Patent ID: 8183777

Claim:
A plasma display panel comprising: a first substrate including a display electrode formed on a board, a dielectric layer covering the display electrode, and a protective layer formed on the dielectric layer; and a second substrate opposing to the first substrate to form a discharge space filled with discharge gas, and including an address electrode formed along a direction intersecting with the display electrode, and a barrier rib partitioning the discharge space; wherein the protective layer is formed of a metal oxide made of magnesium oxide and calcium oxide and contains silicon, a diffraction angle where a peak of the metal oxide occurs existing between a diffraction angle where a peak of the magnesium oxide occurs and a diffraction angle where a peak of the calcium oxide, disposed along an identical orientation of the peak of the magnesium oxide, occurs in an X-ray diffraction analysis on a surface of the protective layer, and the density of the silicon in the protective layer is within a range between 1 ppm and 10 ppm inclusive.