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:
Dec. 31, 2024
Filed:
Nov. 11, 2020
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Assignee:
TORAY INDUSTRIES, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 9/00 (2006.01); B32B 7/025 (2019.01); B32B 7/12 (2006.01); B32B 25/04 (2006.01); B32B 25/16 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01);
U.S. Cl.
CPC ...
H05K 9/0088 (2013.01); B32B 7/025 (2019.01); B32B 7/12 (2013.01); B32B 25/042 (2013.01); B32B 25/16 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 2250/42 (2013.01); B32B 2264/108 (2013.01); B32B 2307/202 (2013.01); B32B 2307/212 (2013.01); B32B 2307/732 (2013.01); H05K 9/0083 (2013.01);
Abstract
The present invention aims to provide a multi-layer sheet with excellent electromagnetic wave shielding properties. The multi-layer sheet includes an alternating multilayer unit with five or more A layer and B layer alternately laminated, in which the electromagnetic return loss at the peak top in the peak of return loss spectrum with the highest return loss at the peak top is 5 dB or more in a chart of the return loss in the multi-layer sheet.