Patent ID: 9224780
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. An image sensor, comprising: a photodiode to convert a received optical signal into photo charges and to output the photo charges; a sensing node, adjacent to the photodiode, to sense the photo charges, the sensing node including: a first dopant region having dopants of a first conductivity type, and a second dopant region having dopants of a second conductivity type, the second dopant region surrounding the first dopant region; a third dopant region adjacent to the second dopant region and having dopants of the first conductivity type, the third dopant region being disposed around the sensing node; and a driver to convert the sensed photo charges into an electrical signal and to output the electrical signal, wherein the first dopant region, the second dopant region, and the third dopant region are to operate as a source, a gate, and a drain of a junction field effect transistor, respectively.