Patent ID: 8368160

Claim:
An image sensing device, comprising: a substrate having a first conductivity type; an epitaxy layer having the first conductivity type disposed on the substrate, comprising a first pixel area corresponding to a first incident light, a second pixel area corresponding to a second incident light, wherein wavelength of the first incident light is longer than that of the second incident light; a photodiode disposed in an upper portion of the epitaxy layer; and a first deep well for reducing pixel-to-pixel talk of the image sensing device disposed in a lower portion of the epitaxy layer in the second pixel area, wherein at least a portion of the epitaxy layer in first pixel area does not comprise the first deep well; wherein the first deep well has the first conductivity type, and the image sensing device further comprises a second deep well having a second conductivity type under the first deep well; wherein the second deep well is at least disposed in the first, second and third pixel area, and the portion of the first pixel area not comprising the first deep well comprises the second deep well.