Patent ID: 8222814

Claim:
A plasma display panel comprising: a first substrate; a plurality of electrodes, a dielectric layer, and a protective layer that are laid on the first substrate in the stated order; and a second substrate opposed to the first substrate, with the protective layer facing toward a discharge space, wherein the protective layer includes crystal particles disposed in a layer that is exposed to the discharge space at least partially, and the crystal particles include MgO particles satisfying a condition that a ratio of a/b is equal to 1.2 or higher, where a denotes a spectrum integral value of a portion of a cathodoluminescence spectrum corresponding to a wavelength region of 650 nm to 900 nm, exclusive of 900 nm, and b denotes a spectrum integral value of a portion of the cathodoluminescence spectrum corresponding to a wavelength region of 300 nm to 550 nm, exclusive of 550 nm.