Patent ID: 8766337

Claim:
A semiconductor device comprising: a substrate; and a first thin film diode and a second thin film diode supported by the substrate, wherein the first thin film diode includes a first semiconductor layer and a first light blocking layer disposed on the substrate side of the first semiconductor layer, the second thin film diode includes a second semiconductor layer and a second light blocking layer disposed on the substrate side of the second semiconductor layer, an insulating film is formed between the first semiconductor layer and the first light blocking layer and between the second semiconductor layer and the second light blocking layer, a thickness D 1 of a portion of the insulating film positioned between the first semiconductor layer and the first light blocking layer is different from a thickness D 2 of a portion of the insulating film positioned between the second semiconductor layer and the second light blocking layer, light in a first wavelength region and light in a second wavelength region including a wavelength larger than the maximum wavelength of the first wavelength region are incident on the first and the second semiconductor layers, and the first and the second light blocking layers have surfaces for reflecting the light in the first and the second wavelength regions, the intensity of light in the first wavelength region incident on the first semiconductor layer is higher than the intensity of light in the first wavelength region incident on the second semiconductor layer, and the intensity of light in the second wavelength region incident on the second semiconductor layer is higher than the intensity of light in the second wavelength region incident on the first semiconductor layer.