IMAGE SENSOR AND ELECTRONIC DEVICE INCLUDING THE SAME

摘要

Disclosed are an image sensor including a light collection member having a multi-layer step shape and an electronic device including the same. This technology can improve light condensing efficiency in a unit pixel since a corresponding pixel lens is included. Furthermore, light condensing efficiency in a unit pixel can be improved more effectively by controlling the width of a corresponding pixel lens so that the pixel lens corresponds to the wavelength of incident light whose color has been separated by a corresponding color filter. As described above, quantum efficiency in the photoelectric conversion element can also be improved since light condensing efficiency in a unit pixel is improved. As a result, performance of the image sensor can be improved.

主权项

1. An image sensor, comprising:
first and second photoelectric conversion elements formed in a first pixel and a second pixel of a substrate, respectively; a first pixel lens formed over the first photoelectric conversion element of the first pixel and comprising a first lower light condensing layer and a first upper light condensing layer, wherein the first upper light condensing layer has a smaller width than the first lower light condensing layer and is formed over the first lower light condensing layer; a first color filter covering the first pixel lens and filtering a visible ray of a first wavelength band;a second pixel lens formed over the second photoelectric conversion element of the second pixel and comprising a second lower light condensing layer and a second upper light condensing layer, wherein the second upper light condensing layer has a smaller width than the second lower light condensing layer and is formed over the second lower light condensing layer, wherein the second pixel lens has a width different from a width of the first pixel lens; and
a second color filter covering the second pixel lens and filtering a visible ray of a second wavelength band longer than the first wavelength band.