Patent ID: 9013612
Filing Date: 2015-04-21
Classification: H01L

Abstract:
1. An image sensor, comprising: a layer of photosensitive devices; dielectric stack layers that include at least one metal layer with metal lines and at least one via layer with vias and that are formed above the layer of photosensitive devices, wherein the dielectric stack layers cover the photosensitive devices; a first antireflective layer that is formed on the dielectric stack layers; a passivation layer that is formed above the first antireflective layer; a second antireflective layer that is formed above the passivation layer; and a color filter array layer that is formed above the second antireflective layer, wherein the dielectric stack layers have a first index of refraction, wherein the passivation layer has a second index of refraction that is different than the first index of refraction, and wherein the first antireflective layer has a third index of refraction that is between the first and second indices of refraction.