Patent ID: 7435616

Claim:
A method of fabricating a complementary metal-oxide-semiconductor image sensor, the method comprising: forming an insulating layer on a semiconductor substrate; forming a metal pad on the insulating layer; forming a first overcoat layer on the insulating layer including the metal pad; selectively removing the first overcoat layer to expose a portion of the metal pad; forming a protective layer on the exposed metal pad and the first overcoat layer; forming a color filter array on the protective layer; forming a second overcoat layer on the color filter array and the protective layer; selectively removing the second overcoat layer to remain on a photodiode region; performing a plasma surface treatment to the remaining second overcoat layer; forming a microlens on the plasma-surface-treated second overcoat layer; and selectively etching the protective layer to expose a surface of the metal pad after forming the microlens.