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:
May. 04, 2004
Filed:
Apr. 19, 2002
Applicant:
Inventors:
Yoshitsugu Shibuya, Toda, JP;
Eigou Hashimoto, Sakado, JP;
Junji Satoh, Kawagoe, JP;
Masahiro Satoh, Iruma, JP;
Seiichi Hiroe, Sayama, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C23C 1/414 ; C23C 1/458 ; B32B 1/501 ;
U.S. Cl.
CPC ...
C23C 1/414 ; C23C 1/458 ; B32B 1/501 ;
Abstract
A film is formed on the surface of a soft metal portion ( ) such that the film contains phosphorus and either platinum or palladium, and further, at least one element having homogeneous solubility with platinum or palladium, with the content of the phosphorus being in a range of about 15 to 25 atomic %, or contains boron and iron with the content of the boron being in a range of from about 15 to 25 atomic %. Thus, a soft metal is made up by turning the film into a hard layer ( ) made of an amorphous alloy.