US 8,525,282 B2Granted

Solid-state imaging device

AssigneeCanon Kabushiki Kaisha

InventorsAihiko Numata, Akinari Takagi

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Abstract

A solid-state imaging device capable of making reduction in reflection at the interface between a light guide and an incident unit consistent with improvement in condensing efficiency by the light guide is provided. The solid-state imaging device includes a substrate internally including a photoelectric conversion unit, and a condensing unit provided on an optical incident side of the substrate. A configuration satisfying relationships of |N1|<|√∈×√μ| and 0.63<N1/(√∈/√μ)<1.58 on an end face of the optical incident side of the condensing unit is adopted. Here, N1 is a refractive index of a medium forming a region of the optical incident side of the condensing unit, and ∈ is a specific permittivity of a medium forming the condensing unit, and μ is a specific permeability of the medium forming the condensing unit.

Claims10

Dependent claims

A solid-state imaging device, comprising:

a substrate internally including a photoelectric conversion unit;
and
a condensing unit, having a structure giving rise to magnetic resonance, provided on an optical incident side of the substrate,
wherein, the structure includes a plurality of metal structures separated in a direction perpendicular to a surface of the substrate, each of the metal structures has a one-dimensionally-extended structure in a direction parallel to the surface of the substrate, each of longitudinal directions of the one-dimensionally-extended structures extends in a same direction, and the one-dimensionally-extended structures are mutually covered along the longitudinal directions thereof, provided that a refractive index of a medium being a region of the optical incident side of the condensing unit is N1,
a specific permittivity of a medium forming the condensing unit is ∈, and
a specific permeability of the medium forming the condensing unit, controlled based on the structure, is μ,
relationships of |N1|<|√∈×√μ| and 0.63<N1/(√∈/√μ)<1.58 are satisfied on an end face of the optical incident side of the condensing unit.

4 more elements

Dependencies are inferred from the claim text.