Patent ID: 9674493
Date: 2017-06-06
CPC Classifications: H01L,H04N

Claim:
1. An image sensor, comprising: a pixel array including a plurality of pixels arranged in a semiconductor layer; a color filter array including a plurality of groupings of filters disposed over the pixel array, wherein each filter is optically coupled to a corresponding one of the plurality of pixels, wherein each one of the plurality of groupings of filters includes a first, a second, a third, and a fourth filter having a first, a second, the second, and a third color, respectively, and wherein each one of the plurality of groupings of filters forms a 2×2 Bayer pattern, wherein the first filter is next to the second filter and the third filter, the second filter is next to the first filter and the fourth filter, the third filter is next to the first filter and the fourth filter, and the fourth filter is next to the second filter and the third filter; and a metal layer disposed between the third filter in the color filter array and the pixel array, wherein the metal layer is patterned to include a metal mesh having mesh openings with a size and pitch to block incident light having a fourth color from reaching the corresponding pixel through the third filter of each one of the plurality of groupings of filters, wherein the first color is red, wherein the second color is green, wherein the third color is blue, and wherein the fourth color is infrared, and wherein the metal layer is patterned to include openings without the metal mesh to allow the incident light to reach the corresponding pixels through the first, second, and fourth filters of each one of the plurality of groupings of filters.