ID: 8203846
Filing Date: 2012-06-19
Classification: G01J,H01L

Abstract:
1. A semiconductor photodetector element, comprising: a first light receiving element portion which is formed in a semiconductor layer of one conductivity type; a second light receiving element portion which is formed in the semiconductor layer and has the same structure as that of the first light receiving element portion; a multi-layer film which is formed on the semiconductor layer; a first filter which is formed above the first light receiving element portion across the multi-layer film and transmits light in a first wavelength range and light in a second wavelength range, which differs from the first wavelength range; and a second filter which is formed above the second light receiving element portion across the multi-layer film and transmits light in a third wavelength range, which is contained within the second wavelength range, wherein the multi-layer film is, in a part thereof above the first and second light receiving element portions, composed of an organic material film and an oxide film, and, in another part thereof, composed of the organic material film, a nitride film, and the oxide film, and the semiconductor photodetector element is structured to calculate a difference between a detection signal of the first light receiving element portion and a detection signal of the second light receiving element portion.