Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1991-10-18
1994-10-18
Nold, Charles R.
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
428690, 428917, 427 69, 4272551, 118715, 445 11, H01J 912
Patent
active
053566572
ABSTRACT:
Disclosed is an electroluminescent device including a substrate and an electroluminescent film on the substrate wherein the electroluminescent film is composed of a II-VI group compound semiconductor matrix and an electroluminescent center element; the improvement being present in that the electroluminescent film has a crystal structure of a hexagonal system, and contains the electroluminescent center element in a concentration (Ci) of 0.5 to 4 at. % within a thickness of 0.2 micrometer from the side of the substrate and in a concentration (Cr) of 0.15 to 0.7 at. % at the residual portion, and Ci is larger than Cr, and the process for preparing the same.
REFERENCES:
patent: 4389973 (1983-06-01), Suntola et al.
patent: 4728581 (1988-03-01), Kane et al.
patent: 4907043 (1990-03-01), Uekita et al.
patent: 5087531 (1992-02-01), Terada et al.
Mikami Akiyoshi
Nakajima Shigeo
Tanaka Koichi
Taniguchi Kouji
Terada Kousuke
Nold Charles R.
Sharp Kabushiki Kaisha
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