Patent ID: 6924472

Claim:
An image sensor, comprising: a) a semiconductor substrate; b) a photosensor having, i) a first photosensing region including a first stack of one or more layers of transparent materials covering the substrate, the first photosensing region having a spectral response having first minima and first maxima as a function of wavelength of light; ii) a second photosensing region including a second stack of one or more layers of transparent materials covering the substrate, the second photosensing region having a spectral response having second maxima and second minima; and iii) a third photosensing region including a third stack of one or more layers of transparent materials covering the substrate, the third photosensing region having a spectral response having third maxima and third minima; and c) wherein at least one maximum or minimum of the spectral response of one of the photosensing regions is substantially matched with a minimum or maximum of another photosensing region such that the average special response of the photosensor has less variation with wavelength of light than the individual spectral responses of each of the separate photosensing regions.