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:
Sep. 20, 2005
Filed:
Mar. 26, 2002
Applicants:
Osamu Chikagawa, Shiga-ken, JP;
Sadaaki Sakamoto, Shiga-ken, JP;
Yoichi Moriya, Omihachiman, JP;
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C014/00 ;
U.S. Cl.
CPC ...
Abstract
An insulating ceramic composition includes a mixture of a ceramic powder containing MgAlOand a glass powder containing 30-60% by mole of silicon oxide on the basis of SiOand 20-55% by mole of magnesium oxide on the basis of MgO, and the ceramic powder further includes MgSiOand TiO. The insulating ceramic composition can be fired at 1000° C. and co-sintered with Ag and Cu. An insulating ceramic obtained by sintering the insulating ceramic composition has a high Q-factor and is therefore suitable for ceramic multilayer substrates used at high frequencies.