Patent ID: 7659668

Claim:
A plasma display device comprising: a pair of substrates confronting each other so as to form a discharge space between the substrates; a barrier rib arranged on at least one of the substrates to divide the discharge space into a plurality of spaces; a group of electrodes arranged on the substrates so as to generate discharge in the discharge space divided with the barrier rib; and a phosphor layer, which emits light by discharge, on the substrate, wherein the phosphor layer is equipped with a green phosphor layer including a mixture of Zn 2 SiO 4 :Mn and (Y, Gd)BO 3 :Tb, a surface of the Zn 2 SiO 4 :Mn is coated with magnesium oxide, and the ratio of an Mg element to a Si element on the surface measured with an XPS apparatus is not less than 0.7 nor more than 6.0.