Patent ID: 7875488

Claim:
A method of fabricating an image sensor, comprising: providing a substrate having first and second photoelectric conversion regions and a transistor region between the first and second photoelectric conversion regions; forming a first etch stop layer on the substrate; forming a first inner lens and a first etch stop layer pattern by patterning the first etch stop layer, the first inner lens being on the first photoelectric conversion region and having a convex upper surface; forming a first interconnection structure on the first inner lens and the first etch stop layer pattern; forming a second etch stop layer on the first interconnection structure; forming a second inner lens and a second etch stop layer pattern by patterning the second etch stop layer, the second inner lens being on the second photoelectric conversion region and having a convex upper surface; and forming a second interconnection structure on the second inner lens and the second etch stop layer pattern, wherein a radius of curvature of the first inner lens is different from a radius of curvature of the second inner lens.