Invention Grant
- Patent Title: Compact inductor and a method for manufacturing the same
- Patent Title (中): 紧凑型电感器及其制造方法
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Application No.: US12691959Application Date: 2010-01-22
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Publication No.: US08054151B2Publication Date: 2011-11-08
- Inventor: Nobuyuki Kobayashi , Kazuyuki Mizuno , Natsumi Shimogawa , Shuichi Ozawa
- Applicant: Nobuyuki Kobayashi , Kazuyuki Mizuno , Natsumi Shimogawa , Shuichi Ozawa
- Applicant Address: JP Nagoya
- Assignee: NGK Insulators, Ltd.
- Current Assignee: NGK Insulators, Ltd.
- Current Assignee Address: JP Nagoya
- Agency: Burr & Brown
- Priority: JP2009-012145 20090122; JP2010-011324 20100121
- Main IPC: H01F27/02
- IPC: H01F27/02

Abstract:
A compact inductor comprises a coil, a coil-burying body, and a body for a closed magnetic circuit. The coil-burying body is a fired porous ceramic body having a first magnetic permeability, in which the coil is buried. In the coil-burying body, “a through-hole 12a passing through inside of the coil along an axis of the coil” is formed. The body for a closed magnetic circuit is a fired dense ceramic body having a second magnetic permeability greater than the first magnetic permeability. The body for a closed magnetic circuit is arranged closely/densely at an outer circumference portion of the coil-burying body and in the through-hole. A magnetic path is therefore formed mainly within the body for a closed magnetic circuit, and the magnetic flux density is reduced in an area close to the coil. Accordingly, an inductor having the excellent superimposed DC current characteristic is provided.
Public/Granted literature
- US20100194511A1 COMPACT INDUCTOR AND A METHOD FOR MANUFACTURING THE SAME Public/Granted day:2010-08-05
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