# US 5,352,478 A · Plasma display panel and method of manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,352,478 A - Document ID: US5352478A - Status: Granted - Kind: A - Application number: 07/870,243 - Filed: 1992-04-17 - Granted: 1994-10-04 - Earliest claimed: 1982-02-10 - Assignees: Dai Nippon Insatsu Kabushiki Kaisha - Inventors: Toru Miyake; Yoshiki Kudo; Naoshige Higuchi - Web page: https://patentgrep.com/patent/US5352478A ## CPC - H01J 9/241: {the vessel being for a flat panel display (H01J9/261 takes precedence; flat discharge lamps H01J9/248)} - H01J 11/12: with main electrodes provided on both sides of the discharge space - H01J 11/42: Fluorescent layers - H01J 17/492: {with crossed electrodes} - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) ## Abstract A plasma display panel comprises a front plate disposed on the side of a viewer, a rear plate disposed in parallel and opposing the front plate, and cell barriers arranged between the front and rear plates of matrix shape or linear shape. The cell barrier is formed of a material including a phosphor. The cell barriers are formed by printing multiple times a phosphor paste containing glass frit in an overlapped manner by a screen printing method. The cell barrier is formed in another method in which a positive pattern of cell barriers are formed on the front or rear plate by using photo resist, a slurry containing a phosphor fills in portions except for the pattern of the photo resist, and the photo resist is thereafter removed to thereby form cell barriers. In the case of the cell barrier of a color display PDP, the cell barrier may be composed of a material containing phosphor of different colors each with a width corresponding to a one half width of the cell barrier. ## Claims ### Claim 1 A method manufacturing a plasma display panel comprising a front plate, a rear plate disposed in parallel to the front panel in an opposing relation, and cell barriers as display elements arranged between the front and rear plates, the cell barriers being of matrix or linear structure forming a plurality of cells, characterized in that the cell barriers are formed by printing phosphor paste containing glass frit multiple times in an superimposing manner by a screen printing method, drying the phosphor/glass paste after each printing, and sintering the phosphor/glass paste after formation of the cell barriers. ### Claim 2 (depends on 1) A method according to claim 1, wherein a width corresponding to a one-half width of each cell barrier is formed by superimposing phosphor pastes of different colors. ### Claim 3 (depends on 1) A method according to claim 1, wherein the cell barriers are formed by printing phosphor paste containing glass frit multiple times in a superimposing manner by a screen printing method and a light-absorbing layer is formed on the cell barriers. ### Claim 4 (depends on 1) A method according to claim 1, wherein a light-absorbing layer is formed on the front plate and the cell barriers are formed thereafter by printing phosphor paste including glass frit multiple times in a superimposing manner by a screen printing method. ### Claim 5 A method of manufacturing a plasma display panel comprising a front plate, a rear plate disposed in parallel to the front panel in an opposing relation, and cell barriers as display elements arranged between the front and rear plate, the cell barriers being of matrix or linear structure forming a plurality of cells, characterized in that a positive pattern of cell barriers is formed by applying a photo reisit on the front or rear plate, curing part of the photo resist, removing uncured photo resist leaving the cured photo resist to form the positive pattern, applying a phosphor-containing slurry to portions of the plate not covered by the pattern of the photo resist, drying the phosphor-containing slurry, and removing the photo resist pattern to thereby form cell barriers. ### Claim 6 (depends on 5) A method according to claim 5, wherein a portion having a width corresponding to half width of the cell barrier is formed of a slurry containing a phosphor of monochromatic color and another portion having a width corresponding to another half width of the cell barrier is thereafter formed of a slurry containing phosphor of a different color. ### Claim 7 (depends on 5) A method according to claim 5, wherein said slurry containing phosphor includes polyvinyl alcohol. ### Claim 8 (depends on 5) A method according to claim 5, wherein said slurry containing phosphor includes glass frit and the slurry containing phosphor is sintered simultaneously with the thermal removal of the photo resist. ### Claim 9 (depends on 5) A method according to claim 5, wherein said slurry containing phosphor includes glass frit and the slurry containing phosphor is sintered after the photo resist is removed by solvent. ### Claim 10 (depends on 5) A method according to claim 5, wherein a light-absorbing layer is formed on the cell barriers on the side of the viewer after the formation of the cell barriers on the rear plate. ### Claim 11 (depends on 5) A method according to claim 5, wherein a light-absorbing layer is formed on the front plate and the cell barriers are thereafter formed on the light-absorbing layer.