Patent ID: 7384813

Claim:
A method for fabricating a CMOS image sensor, comprising: forming a metal line pattern; forming a pad film on the metal line pattern; forming a passivation film on the pad film; forming a recess by etching the passivation film using a photoresist mask for forming a microlens having a desired shape; sequentially depositing a high-density plasma oxide film and an O 3 tetra-ethyl-ortho-silicate film on the etched passivation film, wherein depositing the high-density plasma oxide film provides a conic microlens structure of photoresist on a microlens base; and etching back the high density plasma oxide film and the O 3 tetra-ethyl-ortho-silicate film to form a main lens curvature on a surface of the etched passivation film and a sidewall spacer type lens at inner sidewalls of the recess of the etched passivation film, thereby forming a dual-lens structure.