Patent ID: 6524772
Filing Date: 2003-02-25
Classification: G02B,H01L

Abstract:
A method of manufacturing a phase grating image sensor, said method comprising:providing a substrate having a plurality of photosensitive devices thereon, a first flattening layer on said photosensitive devices, a color filter layer on said first flattening layer and a second flattening layer on said color filter layer, wherein said first flattening layer and said second flattening layer are transparent for incident beam; forming a photoresist layer over said second flattening layer; transferring a plurality of phase grating pattern into said photoresist layer to expose said second flattening layer, wherein each said phase grating pattern comprises a plurality of concentric circle and corresponds to each respective underlying said photosensitive device; anisotropically etching said second flattening layer to a predetermined depth to form a plurality of phase grating lens; and removing said photoresist layer.