Image pickup apparatus, image pickup system, and method for manufacturing image pickup apparatus

Patent metadata

Field	Value
Publication number	US-9825086-B2
Application number	US-201514810285-A
Country	US
Kind code	B2
Filing date	Jul 27, 2015
Priority date	Jul 31, 2014
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

An image pickup apparatus includes a first pixel electrode connected to a pixel circuit, a second pixel electrode adjoining the first pixel electrode and connected to the pixel circuit, a photoelectric conversion film continuously covering the first and second pixel electrodes, and an opposite electrode facing the first and second pixel electrodes via the film. The film includes a recessed portion recessed toward a portion between the first and second pixel electrodes on a surface opposite to the first and second pixel electrodes. The depth of the recessed portion is greater than the first pixel electrode's thickness, and a distance from the first pixel electrode to the recessed portion is greater than a distance from the first pixel electrode to the second pixel electrode. The opposite electrode is provided continuously along the surface via the film, and the recessed portion surrounds a part of the opposite electrode.

First claim

What is claimed is:

1. An image pickup apparatus, comprising:
a first pixel electrode;
a second pixel electrode adjoining to the first pixel electrode; and
a photoelectric conversion film configured to continuously cover the first pixel electrode and the second pixel electrode;
an opposite electrode facing the first pixel electrode and the second pixel electrode via the photoelectric conversion film,

wherein
the photoelectric conversion film includes a recessed portion recessed toward a portion between the first pixel electrode and the second pixel electrode on a surface opposite to the first pixel electrode and the second pixel electrode,
the depth of the recessed portion is greater than a thickness of the first pixel electrode, and the shortest distance from the first pixel electrode to the recessed portion is greater than the shortest distance from the first pixel electrode to the second pixel electrode, and
the opposite electrode is provided continuously along the surface via the photoelectric conversion film, and a part of the opposite electrode is surrounded by the recessed portion.

2. The image pickup apparatus according to claim 1 , wherein a width of the recessed portion is greater than the shortest distance from the first pixel electrode to the second pixel electrode.

3. The image pickup apparatus according to claim 1 , wherein the opposite electrode is formed by a transparent conductive material.

4. The image pickup apparatus according to claim 1 , wherein the opposite electrode are in contact with the recessed portion.

5. The image pickup apparatus according to claim 1 , wherein the depth of the recessed portion, the shortest distance from the first pixel electrode to the recessed portion, and the shortest distance from the first pixel electrode to the second pixel electrode are less than 0.5 μm.

6. The image pickup apparatus according to claim 1 , wherein a dielectric film having a refractive index lower than that of the photoelectric conversion film are provided continuously along the surface so as to face the first pixel electrode and the second pixel electrode via the photoelectric conversion film, and a part of the dielectric films is surrounded by the recessed portion.

7. The image pickup apparatus according to claim 1 , wherein an insulating film is provided between the first pixel electrode and the photoelectric conversion film.

8. The image pickup apparatus according to claim 1 , wherein a thickness of the first pixel electrode is smaller than the shortest distance from the first pixel electrode to the second pixel electrode.

9. The image pickup apparatus according to claim 1 , wherein the first pixel electrode and the second pixel electrode are disposed on a common insulating member, and a surface of the insulating member on the side of the first pixel electrode and the second pixel electrode includes a groove recessed to separate from a portion between the first pixel electrode and the second pixel electrode.

10. The image pickup apparatus according to claim 1 , wherein the photoelectric conversion film is a quantum dot film.

11. An image pickup system, comprising:
the image pickup apparatus; and
a signal processing apparatus configured to process a signal obtained from the image pickup apparatus
wherein the image pickup apparatus, comprising:
a first pixel electrode;
a second pixel electrode adjoining to the first pixel electrode; and
a photoelectric conversion film configured to continuously cover the first pixel electrode and the second pixel electrode;
an opposite electrode facing the first pixel electrode and the second pixel electrode via the photoelectric conversion film,

wherein
the photoelectric conversion film includes a recessed portion recessed toward a portion between the first pixel electrode and the second pixel electrode on a surface opposite to the first pixel electrode and the second pixel electrode,
the depth of the recessed portion is greater than a thickness of the first pixel electrode, and the shortest distance from the first pixel electrode to the recessed portion is greater than the shortest distance from the first pixel electrode to the second pixel electrode, and
the opposite electrode is provided continuously along the surface via the photoelectric conversion film, and a part of the opposite electrode is surrounded by the recessed portion.

Assignees

• Canon Kk

Inventors

• Kawahara Yuki
• Kobayashi Hiroaki

Classifications

• H01L27/14621

  Electricity · mapped topic

• H01L27/14665

  Electricity · mapped topic

• H01L27/14636

  Electricity · mapped topic

• H01L27/14689 Primary

  Electricity · mapped topic

• H01L27/307

  Electricity · mapped topic