Composition for color filter, infrared transmission filter and production method thereof, and infrared sensor

Patent metadata

Field	Value
Publication number	US-10436959-B2
Application number	US-201815917063-A
Country	US
Kind code	B2
Filing date	Mar 9, 2018
Priority date	Dec 27, 2012
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

By a composition for color filter containing a near-infrared transmitting black coloring agent, a composition for color filter capable of forming an infrared transmission filter which is able to transmit an infrared ray (particularly, a near infrared ray) in the state of low noise derived from the visible light component even when it has a very thin thickness (for example, thickness of 0.5 μm), and an infrared transmission filter and a production method of an infrared transmission filter using the same, and an infrared sensor can be provided.

First claim

The invention claimed is:

1. A composition for infrared transmission filter containing a near-infrared transmitting black coloring agent,
wherein the near-infrared transmitting black coloring agent is a near-infrared transmitting black coloring agent consisting of a bisbenzofuranone-based pigment,
the content of the near-infrared transmitting black coloring agent is from 20 to 80% by mass, based on the total solids content of the composition for infrared transmission filter,
the composition for infrared transmission filter further contains a coloring agent which is different from the near-infrared transmitting black coloring agent,
the coloring agent is one or more selected from an organic pigment, and
the content of the coloring agent is from 1 to 30% by mass, based on the total solids content of the composition for infrared transmission filter.

2. The composition for infrared transmission filter as claimed in claim 1 ,
wherein the content of the near-infrared transmitting black coloring agent is from 40 to 80% by mass, based on the total solids content of the composition for infrared transmission filter.

3. The composition for infrared transmission filter as claimed in claim 1 ,
wherein the average particle size of the near-infrared transmitting black pigment is 50 nm or less.

4. The composition for infrared transmission filter as claimed in claim 1 ,
wherein the coloring agent is a yellow pigment.

5. The composition for infrared transmission filter as claimed in claim 4 ,
wherein the yellow pigment is C. I. Pigment Yellow 139.

6. The composition for infrared transmission filter as claimed in claim 1 ,
wherein the coloring agent contains two kinds of the organic pigments.

7. The composition for infrared transmission filter as claimed in claim 1 , which further contains a polymer dispersant, and the polymer dispersant is one or more selected from the group consisting of a resin having an acid value of 60 mgKOH/g or more, a resin containing an amine group and an oligoimine-based resin.

8. The composition for infrared transmission filter as claimed in claim 1 , which further contains a polymerizable compound.

9. The composition for infrared transmission filter as claimed in claim 8 ,
wherein the polymerizable compound is one or more selected from the group consisting of radical polymerizable monomers represented by formulae (MO-1) to (MO-5):

in the formulae above,
n is from 0 to 14 and m is from 1 to 8, when plural Rs or plural Ts are present in one molecule, plural Rs or plural Ts may be the same or different from each other,
when T is an oxyalkylene group, the terminal on the carbon atom side thereof is connected to R,
in each of the polymerizable compounds represented by formulae (MO-1) to (MO-5), at least one of plural Rs represents a group represented by —OC(═O)CH═CH 2 or —OC(═O)C(CH 3 )═CH 2 .

10. The composition for infrared transmission filter as claimed in claim 8 ,
wherein the content of the polymerizable compound is from 2 to 25% by mass, based on the total solids content of the composition for infrared transmission filter.

11. The composition for infrared transmission filter as claimed in claim 1 , which further contains a photopolymerization initiator.

12. The composition for infrared transmission filter as claimed in claim 1 , which further contains an alkali-soluble resin.

13. The composition for infrared transmission filter as claimed in claim 12 ,
wherein the content of the alkali-soluble resin is from 1 to 15% by mass, based on the total solids content of the composition for infrared transmission filter.

14. The composition for infrared transmission filter as claimed in claim 13 ,
wherein the content of the alkali-soluble resin is from 3 to 10% by mass, based on the total solids content of the composition for infrared transmission filter.

15. The composition for infrared transmission filter as claimed in claim 1 , which further contains a surfactant.

16. The composition for infrared transmission filter as claimed in claim 15 ,
wherein the surfactant is a fluorine-based surfactant.

17. The composition for infrared transmission filter as claimed in claim 1 ,
wherein when a film having a film thickness of 0.5 μm is formed, the standard deviation of the light transmittance in the film thickness direction in a wavelength range from 400 to 630 nm is 6.0 or less.

18. The composition for infrared transmission filter as claimed in claim 1 ,
wherein when a film having a film thickness of 0.5 μm is formed, the maximum value of the light transmittance in the film thickness direction in a wavelength range from 400 to 650 nm is 20% or less and the minimum value of the light transmittance in the film thickness direction in a wavelength range from 800 to 1,300 nm is 80% or more.

19. An infrared transmission filter formed from the composition for infrared transmission filter as claimed in claim 1 .

20. A production method of infrared transmission filter comprising:
a step of providing the composition for infrared transmission filter as claimed in claim 1 on a substrate to form an infrared transmission composition layer,
a step of exposing patternwise the infrared transmission composition layer, and
a step of developing the exposed infrared transmission composition layer to form a pattern.

21. An infrared sensor comprising the infrared transmission filter as claimed in claim 19 .

Assignees

• Fujifilm Corp

Inventors

• TAKISHITA Hirotaka
• Taguchi Yoshinori
• Taguchi Hiroshi

Classifications

• G03F7/105

  having substances, e.g. indicators, for forming visible images · CPC title

• G02B5/208 Primary

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• G03F7/0007 Primary

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title