Title:
【発明の名称】ノイズ抑制部品
Document Type and Number:
Japanese Patent JP3344695
Kind Code:
B2
Abstract:
A noise-suppressing component (1) includes a ring-shaped ceramic core (2) and an insulating member (3) with which the surface of the ring-shaped ceramic core (2) is coated having magnetic powder. Ceramic ferrite having an initial magnetic permeability of approximately 50 to 1500, for example, is used for the ring-shaped ceramic core (2). Resin including magnetic powder having an initial magnetic permeability of approximately 2 to 50 or rubber including the magnetic powder, for example, is used for the insulating member (3) having the magnetic powder. The insulating member (3) having the magnetic powder includes magnetic powder having an average particle diameter of approximately 1 to 1000 mu m and has a magnetic-powder content of approximately 20 to 70 percent by volume.
Inventors:
Katsuyuki Uchida
Masami Sugitani
Masami Sugitani
Application Number:
JP20275397A
Publication Date:
November 11, 2002
Filing Date:
July 29, 1997
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01F17/06; H03H1/00; (IPC1-7): H01F17/06; H01F27/33
Domestic Patent References:
| JP362607A | ||||
| JP59189609A | ||||
| JP4318906A | ||||
| JP3150815A | ||||
| JP11355091A | ||||
| JP8111335A | ||||
| JP2122410U | ||||
| JP6044488U |