# US 10,503,066 B2 · Photosensitive resin composition, black pixel defining layer using the same and display device

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- Number: US 10,503,066 B2
- Document ID: US10503066B2
- Status: Granted
- Kind: B2
- Application number: 15/459,328
- Filed: 2017-03-15
- Published: 2018-03-29
- Granted: 2019-12-10
- Earliest claimed: 2016-09-26
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Jiyun Kwon; Jinhee Kang; Heekyoung Kang; Chang-Hyun Kwon; Sang Soo Kim; Chanwoo Kim; Bumjin Lee; Junho Lee; Chungbeum Hong
- Web page: https://patentgrep.com/patent/US10503066B2

## CPC

- G03F 7/037: the binders being polyamides or polyimides
- C08G 73/1039: {comprising halogen-containing substituents}
- C08G 73/1042: {Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds}
- C08G 73/105: {with oxygen only in the diamino moiety}
- C08G 73/1064: {containing sulfur}
- C08G 73/1067: {Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound}
- C08G 73/1071: {Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain}
- C09D 179/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- G03F 7/0007: {Filters, e.g. additive colour filters; Components for display devices}
- G03F 7/029: Inorganic compounds; Onium compounds; Organic compounds having hetero atoms other than oxygen, nitrogen or sulfur
- G03F 7/031: Organic compounds not covered by group G03F7/029
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- G03F 7/095: having more than one photosensitive layer (G03F7/075 takes precedence)
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A photosensitive resin composition, a pixel defining layer, and a display device, the composition including a binder resin; a photopolymerizable monomer; a photopolymerization initiator including a first photopolymerization initiator and a second photopolymerization initiator; a black colorant; and a solvent, wherein the first photopolymerization initiator is represented by Chemical Formula 1, the second photopolymerization initiator has a different maximum absorption wavelength from the first photopolymerization initiator, and the first photopolymerization initiator and the second photopolymerization initiator are included in a weight ratio of about 3:7 to about 7:3,

## Claims

### Claim 1

A photosensitive resin composition for a black pixel defining layer, comprising:
about 1 wt % to about 15 wt % of a binder resin, the binder resin including a polyamic acid-polyimide copolymer that includes a polyamic acid repeating unit and a polyimide repeating unit in a mole ratio of the polyamic acid repeating unit to the polyimide repeating unit of about 5:5 to about 9:1;
about 1 wt % to about 15 wt % of a photopolymerizable monomer;
about 0.1 wt % to about 5 wt % of a photopolymerization initiator, the photopolymerization initiator including a first photopolymerization initiator and a second photopolymerization initiator;
about 1 wt % to about 15 wt % of a black colorant; and
about 50 wt % to about 90 wt % of a solvent,
wherein:
all wt % are based on a total weight of the photosensitive resin composition for a black pixel defining layer,
the first photopolymerization initiator is represented by Chemical Formula 1,
the second photopolymerization initiator is represented by one of Chemical Formula 2, Chemical Formula 3, Chemical Formula 4, or Chemical Formula 6, and
the first photopolymerization initiator and the second photopolymerization initiator are included in a weight ratio of about 3:7 to about 7:3,
wherein, in Chemical Formula 1,
R1 and R2 are each independently a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, or a substituted or unsubstituted C6 to C20 aryl group, and
q1 and q2 are each independently an integer of 0 to 5,
wherein, in Chemical Formula 2,
R3 is a nitro group,
R4 and R5 are each independently a substituted or unsubstituted C1 to C10 alkyl group or a substituted or unsubstituted C1 to C10 alkoxy group,
R6 is a substituted or unsubstituted C1 to C10 alkyl group,
R7 is a substituted or unsubstituted C1 to C10 alkoxy group, and
q3, q4, and q5 are each independently an integer of 0 to 5, and 1≤q4+q5≤5,
wherein, in Chemical Formula 3,
R8 to R10 are each independently a substituted or unsubstituted C1 to C10 alkyl group or a substituted or unsubstituted C1 to C10 alkoxy group,
R11 is a substituted or unsubstituted C1 to C10 alkyl group, and
q6 is an integer of 0 to 5,
wherein, in Chemical Formula 4, R12 is a substituted or unsubstituted C1 to C10 alkyl group or a substituted or unsubstituted C3 to C10 cycloalkyl group,
wherein, in Chemical Formula 6, R17 to R19 are each independently a substituted or unsubstituted C1 to C10 alkyl group.

### Claim 2 (depends on 1)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 1, wherein the first photopolymerization initiator and the second photopolymerization initiator are included in a weight ratio of about 4:6 to about 6:4.

### Claim 3 (depends on 1)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 1, wherein the first photopolymerization initiator has maximum absorbance in a wavelength region of about 270 nm to about 300 nm or about 390 nm to about 450 nm.

### Claim 4 (depends on 1)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 1, wherein the binder resin further includes one of a cardo-based binder resin and an acryl-based binder resin.

### Claim 5 (depends on 1)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 1, wherein the polyamic acid-polyimide copolymer has a weight average molecular weight of about 5,000 g/mol to about 20,000 g/mol.

### Claim 6 (depends on 1)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 1, wherein the black colorant includes an organic black pigment and an inorganic black pigment.

### Claim 7 (depends on 6)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 6, wherein the organic black pigment is included in an amount of about 5 parts by weight to about 10 parts by weight relative to 1 part by weight of the inorganic black pigment.

### Claim 8 (depends on 1)

A black pixel defining layer manufactured using the photosensitive resin composition for a black pixel defining layer as claimed in claim 1.

### Claim 9 (depends on 8)

A display device including the black pixel defining layer as claimed in claim 8.

### Claim 10 (depends on 9)

The display device as claimed in claim 9, wherein the display device is an organic light emitting diode (OLED).

### Claim 11 (depends on 1)

The photosensitive resin composition for a black pixel defining layer as claimed in claim 1, wherein the mole ratio of the polyamic acid repeating unit to the polyimide repeating unit is 6:4 to 9:1.