Patent · US Active

Phosphor particle coating

US11912918B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

LUMILEDS LLC · US

Inventors

Jens Meyer · Dresden, DE
Andreas Tücks · Aachen, DE
Peter Josef Schmidt · Aachen, DE
Erik Roeling · Son en Breugel, NL

Key dates

Filing date	Jun 29, 2021
Grant date	Feb 27, 2024
Priority date	—
Expiry date	Jun 29, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/855
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention provides a method for providing a luminescent particle (100) with a hybrid coating, the method comprising: (i) providing a luminescent core (102) comprising a primer layer (105) on the luminescent core (102); (ii) providing a main ALD coating layer (120) onto the primer layer (105) by application of a main atomic layer deposition process, the main ALD coating layer (120) comprising a multilayer (1120) with two or more layers (1121) having different chemical compositions, and wherein in the main atomic layer deposition process a metal oxide precursor is selected from a group of metal oxide precursors comprising Al, Zn, Hf, Ta, Zr, Ti, Sn, Nb, Y, Ga, and V; (iii) providing a main sol-gel coating layer (130) onto the main ALD-coating layer (120) by application of a main sol-gel coating process, the main sol-gel coating layer (130) having a chemical composition different from one or more of the layers (1121) of the multilayer (1120).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.