Method for coating phosphor particles
US4585673A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1985 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Apr 3, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method for applying a continuous protective coating to the surface of individual phosphor particles. The method involves chemical vapor deposition of the protective coating on individual particles of a phosphor powder while the phosphor particles are suspended in a fluidized bed. During the method, the fluidized particles are exposed to the vaporized coating precursor material at a first temperature, which is less than the decomposition temperature of the precursor material, and the precursor material is reacted to form the desired coating material at a second temperature, which is greater than or equal to the temperature at which the precursor material reacts to form the coating material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.