发明名称 |
Magnetic recording medium, method of manufacturing the same, and magnetic recording apparatus |
摘要 |
According to one embodiment, in a method of manufacturing a magnetic recording medium which is configured such that a ferromagnetic recording part is formed on a substrate in a desired track pattern or a desired bit pattern, a ferromagnetic film is formed on the substrate, and then a mask is formed on the ferromagnetic film, the mask having an opening above a region for isolating the ferromagnetic film between tracks or bits. Subsequently, a B-based gas is radiated on the region of the ferromagnetic film through the opening of the mask, thereby increasing a B content of the region to nonmagnetize the region. |
申请公布号 |
US8980451(B2) |
申请公布日期 |
2015.03.17 |
申请号 |
US201113185880 |
申请日期 |
2011.07.19 |
申请人 |
Kabushiki Kaisha Toshiba |
发明人 |
Kamata Yoshiyuki;Kimura Kaori;Iwasaki Takeshi |
分类号 |
G11B5/65;G11B5/82;G11B5/74;B82Y10/00;G11B5/855 |
主分类号 |
G11B5/65 |
代理机构 |
Nixon & Vanderhye, P.C. |
代理人 |
Nixon & Vanderhye, P.C. |
主权项 |
1. A magnetic recording medium comprising:
a ferromagnetic recording part formed on a discoidal substrate, the ferromagnetic recording part comprising a ferromagnetic film, a track pattern having a pattern formed of a plurality of tracks or a bit pattern having a pattern formed of a plurality of bits being formed on the ferromagnetic film, and a ferromagnetism-deactivated part formed in a region for isolating the ferromagnetic recording part between the tracks or the bits, the ferromagnetism-deactivated part having a content of implanted B set at 15 at % or more and having a height higher than a height of the ferromagnetic film, wherein a thickness of the ferromagnetism-deactivated part is greater than a thickness of the ferromagnetic recording part, and a surface asperity of the ferromagnetism-deactivated part is greater than a surface asperity of the ferromagnetic recording part. |
地址 |
Tokyo JP |