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:
Sep. 24, 2013
Filed:
Jan. 11, 2011
Yosuke Hirata, Nagaokakyo, JP;
Hideaki Tsuji, Nagaokakyo, JP;
Nagato Omori, Nagaokakyo, JP;
Hiroyuki Wada, Nagaokakyo, JP;
Takashi Hiramatsu, Nagaokakyo, JP;
Yoshito Saito, Nagaokakyo, JP;
Yosuke Hirata, Nagaokakyo, JP;
Hideaki Tsuji, Nagaokakyo, JP;
Nagato Omori, Nagaokakyo, JP;
Hiroyuki Wada, Nagaokakyo, JP;
Takashi Hiramatsu, Nagaokakyo, JP;
Yoshito Saito, Nagaokakyo, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-Shi, Kyoto-fu, JP;
Abstract
Changes in states giving rise to electrode breakage and ball formation are made less likely during firing step for sintering the laminated body, and the improvement in DC bias characteristics is achieved in laminated ceramic electronic components with a laminated body which has internal electrodes, even when ceramic layers and the internal electrodes are reduced in thickness. The laminated body is divided into a large grain region in which the ceramic has a relatively large grain diameter and a small grain region in which the ceramic has a relatively small grain diameter. The large grain region is located outside the small grain region, and a boundary surface between the large grain region and the small grain region is located inside the outer surface of the laminated body while surrounding a section in which the internal electrodes are present in the laminated body. In order to obtain the laminated body, a heat treatment is carried out in the firing step with a temperature profile in which the average rate of temperature increase from room temperature to the maximum temperature is 40° C./second or more.