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:
Apr. 01, 2008
Filed:
Feb. 02, 2005
Naoya Mori, Omihachiman, JP;
Yoichi Moriya, Omihachiman, JP;
Jun Urakawa, Omihachiman, JP;
Yasutaka Sugimoto, Kyoto, JP;
Naoya Mori, Omihachiman, JP;
Yoichi Moriya, Omihachiman, JP;
Jun Urakawa, Omihachiman, JP;
Yasutaka Sugimoto, Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto-Fu, JP;
Abstract
An insulating ceramic composition forming insulating ceramic layers () stacked in a multilayer ceramic substrate () used in a monolithic ceramic electronic component, such as a multilayer ceramic module (). The insulating ceramic composition contains a first ceramic powder mainly containing forsterite, a second ceramic powder mainly containing at least one compound selected from the group consisting of CaTiO, SrTiO, and TiO, and a borosilicate glass powder. The borosilicate glass powder contains 3 to 15 percent by weight of lithium in terms of LiO, 30 to 50 percent by weight of magnesium in terms of MgO, 15 to 30 percent by weight of boron in terms of BO, 10 to 35 percent by weight of silicon in terms of SiO, 6 to 20 percent by weight of zinc in terms of ZnO, and 0 to 15 percent by weight of aluminum in terms of AlO. The insulating ceramic composition can be fired at a temperature of 1000° C. or less, and the resulting sintered compact has a low relative dielectric constant, a resonance frequency with a low temperature coefficient, and a high Q value.