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:
Nov. 08, 2016
Filed:
Dec. 12, 2013
Murata Manufacturing Co., Ltd., Kyoto, JP;
Atsushi Yamamoto, Kyoto, JP;
Akihiro Nakamura, Kyoto, JP;
Yuko Fujita, Kyoto, JP;
Tomoyuki Ankyu, Kyoto, JP;
Osamu Naito, Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A laminated coil component includes a magnetic body part made of a Ni—Zn-based ferrite material and a coil conductor containing Cu as a main component, which is wound into a coil shape, and the coil conductor is embedded in the magnetic body part to form a component base. The component base is divided into a first region near the coil conductor and a second region other than the first region. The grain size ratio of the average crystal grain size of the magnetic body part in the first region to the average crystal grain size of the magnetic body part in the second region is 0.85 or less. The molar content of CuO in the ferrite raw material is set to 6 mol % or less, and firing is performed in a reducing atmosphere in which the oxygen partial pressure is an equilibrium oxygen partial pressure of Cu—CuO or less.