Invention Grant
- Patent Title: Magnetic recording medium
- Patent Title (中): 磁记录介质
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Application No.: US10444962Application Date: 2003-05-27
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Publication No.: US07229707B2Publication Date: 2007-06-12
- Inventor: Hoon-sang Oh , Byung-kyu Lee
- Applicant: Hoon-sang Oh , Byung-kyu Lee
- Applicant Address: KR Suwon, Kyungki-do
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon, Kyungki-do
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: KR10-2002-0059780 20021001
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
A magnetic recording medium including a magnetic recording layer and a substrate that supports the magnetic recording layer is provided. At least two underlayers including a nonmetallic underlayer are placed between the magnetic recording layer and the substrate. The perpendicular magnetic recording medium uses a double-layered or tri-layered underlayer. Accordingly, a perpendicular magnetic recording layer can have a high perpendicular magnetic anisotropic energy constant Ku due to a third underlayer and have small crystal grains and a small exchange coupling due to a second underlayer below the third underlayer. Thus, the perpendicular magnetic recording layer can have a good thermal stability, high-density recording characteristics, and excellent SNR characteristics.
Public/Granted literature
- US20040072031A1 Magnetic recording medium Public/Granted day:2004-04-15
Information query
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