Methods for forming uniform particle layers of phosphor material on a surface
US8323748B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Jun 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8516
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for forming a layer of an LED phosphor material includes disposing a first surface in a proximity of a powder that includes an LED phosphor material, forming electrostatic charges on the first surface, and forming a layer of the LED phosphor material on the first surface at least partially by using the electrostatic charges. In an embodiment, the method includes disposing the first surface in an interior of a chamber and forming an airborne distribution of the powder in the interior of the chamber in a vicinity of the first surface. In another embodiment, the method includes providing a reservoir of the powder and applying to said phosphor powder an electrostatic charge opposite to that of said electrostatic charge on the first surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.