PLASMA DISPLAY PANEL

PURPOSE:To maintain the discharge maintaining voltage at a low value and to suppress a deterioration of the discharge property for a long period by placing a nonreactive layer of a conductive agent between a base layer which consists of a metal and a surface layer which consists of a metal hexaboride, and incorporating them to form a cathode. CONSTITUTION:Between a rear side plate 2 and a dielectric layer 7, a trigger electrode 8 which consists of a good conductive layer is provided to reduce the discharge maintaining voltage. Then, a metal layer 9 which consists of nickel and a surface layer 10 which consists of a rare earth metal hexaboride such as lanthanum hexaboride are laminated on the layer 7. And a layer 11 of titanium diboride to be a nonreactive conductive agent to prevent the reaction of the nickel and the lanthanum hexaboride is placed between the layers 9 and 10 to form a cathode. As a result, the discharge maintaining voltage of a plasma display panel is maintained at a low value, and a deterioration of discharge property can be suppressed for a long period.