Patent ID: 6040591
Filing Date: 2000-03-21
Classification: H01L

Abstract:
A solid-state imaging device comprising:a semiconductor substrate including at least one photosensor formed therein;a first transparent flattening layer on the substrate and including formed therein transfer electrodes for the photosensor;a color filter layer on the first transparent flattening layer;a second transparent flattening layer on the color filter layer;a microlens on the second the second transparent flattening layer in registry with the photosensor;a refractive index adjusting layer formed over the microlens and the second transparent flattening layer, the refractive adjusting layer having a refractive index n2 that is lower than refractive index n1 of the microlens,wherein,a focal length f of the microlens as adjusted by the refractive index adjusting layer extends into the first transparent flattening layer and is expressed by the relationship f=(n2)r/(n2-n1), where r is a radius of lens curvature of the microlens, and a top surface of the device is flat.