Patent ID: 7608866
Filing Date: 2009-10-27
Classification: H01L

Abstract:
1. A solid-state image sensor comprising: a plurality of first photodiodes and a plurality of second photodiodes of sensitivity lower than said first photodiodes which are disposed in a virtual plane for receiving light incident from a field of view to be captured; a plurality of first micro-lenses each being provided over particular one of said first photodiodes for collecting the light incident on said particular first photodiode; a plurality of second micro-lenses each being provided over particular one of said second photodiodes for collecting the light incident on said particular second photodiode, at least one of said second micro-lenses having a curvature smaller than that of said first micro-lenses; and an optical shielding film having first openings located above said first photodiodes and second openings located above said second photodiodes associated with said second micro-lenses, one of said second openings being smaller than one of said first openings and said smaller curvature second micro-lens being located over said smaller second opening; a plurality of first in-layer lenses each being provided between one of said first openings and corresponding one of said first micro-lenses for further collecting the light collected by said first micro-lens on said first photodiode; and a plurality of second in-layer lenses each being provided between corresponding one of said second openings and corresponding one of said second micro-lenses for further collecting the light collected by said second micro-lens on said second photodiode, at least one of said second in-layer lenses having a curvature smaller than the curvature of one of said first in-layer lenses, wherein said curvature of said second micro-lens is smaller by an amount determined based on a size of said second opening.