Patent ID: 9349769
Filing Date: 2016-05-24
CPC Classification: H01L

Claim Text:
1. A structure comprising: a substrate comprising photo diodes, the substrate having a first side and a second side opposite from the first side; an interconnect structure on the first side of the substrate; an oxide layer on the second side of the substrate; an additional layer over the oxide layer, recesses extending through the additional layer and the oxide layer and corresponding to the photo diodes, the recesses having a depth in the oxide layer less than a thickness of the oxide layer; a reflective guide material on a sidewall of the additional layer and the oxide layer of each of the recesses; and color filters each being disposed in a respective one of the recesses, the oxide layer and the reflective guide material forming a grid among the color filters, at least a portion of the oxide layer and a portion of the reflective guide material being disposed between neighboring color filters.