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:
Jul. 14, 2015
Filed:
Sep. 15, 2008
Xiaoping Bian, Saratoga, CA (US);
Jyh-kau Chang, Fremont, CA (US);
Weikang Shen, San Jose, CA (US);
Zhupei Shi, San Jose, CA (US);
Kai Tang, San Jose, CA (US);
Xiaoping Bian, Saratoga, CA (US);
Jyh-Kau Chang, Fremont, CA (US);
Weikang Shen, San Jose, CA (US);
Zhupei Shi, San Jose, CA (US);
Kai Tang, San Jose, CA (US);
HGST NETHERLANDS B.V., Amsterdam, NL;
Abstract
Perpendicular magnetic recording media has been enhanced by controlling the initial growth of magnetic oxide layers and increased magnetic isolation between the grains in the initial magnetic layer. An onset magnetic oxide layer is sputter deposited in an argon-oxygen gas mixture between the main CoPtCr-oxide magnetic layers and the underlying Ru layer. The insertion of the onset magnetic oxide layer enhances the coercivity of the oxide magnetic layers and also improves the nucleation field. The media signal-to-noise ratio and bit error rate also are significantly improved due to the improvement of the initial segregation of Co magnetic grains in the magnetic oxide layers.