US 11,912,914 B2
Phosphor particle coating
Jens Meyer, Cologne (DE); Andreas Tücks, Aachen (DE); Peter Josef Schmidt, Aachen (DE); and Erik Roeling, Son (NL)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by Lumileds LLC, San Jose, CA (US)
Filed on Jun. 29, 2020, as Appl. No. 16/915,422.
Prior Publication US 2021/0403805 A1, Dec. 30, 2021
Int. Cl. C09K 11/02 (2006.01); C09K 11/77 (2006.01); F21V 9/30 (2018.01); C23C 16/455 (2006.01); C23C 16/40 (2006.01); C23C 28/02 (2006.01); H01L 33/50 (2010.01)
CPC C09K 11/025 (2013.01) [C09K 11/7728 (2013.01); C09K 11/77346 (2021.01); C23C 16/403 (2013.01); C23C 16/405 (2013.01); C23C 16/407 (2013.01); C23C 16/45529 (2013.01); C23C 16/45553 (2013.01); C23C 28/02 (2013.01); F21V 9/30 (2018.02); H01L 33/502 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.