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, 2009
Filed:
Oct. 19, 2007
Toshiyuki Ito, Moriyama, JP;
Harunobu Sano, Kyoto, JP;
Toshiyuki Ito, Moriyama, JP;
Harunobu Sano, Kyoto, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, JP;
Abstract
A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O-based perovskite principal crystal phase containing 55 mole percent or more of SrTiOand whose powder CuKα X-ray diffraction pattern exhibits a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases being the other crystal phases to the intensity of the maximum peak of the perovskite crystal phase, which is present at 2θ=25° to 35°. This strontium titanate-based nonreducing dielectric ceramic has a high relative dielectric constant of 150 or more, a low third-order harmonic distortion ratio, and an excellent reliability in a high temperature-loading test. Accordingly, it is advantageously used for forming dielectric ceramic layers of a monolithic ceramic capacitor.