Image sensor and method of manufacturing the same
First Claim
1. A method of manufacturing an image sensor, comprising the steps of:
- a) forming a first diffusion layer within a semiconductor substrate, semiconductor substrate being doped of a first conductive dopant and the first diffusion layer being doped of a second conductive dopant;
b) forming a gate electrode on the semiconductor substrate, the gate electrode having a first sidewall and a second sidewall;
c) forming a second diffusion layer in the semiconductor substrate adjacent the first diffusion layer;
d) forming a first spacer at the first sidewall and a second spacer at the second sidewall;
e) forming a third diffusion layer in the second diffusion layer adjacent the first spacer, the third diffusion layer being doped with the first conductive dopant; and
f) forming a fourth diffusion layer within the semiconductor substrate adjacent the second spacer, the fourth diffusion layer being doped with the second conductive dopant, wherein a part of the first diffusion layer is under the fourth diffusion layer.
6 Assignments
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Accused Products
Abstract
Disclosed is a method of manufacturing an image sensor having light sensitivity over a photodiode equal in area to that of a unit pixel. The image sensor includes an image sensor comprising: a first semiconductor substrate doped with a first conductive dopant; a first diffusion layer formed in the semiconductor substrate and doped with a second conductive dopant; a second diffusion layer formed in the semiconductor substrate adjacent the first diffusion layer and having a width wider than a width of the first diffusion layer; a third diffusion layer doped with the first conductive dopant and formed at an exposed surface of the semiconductor substrate in the first diffusion layer; a gate electrode formed on the exposed surface and having a first edge adjacent to the third diffusion layer; and a fourth diffusion layer doped with the second conductive dopant and formed at the exposed surface adjacent a second edge of the gate electrode, the fourth diffusion layer defining a gap with the second diffusion layer.
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Citations
9 Claims
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1. A method of manufacturing an image sensor, comprising the steps of:
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a) forming a first diffusion layer within a semiconductor substrate, semiconductor substrate being doped of a first conductive dopant and the first diffusion layer being doped of a second conductive dopant;
b) forming a gate electrode on the semiconductor substrate, the gate electrode having a first sidewall and a second sidewall;
c) forming a second diffusion layer in the semiconductor substrate adjacent the first diffusion layer;
d) forming a first spacer at the first sidewall and a second spacer at the second sidewall;
e) forming a third diffusion layer in the second diffusion layer adjacent the first spacer, the third diffusion layer being doped with the first conductive dopant; and
f) forming a fourth diffusion layer within the semiconductor substrate adjacent the second spacer, the fourth diffusion layer being doped with the second conductive dopant, wherein a part of the first diffusion layer is under the fourth diffusion layer. - View Dependent Claims (2, 3, 4)
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5. A method of manufacturing an image sensor, comprising the steps of:
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a) forming a first diffusion layer within a semiconductor substrate, the semiconductor substrate being doped of a first conductive dopant and the first diffusion layer being doped of a second conductive dopant;
b) forming a gate electrode on the semiconductor substrate, the gate electrode having a first sidewall and a second sidewall;
c) forming a second diffusion layer in the semiconductor substrate adjacent the first diffusion layer;
d) forming a first spacer at the first sidewall and a second spacer at the second sidewall;
e) forming a third diffusion layer in the second diffusion layer adjacent the first spacer, the third diffusion layer being doped with the first conductive dopant;
f) forming a fourth diffusion layer within the semiconductor substrate adjacent the second spacer, the fourth diffusion layer being doped with the second conductive dopant; and
g) forming a fifth diffusion layer between the fourth diffusion layer and the first diffusion layer. - View Dependent Claims (6, 7, 8, 9)
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Specification