Patent ID: 7626685

Claim:
A distance measuring sensor, comprising: a photoelectric conversion region; a first charge storage region; a second charge storage region; a first trench; a second trench; a first vertical photogate; and a second vertical photogate; wherein the photoelectric conversion region is in a substrate, wherein the photoelectric conversion region is doped with a first impurity in order to generate charges in response to received light, wherein the first and second charge storage regions are in the substrate, wherein the first and second charge storage regions are doped with a second impurity in order to collect charges, wherein the first and second charge storage regions are separated from each other, wherein the first trench is formed to have a depth in the substrate that corresponds to the first charge storage region, wherein the second trench is formed to have a depth in the substrate that corresponds to the second charge storage region, wherein the first vertical photogate is in the first trench, and wherein the second vertical photogate is in the second trench.