Patent ID: 9711561
Date: 2017-07-18
CPC Classifications: H01L,H04N

Claim:
1. An imaging device, comprising: a plurality of photoelectric conversion elements including a first photoelectric conversion element and a second photoelectric conversion element; a floating diffusion portion; a first transfer transistor configured to transfer charges generated in the first photoelectric conversion element to the floating diffusion portion; an impurity diffusion isolation region, a first portion of the impurity diffusion isolation region being formed between the first photoelectric conversion element and the second photoelectric conversion element; a first discrete trench isolation structure; and a second discrete trench isolation structure on an opposite side of the floating diffusion portion as the first discrete trench isolation structure, wherein the floating diffusion portion contacts a portion of the first discrete trench isolation structure, a gate electrode of the first transfer transistor covers a portion of the first discrete trench isolation structure, and the first discrete trench isolation structure is surrounded by a second portion of the impurity diffusion isolation region.