Protecting layer having magnesium oxide particles at its surface, method of preparing the same, and plasma display panel comprising the protecting layer

A method of forming a protecting layer for a PDP, the method comprising:

• forming a magnesium oxide-containing layer on a substrate;
• preparing magnesium oxide-containing particles;
• and
• attaching the magnesium oxide-containing particles to a surface of the magnesium oxide-containing layer.

A plasma display panel comprising:

• a first substrate;
• a second substrate facing the first substrate;
• a plurality of barrier ribs which define discharge cells and which are disposed between the first substrate and the second substrate;
• address electrodes which extend in a first direction along the discharge cells and which are covered by a second dielectric layer;
• sustain electrodes which extend in a second direction perpendicular to the first direction and which are covered by a first dielectric layer;
• a protecting layer formed on the first dielectric layer or on the second dielectric layer, the protecting layer comprising:
• a magnesium oxide-containing layer;
• and
• magnesium oxide-containing particles formed on a surface of the magnesium oxide-containing layer, the magnesium oxide-containing particles having a magnesium vacancy-impurity center (VIC);
• a phosphor layer formed inside the discharge cells;
• and
• a discharge gas filling the discharge cells.