The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2020
Filed:
Nov. 20, 2017
Dupont Teijin Advanced Papers (Japan), Ltd., Tokyo, JP;
Shinji Naruse, Tokyo, JP;
Tatsushi Fujimori, Tokyo, JP;
Koichi Ukigaya, Tokyo, JP;
Chihiro Kondo, Tokyo, JP;
Yasunori Tanaka, Tokyo, JP;
DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD., Tokyo, JP;
Abstract
The present invention provides an electromagnetic wave suppression sheet provided with: an absorption layer which has surface resistivity of at least 100Ω/□ and which contains an electrical conductive material and an insulating material in the state where the electrical conductive material and the insulating material are in direct contact with each other, the insulating material having a dielectric loss tangent of 0.01 or larger at a frequency of 60 Hz at 20° C.; and a contact layer which is formed on a surface, of the absorption layer, opposite to a surface to be irradiated with electromagnetic waves and of which a surface in contact with the absorption layer has surface resistivity of at least 20Ω/□.