| 发明名称 |
Scissor magnetic read head with wrap-around magnetic shield |
| 摘要 |
A magnetic scissor type magnetic read head having magnetic side shielding for reduced effective track width and having side biasing for improved stability. The read head includes first and magnetic side shields that each include first and second magnetic layers and an anti-parallel exchange coupling layer sandwiched there-between. The magnetic layers of the side shields are anti-parallel coupled with one another such that one of the magnetic layers has its magnetization oriented in a first direction parallel with the air bearing surface and the second magnetic layer has its magnetization oriented in a second direction that is opposite to the first direction and also parallel with the air bearing surface. These magnetizations of the first and second magnetic layers provide a bias field that stabilizes the magnetization of the free magnetic layers of the sensor stack to prevent flipping of the magnetizations of these layers. |
| 申请公布号 |
US8749926(B1) |
申请公布日期 |
2014.06.10 |
| 申请号 |
US201213691525 |
申请日期 |
2012.11.30 |
| 申请人 |
HGST Netherlands B.V. |
发明人 |
Le Quang;Liao Simon H.;Liu Guangli;Maat Stefan;Dang Xiaozhong;Seagle David J.;Van Der Heijden Petrus A. |
| 分类号 |
G11B5/39 |
主分类号 |
G11B5/39 |
| 代理机构 |
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代理人 |
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| 主权项 |
1. A magnetic read sensor, comprising:
a sensor stack that includes first and second magnetic free layers that are anti-parallel coupled across a non-magnetic layer sandwiched there-between; a magnetic side shield structure formed at a side of the sensor stack; and a non-magnetic, electrically insulating layer separating the magnetic side shield structure from the sensor stack; wherein: the magnetic side shield structure further comprises a first and second magnetic layers and an exchange coupling layer sandwiched between the first and second magnetic layers; the magnetic layers are anti-parallel coupled with one another across the exchange coupling layer; the first magnetic layer is laterally aligned with the first magnetic free layer of the sensor stack and provides a magnetic bias field in a first direction parallel with an air bearing surface; and the second magnetic layer is laterally aligned with the second magnetic free layer of the sensor stack and provides a magnetic bias field in a second direction that is opposite to the first direction.
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| 地址 |
Amsterdam NL |
