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. 18, 2003
Filed:
Apr. 17, 2000
Li-Lien Lee, San Jose, CA (US);
David N. Lambeth, Pittsburgh, PA (US);
David E. Laughlin, Pittsburgh, PA (US);
Byung-Ki Cheong, Seoul, KR;
Carnegie Mellon University, Pittsburgh, PA (US);
Abstract
The present invention provides a longitudinal magnetic recording media having a substrate, optionally, a sputter deposited MgO seed layer, a Co or Co alloy based magnetic layer and an underlayer disposed between the substrate and the magnetic layer comprised of a material having a body centered cubic derivative ordered crystalline structure, preferably a B2, DO or L2 structure. The material may be for example, NiAl, FeAl or Mn Si. A thin Cr or Cr alloy intermediate layer of about 1.0 nm to 5.0 nm thick may be positioned between the underlayer and the magnetic layer.