Patent ID: 7795811

Claim:
A plasma display panel comprising a substrate, a dielectric layer, a protective film, and display electrodes formed on the substrate, the dielectric layer, and the protective film, wherein the protective film is a metal oxide film including magnesium oxide, wherein a product of a film thickness of the protective film at any arbitrary point in the protective film and a ratio of a maximum luminescence intensity of light emission having a wavelength between 400 nm and 450 nm to a maximum luminescence intensity of light emission having a wavelength between 330 nm and 370 nm, as measured in accordance with a cathode luminescence method, at the arbitrary point has variation within a range of ±15% as a distribution within a surface of the protective film, and wherein the ratio of the maximum luminescence intensity of light emission having the wavelength between 400 nm and 450 nm to the maximum luminescence intensity of light emission having the wavelength between 330 nm and 370 nm, as measured in accordance with the cathode luminescence method, is 1.08 or higher.