# US 7,411,780 B2 · Paste, display member, and process for production of display member

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- Number: US 7,411,780 B2
- Document ID: US7411780B2
- Status: Granted
- Kind: B2
- Application number: 10/952,909
- Filed: 2004-09-30
- Published: 2005-04-14
- Granted: 2008-08-12
- Earliest claimed: 2000-05-23
- Assignees: Toray Industries, Inc.
- Inventors: Hiroko Uegaki; Norikazu Tabata; Takai Masaki; Hiromitsu Takahashi; Akihiko Tanaka; Mitsuyo Hashimoto
- Web page: https://patentgrep.com/patent/US7411780B2

## CPC

- G03F 7/0007: {Filters, e.g. additive colour filters; Components for display devices}
- C09D 175/04: Polyurethanes
- G03F 7/0047: {characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing}
- G03F 7/027: Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds (G03F7/075 takes precedence)
- G03F 7/035: the binders being polyurethanes
- 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)
- 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)

## Abstract

A display member, particularly a plasma display member, can be produced by a process including applying a paste which includes a urethane compound and inorganic fine particles onto a substrate and then firing the paste. The display member has a post-firing pattern without any defect.

## Claims

### Claim 1

A paste comprising a urethane compound, inorganic fine particles and an organic solvent, wherein the inorganic fine particles comprise low melting glass powder having a softening point under load of from 450° C. to 600° C.

### Claim 2 (depends on 1)

A paste according to claim 1, wherein the content of the inorganic fine particles in the paste is in the range of from 40 to 80 wt %.

### Claim 3 (depends on 1)

A paste according to claim 1, wherein the urethane compound comprises a urethane compound having an ethylenic unsaturated group.

### Claim 4 (depends on 1)

A paste according to claim 1, wherein the urethane compound has a molecular weight ranging from 15,000 to 50,000.

### Claim 5 (depends on 1)

A paste according to claim 1, wherein the content of the urethane compound in the paste is in the range of from 0.1 to 20 wt %.

### Claim 6 (depends on 1)

A paste according to claim 1, wherein the urethane compound contains an ethylene oxide unit.

### Claim 7 (depends on 1)

A paste according to claim 1, wherein the paste further comprises a polymer having a carboxyl group.

### Claim 8 (depends on 7)

A paste according to claim 7, wherein the polymer having a carboxyl group has an ethylenic unsaturated group.