Patent ID: 8716761
Filing Date: 2014-05-06
Classification: H01L

Abstract:
1. An apparatus comprising: a semiconductor substrate; a light receiving device formed in the semiconductor substrate, wherein the light receiving device is configured to receive light and generate electrons in response to the received light; at least one electron collecting device formed in the semiconductor substrate, wherein said at least one electron collecting device is configured to receive at least a portion of the electrons generated by the light receiving device; a first device isolation film configured to isolate the light receiving device from said at least one electron collecting device, wherein said at least one electron collecting device is located separate from the first device isolation film, wherein said at least one electron collecting device comprises a first electron collecting device isolated from the light receiving device by the first device isolation film and a second electron collecting device isolated from the first electron collecting device, wherein the first electron collecting device is adjacent to the second electron collecting device; a second device isolation film, wherein the second device isolation film is configured to isolate the first electron collecting device and second electron collecting device; and a shielding film formed over the semiconductor substrate, wherein the shielding film is configured to shield said at least one electron collecting device from light.