초록 ▼

A microlens array for use in a solid-state imager having an improved fill factor. The microlens array includes a plurality of microlenses, each consisting of two layers: a lower refractive layer, and an upper insulation layer. The refractive layer is formed of transparent material with a suitable re

A microlens array for use in a solid-state imager having an improved fill factor. The microlens array includes a plurality of microlenses, each consisting of two layers: a lower refractive layer, and an upper insulation layer. The refractive layer is formed of transparent material with a suitable refractive index which may be optical thermoplastic, polyimide, thermoset resin, photosensitive gelatin, or radiation curable resin. The insulation layer is formed of transparent insulating material such as silicon oxide, silicon nitride, or silicon oxynitride. Due to the refraction of light through the insulation layer, more light at the pixel edges is captured by each microlens, thereby improving the fill factor of the microlens array. Also disclosed are methods for forming the microlens array.

대표청구항 ▼

[ What is claimed as new and desired to be protected by Letters Patent of the United States is:] [1.]1. A microlens array for use in an imaging device comprising:an imaging array containing photosensitive elements;a light condensing layer provided on said imaging array, said light condensing layer h

[ What is claimed as new and desired to be protected by Letters Patent of the United States is:] [1.]1. A microlens array for use in an imaging device comprising:an imaging array containing photosensitive elements;a light condensing layer provided on said imaging array, said light condensing layer having a plurality of microlenses each corresponding to one or more pixels of said array, and wherein said microlenses have convex surfaces facing away from said imaging array; anda transparent insulation layer for increasing the proportion of radiation incident on said photosensitive elements of said imaging array, said transparent insulation layer being formed on said light condensing layer by a low temperature process, and wherein said transparent insulation layer has convex surfaces facing away from said microlenses, and wherein said transparent insulation layer includes silicon insulator material.