Patent ID: 7489079

Claim:
A plasma display device comprising: a front substrate; a back substrate opposed to said front substrate so as to form a discharge space between said front substrate and said back substrate; a plurality of barrier ribs provided in said discharge space so as to partition said discharge space; a plurality of display electrodes including transparent electrodes and bus electrodes disposed on said front substrate so as to form a plurality of discharge cells between said barrier ribs; a dielectric layer disposed above said front substrate; and a phosphor layer which emits light by discharge between said display electrodes, wherein said dielectric layer is constructed of a lower layer and an upper layer, wherein said lower layer of said dielectric layer is disposed on said front substrate so as to cover said display electrodes, wherein said upper layer of said dielectric layer is disposed so as to cover said lower layer of said dielectric layer, and is disposed so as to be closer to said discharge space than said lower layer of said dielectric layer, wherein said lower layer of said dielectric layer has a higher dielectric constant than said upper layer of said dielectric layer, wherein said lower layer of said dielectric layer has a higher softening point than said upper layer of said dielectric layer, wherein said upper layer of said dielectric layer, in each of said discharge cells, includes a recessed part located inside of said bus electrodes of said discharge cell and inside of said barrier ribs, and a surface of said lower layer of said dielectric layer is exposed through said recessed parts to said discharge space, wherein, in each of said discharge cells, said recessed part is disposed so as to at least partially overlap said transparent electrodes, and said recessed part is disposed at a position at least 20 μm away from said barrier ribs, and wherein, in each of said discharge cells, a discharge is limited to a bottom portion of said recessed part.