Patent ID: 7491596

Claim:
A method for integrating a CMOS image sensor with 1T-SRAM, comprising the following steps: providing a substrate having a pixel array part, a logic circuit part, and a memory part; forming a plurality of wells and shallow trench isolation (STI) regions in the pixel array part, the logic circuit part, and the memory part; forming at least a bottom capacitor plate in the well in the memory part; forming a dielectric layer on the substrate, wherein the dielectric layer is used as a gate dielectric layer for a plurality of transistors of the pixel array part and the logic circuit part, and as a capacitor dielectric layer for a capacitor structure in the memory part; forming a plurality of the gates of the transistors on the dielectric layer in the pixel array part, the logic circuit part, and the memory part; forming a plurality of image sensor devices in the pixel array part; and forming sources and drains of the transistors in the substrate.