Organic EL display device and method for manufacturing same
The purpose is to provide an organic EL display device which has good sensitivity and is free from the occurrence of luminance decrease or pixel shrinkage, thereby having excellent long-term reliability. In order to achieve the above-described purpose, provided is the following configuration. Namely, an organic EL display device wherein an insulating layer formed on a first electrode is a cured film obtained by curing a photosensitive resin composition; and the residual amount of acid anhydrides contained in the cured film is from 0.003 to 0.04 (inclusive) when the residual amount of aromatic rings contained in the cured film is taken as 1 (the reference value).
1. A method for manufacturing an organic EL display device, said method comprising:
emitting an actinic ray onto a photosensitive resin film through a mask having a pattern, and
a bleaching treatment that is included in an insulating layer formation step,
wherein the organic EL display device in which the insulating layer formed on a first electrode comprises a cured film produced by curing a photosensitive resin composition, wherein the below-shown index (a), which indicates the residual amount of acid anhydrides in the cured film, is 0.003 to 0.04 inclusive:
index ( a )=(intensity at 1853 cm −1 )/(intensity at 1436 cm −1 )
wherein each of the intensities represents an intensity of absorption measured with a Fourier transform infrared spectrometer (FT-IR),
wherein the photosensitive resin composition comprises (A) an alkali-soluble resin having a carboxylic acid structure, (B) a photosensitizing agent, and (C) an organic solvent,
wherein the photosensitizing agent (B) is (b1) an o-quinone diazide compound and has positive-type photosensitivity, and
wherein the bleaching treatment is carried out on a pattern on the photosensitive resin film.
2. The method for manufacturing the organic EL display device according to claim 1 , wherein the alkali-soluble resin having a carboxylic acid structure (A) is an alkali-soluble resin having an aromatic carboxylic acid structure.
3. The method for manufacturing the organic EL display device according to claim 1 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition is a polyimide precursor.
4. The method for manufacturing the organic EL display device according to claim 1 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition is a polyimide precursor having an amic acid structure.
5. The method for manufacturing the organic EL display device according to claim 1 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition has a structure represented by general formula (1):
wherein R 1 represents a tetravalent organic group containing an aromatic ring; R 2 represents a bivalent to tetravalent organic group containing an aromatic ring; X represents a carboxylic acid which is covalently bonded to an aromatic ring; Y represents a carboxylic acid ester which is covalently bonded to an aromatic ring; and l represents an integer of 1 to 2 and m represents an integer of 0 to 1, wherein l+m is 2.
6. The method for manufacturing the organic EL display device according to claim 1 , wherein the photosensitive resin composition contains (F) a coloring material.
7. The method for manufacturing the organic EL display device according to claim 1 , wherein an insulating layer opening ratio in a display area is 20% or less.
8. The method for manufacturing the organic EL display device according to claim 2 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition is a polyimide precursor.
9. The method for manufacturing the organic EL display device according to claim 2 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition is a polyimide precursor having an amic acid structure.
10. The method for manufacturing the organic EL display device according to claim 3 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition is a polyimide precursor having an amic acid structure.
11. The method for manufacturing the organic EL display device according to claim 2 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition has a structure represented by general formula (1):
wherein R 1 represents a tetravalent organic group containing an aromatic ring; R 2 represents a bivalent to tetravalent organic group containing an aromatic ring; X represents a carboxylic acid which is covalently bonded to an aromatic ring; Y represents a carboxylic acid ester which is covalently bonded to an aromatic ring; and l represents an integer of 1 to 2 and m represents an integer of 0 to 1, wherein l+m is 2.
12. The method for manufacturing the organic EL display device according to claim 3 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition has a structure represented by general formula (1):
wherein R 1 represents a tetravalent organic group containing an aromatic ring; R 2 represents a bivalent to tetravalent organic group containing an aromatic ring; X represents a carboxylic acid which is covalently bonded to an aromatic ring; Y represents a carboxylic acid ester which is covalently bonded to an aromatic ring; and l represents an integer of 1 to 2 and m represents an integer of 0 to 1, wherein l+m is 2.
13. The method for manufacturing the organic EL display device according to claim 4 , wherein the alkali-soluble resin having a carboxylic acid structure (A) contained in the photosensitive resin composition has a structure represented by general formula (1):
wherein R 1 represents a tetravalent organic group containing an aromatic ring; R 2 represents, a bivalent to tetravalent organic group containing an aromatic ring; X represents a carboxylic acid which is covalently bonded to an aromatic ring; Y represents a carboxylic acid ester which is covalently bonded to an aromatic ring; and l represents an integer of 1 to 2 and m represents an integer of 0 to 1, wherein l+m is 2.