Phosphor particles with a protective layer, and method for producing the phosphor particles with the protective layer

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United States of America Patent

PATENT NO 10738238
APP PUB NO 20180044585A1
SERIAL NO

15556279

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Abstract

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Phospher particles with a Protective Layer and a method for producing phosphor particles with a protective layer are disclosed. In an embodiment the method includes treating Si-containing and/or Al-containing phosphor with an acid solution, wherein a pH value of the acid solution is maintained within a range of pH 3.5 to pH 7 for a period of at least 1 h, wherein an Si-containing layer is formed on the phosphor particles, wherein the Si-containing layer has a higher content of Si on a surface than the phosphor particles, and/or wherein an Al-containing layer is formed on the phosphor particles, wherein the Al-containing layer has a modified content of aluminum on the surface than the phosphor particles and tempering the treated phosphor particles at a temperature of at least 100° C. thereby producing the protective layer.

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Patent Owner(s)

Patent OwnerAddress
OSRAM GMBHMARCEL-BREUER-STR 6 MUENCHEN 80807
OSRAM OPTO SEMICONDUCTORS GMBHLEIBNIZSTRASSE 4 REGENSBURG 93055

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fiedler, Tim Landsberg Am Lech, DE 45 586
Lange, Stefan Augsburg, DE 77 562
Tragl, Sonja Augsburg, DE 9 27

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