A METHOD TO ENCAPSULATE PHOSPHOR VIA CHEMICAL VAPOR DEPOSITION

Title:

A METHOD TO ENCAPSULATE PHOSPHOR VIA CHEMICAL VAPOR DEPOSITION

Document Type and Number:

WIPO Patent Application WO2004104131

Kind Code:

A3

Abstract:

The maintenance characteristics of the phosphors (60) used in VUV-excited devices such as plasma display panels can be improved by applying a coating of an aluminum oxyhydroxide compound by reacting vaporized trimethylaluminum with water vapor at a temperature of about 430 °C or above. In particular, the maintenance of an europium-activated, calcium-substituted barium hexa-aluminate phosphor (60) is significantly improved following exposure to a high intensity VUV flux.

Inventors:

FAN CHEN-WEN (US)
CHAU CHUNG-NIN (US)
MARKING GREGORY A (US)
EDGERTON WILLIAM F (US)

Application Number:

PCT/US2004/014948

Publication Date:

April 28, 2005

Filing Date:

May 13, 2004

Export Citation:

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Assignee:

OSRAM SYLVANIA INC (US)
FAN CHEN-WEN (US)
CHAU CHUNG-NIN (US)
MARKING GREGORY A (US)
EDGERTON WILLIAM F (US)

International Classes:

B32B33/00; C09K11/02; C09K11/59; C09K11/64; C09K11/77; C23C16/30; C23C16/40; C23C16/44; H01J1/62; H01J63/04; C09K; H01J; (IPC1-7): C23C16/30; C23C16/40; B32B33/00

Foreign References:

US5220243A	1993-06-15
US5994831A	1999-11-30
US4892757A	1990-01-09
US6486021B2	2002-11-26

Other References: