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:
Apr. 29, 2008
Filed:
May. 10, 2007
Seiji Miyazaki, Yokohama, JP;
Kei Maeda, Yokohama, JP;
Seiji Miyazaki, Yokohama, JP;
Kei Maeda, Yokohama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
Provided is a crystallized glass spacer for a field emission display resistant to charging with application of an electric field and resistant to chipping or cracking thanks to high fracture toughness. An SiO—TiO-based glass is subjected to a reduction and crystallization heat treatment at 600-900° C. in a hydrogen atmosphere or in a mixed atmosphere of hydrogen and nitrogen, to obtain a crystallized glass spacer for FED consisting essentially of, in molar percentage, SiO: 20-50%, TiO: 25-45%, MgO+CaO+SrO+BaO+ZnO: 20-50%, BO+AlO: 0-10% and ZrO: 0-10%, and containing as a principal crystal at least one crystal selected from BaTiO-based crystals (X=0.8-1.5), BaTiSiO-based crystals and TiO-based crystals.