Patent ID: 6447654
Filing Date: 2002-09-10
Classification: C09K,C23C

Abstract:
A method of deposition of a phosphor in a single-source sputtering process, said phosphor being selected from the group consisting of ternary, quaternary or higher thioaluminate, thiogallate and thioindate phosphors, and composites thereof, synthesized with cations selected from Groups IIA and IIB of the Periodic Table of Elements, said phosphor having a pre-determined composition of elements, said method comprising sputtering in a hydrogen sulphide atmosphere from a single source composition so as to deposit the phosphor on a substrate, the single source composition having a relative increase in concentration of elements of said phosphor that are of greater volatility compared to other elements in said phosphor, said relative increase being controlled such that deposition of said predetermined composition of elements is effected on the substrate.