Title:
NOISE SUPPRESSION SHEET
Document Type and Number:
Japanese Patent JP2019153623
Kind Code:
A
Abstract:
To provide a noise suppression sheet that can suppress noise in a high frequency band exceeding 3 GHz.SOLUTION: A noise suppression sheet 10 includes a sheet-like composite magnetic material 20. The composite magnetic material 20 includes a binder 30, and soft magnetic powder 40 dispersed in the binder 30. All of the soft magnetic powder 40 have an aspect ratio of less than 5 and a particle diameter of 300 nm or less when approximated to a true sphere. The real component of the relative magnetic permeability of the composite magnetic material 20 maintains a value greater than 1 up to a frequency band of 7 GHz or more. The imaginary component of the relative magnetic permeability of the composite magnetic body 20 maintains a value of 2 or less up to a frequency band of 6 GHz or more.SELECTED DRAWING: Figure 2
Inventors:
IGARASHI TOSHIYUKI
Application Number:
JP2018036162A
Publication Date:
September 12, 2019
Filing Date:
March 01, 2018
Export Citation:
Assignee:
TOKIN CORP
International Classes:
H01F1/28; H01F1/33; H05K9/00
Domestic Patent References:
| JP2015084409A | 2015-04-30 | |||
| JP2016111305A | 2016-06-20 | |||
| JP2011187568A | 2011-09-22 | |||
| JP2010103427A | 2010-05-06 |
Attorney, Agent or Firm:
Takuya Yamazaki
Takeshi Matsumoto
Watanabe Hisanori
Takeshi Matsumoto
Watanabe Hisanori