Patent ID: 7528547

Claim:
A plasma display panel comprising: first and second substrates positioned facing each other and separated from each other by a predetermined distance; a plurality of address electrodes positioned on the first substrate; a first dielectric layer covering the plurality of address electrodes; a plurality of barrier ribs mounted on the first dielectric layer, providing discharge spaces between the first and second substrates; a plurality of phosphor layers formed in the discharge spaces; a plurality of discharge sustain electrodes positioned on the second substrate; a second dielectric layer covering the discharge sustain electrodes; and a protection layer covering the second dielectric layer, the protection layer comprising MgO and a dopant comprising Ca, Al, Fe, and Si, wherein Ca is present in an amount of about 100 to about 300 ppm based on the amount of MgO, Al is present in an amount of about 60 to about 90 ppm based on the amount of MgO, Fe is present in an amount of about 60 to about 90 ppm based on the amount of MgO, and Si is present in an amount of about 40 to about 100 ppm based on the amount of MgO.