Title:
ELECTROMAGNETIC WAVE ABSORBING SHEET
Document Type and Number:
WIPO Patent Application WO/2022/092137
Kind Code:
A1
Abstract:
The present disclosure addresses the problem of providing an electromagnetic wave absorbing sheet which has a wide electromagnetic wave incident angle range wherein the return loss is high. This electromagnetic wave absorbing sheet (1) is provided with a metal base material (10) and an electromagnetic wave absorbing film (20) that is formed on the metal base material (10). The electromagnetic wave absorbing film (20) contains an MTC-type ε-Fe2O3 (21), a black titanium oxide (22), a conductive filler (23) and a resin (24). The MTC-type ε-Fe2O3 (21) is a crystal which belongs to the same space group as an ε-Fe2O3 crystal, while containing Ti, Co, Fe and at least one element that is selected from the group consisting of Ga, In, Al and Rh. The ratio of the conductive filler (23) to the electromagnetic wave absorbing film (20) is from 0.1% by volume to 10% by volume.
Inventors:
KASHIHARA KEIKO
FUJIWARA REI
OHKOSHI SHIN-ICHI
NAMAI ASUKA
FUJIWARA REI
OHKOSHI SHIN-ICHI
NAMAI ASUKA
Application Number:
PCT/JP2021/039609
Publication Date:
May 05, 2022
Filing Date:
October 27, 2021
Export Citation:
Assignee:
PANASONIC CORP (JP)
UNIV TOKYO (JP)
UNIV TOKYO (JP)
International Classes:
B32B27/18; B32B7/025; B32B15/08; C01G23/04; C01G49/06; C01G51/00; H05K9/00
Domestic Patent References:
| WO2019017471A1 | 2019-01-24 |
Foreign References:
| JP2019012799A | 2019-01-24 | |||
| JP2017052659A | 2017-03-16 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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