Film, film forming method, optical filter, laminate, solid image pickup element, image display device, and infrared sensor

Patent metadata

Field	Value
Publication number	US-11118059-B2
Application number	US-201816052051-A
Country	US
Kind code	B2
Filing date	Aug 1, 2018
Priority date	Feb 3, 2016
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

Provided are a film having excellent heat resistance and a film forming method. In addition, provided are an optical filter, a laminate, a solid image pickup element, an image display device, and an infrared sensor. The film includes an aggregate of a dye and a resin, in which an average particle size of the aggregate of the dye is 30 to 450 nm.

First claim

What is claimed is:

1. A film comprising:
an aggregate of a dye;
a coloring material that allows transmission of at least a part of light in an infrared range and shields light in a visible range; and
a resin,
wherein the aggregate of the dye has an average particle size of 30 to 450 nm, and
the coloring material is a material that shields light in a wavelength range of 450 to 650 nm.

2. The film according to claim 1 ,
wherein the resin has a glass transition temperature of 0° C. to 100° C.

3. The film according to claim 1 ,
wherein the resin has a weight-average molecular weight of 20000 to 60000.

4. The film according to claim 1 ,
wherein the dye is a compound having an absorption maximum in a wavelength range of 650 to 1000 nm.

5. The film according to claim 1 ,
wherein the dye is at least one selected from the group consisting of a pyrrolopyrrole dye, a cyanine dye, and a squarylium dye.

6. A laminate comprising:
an infrared cut filter that includes the film according to claim 1 ; and
a color filter that includes a chromatic colorant.

7. A solid image pickup element comprising:
the film according to claim 1 .

8. An image display device comprising:
the film according to claim 1 .

9. An infrared sensor comprising:
the film according to claim 1 .

10. The film according to claim 1 , wherein the average particle size of the aggregate of the dye is 50 to 450 nm.

11. The film according to claim 1 , wherein a content of a pigment in the coloring material is 90 mass % or higher with respect to the total mass of the coloring material.

12. The film according to claim 1 , wherein the coloring material is a material in which a ratio A/B of a minimum value A of an absorbance in a wavelength range of 450 to 650 nm to a minimum value B of an absorbance in a wavelength range of 900 to 1300 nm is 4.5 or higher.

13. The film according to claim 1 , wherein the resin contains at least one constituent unit selected from a unit represented by formulae (A 2-1) to (A 2-4):

wherein R 1 represents a hydrogen atom or an alkyl group;
L 51 represents a single bond or a divalent linking group;
P 1 represents a vinyl group, a (meth)allyl group, a (meth)acryloyl group, or a (meth)acryloyloxy group.

14. The film according to claim 1 , wherein the dye has a solubility of 1 mass % or higher in at least one solvent selected from the group consisting of cyclopentanone, cyclohexanone, and propylene glycol monomethyl ether acetate at 23° C.

15. The film according to claim 1 , wherein the dye is a pyrrolopyrrole dye.

16. The film according to claim 1 , wherein the average particle size of the aggregate of the dye is 75 to 450 nm.

17. A film forming method for forming a film comprising an aggregate of a dye that has an average particle size of 30 to 450 nm and a resin, the film forming method comprising:
applying a composition including a dye, a resin, and a solvent to a support to form a composition layer on the support; and
causing the dye included in the composition layer to aggregate;
wherein the causing the dye included in the composition layer to aggregate is performed by heating the composition layer at a temperature that is higher than the glass transition temperature of the resin by 20° C. to 80° C.

18. The film forming method according to claim 17 ,
wherein the resin includes a resin having a polymerizable group and the composition further includes a photopolymerization initiator; or
the composition includes a polymerizable compound other than the resin and a photopolymerization initiator, and
the film forming method further comprises exposing the composition layer after the causing the dye included in the composition layer to aggregate.

19. The film forming method according to claim 18 ,
wherein the composition includes the polymerizable compound, and
a mass ratio resin/polymerizable compound of the resin to the polymerizable compound is 3 to 10.

20. The film forming method according to claim 17 , further comprising:
forming a pattern.

21. The film forming method according to claim 17 , wherein the dye has a solubility of 1 mass % or higher in at least one solvent selected from the group consisting of cyclopentanone, cyclohexanone, and propylene glycol monomethyl ether acetate at 23° C.

22. The film forming method according to claim 17 , wherein the dye is a pyrrolopyrrole dye.

23. The film forming method according to claim 17 , wherein the average particle size of the aggregate of the dye is 75 to 450 nm.

24. An optical filter comprising:
a pixel selected from the group consisting of a red pixel, a green pixel, a blue pixel, a magenta pixel, a yellow pixel, a cyan pixel, a black pixel, and an achromatic pixel; and
a pixel that includes a film comprising an aggregate of a dye and a resin,
wherein the aggregate of the dye has an average particle size of 30 to 450 nm, and
the dye is at least one selected from the group consisting of a pyrrolopyrrole dye, a cyanine dye, and a squarylium dye.

25. The optical filter according to claim 24 ,
wherein the optical filter is a color filter, an infrared cut filter, or an infrared transmitting filter.

26. The optical filter according to claim 24 , further comprising:
an antireflection film.

27. The optical filter according to claim 24 , wherein the dye has a solubility of 1 mass % or higher in at least one solvent selected from the group consisting of cyclopentanone, cyclohexanone, and propylene glycol monomethyl ether acetate at 23° C.

28. The optical filter according to claim 24 , wherein the dye is a pyrrolopyrrole dye.

29. The optical filter according to claim 24 , wherein the average particle size of the aggregate of the dye is 75 to 450 nm.

Assignees

• Fujifilm Corp

Inventors

• Oota Kazuya
• Arayama Kyohei
• Sasaki Daisuke
• Matsumura Tokihiko
• Kitajima Shunsuke

Classifications

• C09B57/00 Primary

  Other synthetic dyes of known constitution · CPC title

• C09B23/00

  Methine or polymethine dyes, e.g. cyanine dyes · CPC title

• G03F7/038

  Macromolecular compounds which are rendered insoluble or differentially wettable (G03F7/075 takes precedence; macromolecular azides G03F7/012; macromolecular diazonium compounds G03F7/021) · CPC title

• G03F7/0007

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

• C09B23/0075

  the polymethine chain being part of an heterocyclic ring · CPC title