The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2017
Filed:
Apr. 17, 2014
Osram Opto Semiconductors Gmbh, Regensburg, DE;
Bianca Pohl-Klein, Gilching, DE;
Juliane Kechele, Stadtbergen, DE;
OSRAM Opto Semiconductors GmbH, Regensburg, DE;
Abstract
A method can be used for producing a powdery precursor material of the following general composition I or II or III or IV: I: (CaSr) AlSiN:X1 II:(CaSrLi) AISi (NF)3:X2 III: ZAlSiN: X3 IV: (ZLi)AlSi(NF): X4. The method includes A) producing a powdery mixture of starting materials, wherein the starting materials comprise ions of the aforementioned compositions I and/or II and/or III and/or IV, B) annealing the mixture under a protective gas atmosphere, subsequent milling. In method step A), at least one silicon nitride having a specific area of greater than or equal to 5 m/g and smaller than or equal to 100 m/g is selected as starting material. The annealing in method step B) is carried out at a temperature of less than or equal to 1550° C.