	US 12,460,284 B2
	Flexible stainless steel foil and flexible light emitting device
Keiichi Kimura, Tokyo (JP); Yuuki Yoshida, Tokyo (JP); Takuya Hiraga, Tokyo (JP); Masahiro Fukuda, Tokyo (JP); and Yuji Kuma, Tokyo (JP)
Assigned to NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo (JP)
Appl. No. 18/284,260
Filed by NIPPON STEEL Chemical & Material Co., Ltd., Tokyo (JP)
PCT Filed Mar. 30, 2022, PCT No. PCT/JP2022/016116 § 371(c)(1), (2) Date Sep. 26, 2023, PCT Pub. No. WO2022/210918, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-060087 (JP), filed on Mar. 31, 2021.
Prior Publication US 2024/0150880 A1, May 9, 2024
Int. Cl. 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)

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)]

15 Claims

1. A flexible stainless steel foil comprising rolled stainless steel foil with a thickness of 0.05 mm or less having a tensile strength of 1,800 MPa or more and a maximum height roughness Rz of 0.35 μm or less obtained from a roughness curve of the stainless steel foil surface measured in the same direction as a tensile direction, wherein, a ratio of a maximum valley depth Rv to the Rz (Rv/Rz) is 0.6 or less, and an elongation at break at the time of measurement of the tensile strength is 1% or more and 2% or less.