Patent ID: 7741667
Filing Date: 2010-06-22
Classification: H01L

Abstract:
1. A CMOS (complementary metal oxide semiconductor) image sensor comprising: a semiconductor substrate having device isolation regions and active regions; a device isolation layer formed on the device isolation regions of the semiconductor substrate; gate electrodes formed on the active regions; a plurality of photodiode regions formed at a predetermined interval in the active regions and each photodiode region with at least one gate electrode of the gate electrodes isolated by the device isolation layer; an interlayer insulating layer formed above an entire surface of the semiconductor substrate; a refracting layer passing through the interlayer insulating layer and formed directly on portions of the device isolation layer, wherein the interlayer insulating layer and the refracting layer perform as a waveguide, wherein the refracting layer has a greater refractive index than the interlayer insulating layer; a planarizing layer formed on an entire surface of the semiconductor substrate including the refracting layer; a color filter layer formed on the planarizing layer and including a plurality of color segments corresponding respectively to the photodiode regions; and a microlens formed respectively on each color segment of the color filter layer, wherein the planarizing layer includes a level upper surface and is disposed between the color filter layer and the refracting layer, wherein the refracting layer is directly contacted with the planarizing layer and is disposed below the color filter layer at a region corresponding to a boundary of each color segment.