Invention Grant
- Patent Title: Inductance element and method for manufacturing the same
- Patent Title (中): 电感元件及其制造方法
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Application No.: US12752746Application Date: 2010-04-01
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Publication No.: US08111124B2Publication Date: 2012-02-07
- Inventor: Akio Hagiya
- Applicant: Akio Hagiya
- Applicant Address: JP
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP
- Agency: Studebaker & Brackett PC
- Agent Tim L. Brackett, Jr.
- Priority: JP2007-258317 20071002
- Main IPC: H01F27/02
- IPC: H01F27/02 ; H01F27/29 ; H01F7/06

Abstract:
An inductance element is not interfered by peripheral circuits when mounted on a wiring board by forming a closed magnetic path. The inductance element has a small reduction of an inductance value when a direct current is superimposed, and thus has excellent direct current superimposition characteristics. The temperature coefficient of the magnetic permeability of a ferrite sintered body which constitutes a magnetic core can be positive. The temperature coefficient of the magnetic permeability of a soft magnetic resin provided as an external covering to cover a coil and to fill a space between flange sections of the magnetic core is permitted to be −30 ppm/° C. or less.
Public/Granted literature
- US20100201471A1 INDUCTANCE ELEMENT AND METHOD FOR MANUFACTURING THE SAME Public/Granted day:2010-08-12
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