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:
Jul. 15, 2008
Filed:
Feb. 18, 2005
Yi-qun LI, Walnut Creek, CA (US);
Shifan Cheng, Moraga, CA (US);
Ning Wang, Martinez, CA (US);
Yi Dong, Tracy, CA (US);
Xiao-dong Sun, Fremont, CA (US);
Yi-Qun Li, Walnut Creek, CA (US);
Shifan Cheng, Moraga, CA (US);
Ning Wang, Martinez, CA (US);
Yi Dong, Tracy, CA (US);
Xiao-Dong Sun, Fremont, CA (US);
Intematix Corporation, Fremont, CA (US);
Abstract
Embodiments of the present invention are directed to compositions and processing methods of rare-earth vanadate based materials that have high emission efficiency in a wavelength range of 480 to 700 nm with the maximum intensity at 535 nm (bright yellow) under UV, X-ray and other forms of high-energy irradiation. Embodiments of the present invention are directed to general chemical compositions of the form (GdA)(VB)(OC), where A is selected from the group consisting of Bi, Tl, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu for 0<x<0.2; B is Ta, Nb, W, and Mo for 0<y<0.1; and C is N, F, Br, and I for 0<z<0.1. Methods of preparation include sol gel, liquid flux, and co-precipitation processes.