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:
Jul. 08, 1997
Filed:
Jan. 22, 1996
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05H / ;
U.S. Cl.
CPC ...
427539 ; 1566431 ; 1566461 ; 427128 ; 427130 ; 427131 ; 427132 ; 427264 ; 427271 ; 427343 ; 427344 ; 427377 ; 4273881 ; 427404 ; 4274197 ; 427535 ; 427555 ; 427558 ;
Abstract
The present invention may provide a method for manufacturing a magnetic recording medium with high reliability by rendering simply a surface of a magnetic recording medium rough. A recording film of a magnetic material is formed on a nonmagnetic substrate, then a multilayered or composite protection film including first and second materials is formed on the recording film, and then selectively etching one of said first and second materials to transform a surface of the recording film into a rough surface.
Sato, Kenji. (1997). Method for manufacturing a magnetic recording member (U.S. Patent No. 5645898). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5645898
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile