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:
Aug. 05, 2003
Filed:
Dec. 05, 2001
Murata Manufacturing Co. Ltd, , JP;
Abstract
A composite multilayer ceramic electronic part includes a high dielectric-constant layer and at least one low dielectric-constant layer laminated with each other, the high dielectric-constant layer including a high dielectric-constant material and has a relative dielectric constant &egr;r of about 20 or more, and the low dielectric-constant layer including a low dielectric-constant material and has a relative dielectric constant &egr;r of about 10 or less. The high dielectric-constant material mainly comprises a BaO—TiO —ReO dielectric and a first glass composition, the BaO—TiO —ReO dielectric being represented by xBaO-yTiO -zReO , where x, y and z are % by mole and satisfy the following conditions: 8≦x≦18; 52.5≦y≦65; 20≦z≦40; and x+y+z=100; and Re is a rare earth element, and the low dielectric-constant material comprises a composite of a ceramic and a second glass composition. The composite multilayer ceramic electronic part is resistant to delamination or deformation at the interface between the different types of materials, can be fired at low temperatures and is suitable for the high-frequency applications.