Patent ID: 7879640

Claim:
A method for manufacturing a Complementary Metal Oxide Semiconductor (CMOS) image sensor, the method comprising: forming a metal pad over a semiconductor substrate; forming a protection film over the semiconductor substrate and the metal pad; selectively removing the protection film to expose a surface of the metal pad; forming a first planarization film over the protection film; forming a color filter layer over the first planarization film; forming a second planarization layer over the color filter layer; forming a first material layer over the second planarization layer; forming a second material layer over the first material layer; and forming a micro lens out of the first and second material layers, wherein the first material layer comprises a Deep UltraViolet (DUV) photoresist material layer, and the second material layer comprises a Middle UltraViolet (MUV) photoresist material layer.