Measurement of a reversed side shield magnetization condition
AssigneeSeagate Technology LLC
InventorsZhe Shen, Zuxuan Lin, Lei Lu, Jian Zhong
Life of this patent
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Abstract
A method that includes supplying a predetermined signal to a write head having side shields. The method also includes performing, by the write head, a recording operation on a surface of a data storage medium, when the predetermined signal is supplied to the write head, to provide a recorded magnetization pattern. The method further includes carrying out measurements on a portion of the recorded magnetization pattern influenced by a magnetization of the side shields. The measurements are employed to determine whether a reversed side shield magnetization condition is present in the write head.
Claims20
A method comprising:
- supplying, by a controller, a predetermined signal to a write head having side shields;
- when the predetermined signal is supplied to the write head, performing, by the write head, a recording operation on a surface of a data storage medium to provide a recorded magnetization pattern;
- carrying out measurements on a portion of the recorded magnetization pattern influenced by a magnetization of the side shields;
- and
- determining whether a reversed side shield magnetization condition is present in the write head from the measurements.
A data storage device comprising:
- a data storage medium;
- a write head having side shields;
- a controller operably coupled to the data storage medium and the write head, the controller is configured to:
- direct the write head to record a test magnetization pattern on the data storage medium;
- carry out measurements on a portion of the recorded test magnetization pattern influenced by a magnetization of the side shields;
- and
- determine whether a reversed side shield magnetization condition is present in the write head from the measurements.
A method comprising:
- writing, by a write head having side shields, a test magnetization pattern on a data storage medium;
- carrying out measurements on a portion of the test magnetization pattern influenced by a magnetization of the side shields;
- and
- determining whether a reversed side shield magnetization condition is present in the write head from the measurements.
Dependencies are inferred from the claim text.