Color filter imaging array and method of formation

Abstract

A color filter array pattern for use in a solid-state imager comprising red sensitive elements located at every other array position, with alternating blue sensitive and green sensitive elements located at the remaining array positions, is disclosed. Since red color is sampled most frequently, the color filter may be part of an in vivo camera system for imaging internal human body organs and tissues.

Description

technical field [0001] The present invention relates to a color filter for use in a solid-state image sensor, and in particular to a patterned color filter array that samples red more frequently than blue and green, and a method of forming it. Background technique [0002] Solid-state image sensors, also known as imagers, were developed in the late 1960s and early 1970s, mainly for television image acquisition, transmission and display. Imagers absorb incident radiation of a particular wavelength (such as photons, x-rays, etc.) and generate electrical signals corresponding to the absorbed radiation. There are many different types of semiconductor-based imagers, including charge coupled devices (CCDs), photodiode arrays, charge injection devices (CIDs), hybrid focal plane arrays, and CMOS imagers. Current applications for solid state imagers include cameras, scanners, machine vision systems, vehicle navigation systems, video telephony, computer input devices, surveillance sy...

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Problems solved by technology

However, if the object being imaged has relatively low spectral reflectance at wavelengths in the

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