Patent · US Active

Phosphor particle coating

US11912914B2 · kind B2 · utility

0Cited by

2References

20Claims

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, 2020
Grant date	Feb 27, 2024
Priority date	—
Expiry date	May 18, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/8512
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention provides a method for providing a luminescent particle with a hybrid coating, the method comprising: (i) providing a luminescent core comprising a primer layer on the luminescent core; (ii) providing a main ALD coating layer onto the primer layer by application of a main atomic layer deposition process, the main ALD coating layer comprising a multilayer with two or more layers 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 onto the main ALD-coating layer by application of a main sol-gel coating process, the main sol-gel coating layer having a chemical composition different from one or more of the layers of the multilayer.

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