US 11,912,918 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)
Appl. No. 17/925,940
Filed by Lumileds LLC, San Jose, CA (US)
PCT Filed Jun. 29, 2021, PCT No. PCT/US2021/039514
§ 371(c)(1), (2) Date Nov. 17, 2022,
PCT Pub. No. WO2022/006048, PCT Pub. Date Jan. 6, 2022.
Application 17/925,940 is a continuation in part of application No. 16/915,422, filed on Jun. 29, 2020.
Claims priority of application No. 20189538 (EP), filed on Aug. 5, 2020.
Prior Publication US 2023/0193125 A1, Jun. 22, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/77 (2006.01); C09K 11/02 (2006.01); C23C 18/12 (2006.01); C23C 16/455 (2006.01); C23C 16/40 (2006.01); H01L 33/50 (2010.01); F21V 9/30 (2018.01)
CPC C09K 11/7703 (2013.01) [C09K 11/02 (2013.01); C09K 11/77346 (2021.01); C23C 16/40 (2013.01); 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 18/1254 (2013.01); F21V 9/30 (2018.02); H01L 33/502 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for providing a luminescent particle with a hybrid coating, the method comprising:
providing a particulate luminescent material having a surface;
forming a primer layer directly on at least a portion of the surface;
performing a first atomic layer deposition process on the particulate luminescent material having the primer layer to deposit a first ALD layer, the first atomic layer deposition process using a metal oxide first precursor selected from a group of metal oxides comprising Al, Zn, Hf, Ta, Zr, Ti, Sn, Nb, Y, Ga, and V;
performing a second atomic layer deposition process to deposit a second ALD layer onto the first ALD layer, the second atomic layer deposition process using a metal oxide second precursor different from the first precursor and selected from a group of metal oxides comprising Al, Zn, Hf, Ta, Zr, Ti, Sn, Nb, Y, Ga, and V; and
performing a main sol-gel coating process to form a main sol-gel coating layer directly onto the second ALD layer, the main sol-gel coating layer having a chemical composition different from the first ALD layer and the second ALD layer.