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:
Sep. 03, 1985
Filed:
Oct. 11, 1983
Applicant:
Inventor:
Kenji Yazawa, Yokohama, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428621 ; 360134 ; 360135 ; 360136 ; 427131 ; 427132 ; 428216 ; 428336 ; 428161 ; 428209 ; 428693 ; 428694 ; 428900 ; 428928 ; 428678 ;
Abstract
A magnetic recording medium is disclosed which includes a non-magnetic substrate, a first layer made of bismuth formed on the substrate in a discontinuous island shape, and a ferromagnetic metal layer formed over the first layer and the substrates and also a magnetic recording medium is disclosed which includes a non-magnetic substrate, a first layer formed continuously covering the substrate made of amorphous silicon and/or silicon compound, a second layer made of bismuth formed on the substrate in a discontinuous island shape and a ferromagnetic metal layer formed over the first and second layers.