US 12,410,509 B2
Copper-coated aluminum wire material and production method therefor
Akihiro Kikuchi, Tsukuba (JP); Hitoshi Kitaguchi, Tsukuba (JP); Yasuo Iijima, Tsukuba (JP); and Kazuto Hirata, Tsukuba (JP)
Assigned to NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Ibaraki (JP)
Appl. No. 18/275,775
Filed by NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba (JP)
PCT Filed Feb. 28, 2022, PCT No. PCT/JP2022/008429
§ 371(c)(1), (2) Date Aug. 3, 2023,
PCT Pub. No. WO2022/190942, PCT Pub. Date Sep. 15, 2022.
Claims priority of application No. 2021-040009 (JP), filed on Mar. 12, 2021.
Prior Publication US 2024/0117483 A1, Apr. 11, 2024
Int. Cl. C23C 14/16 (2006.01); B21C 37/04 (2006.01); B32B 1/00 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/20 (2006.01); C23C 14/02 (2006.01); C23C 14/30 (2006.01); C23C 14/32 (2006.01); C23C 14/56 (2006.01); C23C 14/58 (2006.01); C23C 16/54 (2006.01); C23C 28/00 (2006.01); C23C 28/02 (2006.01); C23C 30/00 (2006.01); H01B 1/02 (2006.01); B21C 1/04 (2006.01)
CPC C23C 14/16 (2013.01) [B21C 37/042 (2013.01); B32B 1/00 (2013.01); B32B 15/017 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/20 (2013.01); C23C 14/022 (2013.01); C23C 14/165 (2013.01); C23C 14/30 (2013.01); C23C 14/32 (2013.01); C23C 14/562 (2013.01); C23C 14/5806 (2013.01); C23C 14/5886 (2013.01); C23C 16/545 (2013.01); C23C 28/02 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/322 (2013.01); C23C 28/345 (2013.01); C23C 30/005 (2013.01); H01B 1/02 (2013.01); H01B 1/023 (2013.01); H01B 1/026 (2013.01); B21C 1/04 (2013.01); C23C 30/00 (2013.01); Y10T 428/1275 (2015.01); Y10T 428/12903 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A copper-coated aluminum wire material comprising:
an aluminum wire material made of aluminum or an aluminum alloy; and
a copper thin film coating the aluminum wire material, wherein
a space factor of the copper thin film is in a range of 0.2% or more to 4% or less, and
an adhesiveness between the aluminum wire material and the copper thin film according to a scratch test conforming to JIS R 3255 satisfies 10 mN or more.