Patent ID: 7759679

Claim:
A solid-state imaging device comprising: a first filter unit having a first bandpass wavelength, the first filter unit including a first upper λ/4 multilayer film, a first lower λ/4 multilayer film and a first insulation film sandwiched between the first upper λ/4 multilayer film and the first lower λ/4 multilayer film, a second filter unit having a second bandpass wavelength different from the first bandpass wavelength, the second filter unit including a second upper λ/4 multilayer film, a second lower λ/4 multilayer film and a second insulation film sandwiched between the second upper λ/4 multilayer film and the second lower λ/4 multilayer film, wherein the optical thickness of the first insulation film is different from the one of the second insulation film, the upper λ/4 multilayer film and the lower λ/4 multilayer film of a first filter unit and the second filter unit have substantially the same center wavelength, each upper λ/4 multilayer film and lower λ/4 multilayer film includes: a first dielectric layer made of a material having a different refractive index from a material forming the first insulation film; and a second dielectric layer made of a material having a substantially same refractive index as the material forming the second insulation film, the first dielectric layer is formed so as to be in contact with a main surface of the first insulation film, and the second dielectric layer is formed so as to be in contact with a main surface of the first dielectric layer which faces away from the second insulation film, each first dielectric layer has substantially a same optical thickness and each second dielectric layer has substantially a same optical thickness, and each of the first filter unit and the second filter unit transmits light received by a different light-receiving unit.