Patent ID: 8067301
Filing Date: 2011-11-29
Classification: H01L

Abstract:
1. A method of forming an image sensor, comprising: (i) sequentially forming a gate oxide layer, a first conductive layer, a dielectric layer, and a second conductive layer on a semiconductor substrate; (ii) patterning the second conductive layer and the dielectric layer to form an ion-implantation interrupting pattern having sides; (iii) patterning the first conductive layer to form a gate electrode pattern having sides and being larger than the ion-implantation interrupting pattern so that one side of the ion-implantation interrupting pattern and one side of the gate electrode pattern are vertically aligned with each other; (iv) forming a first impurity diffusion region at the semiconductor substrate aligned with one side of the ion-implantation interrupting pattern and one side of the gate electrode pattern; (v) forming an impurity diffusion region of a first conductivity type in the first impurity diffusion region, the first impurity diffusion region being of a second conductivity type; and (vi) forming a second impurity diffusion region of the second conductivity type at the semiconductor substrate aligned with the other side of the gate electrode pattern.