Patent ID: 7675099

Claim:
An image sensor comprising: a pixel semiconductor pattern disposed on a substrate; an interlayer insulating layer interposed between the pixel semiconductor pattern and the substrate; a photodiode in the pixel semiconductor pattern; a base multi-layered reflection layer interposed between the photodiode and the interlayer insulating layer, wherein the base multi-layered reflection layer includes a plurality of layers with different refractive indexes relative to each other, and a refractive index of a layer of the base multi-layered reflection layer that contacts the pixel semiconductor pattern is different from a refractive index of the pixel semiconductor pattern; and wherein the base multi-layered reflection layer includes a first base reflection layer and a second base reflection layer that are stacked, wherein: the first base reflection layer has a refractive index that is lower than refractive indexes of the second base reflection layer and the pixel semiconductor pattern, a layer of the base multi-layered reflection layer that contacts the pixel semiconductor pattern is the first base reflection layer, and the first and second base reflection layers are alternatingly stacked at least once a sidewall multi-layered reflection layer disposed on a sidewall of the pixel semiconductor pattern, wherein the sidewall multi-layered reflection layer surrounds the photodiode.