Paste, display member, and process for production of display member

• US 7,411,780 B2
• Filed: 09/30/2004
• Issued: 08/12/2008
• Est. Priority Date: 05/23/2000
• Status: Expired due to Term

• Current Assignee: Toray Industries Incorporated
• Original Assignee: Toray Industries Incorporated
• Inventors: Takahashi, Hiromitsu, Tanaka, Akihiko, Hashimoto, Mitsuyo, Uegaki, Hiroko, Tabata, Norikazu, Masaki, Takai
• Primary Examiner(s): Ha; Nguyen T
• Application Number:
  US10/952,909
• Publication Number:
  US 20050079447A1
• Time in Patent Office: 1,412 Days
• Field of Search: 445/51, 445/52, 445/54, 445 23- 26, 313/582, 313/586, 361523-525, 361528-534, 361516-519, 361502-512, 252/62.2
• US Class Current: 361/525
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: G03F 7/0007 Filters, e.g. additive colour filters; Components for display devices
• CPC Class Codes: G03F 7/0047 characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing
• CPC Class Codes: G03F 7/027 Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds G03F7/075 takes precedence
• CPC Class Codes: G03F 7/035 the binders being polyurethanes

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

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.

2. 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 %.

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

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

5. 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 %.

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

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

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