Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1980-10-06
1983-05-10
Smith, John D.
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
427108, 427157, 427226, 427379, 427380, H05B 3310, B05D 302
Patent
active
043829791
ABSTRACT:
A method of manufacturing a fluorescent display apparatus divided into a plurality of sections each having a plurality of anode conductors disposed on a base plate made of an insulating material, wherein phosphor layers are applied on the anode conductors in each of the sections using phosphors of different luminous colors to obtain a plurality of display sections for illuminating different luminous colors upon impingement of electrons, comprising the steps of forming a first phosphor paste comprising a phosphor compound capable of emitting a particular luminous color, a volatile solvent and a solid film forming element decomposable by the application of heat at a temperature higher than the volatilization temperature of the solvent; forming a second phosphor paste consisting of a phosphor compound capable of emitting a particular luminous color different from that of the first phosphor paste and a volatile solvent; screen printing the first paste to the anode conductors of at least one section of the display apparatus; nextly volatilizing the solvent of the first screen printed paste at a temperature above the volatilization temperature of the solvent and below the decomposition temperature of the solid film forming element to transform the solid film forming element into a solid film; depositing the second paste on the anode conductors of the remaining section of said display apparatus and baking the base plate with the phosphor films formed thereon to eliminate the film forming element from the first phosphor paste, leaving only the respective phosphor compound on the anode conductors on each respective display section.
REFERENCES:
patent: 2312229 (1943-02-01), Anderson
patent: 3625733 (1971-12-01), Mansur
patent: 3661615 (1972-05-01), Gray et al.
patent: 3779807 (1973-12-01), Taylor et al.
patent: 4020191 (1977-04-01), Nagashiro et al.
patent: 4025669 (1977-05-01), Greenstein
patent: 4047073 (1977-09-01), Kishino
patent: 4119745 (1978-10-01), Smith
patent: 4132920 (1979-01-01), Kobayakawa et al.
patent: 4155030 (1979-05-01), Chang
Eto Goro
Miyazawa Hisashi
Tanaka Kazunori
Toki Hitoshi
Futaba Denshi Kogyo K.K.
Smith John D.
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