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. 03, 2007
Filed:
Nov. 23, 2004
Applicants:
Sooyoul Hong, Sunnyvale, CA (US);
Hyung Lee, Cupertino, CA (US);
Inventors:
Sooyoul Hong, Sunnyvale, CA (US);
Hyung Lee, Cupertino, CA (US);
Assignee:
Samsung Electronics Co., Ltd., Suwon, KR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B05D 5/12 (2006.01); G11B 5/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A disk for a hard disk drive. The disk includes a S1 layer of magnetic material located over a substrate, and a layer of ruthenium located over the S1 layer. The disk further includes a top layer of magnetic material and a layer of chromium located adjacent to the top magnetic layer. The chromium diffuses into the top layer of magnetic material to magnetically decouple the grains of the magnetic material. Decoupling the grains of the magnetic material reduces the magnetic noise of the disk and improves the signal to noise ratio of the hard disk drive.