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. 17, 2009
Filed:
Aug. 12, 2005
Hoa Van DO, Fremont, CA (US);
Bernd Heinz, San Jose, CA (US);
Yoshihiro Ikeda, San Jose, CA (US);
Kentaro Takano, San Jose, CA (US);
Min Xiao, Los Gatos, CA (US);
Hoa Van Do, Fremont, CA (US);
Bernd Heinz, San Jose, CA (US);
Yoshihiro Ikeda, San Jose, CA (US);
Kentaro Takano, San Jose, CA (US);
Min Xiao, Los Gatos, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A perpendicular magnetic recording disk has a granular Co-based ferromagnetic alloy recording layer (RL) with oxides of a selected metal (Ta or Nb) and a reduced-thickness exchange-break layer (EBL) between the RL and the soft magnetic underlayer (SUL). A perpendicular magnetic recording system that includes the disk, the write head and the read head, has an improved ability to write to the RL because of the reduced-thickness EBL.