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:
Nov. 03, 1998
Filed:
May. 19, 1997
Takashi Hikosaka, Tokyo, JP;
Tsutomu Tanaka, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A magnetic recording medium of this invention includes an underlayer formed on a substrate and made of a material containing vanadium as a main constituent, and a magnetic film formed on the underlayer and made of a CoPtO-based alloy. Another magnetic recording medium of this invention includes a first underlayer formed on a substrate and made of a crystal having a crystal structure for forming a body-centered cubic lattice, a second underlayer formed on the first underlayer and made of an amorphous material, and a magnetic film formed on the second underlayer and made of a CoPtO-based alloy. Further, the magnetic recording medium according to the present invention includes an underlayer formed on a substrate, a plurality of magnetic films laminated on the underlayer and interlayers provided respectively between the plurality of magnetic films, in which the underlayer and the interlayers are made of vanadium or an alloy mainly containing vanadium.