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:
Feb. 18, 1997
Filed:
Nov. 10, 1993
Haruki Yamane, Tokyo, JP;
Masanobu Kobayashi, Tokyo, JP;
Yoshinori Maeno, Tokyo, JP;
Kayoko Sato, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A magnetic recording medium having a substrate, and an artificial superlattice deposited on the substrate as a vertical magnetization film. The artificial superlattice is a Co/Pt artificial superlattice which is composed of alternate Co and Pt layers deposited on the substrate. The magnetic recording medium is fabricated by the steps of: disposing a Co target and a Pt or Pd target separating from a substrate; performing an RF sputtering to the substrate by alternately facing the substrate with the Co target and the Pt or Pd target by means of periodical movement of the substrate, thereby forming a Co/Pt or Co/Pd artificial superlattice) on the substrate; and performing heat treatment to the Co/Pt or Co/Pd artificial superlattice at a temperature T in the range of 200.degree. C. to 450.degree. C. inclusive.