Thermally assisted magnetic recording head and method of manufacturing the same
a technology of magnetic recording head and heating coil, which is applied in the field of thermally assisted magnetic recording head, can solve the problems of difficult to realize the floating quantity of less than 1tb/in, difficult to transmit heat of the coil to the medium, etc., and achieves the effect of improving the heat dissipation of the coil, strengthening the magnetic field, and easy transmission
Inactive Publication Date: 2006-10-05
HITACHI LTD
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- Abstract
- Description
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- Application Information
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Benefits of technology
The present invention relates to a head for thermally assisted magnetic recording. The technical effect of the invention is to reduce the effects of heat generation of the coil in the head. This is achieved by forming a recessed portion in the slider, where the optical near-field generation device and the magnetic field application coil are located. The recessed portion has an optical transparent material, which allows incident light to enter from the upper surface of the recessed portion. The heat generated by the coil is transmitted to the medium through the recessed portion, and the thinned-out portion of the recessed portion has a high optical transparency, which reduces the effects on the floating quantity of the slider. The substrate of the slider can be made of two layers of different materials, and a magnetic pole made of soft magnetic material can be arranged in the inside of the coil to strengthen the magnetic field. A heatsink layer can be provided on the upper surface of the recessed portion to dissipate the heat generated by the coil and reduce the temperature. Overall, the invention reduces the effects of heat generation of the coil and improves the performance of the thermally assisted magnetic recording head.
Problems solved by technology
However, such a deformation deteriorates the floating characteristics, causing it very difficult to realize the floating quantity of less than 1Tb / in2.
Because the slider exists in the space between the coil and the medium, the heat of the coil is hard to be transmitted to the medium.
Method used
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[0033] In the head for the thermally assisted magnetic recording apparatus of the present invention, as shown in FIG. 1, a recessed portion 10 is formed in a part of a slider 1 which is the matrix of a head, and a device 2 to generate the optical near-field and the coil 3 to generate the magnetic field are formed on the recessed portion. The optical near-field generation device 2 is formed on the surface facing a recording medium 7 and the magnetic field application coil 3 is formed as embedded in the upper surface of the recessed portion. Herein, the upper surface of the recessed portion means the inside of the thinned-out portion of the recessed portion, the underside surface of a surface 5 facing the recording medium 7. Each of the optical near-field generation device 2 and the magnetic field application coil 3 is exposed to the surface. The thinned-out portion of the recessed portion 10 comprises a material having an optical transparency, and an incident light 6 is made enter fr...
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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.
Description
CLAIM OF PRIORITY [0001] The present application claims priority from Japanese application JP 2005-108835 filed on Apr. 5, 2005, the content of which is hereby incorporated by reference into this application. FIELD OF THE INVENTION [0002] The present invention relates to a thermally assisted magnetic recording head and a method of manufacturing the same. BACKGROUND OF THE INVENTION [0003] In the recent years, a thermally assisted magnetic recording method has been proposed as a recording method to realize a recording density of not less than 1Tb / in2 (H. Saga, H. Nemoto, H. Sukeda, and M. Takahashi, Jpn. J. Appl. Phys. 38, Part 1, 1839 (1999)). With conventional magnetic recording apparatuses, when the recording density is not less than 1Tb / in2, there is a problem of disappearance of recorded data due to a thermal fluctuation. It is necessary to increase coercivity of a medium in order to prevent the disappearance; however, because there is a limit in the magnitude of magnetic field ...
Claims
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IPC IPC(8): G11B5/02
CPCG11B2005/0021G11B5/6005G11B5/314G11B5/6088
Inventor MATSUMOTO, TAKUYANAKAMURA, KIMIO
Owner HITACHI LTD