Patent ID: 7977882

Claim:
A plasma display panel, comprising: discharge electrodes deposited on the inner face of a front substrate; and a dielectric layer overlying the discharge electrodes, with the front substrate facing a back substrate to define a discharge space filled with a discharge gas, wherein: the dielectric layer has a structure of a lamination of a first dielectric layer and a second dielectric layer different from the first dielectric layer; the first dielectric layer is formed of a small nano-particle silica film including silica particles having a particle diameter ranging from 10 nm to 25 nm, the first dielectric layer is a porous silica dielectric layer having a relative permittivity of 2.6, a density of 60% and a light transmittance of 99% or more; the second dielectric layer is formed of a large nano-particle silica film including silica particles having a particle diameter ranging from 25 nm to 40 nm, the second dielectric layer has a thickness ranging from 3 μm to 20 μm; and the second dielectric layer is deposited on the first dielectric layer.