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. 13, 2007
Filed:
Jun. 28, 2005
Applicants:
Koh Masahara, Kobe, JP;
Hiroshi Nonoue, Osaka, JP;
Inventors:
Koh Masahara, Kobe, JP;
Hiroshi Nonoue, Osaka, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 14/00 (2006.01); C03C 10/02 (2006.01); C03C 10/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A dielectric ceramic obtained by firing a raw material comprising an alumina powder, a crystallizable glass powder mainly containing SiO, CaO and MgO, and a noncrystallizable glass powder mainly containing SiO, BOand NaO. After the firing, the dielectric ceramic contains an alumina crystal phase, a diopside crystal phase (Ca(Mg, Al)(Si, Al)O) and a magnesia-spinel crystal phase (MgAlO) and has a porosity of not higher than 2.2% when measured by a mercury penetration method.