Method of making a single layer multi-color luminescent display

Details Method of making a single layer multi-color luminescent display Method of making a single layer multi-color luminescent display

1992-03-24

1993-03-16

Bell, Janyce

Coating processes

Direct application of electrical, magnetic, wave, or...

Ion plating or implantation

427 66, 427 68, 427108, 427109, 4271261, 427282, 4273722, 4271262, B05D 306, B05D 506

Patent

active

051942909

ABSTRACT:
The invention is method of forming a multi-color luminescent display including the steps of depositing on an insulator substrate a smooth single layer of host material which itself may be a phosphor with the properties to host varying quantities of different impurities and introducing one or more of said different impurities into selected areas of the single layer of host material via an appropriately positioned mask as by thermal diffusion or ion-implantation to form a pattern of phosphors of different colors in the single layer of host material such that the top surface of the host layer remains smooth. Red phosphors are formed by adding impurities selected from the group consisting of Sm, SmF.sub.3, Eu, EuF.sub.3, and ZnS:MnTbF.sub.3 to a ZnS host; green phosphors by adding impurities selected from the group consisting of Tb and TbF.sub.3 to a ZnS host; and blue phosphors by adding impurities selected from the group consisting of Tm, Al, Ag and Mg to a ZnS host.

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