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:
Mar. 21, 2000
Filed:
Dec. 05, 1997
Angel Sanjurjo, San Jose, CA (US);
Kai-Hung Lau, Cupertino, CA (US);
David Lowe, Hayward, CA (US);
Anastasia Canizales, San Francisco, CA (US);
Naixiong Jiang, Palo Alto, CA (US);
Victor Wong, Daly City, CA (US);
Liqiang Jiang, San Jose, CA (US);
Luke V Schneider, Half Moon Bay, CA (US);
Naheed Mufti, Castro Valley, CA (US);
Robert T Rewick, Mountain View, CA (US);
Marie Johansson, Watchung, NJ (US);
Keith Kardos, Bethlehem, PA (US);
SRI International, Mento Park, CA (US);
STC Technologies, Bethlehem, PA (US);
Abstract
The invention relates to a method for producing activated, substantially monodisperse, phosphorescent particles and particles formed thereby. The method suspends substantially monodisperse, phosphor-precursor particles in a fluidizing gas and then introduces a reactive gas to contact the suspended phosphor-precursor particles. Heating the suspended phosphor-precursor particles to a reaction temperature then forms unactivated phosphorescent particles. In another embodiment, the phosphor-precursor particles may be heated to a reaction temperature where they decompose to form the unactivated phosphor particles. The unactivated phosphorescent particles suspended within the fluidizing gas are activated by heating the unactivated phosphorescent particles to an activation temperature forming activated, substantially monodisperse, phosphorescent particles.