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. 05, 2001
Filed:
Nov. 10, 1998
Xing Song, Mountain View, CA (US);
Qixu Chen, Milpitas, CA (US);
Charles Leu, Fremont, CA (US);
Rajiv Yadav Ranjan, San Jose, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
High areal density magnetic recording media are formed with a thin CoCrTaO,intermediate layer which provides appropriate crystalline orientation and surface morphology for the nucleation and growth of a magnetic layer thereon having increased coercivity and high squareness, while avoiding high substrate heating temperatures. Embodiments include sputter depositing an intermediate layer comprising Co, about 10 to about 20 atomic % Cr and about 1 to about 6 atomic % Ta, at a thickness of about 1.5 to about 18 Å on a Cr or Cr alloy underlayer, allowing partial oxidation of the surface of the intermediate layer by residual oxygen in the sputtering system, and then sputter depositing a CoCrPtTa magnetic alloy layer thereon.