Patent ID: 8294231

Claim:
An optical sensing device, comprising: a silicon-on-insulator (SOI) substrate which includes a semiconductor support substrate, an insulating layer located on the semiconductor support substrate, and a semiconductor layer located on the insulating layer; a visible light sensor located in the semiconductor support substrate; and an ultraviolet ray sensor located in the semiconductor layer, the ultraviolet ray sensor comprising an ultraviolet photodiode configured by a low-concentration region of a first conductivity type formed within the semiconductor layer, a first high-concentration region of a second conductivity type formed adjacent to the low-concentration region, and a second high-concentration region of the first conductivity type formed adjacent to the low-concentration region, wherein the low-concentration region is sandwiched between the first and second high-concentration regions, and wherein an impurity concentration of the first and second high-concentration regions is greater than an impurity concentration of the low-concentration region, and the first and second high-concentration regions have a thickness greater than a thickness of the low-concentration region.