Patent ID: 8389921

Claim:
An image sensor, comprising: an array of imaging pixels disposed within a semiconductor layer, wherein each imaging pixel in the array of imaging pixels includes a photosensitive element configured to receive light from a backside of the image sensor; an insulator layer disposed on a frontside of the semiconductor layer; and a plurality of metal reflectors disposed within the insulator layer to reflect the light to a respective photosensitive element, wherein a width of each of the plurality of metal reflectors is equal to a width of a metal reflector at the center of the array multiplied by a scaling factor, wherein the scaling factor is dependent on a distance of the metal reflector from the center of the array, and wherein the plurality of metal reflectors includes a first metal reflector disposed generally along a first axis of the image sensor and a second metal reflector disposed generally along a second axis of the image sensor, wherein the first metal reflector and the second metal reflector are a same distance from the center of the array and wherein a width of the first metal reflector is different than a width of the second metal reflector.