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:
Dec. 15, 2009
Filed:
Jun. 06, 2005
Yoshihiro Ikeda, San Jose, CA (US);
Mary F. Minardi, Santa Cruz, CA (US);
Kentaro Takano, San Jose, CA (US);
Qi-fan Xiao, San Jose, CA (US);
Yoshihiro Ikeda, San Jose, CA (US);
Mary F. Minardi, Santa Cruz, CA (US);
Kentaro Takano, San Jose, CA (US);
Qi-Fan Xiao, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands, B.V., Amsterdam, NL;
Abstract
Perpendicular magnetic recording media and methods of fabricating perpendicular magnetic recording media are described. The perpendicular magnetic recording medium of one embodiment includes an interlayer, an underlayer, and a perpendicular magnetic recording layer. The interlayer is comprised of a Ni-alloy having the characteristics of being nonmagnetic and having an FCC structure. The alloying element for the Ni-alloy may comprise one of V or Cr, or may comprise one of V, Cr, or W. The concentration of the alloying element is set such that the concentration of the alloying element is high enough to make the Ni-alloy non-magnetic, while low enough to maintain an FCC structure for the Ni-alloy.