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:
Jul. 01, 2014
Filed:
Nov. 25, 2009
Takafumi Kawano, Yamaguchi, JP;
Masataka Yamanaga, Yamaguchi, JP;
Atsushi Okabe, Yamaguchi, JP;
UBE Industries, Ltd., Yamaguchi, JP;
Abstract
There is provided a dielectric ceramic composition for high-frequency use represented by a composition formula of a(Sn,Ti)O-bMgSiO-cMgTiO-dMgSiO. In the composition formula, a, b, c and d (provided that a, b, c and d are mol %) are within the following ranges: 4≦a≦37, 34≦b≦92, 2≦c≦15 and 2≦d≦15, respectively, and a+b+c+d=100. The dielectric ceramic composition for high-frequency use has a relative permittivity ∈of 7.5-12.0, a Q×fvalue of not less than 50000 (GHz) and an absolute value of a temperature coefficient τof resonance frequency fof not more than 30 ppm/° C.