Image sensor and manufacturing method of image sensor
A technology of an image sensor and a manufacturing method, which is applied in the field of semiconductors, can solve the problems of low transmission efficiency of photogenerated carriers, achieve high transmission rate and improve transmission efficiency
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[0037] In the existing image sensor, since the floating diffusion region is a heavily doped region, the transmission efficiency of photogenerated carriers is limited, and the transmission efficiency of photogenerated carriers is low.
[0038] To this end, the present invention provides an image sensor, wherein the second conductivity type shallow doped region is provided in a first conductivity type semiconductor substrate under the gate, and the second conductivity type shallow doped region In contact with the floating diffusion region, the shallow doped region of the second conductivity type is equivalent to the epitaxial part of the floating diffusion region, so that when photo-generated carriers are transported in the channel, they are likely to be subjected to the second conductivity due to the potential in the transmission channel. The type-doped region and the adjacent floating diffusion region attract, the photo-generated carrier transmission rate is higher, and the bridge...
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