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. 20, 2007
Filed:
Jan. 21, 2004
Sudhir S. Malhotra, Fremont, CA (US);
Gerardo Bertero, Redwood City, CA (US);
Ching Tsoi, Cupertino, CA (US);
Donald Stafford, San Jose, CA (US);
Sudhir S. Malhotra, Fremont, CA (US);
Gerardo Bertero, Redwood City, CA (US);
Ching Tsoi, Cupertino, CA (US);
Donald Stafford, San Jose, CA (US);
Komag, Inc., San Jose, CA (US);
Abstract
A magnetic recording medium constructed in accordance with the invention comprises a substrate, first, second and third underlayers formed over the substrate, and a magnetic data recording layer formed over the underlayers. The underlayers typically have a bcc crystal structure, and comprise Cr or Cr alloys. The magnetic data recording layer has a hcp crystal structure and comprises a Co alloy. The second underlayer typically comprises a material such as B, which tends to reduce the crystal size of the second underlayer and the layers deposited thereon, and also to increase crystal spacing.