Patent ID: 6478932
Filing Date: 2002-11-12
Classification: C03C,C23C,G02B,H01J

Abstract:
A combination process of vacuum sputtering and wet coating for forming a conductive and light attenuation anti-reflection coating on a substrate of a CRT surface; comprising following steps:forming a first layer over said substrate by a vacuum coating process, said first layer comprising an oxide material having a predetermined adhesion with a glass substrate and having a refractive index within a range of 1.45 to 1.55 at a wavelength of 520 nm, said first layer having a physical thickness of 10-30 nm; forming a second layer over said first layer by a vacuum coating process, said second layer comprising a metal having a refractive index within a range of 1.5 to 4.0 at a wavelength of 520 nm, said second layer having a physical thickness of 1-5 nm; forming a third layer over said second layer by a vacuum coating process, said third layer comprising a conductive oxide material having a refractive index within a range of 1.85 to 2.1 at a wavelength of 520 nm, said third layer having a physical thickness of 20-60 nm; forming a fourth layer over said third layer by a vacuum coating process, said fourth layer comprising an oxide material having a predetermined chemical resistance and a refractive index within a range of 2.0 to 2.5 at a wavelength of 520 nm, said fourth layer having a physical thickness of 10-40 nm; forming a fifth layer over said fourth layer by a vacuum coating process, said fifth layer comprising an oxide material having a predetermined adhesion and a predetermined chemical resistance, said oxide material having a refractive index within a range of 1.45 to 1.55 at a wavelength of 520 nm, said fifth layer having a physical thickness of 10-30 nm; and forming a sixth layer over said fifth layer by a wet process, said sixth layer comprising an oxide material having a refractive index within a range of 1.45 to 1.55 at a wavelength of 520 nm, said sixth layer having a physical thickness of 60-120 nm.