Patent ID: 9654712
Date: 2017-05-16
CPC Classifications: H01L,H04N

Claim:
1. An imaging pixel comprising: an upper substrate layer; a lower substrate layer; a floating diffusion region; a photodiode in the upper substrate layer that is coupled to the floating diffusion region; an interconnect layer interposed between the upper substrate layer and the lower substrate layer that couples the upper substrate layer to the lower substrate layer; a first storage capacitor in the lower substrate layer; a source follower transistor coupled to the floating diffusion region; an additional floating diffusion region; an additional source follower transistor coupled to the additional floating diffusion region; and a sampling transistor coupled between the source follower transistor and the additional floating diffusion region, wherein the floating diffusion region and the source follower transistor are formed in the upper substrate layer, and wherein the additional floating diffusion region and the additional source follower transistor are formed in the lower substrate layer.