PHOTOELECTRIC CONVERSION ELEMENT, AND PHOTOELECTRIC CONVERSION APPARATUS AND IMAGE SENSING SYSTEM

摘要

A member for light path to a photoelectric conversion portion includes a middle portion, and a peripheral portion having a refractive index different from the refractive index of the middle portion, and within some plane in parallel with the light receiving surface of a photoelectric conversion portion, and within other plane closer to the light receiving surface than the some plane in parallel with the light receiving surface, the peripheral portion is continuous with the middle portion and surrounds the middle portion, and also the refractive index of the peripheral portion is higher than the refractive index of an insulator film, and the thickness of the peripheral portion within the other plane is smaller than the thickness of the peripheral portion within the some plane.

主权项

1. A photoelectric conversion element comprising:
a photoelectric conversion portion; and a member for light path to said photoelectric conversion portion, which is provided onto said photoelectric conversion portion and surrounded with an insulator film; wherein said member includes
a first portion, anda second portion having a same stoichiometric composition as said first portion, and having a higher refractive index than a refractive index of said first portion; and wherein said second portion is continuous with said first portion and surrounds said first portion, and the refractive index of said first portion is higher than a refractive index of said insulator film, within some plane in parallel with a light receiving surface of said photoelectric conversion portion, and within other plane in parallel with said light receiving surface and closer to said light receiving surface than said some plane; and wherein a thickness of said second portion within said other plane is smaller than a thickness of said second portion within said some plane.