Patent ID: 7936036

Claim:
A solid-state image sensor, comprising: a trench isolation region formed in a semiconductor substrate, and defining an element formation region; a photodiode region formed in the element formation region, for converting incident light to signal charges and accumulating the signal charges therein; a floating diffusion region formed in the element formation region, for accumulating the signal charges of the photodiode region; a gate electrode formed over the element formation region located between the photodiode region and the floating diffusion region, and formed so that both ends of the gate electrode respectively overlap a part of the photodiode region and a part of the floating diffusion region; and an inactive layer formed in a region located in a bottom portion and sidewall portions of the trench isolation region in the semiconductor substrate, wherein an impurity concentration in a region located under the gate electrode in the inactive layer is lower than that in a region other than the region located under the gate electrode in the inactive layer.