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. 21, 1991
Filed:
Sep. 26, 1989
Motohiro Nabae, Nikko, JP;
Kunihiko Kishino, Nikko, JP;
Furukawa Aluminum Co., Ltd., Tokyo, JP;
Abstract
An aluminum alloy for magnetic disc substrate excellent in platability is disclosed, which is characterized in that not less than 0.010 wt. % and under 0.03 wt. % of Cu, not less than 2 wt. % and not more than 6 wt. % of Mg and not less than 0.05 wt. % and not more than 2.0 wt. % of Zn are contained, further one or more of over 0.01 wt. % and under 0.05 wt. % of Mn and over 0.01 wt. % and under 0.05 wt. % of Cr are contained, and, as impurity elements, Si, Fe, Ti and other individual unavoidable element are regulated to be not more than 0.1 wt. %, not more than 0.1 wt. %, not more than 0.02 wt. % and not more than 0.02 wt. %, respectively. Zr may be contained additionally in amounts of not less than 0.005 wt. % and under 0.05 wt. %.