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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.:

US 12460284 B1

PDFFull Text
Date of Patent:
Nov. 04, 2025

Filed:

Mar. 30, 2022

Flexible stainless steel foil and flexible light emitting device

Applicant:

Nippon Steel Chemical & Material Co., Ltd., Tokyo, JP;

Inventors:

Keiichi Kimura, Tokyo, JP;

Yuuki Yoshida, Tokyo, JP;

Takuya Hiraga, Tokyo, JP;

Masahiro Fukuda, Tokyo, JP;

Yuji Kuma, Tokyo, JP;

Assignee:

NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Katherine A Christy

Int. Cl.
CPC ...
C22C 38/58 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/40 (2006.01); F21V 21/14 (2006.01);
U.S. Cl.
CPC ...
C22C 38/58 (2013.01); B32B 15/04 (2013.01); B32B 15/18 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/40 (2013.01); F21V 21/14 (2013.01); B32B 2307/538 (2013.01); B32B 2307/54 (2013.01); B32B 2307/546 (2013.01); B32B 2311/30 (2013.01); B32B 2457/20 (2013.01);
Abstract

Stainless steel foil with improved durability to repeated bending under the extreme bending conditions demanded of foldable displays and rollable displays. This stainless steel foil is flexible stainless steel foil comprising rolled stainless steel foil with a thickness of 0.1 mm or less, having a tensile strength of 1,800 MPa or more, and having a maximum height roughness of Rz of 0.35 μm or less obtained from a roughness curve of the stainless steel foil surface as measured in the same direction as a tensile direction.

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