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:
Oct. 13, 2009
Filed:
Oct. 27, 2005
Chee-kheng Lim, Suwon-si, KR;
Yong-su Kim, Seoul, KR;
Byung-kyu Lee, Seoul, KR;
Hoon-sang OH, Seongnam-si, KR;
Tae-hyo Lee, Cheonan-si, KR;
Chee-kheng Lim, Suwon-si, KR;
Yong-su Kim, Seoul, KR;
Byung-kyu Lee, Seoul, KR;
Hoon-sang Oh, Seongnam-si, KR;
Tae-hyo Lee, Cheonan-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A recording medium including a perpendicular magnetic recording layer and a laminated SUL formed on a substrate is provided. The SUL includes an antiferromagnetic layer interposed between laminated structures including a magnetic layer, a non-magnetic layer and a magnetic layer. The layers may each have a thickness of 20 nm or less and the layers below the antiferromagnetic layer may be thinner than the layers on the antiferromagnetic layer. The laminated structures formed on and below the antiferromagnetic layer have unidirectional magnetic anisotropies set in the opposite radial direction to each other by an exchange bias. As a result, media magnetic domain noise can be diminished.