US 12,134,807 B2
Magnesium-lithium alloy member, manufacturing method thereof, optical apparatus, imaging apparatus, electronic apparatus and mobile object
Jun-ichi Sakamoto, Yokohama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 23, 2021, as Appl. No. 17/482,828.
Application 17/482,828 is a continuation of application No. 16/708,828, filed on Dec. 10, 2019, granted, now 11,180,832.
Claims priority of application No. 2018-235922 (JP), filed on Dec. 17, 2018; and application No. 2019-218402 (JP), filed on Dec. 2, 2019.
Prior Publication US 2022/0010412 A1, Jan. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C22C 23/00 (2006.01); C23F 1/22 (2006.01); C25D 11/30 (2006.01)
CPC C22C 23/00 (2013.01) [C23F 1/22 (2013.01); C25D 11/30 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An alloy member comprising:
a substrate containing Mg and Li; and
a coating film disposed on the substrate,
wherein the coating film contains magnesium, lithium, and fluorine, and
wherein when a fluorine content is represented by M1 atom % and a sum of contents of magnesium and lithium is represented by M2 atom %, a region where M1 is two times or more M2 is formed up to a location 10 μm deep from a surface of the coating film facing away from the substrate in a thickness direction of the coating film.