NASA 1996 SBIR Phase I


PROPOSAL NUMBER : 96-1 02.01-6000

PROJECT TITLE : Cost-Effective Field Emission Displays Using Thin-Film Oxide Phosphors

TECHNICAL ABSTRACT (LIMIT 200 WORDS)

We will develop thin-film oxide phosphors for full-color field-emission-display (FED) faceplates. We will grow phosphor host material by metalorganic chemical vapor deposition (MOCVD), adding luminescence centers by selective-area ion implantation, and explore techniques to reduce light trapping. Use of pixel definition by selective-area ion implantation is a lower cost manufacturing process than conventional multilayer etching procedures. Conventional sulfide-based powder phosphors compromise FED performance due to their granular nature, current-saturation characteristics, and limited operating lifetime. Replacement with sulfur-free, thin-film oxides can improve chromaticity, allow finer definition, increase phosphor lifetime, and reduce manufacturing costs.

Oxide-based phosphors have shown recent promise in plasma, FED, and electroluminescent display studies, with all three primary colors being reported. Phase I will deposit thin films onto inexpensive glass faceplates by MOCVD. Red, green, and blue (RGB) color centers will be introduced by ion implantation, with activation by thermal annealing. Phosphor characterization will be assisted by Dr. Paul Holloway at University of Florida. Optimization of Zn(AlxGa1-x)2O4] to find the best composition for support of all three colors, plus exploration of other oxides, will be the subject of Phase II.

POTENTIAL COMMERCIAL APPLICATIONS
Flat panel displays with increased luminance, greater color gamut, higher electrical efficiency, and longer operating life can replace cathode ray tubes in computer terminals, instrument panels, entertainment, and many other NASA and commercial display applications. There are also numerous potential applications for low cost, miniaturized flat panel displays, including air traffic control and navigation; personnel training; and equipment maintenance.
NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR
Stanley M. Vernon
Spire Corporation
One Patriots Park
Bedford, MA 01730-2396

NAME AND ADDRESS OF OFFEROR
Spire Corporation
One Patriots Park
Bedford, MA 01730-2396