Randall C Wentross

US Patent:

56568886, Aug 12, 1997

Filed:

Nov 13, 1995

Appl. No.:

8/555644

Inventors:

Eric R. Dickey - Beaverton OR
Richard T. Tuenge - Hillsboro OR
Randall Wentross - Corvallis OR

International Classification:

H05B 3314

US Classification:

313503

Abstract:

A novel thin-film electroluminescent (TFEL) structure for emitting light in response to the application of an electric field is disclosed. The TFEL structure includes first and second electrode layers sandwiching a TFEL stack, the stack including first and second insulator layers and a phosphor layer that includes an alkaline earth thiogallate doped with oxygen.

US Patent:

55059864, Apr 9, 1996

Filed:

Feb 14, 1994

Appl. No.:

8/195999

Inventors:

Karl-Otto Velthaus - Goppingen, DE
Reiner H. Mauch - Stuttgart, DE
T. Achim Oberacker - Gartringen, DE
Hans-Werner Schock - Stuttgart, DE
Randall C. Wentross - Portland OR
Richard T. Tuenge - Hillsboro OR

Assignee:

Planar Systems, Inc. - Beaverton OR

International Classification:

B05D 506

US Classification:

427 66

Abstract:

A multi-source reactive deposition process for preparing a phosphor layer for an AC TFEL device having the chemical formula M. sup. II M. sup. III. sub. 2 X. sub. 4 :RE, where M. sup. II is a group II metal taken from the group magnesium, calcium, strontium and barium, M. sup. III is a group III metal taken from the group aluminum, gallium and indium, X is taken from the group sulfur and selenium, and RE comprises a rare earth activator dopant taken from the group cerium and europium is disclosed. The phosphor film is formed in crystalline form on a substrate heated to a temperature between 400. degree. and 800. degree. C. by depositing more than one deposition source chemical where at least one of the deposition source chemicals of the group II metal or the group III metal is a compound.