Plasma display panel having coplanar eletrodes with constant width

A plasma display panel comprising a first plate and a second plate leaving between them a space filled with a discharge gas and partitioned into a number of discharge cells that are arranged in rows and columns, which also includes an array of insulating barrier ribs comprising barrier ribs Reach separating two adjacent columns of cells and each having a base resting on the said second plate and a top in contact with the said first plate, this first plate including at least two arrays of coplanar electrodes called sustain electrodes, which are oriented along general directions that are parallel to one another and to the said rows, which are placed so that each discharge cell is traversed by an electrode of each array, therefore forming a pair, and which have edges called initiation edges which face one another on either side of the gap separating the electrodes of each pair, wherein each column separation barrier rib comprises, at its top and over its entire width, a succession of low-permittivity regions that extend at least on each side of the gap separating the electrodes of each pair, at least starting from a line located 80 μm to the rear of the initiation edges of the electrodes of this pair, and which have a thickness of greater than 3 μm but not exceeding one fifth of the total height of the said barrier ribs, and a mean dielectric permittivity at least three times smaller than the dielectric permittivity of the said barrier ribs measured at their base.