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:
May. 31, 2005
Filed:
Feb. 12, 2002
Gerardo Bertero, Redwood City, CA (US);
Sudhir Malhotra, Fremont, CA (US);
David Wachenschwanz, Saratoga, CA (US);
Zhengsheng Shan, Fremont, CA (US);
Donald Stafford, Fremont, CA (US);
Gerardo Bertero, Redwood City, CA (US);
Sudhir Malhotra, Fremont, CA (US);
David Wachenschwanz, Saratoga, CA (US);
Zhengsheng Shan, Fremont, CA (US);
Donald Stafford, Fremont, CA (US);
Komag, Inc., San Jose, CA (US);
Abstract
A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes antiferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.