Title:
LAYERED CERAMIC ELECTRONIC PART AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2005/034151
Kind Code:
A1
Abstract:
In a low-permeability coil unit (15) composed of layered low-permeability ceramic green sheets, a first coil (La) and a plenty of holes are formed. On the other hand, in a high-permeability coil unit (16) composed of layered high-permeability ceramic green sheets, a second coil (Lb) and a small number of holes are formed. The first coil (La) and the second coil (Lb) are electrically connected in series and constitute a spiral coil (L). The coil unit (16) having the small number of holes and made of ferrite ceramics has a high permeability and a high dielectric constant while the coil unit (15) having the plenty of holes and made of ferrite ceramics has a low permeability and a low dielectric constant.
Inventors:
TAKAZAWA TOMOO (JP)
Application Number:
PCT/JP2004/012546
Publication Date:
April 14, 2005
Filing Date:
August 31, 2004
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
TAKAZAWA TOMOO (JP)
TAKAZAWA TOMOO (JP)
International Classes:
H01F17/00; H01G4/40; H03H7/075; (IPC1-7): H01F27/00; H01F17/00; H01G4/40; H03H7/075
Foreign References:
| JPH097835A | 1997-01-10 | |||
| JPH06232005A | 1994-08-19 | |||
| JPH11238613A | 1999-08-31 | |||
| JP2004297020A | 2004-10-21 | |||
| JPH11254276A | 1999-09-21 |
Attorney, Agent or Firm:
Morishita, Takekazu (Minamihommachi 4-chome Chuo-ku, Osaka-sh, Osaka 54, JP)
Download PDF:
Previous Patent: LOW TEMPERATURE SUSCEPTIBILITY COMPENSATION
Next Patent: SYSTEM AND METHOD FOR CONNECTING A REMOVABLE COIL TO FIXED COIL TERMINALS
Next Patent: SYSTEM AND METHOD FOR CONNECTING A REMOVABLE COIL TO FIXED COIL TERMINALS