Filming composition for cathode ray tube and method of manufacturing screen using the same

• US 5,587,201 A
• Filed: 03/30/1995
• Issued: 12/24/1996
• Est. Priority Date: 12/07/1994
• Status: Expired due to Fees

• Current Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Original Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Inventors: Kim, Jae-myung, Rho, Hwan-chul, Choi, Hong-gyu
• Primary Examiner(s): BELL, JANYCE A
• Application Number:
  US08/413,888
• Time in Patent Office: 635 Days
• Field of Search: 427/64, 427/68, 427/389.7, 427/419.1, 427/407.2, 427/226, 427/227, 524/284, 524/434, 524/436
• US Class Current: 427/64
• CPC Class Codes: H01J 29/28 with protective, conductive or reflective layers
• CPC Class Codes: H01J 29/327 Black matrix materials
• CPC Class Codes: H01J 9/2271 by photographic processes final treatment of shadow-mask prior to or after dot deposition H01J9/144

Abstract

A method for manufacturing a screen having high luminance is provided including the steps of forming a phosphor layer on a black matrix adhered to a panel, forming a filming layer by coating and drying a filming composition containing a decomposable organic polymer and a reducing agent on the phosphor layer, forming a metal layer on the filming layer, and heating the phosphor layer, filming layer and metal layer to a temperature sufficient to decompose the filming layer.

Claims

1. A method for manufacturing a screen having high luminance comprising the steps of:

forming a phosphor layer on a black matrix adhered to a panel;

forming a filming layer by coating and drying a filming composition containing a decomposable organic polymer and a reducing agent on said phosphor layer;

forming a metal layer on said filming layer; and

heating said phosphor layer, filming layer and metal layer to a temperature sufficient to decompose said filming layer.

2. A method for manufacturing a screen as claimed in claim 1, wherein said reducing agent is at least one strong reducing agent selected from the group consisting of MgH₂, alkali metal salts, zinc salts, tin salts and formic acid.

3. A method for manufacturing a screen according to claim 2 wherein said salts are nitrate, sulfate or chloride.

4. A method for manufacturing a screen as claimed in claim 1, wherein the amount of said reducing agent is 1.0˜

5.0 wt % based on the total amount of said filming composition.

5. A method for manufacturing a screen according to claim 1 wherein said decomposable organic polymer includes an acryl resin.