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. 03, 1998
Filed:
Jun. 28, 1996
Takashi Suzuki, Akita, JP;
Tomoaki Kawata, Chiba, JP;
Kunihiko Kawasaki, Akita, JP;
Masako Nitta, Ibaraki, JP;
TDK Corporation, Tokyo, JP;
Abstract
In a dielectric ceramic composition comprising TiO.sub.2 and ZnO as a main component, B.sub.2 O.sub.3 and/or a B.sub.2 O.sub.3 -containing vitreous component is contained as an auxiliary component. This establishes a low-temperature firing capability which permits Ag, Cu, Ag base alloy or Cu base alloy to be used as an internal conductor. A choice of a compositional ratio of the main component enables a choice of a temperature coefficient while a choice of the content of the auxiliary component enables a choice of a sintering temperature. It is further possible to control the crystalline structure, dielectric constant, Q value, temperature coefficient, insulation resistance (IR) and grain size of the composition by adding a Cu oxide, Ni oxide, Mn oxide, and Si oxide and adjusting their contents.