Title:
PANEL FOR COLOR CATHODE-RAY TUBE
Document Type and Number:
Japanese Patent JPH1140081
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To simultaneously remove dirts and to prevent flaws which adversely affect a cathode-ray tube, by roughening the surface of a specific % or above the width direction of a panel sealing end face into the average depth, the average cycle of irregularity and a ratio of the average depth to the average cycle, respectively in the specific ranges. SOLUTION: The average depth Rz of irregularity which enables prevention generation of flaws on a panel sealing end face in transportation and to make the flaws discontinuous in the width direction needs to be in the range of 5-20 μm, and preferably is in the range of 7-15 μm. And, the generation of partial conductivity caused by the dirts can be prevented by selecting the optimum cycle of the irregularity of a roughened surface. This average cycle Sm is efficient in the range of 150-400 μm, especially it is preferably in the range of 180-300 μm. Further, it is efficient that the ratio Rz /Sm of the two parameters of the roughened surface is in the range of 0.015-0.13, in order for the compatibility of the preventive effects of the continuous flaws and the adhesion of dirt.
Inventors:
WAKATSUKI HIROSHI
MIZUKAMI MASAKI
MIZUKAMI MASAKI
Application Number:
JP19021897A
Publication Date:
February 12, 1999
Filing Date:
July 15, 1997
Export Citation:
Assignee:
ASAHI GLASS CO LTD
International Classes:
C03C19/00; H01J9/26; H01J29/86; H04N5/72; (IPC1-7): H01J29/86
Attorney, Agent or Firm:
Kenji Izumina (1 outside)