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. 26, 2002
Filed:
Jun. 29, 2000
Applicant:
Inventor:
Hideko Fukushima, Saitama-ken, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B 3/12 ;
U.S. Cl.
CPC ...
H01B 3/12 ;
Abstract
An alumina ceramic composition comprising 10 weight % or less (calculated as MgO) of Mg, and 0.2-10 weight % or more (calculated as TiO ) of Ti, the balance being substantially an Al O phase and inevitable impurities. An Al TiO phase is precipitated in grain boundaries. The Al TiO phase surrounds inevitable impurities in the grain boundaries. The alumina ceramic composition exhibits a Q factor of 850 or more when measured at a frequency of 10 GHz.