Patent ID: 8294366

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 the first substrate so as to form a discharge space filled with discharge gas, the second substrate 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 aluminum, 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, wherein a plurality of aggregated particles are attached to the protective layer at a face confronting the discharge space, an aggregated particle from among the plurality of aggregated particles being formed by aggregating multiple crystal particles of magnesium oxide, and wherein the density of the aluminum in the protective layer is within a range between 100 ppm and 1000 ppm inclusive.