Thermally assisted magnetic recording head and method of manufacturing the same
AssigneeHitachi, Ltd.
InventorsTakuya Matsumoto, Kimio Nakamura
Life of this patent
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Abstract
In order to prevent deterioration of floating characteristics of a slider due to deformation of a slider floating surface by thermal expansion of a coil, the followings are performed. A recessed portion is formed in a part of the slider, and a device for generating an optical near-field and the coil for generating a magnetic field are formed in the recessed portion. The optical near-field generation device is formed on a surface facing a recording medium, and the magnetic field application coil is formed on an upper surface of the recessed portion. The optical near-field generation device and the magnetic field application coil are respectively exposed to the surface.
Claims4
A head used for thermally assisted magnetic recording apparatus for recording data on a data recording medium by applying a magnetic field and an optical near-field thereto, wherein:
- said head comprises a substrate with a recessed portion formed therein, the recessed portion having a light-transmitting bottom part;
- an optical near-field generation device is formed on the surface of the recessed portion facing the data recording medium;
- a magnetic field generation device is formed on the surface of the recessed portion opposite to the surface having the optical near-field generation device;
- the optical near-field generation device is a metal element that generates plasmons;
- and
- the thickness of the recessed portion in a height direction from the surface facing the data recording medium is not more than the sum of the thickness of a coil of the magnetic field generation device and 1 μm.
Dependencies are inferred from the claim text.