Solid-state imaging element and imaging device

Abstract

In the solid-state imaging device of the present invention, the light-condensing element (11) of the unit pixel (3) has a line width separated by the wavelength of light incident on the light-receiving element (14) of the unit pixel (3), so as to Multiple light-transmitting films (33) with a concentric structure centered on the axis vertical to the light-receiving surface of the light-collecting element (11), and have an effective refractive index distribution controlled by the combination of multiple light-transmitting films (33) , the shape of the outer edges of the multiple light-transmitting films (33) of the concentric structure is on the light-receiving surface, the light-transmitting films (33) closest to the center of the concentric structure form a perfect circle, and the light-transmitting films (33) far away from the center of the concentric structure The membrane (33) is elliptical, and the ratio of the major axis to the minor axis of the ellipse is, the farther away from the center of the concentric structure, the higher the shape ratio of the outer edge of the light-transmitting membrane (33), and the multiple unit pixels ( 3) The major axis direction of each ellipse is perpendicular to the vector connecting the center of each concentric structure of the plurality of unit pixels and the center of the solid-state imaging element on the light receiving surface.

Description

technical field [0001] The present invention relates to a solid-state imaging element used in a digital camera and the like, and more particularly to a solid-state imaging element used in a single-lens reflex digital camera with an interchangeable lens. Background technique [0002] In recent years, with the spread of digital cameras and mobile phones with camera functions, the market for solid-state imaging devices has also expanded significantly. In addition, digital single-lens reflex cameras that can be replaced with various optical lenses such as wide-angle and telephoto lenses are also widespread. In such a trend, there is still a strong demand for thinner digital cameras and the like. In other words, it means that the lens used in the camera part has a short focal length, and the range of light entering the solid-state imaging device has a wide angle (a large angle measured from the vertical axis of the incident surface of the solid-state imaging device). [0003] I...

AI Technical Summary

Problems solved by technology

[0010] However, when the incident angle of the light from the optical lens is changed by changing the lens, the light may deviate from the light receiving element

For example, if the shrinkage of the wiring and the light receiving element or the offset of the center of the light transmission film of the concentric structure is designed to correspond to light with a small incident angle when a long focal length lens is installed, if a wide-angle If the lens is used, light with a large incident angle will enter from the optical lens, so part of the incident light will deviate from the light receiving element, resulting in a decrease in sensitivity

Relatively speaking, if a design with contraction or increased offset is adopted in order to correspond to a larger angle of incident light, on the contrary, when the lens is replaced with a long focal length lens, light with a small incident angle will be incident, which will still lead to Reduced sensitivity

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