Patent ID: 8674282
Filing Date: 2014-03-18
Classification: H01L,H04N

Abstract:
1. A pumped pixel including: a first photo-diode accumulating charge in response to impinging photons, a second photo-diode and a floating diffusion positioned on a substrate of the pixel; a charge barrier positioned on the substrate between the first photo-diode and the second photo-diode, the charge barrier temporarily blocking charge transfer between the first photo-diode and the second photo-diode; a pump gate positioned on the substrate adjacent to the charge barrier, the pump gate pumping the accumulated charge from the first photo-diode to the second photo-diode through the charge barrier in response to a pump voltage applied by a controller; and a transfer gate positioned on the substrate between the second photo-diode and the floating diffusion, the transfer gate transferring the pumped charge from the second photo-diode to the floating diffusion in response to a transfer voltage applied by a controller.