Patent ID: 7427837
Filing Date: 2008-09-23
Classification: H01J

Abstract:
1. A rear plate of a plasma display panel, the rear plate comprising: a glass substrate; electrodes formed in a shape of patterns on an upper surface of the glass substrate; a dielectric layer formed on upper surfaces of the electrode and the upper surface of the glass substrate; barrier ribs formed in a shape of a pattern through etching on an upper surface of the dielectric layer; and phosphorous layers formed on side surfaces and bottom surfaces of the barrier ribs, to emit visible rays according to electric signals, wherein: the electrodes include an effective electrode portion formed at a central portion of the glass substrate to apply an address signal, an electrode pad portion formed at a peripheral portion of the glass substrate and connected with a driving circuit to transfer a signal, and an electrode connecting portion interconnecting the effective electrode portion and the electrode pad portion, and has a specific resistance of 2.5×10 the dielectric layer covers all of the effective electrode portion and a part of the electrode connecting portion of each electrode, and is made from complex of glass and ceramic filler, which has a dielectric constant of 8˜20, a reflectance of 50˜80%, an etching rate of 0.03˜0.8 μm/min with respect to inorganic acid, and a thickness of 10˜30 μm; the barrier ribs are formed in a shape of stripes on the upper surface of the dielectric layer while being located between the effective electrode portions, and are made from complex of glass and ceramic filler, which has a dielectric constant of 7˜18, a reflectance of 40%˜70%, an etching rate of 1.0˜30.0 μm/min with respect to inorganic acid, and a thickness of 100˜160 μm, and each of the barrier ribs meets conditions, A/B=0.67˜1.25 and B/C=0.32˜1.0, wherein A, B, and C represent width of an uppermost portion, a middle portion, and a lowermost portion of each barrier rib, respectively; the phosphorous layers have a thickness of 10˜30 μm.