| 发明名称 | Method of fabricating graded media | ||
| 摘要 | A magnetic data storage medium comprising: an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy, wherein the coercivity or anisotropy is at a minimum substantially at one side of the magnetic recording layer, and having substantial portion of maximum coercivity or anisotropy at the other side of the magnetic recording layer. Also, a method of fabricating a magnetic data storage medium is included. | ||
| 申请公布号 | US8900730(B2) | 申请公布日期 | 2014.12.02 |
| 申请号 | US201213982987 | 申请日期 | 2012.01.31 |
| 申请人 | International Business Machines Corporation | 发明人 | Bhatia Charanjit Singh;Pandey Koashal Kishor Mani;Gaur Nikita;Maurer Siegfried L.;Nunes Ronald W. |
| 分类号 | G11B5/66;G11B5/64;G11B5/65 | 主分类号 | G11B5/66 |
| 代理机构 | Tutunjian & Bitetto, P.C. | 代理人 | Tutunjian & Bitetto, P.C. ;Percello Louis |
| 主权项 | 1. A magnetic data storage medium comprising: an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy, wherein the coercivity or anisotropy is at a minimum substantially at one side of the magnetic recording layer, and having a substantial portion of maximum coercivity or anisotropy at the other side of the magnetic recording layer; and an ion-doped overcoat, wherein the continuous grading of coercivity or anisotropy has a relatively sharp gradient profile at an interface of overcoat and the recording layer, wherein an ion density is at a maximum substantially at the interface and has a continuous grading of ion density between the overcoat and the recording layer, and wherein the coercivity is a minimum substantially at the interface. | ||
| 地址 | Armonk NY US | ||