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:
Jun. 02, 1998
Filed:
Mar. 31, 1997
Applicant:
Inventor:
Ryoichi Mukai, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427130 ; 427131 ; 427132 ; 427294 ; 4273831 ; 4273984 ; 427404 ;
Abstract
The present invention discloses a production process for a hard disk magnetic recording medium in which post-annealing is performed after vacuum deposition of a non-magnetic base layer and magnetic metal polycrystalline layer on a substrate without forming a protective layer and without destroying the vacuum.