Patent ID: 6509684
Filing Date: 2003-01-21
Classification: C03C,H01J

Abstract:
A method for producing a CRT panel glass or a CRT, which comprises disposing baffle plates between an outer surface of a CRT panel on which a film is formed and a sputter target, and forming a surface treating film on the outer surface of said panel by a sputtering method so that the value A defined by the following mathematical expression (1) is less than 1 within an effective picture plane on the outer surface of said panel: A&it;â€ƒ&it;value=&LeftBracketingBar;1-Tgf&it;â€ƒ&it;(min)Tgf&it;â€ƒ&it;(max)1-Tg&it;â€ƒ&it;(min)Tg&it;â€ƒ&it;(max)&RightBracketingBar;(1)In the above mathematical expression (1):Tg(min) and Tg(max) represent the minimum transmittance (%) and the maximum transmittance (%) of the CRT panel itself, respectively; and Tgf(max) and Tgf(min) represent the maximum transmittance (%) and the minimum transmittance (%) of an integrated body comprising the CRT panel and the surface treating film, respectively.