Invention Grant
- Patent Title: Perpendicular magnetic recording media having an extremely low Hk layer
-
Application No.: US15226830Application Date: 2016-08-02
-
Publication No.: US09966095B2Publication Date: 2018-05-08
- Inventor: Shun Tonooka , Masayoshi Shimizu , Maki Maeda , Kiwamu Tanahashi
- Applicant: HGST Netherlands B.V.
- Applicant Address: US CA San Jose
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: US CA San Jose
- Agency: Foley & Lardner LLP
- Main IPC: G11B5/66
- IPC: G11B5/66 ; G11B5/39

Abstract:
A magnetic media for magnetic data recording having reduced signal noise. The magnetic media includes a magnetic recording layer that has first, second and third portions. The first portion at the bottom of the magnetic recording layer includes an oxide and has a high anisotropy field. The third portion, located at the top of the magnetic recording layer has a low anisotropy field and does not include an oxide. The second portion, located between the first and third portions has an anisotropy field that is between that of the first and third magnetic portions. The second portion includes a thin layer of a material that has an extremely low anisotropy field that is located within a material having a higher magnetic anisotropy.
Public/Granted literature
- US20180040345A1 PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING AN EXTREMELY LOW HK LAYER Public/Granted day:2018-02-08
Information query
IPC分类: