Substrate for display, color filter using the same and method for the production thereof, organic el element and method for the production thereof, and flexible organic el display (as amended)

Patent metadata

Field	Value
Publication number	US-2017309844-A1
Application number	US-201515515729-A
Country	US
Kind code	A1
Filing date	Sep 25, 2015
Priority date	Sep 30, 2014
Publication date	Oct 26, 2017
Grant date	—

Abstract

The present invention is a substrate for a display, the substrate having a film B including a polysiloxane resin on at least one surface of a film A including a polyimide resin, wherein the film B contains inorganic oxide particles therein, and the present invention has an object to provide a substrate for a display: being able to be applied to a color filter, an organic EL element, or the like without the need to carry out any complex operations; allowing high-definition displays to be manufactured; and being provided with a low CTE, a low birefringence, and flexibility.

First claim

1 . A substrate for a display, the substrate having a film B comprising a polysiloxane resin on at least one surface of a film A comprising a polyimide resin, wherein the film B contains inorganic oxide particles therein.

2 . The substrate for a display according to claim 1 , wherein the thickness ratio of the film A to the film B, film A/film B, is from 25/1 to 1.5/1.

3 . The substrate for a display according to claim 1 , wherein the coefficient of thermal expansion of the substrate for a display is 40 ppm/° C. or less.

4 . The substrate for a display according to claim 1 , wherein (ΔN A −ΔN B )≦0.065 where the birefringence of the film A is denoted by ΔN A and the birefringence of the film B is denoted by ΔN B .

5 . The substrate for a display according to claim 1 , wherein the content of the inorganic oxide particles in the film B is 20 to 80% by weight.

6 . The substrate for a display according to claim 1 , wherein the inorganic oxide particles are silicon dioxide.

7 . The substrate for a display according to claim 1 , wherein the substrate is transparent.

8 . The substrate for a display according to claim 1 , wherein the thickness of the film A is 5.0 μm to 20 μm and the thickness of the film B is 0.2 μm to 3.0 μm.

9 . The substrate for a display according to claim 1 , wherein the polyimide resin has at least one group selected from among a trifluoromethyl group and alicyclic hydrocarbon groups.

10 . The substrate for a display according to claim 1 , wherein diamine residues having at least one group selected from among a trifluoromethyl group and alicyclic hydrocarbon groups are contained in an amount of 50 mol % or more relative to the total amount of all diamine residues contained in the polyimide resin.

11 . The substrate for a display according to claim 1 , wherein the polyimide resin is a polyimide comprising at least one of repeating structural units represented by general formulae (1) to (3) as a main component,

in formulae (1) to (3), R 1 is at least one or more groups represented by (4) to (9).

12 . The substrate for a display according to claim 1 , wherein the polyimide resin is a polyimide comprising repeating structural units represented by general formula (10) as a main component,

in general formula (10), R 1 is at least one or more groups represented by (4) to (9).

13 . The substrate for a display according to claim 1 , wherein the temperature of 3% weight loss of the film B is 300° C. or more.

14 . The substrate for a display according to claim 1 , wherein transmitted chromaticity coordinates in the XYZ color system chromaticity diagram of the film B are within the ranges of 0.300≦x≦0.325 and 0.305≦y≦0.325.

15 . A color filter having a black matrix and a colored pixel on or over the film B of the substrate for a display according to claim 1 .

16 . The color filter according to claim 15 which has a substrate on the film A side of the color filter.

17 . A method for producing a color filter, comprising at least the following steps (1) to (6):
(1) a step of coating a resin solution containing a polyimide precursor resin onto a substrate to obtain a coated film A′; (2) a step of coating a polysiloxane resin composition onto the film A′ to obtain a film B′; (3) a step of heating the film A′ and the film B′ individually to obtain a resin stack; (4) a step of forming a black matrix on the resin stack; (5) a step of forming a colored pixel on the resin stack; and (6) a step of peeling the resin stack from the substrate.

18 . The method for producing a color filter according to claim 17 , wherein the resin composition for obtaining the film B′ is a photosensitive resin composition and the method further comprises a step of exposing and developing the film B′ after the step of obtaining the film B′.

19 . An organic EL element having an organic EL element on or over the film B of the substrate for a display according to claim 1 .

20 . The organic EL element according to claim 19 which has a substrate on the film A side of the organic EL element.

21 . A method for producing an organic EL element, comprising at least the following steps (1) to (5):
(1) a step of coating a resin solution containing a polyimide precursor resin onto a substrate to obtain a coated film A′; (2) a step of coating a polysiloxane resin composition onto the film A′ to obtain a film B′; (3) a step of heating the film A′ and the film B′ individually to obtain a resin stack; (4) a step of forming an organic EL element on the resin stack; and (5) a step of peeling the resin stack from the substrate.

22 . The method for producing an organic EL element according to claim 21 , wherein the resin composition for obtaining the film B′ is a photosensitive resin composition and the method further comprises a step of exposing and developing the film B′ after the step of obtaining the film B′.

23 . A flexible organic EL display comprising a color filter according to claim 15 and/or an organic EL element according to claim 19 .

Assignees

• Toray Industries

Inventors

• Saeki Akinori
• Wakita Junji
• Nonaka Harushi
• Matoba Yoshinori
• Nishiyama Masahito

Classifications

• G03F7/033

  the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title

• C08G77/14

  containing silicon bound to oxygen-containing groups · CPC title

• B32B27/34

  comprising polyamides · CPC title

• B05D1/005

  Spin coating · CPC title

• C08F283/124

  on to polysiloxanes having carbon-to-carbon double bonds · CPC title