Patent ID: 7829965
Filing Date: 2010-11-09
Classification: H01L

Abstract:
1. A method for fabricating a microlens structure in a pixel sensor array comprising the steps of: a. providing a substrate including a plurality of light sensitive elements adapted to receive light incident to a respective pixel microlens; b. forming a photoresist material layer over said substrate; c. patterning said photoresist layer using a first sub-resolution condition to form microlens structure images, said first sub-resolution condition applied in a manner sufficient to form partially connected lens portions at gaps between adjacent microlens structures; d. developing said photoresist layer to partially form the patterned microlens structures having partially connected lens portions at said gaps; e. blanket applying a second sub-resolution condition to the partially formed microlens structures; and, f. flowing said partially formed microlens structures, wherein each microlens structure is webbed such that said microlens structure touches a microlens structure of an adjacent pixel in said array, and such that a curvature of said microlens structure is uniform in all directions to thereby maximize collection of light incident to the microlens structure from all directions.