Plasma display panel with improved contrast characteristics

A plasma display panel comprising:

• a front substrate on which a scan electrode and a sustain electrode are positioned, the scan electrode and the sustain electrode each having a single-layered structure;
• a first black layer positioned between the scan electrode and the front substrate and between the sustain electrode and the front substrate, the first black layer including cobalt (Co) material and ruthenium (Ru) material;
• a rear substrate on which an address electrode is positioned and oriented to overlap the scan electrode and the sustain electrode;
• and
• a barrier rib that is positioned between the front substrate and the rear substrate to partition a discharge cell, the barrier rib including lead (Pb) equal to or less than 1,000 ppm (parts per million) and greater than 0 ppm.

A plasma display panel comprising:

• a front substrate;
• a rear substrate separated from and oriented substantially parallel to the front substrate;
• one or more address electrodes, each positioned between the front and rear substrate;
• one or more scan electrodes positioned between the address electrodes and the rear substrate;
• one or more sustain electrodes positioned between the address electrodes and the rear substrate;
• one or more first black layers positioned between the one or more scan electrodes and the front substrate and between the one or more sustain electrodes and the front substrate, the one or more first black layers each including cobalt (Co) material and ruthenium (Ru) material;
• and
• at least one barrier rib positioned between the front substrate and the rear substrate to partition a discharge cell, the at least one barrier rib including lead (Pb) equal to or less than 1,000 ppm (parts per million) and greater than 0 ppm.