Patent ID: 9324754
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. An image sensor comprising: a pixel array including a central region and an edge; a first photo detecting device disposed in the central region of the pixel array; and a second photo detecting device disposed near an edge of the pixel array, wherein the second photo detecting device has a full well capacity that is less than a full well capacity of the first photo detecting device; wherein the image sensor further comprises: a third photo detecting device disposed in the pixel array portion between the first and second photo detecting devices, wherein the third photo detecting device has a full well capacity that is less than the full well capacity of the first photo detecting device and greater than the full well capacity of the second photo detecting device; a plurality of filters that pass specific wavelengths of light onto respective ones of the first, second and third photo detecting devices; and a plurality of air gap regions disposed between the plurality of filters, wherein respective refractive indices of each of the filters are greater than a refractive index of each of the air gap regions.