Patent ID: 7880257
Filing Date: 2011-02-01
Classification: H01L

Abstract:
1. An image sensor comprising: a semiconductor layer; and a plurality of unit pixels including red unit pixels, green unit pixels, and blue unit pixels in the semiconductor layer, wherein the red, green, and blue unit pixels are configured to accumulate charges corresponding to incident light having wavelengths in the red, green, and blue regions, respectively, each of the plurality of unit pixels includes a first impurity region of a first conductivity type that is configured to accumulate charges corresponding to incident light of a respective wavelength, the red unit pixels include second impurity regions of the first conductivity type below the first impurity regions, and the green unit pixels include third impurity regions of the first conductivity type below the first impurity regions and at about an equal depth as the second impurity regions, a width of the third impurity regions is smaller than a width of the second impurity regions.