US Patent No. 11,032,955

FERRITE POWDER, RESIN COMPOSITION, ELECTROMAGNETIC SHIELDING MATERIAL, ELECTRONIC CIRCUIT SUBSTRATE, ELECTRONIC CIRCUIT COMPONENT, AND ELECTRONIC DEVICE HOUSING


Patent No. 11,032,955
Issue Date June 08, 2021
Title Ferrite Powder, Resin Composition, Electromagnetic Shielding Material, Electronic Circuit Substrate, Electronic Circuit Component, And Electronic Device Housing
Inventorship Koji Aga, Chiba (JP)
Tetsuya Igarashi, Chiba (JP)
Assignee POWDERTECH CO., LTD., Chiba (JP)

Claim of US Patent No. 11,032,955

1. A powdered ferrite comprising platy ferrite particles having a spinel crystal structure,wherein the powdered ferrite comprises at least 50 number % platy ferrite particles each having at least one protrusion on a surface of the particle, and the at least one protrusion has a shape selected from the group consisting of a rectangular pyramid, a truncated rectangular pyramid, an elongated rectangular pyramid, and combinations thereof.