US 12,142,834 B2
Radio wave absorber
Hirokazu Hashimoto, Minami-ashigara (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Nov. 4, 2021, as Appl. No. 17/518,889.
Application 17/518,889 is a continuation of application No. PCT/JP2020/018621, filed on May 8, 2020.
Claims priority of application No. 2019-091322 (JP), filed on May 14, 2019.
Prior Publication US 2022/0059946 A1, Feb. 24, 2022
Int. Cl. H01Q 17/00 (2006.01); C01G 49/00 (2006.01); H01F 1/34 (2006.01)
CPC H01Q 17/004 (2013.01) [C01G 49/0045 (2013.01); H01F 1/348 (2013.01); C01P 2006/42 (2013.01)] 20 Claims
 
1. A radio wave absorber comprising:
a magnetic powder; and
a binder,
wherein a volume filling rate of the magnetic powder in the radio wave absorber is 35% by volume or less, and
a volume filling rate of a carbon component in the radio wave absorber is 0% by volume or more and 2.0% by volume or less.