Near infrared absorbing composition, near infrared cut filter, solid state image sensor, and camera module

Patent metadata

Field	Value
Publication number	US-12024632-B2
Application number	US-202117469052-A
Country	US
Kind code	B2
Filing date	Sep 8, 2021
Priority date	Sep 25, 2020
Publication date	Jul 2, 2024
Grant date	Jul 2, 2024

Abstract

A near infrared absorbing composition includes a near infrared absorber. The near infrared absorber contains at least one of Ingredient (A) and Ingredient (B). Ingredient (A) consists of a first compound having a first structure represented by General Formula (I), a second compound having a second structure represented by General Formula (II), and a copper ion. Ingredient (B) consists of a first copper complex in which the first compound is coordinated and a second copper complex in which the second compound is coordinated. In General Formula (I), R 1 represents an alkyl group containing 1-20 carbons or an aryl group containing 6-20 carbons, and may further have a substituent. In General Formula (II), R 2 represents an alkyl group containing 1-20 carbons or an aryl group containing 6-20 carbons, and may further have a substituent.

First claim

What is claimed is:

1. A near infrared absorbing composition comprising:
a near infrared absorber that contains at least one of:
Ingredient (A) that consists of a first compound having a first structure represented by General Formula (I), a second compound having a second structure represented by General Formula (II), and a copper ion; and

Ingredient (B) that consists of a first copper complex in which the first compound is coordinated and a second copper complex in which the second compound is coordinated,

wherein
in General Formula (I), R 1 represents an alkyl group containing 1-20 carbons or an aryl group containing 6-20 carbons, and may further have a substituent,
in General Formula (II), R 2 represents an alkyl group containing 1-20 carbons or an aryl group containing 6-20 carbons, and may further have a substituent,
each of R 21 to R 24 represents a hydrogen atom or an alkyl group containing 1-4 carbons,
“l” represents an average number of added partial structures in which R 21 to R 24 are all hydrogen atoms, and is in a range of 1-19,
“m” represents an average number of added partial structures in which at least one of R 21 to R 24 is an alkyl group containing 1-4 carbons, and is in the range of 1-19,
“l+m” is a sum of “l” and “m”, and is in a range of 2-20,
“Z” represents a structural unit selected from General Formulae (Z-1) to (Z-3),

“*” represents a binding site and is combined with “O” in General Formula (II),
a molar ratio CA/CE is in a range of 3.8-10, wherein
CA is a molar content of the first compound, and
CE is a molar content of the second compound, and

a molar ratio CH/CC is in a range of 1.5-2.5, wherein
CC is a molar content of copper ions, and
CH is a molar content of reactive hydroxy groups contained in the first compound and the second compound.

2. The near infrared absorbing composition according to claim 1 , wherein R 1 in General Formula (I) is an alkyl group containing 1-20 carbons.

3. The near infrared absorbing composition according to claim 1 , further comprising:
an organic dye.

4. The near infrared absorbing composition according to claim 3 , wherein the organic dye is a quaterylene derivative, a phthalocyanine derivative, a cyanine derivative, or a squarylium derivative.

5. The near infrared absorbing composition according to claim 1 , further comprising:
a curable resin,
wherein the near infrared absorbing composition is in a state of a cured film.

6. The near infrared absorbing composition according to claim 5 , wherein
an average spectral transmittance is 80% or more in a wavelength range of 450-600 nm,
an average spectral transmittance is 10% or less in a wavelength range of 850-1000 nm, and

a film thickness is in a range of 10-150 μm.

7. The near infrared absorbing composition according to claim 6 , wherein
an average spectral transmittance is 1% or less in a wavelength range of 750-1080 nm,
a spectral transmittance decreases as a wavelength increases in a wavelength range of 600-700 nm,
a cutoff wavelength for light incident on a surface at an incident angle of 0° is in a range of 600-680 nm, the cutoff wavelength being a wavelength in which a spectral transmittance is 50% in the wavelength range of 600-700 nm, and
a film thickness is in a range of 10-100 μm.

8. A near infrared cut filter, comprising:
a transparent dielectric substrate; and
a near infrared absorbing layer which contains the near infrared absorbing composition according to claim 1 and which is on at least one side of the transparent dielectric substrate.

9. The near infrared cut filter according to claim 8 , further comprising:
a dielectric multilayer film on at least one side of the transparent dielectric substrate.

10. A solid state image sensor, comprising:
the near infrared cut filter according to claim 8 .

11. A camera module, comprising:
the solid state image sensor according to claim 10 .

12. The near infrared absorbing composition according to claim 1 , wherein, in General Formula (I), R 1 represents the alkyl group containing 1-20 carbons and may further have the substituent.

Assignees

• Konica Minolta Inc

Inventors

• Kiriishi Natsumi
• Daifuku Koji
• Suzuki Takayuki
• Fukusaka Kiyoshi

Classifications

• H10F39/12

  Image sensors · CPC title

• H10F39/805

  Coatings · CPC title

• H10F39/809

  of hybrid image sensors · CPC title

• H10F39/806

  Optical elements or arrangements associated with the image sensors · CPC title

• H10F39/804

  Containers or encapsulations · CPC title