Patent ID: 7981717

Claim:
A method of manufacturing an image sensor comprised of a pixel array region, a first isolation region, a second isolation region, and a peripheral region, the method comprising: forming a pixel array within the pixel array region; forming the first isolation region under the peripheral region and between the pixel array and the peripheral region to electrically isolate the pixel array from the peripheral region; forming the second isolation region on a partial upper side of the first isolation region to electrically isolate the pixel array from the peripheral region; and forming a logic circuit within the peripheral region, wherein the forming the pixel array comprises: forming a red photodiode on a sub-epitaxial layer of a first conductivity by performing implantation of ions of a second conductivity; forming a first epitaxial layer of the first conductivity on the red photodiode; forming a first plug in a portion of the first epitaxial layer by performing implantation of ions of the second conductivity so as to be electrically connected to the red photodiode; and forming a green photodiode on the first epitaxial layer by performing implantation of ions of the second conductivity.