Patent ID: 8203194

Claim:
An image sensor comprising: a substrate including devices and a circuit formed thereon, wherein the devices include gate electrodes and a photodiode configured to receive light; a metal wiring of a transparent conductive material formed on the substrate, wherein the metal wiring is configured to transfer data signals from the devices to the circuit, wherein the metal wiring is formed, at least in part, on a region over the photodiode such that the metal wiring and the photodiode overlap, and wherein the metal wiring includes: a lower metal wiring; a plug formed on the lower metal wiring; and an upper metal wiring formed on the plug, wherein each of the lower metal wiring, the plug, and the upper metal wiring are formed over the photodiode such that they each overlap the photodiode; a passivation film formed on the metal wiring, wherein the passivation film is configured to protect the devices; a color filter formed on the passivation film, wherein the color filter is configured to embody an image; and a microlens formed on the color filter, wherein the microlens is configured to collect light; wherein the color filter is located between the passivation film and the microlens, and wherein the lower metal wiring, the plug, and the upper metal wiring are located between the microlens and the photodiode; and wherein the photodiode is configured to receive light from the microlens, and wherein light incident on the photodiode passes through the metal wiring.