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Magnetic recording head and disk drive with the same

A technology of magnetic recording head and recording layer, which is applied in the directions of magnetic recording head, arrangement/installation of recording head, magnetic recording, etc., and can solve the problems of slow peripheral speed, difficulty in obtaining S/N ratio, and long moving time, etc.

Inactive Publication Date: 2015-04-29
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, the distance between the element and the magnetic pole and the peripheral speed are different at the inner peripheral position, the middle peripheral position and the outer peripheral position of the magnetic disk, so it is difficult to obtain the optimal medium moving time at all radial positions, that is, Best recording signal S / N ratio
For example, at the inner peripheral position, the distance between the element and the magnetic pole is longer and the peripheral speed is slower, so the medium moving time ((distance between the element and the magnetic pole) / circumferential speed) becomes longer compared with the medium moving time at the middle peripheral position, Difficult to get the best S / N ratio

Method used

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  • Magnetic recording head and disk drive with the same
  • Magnetic recording head and disk drive with the same
  • Magnetic recording head and disk drive with the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ）

[0034] figure 1 The top cover of the HDD according to the first embodiment is removed to show the internal structure, figure 2 Indicates a head in a levitating state. Such as figure 1 As shown, the HDD includes a housing 10 . The frame body 10 includes: a rectangular box-shaped base body 12 with an open upper surface; and a rectangular plate-shaped top cover (not shown). The top cover is screwed relative to the base body 12 through a plurality of screws, and closes the upper end opening of the base body 12 . The base body 12 has a rectangular bottom wall 12a and side walls 12b erected along the periphery of the bottom wall.

[0035] On the bottom wall 12a of the base body 12, a magnetic disk 16 as a recording medium and a mechanism are provided. The mechanism unit includes: a spindle motor 18 for supporting and rotating the magnetic disk 16; a plurality of, for example, two magnetic heads 33 for recording and reproducing information on the magnetic disk 16; assembly 14;...

no. 2 Embodiment approach ）

[0075] Figure 17 In the HDD according to the second embodiment, the positional relationship between the main magnetic pole of the recording head and the center of the heating spot in the down-track direction and in the cross-track direction is shown.

[0076] Figure 17 As shown, according to the second embodiment, in the HDD recording head 58, the magnetic pole surface 60b of the main magnetic pole 60 facing the near-field light emitting element 65 is relatively and the central axis CL that passes through and extends in the longitudinal direction of the carriage (the direction in which the magnetic head moves relative to the magnetic disk 16 ) is formed to be left-right asymmetrical. The pole surface 60b is formed of a flat surface curved at the center, inclined with respect to a plane CT passing through the intersection of the central axis CL and the pole surface 60b and extending in the cross-track direction perpendicular to the central axis CL. Specifically, on the magn...

no. 3 Embodiment approach ）

[0080] Figure 19 In the HDD according to the third embodiment, the positional relationship between the main magnetic pole of the recording head and the heating spot center in the down-track direction and in the cross-track direction is shown.

[0081] Such as Figure 19 As shown, according to the third embodiment, in the HDD recording head 58, the magnetic pole surface 60b of the main magnetic pole 60 facing the near-field light generating element 65 is relatively and the central axis CL that passes through and extends in the longitudinal direction of the carriage (the direction in which the magnetic head moves relative to the magnetic disk 16 ) is formed to be left-right asymmetrical. The magnetic pole surface 60b is formed by a curved surface concave toward the near-field light generating element 65 side, and is inclined with respect to a plane CT passing through the intersection of the central axis CL and the magnetic pole surface 60b and extending in a track crossing dir...

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Abstract

According to one embodiment, a magnetic recording head includes a medium-facing surface, a near-field transducer partially exposed in the medium-facing surface, and a magnetic pole including a distal end surface and a pole end surface facing the near-field transducer. The pole end surface in the medium-facing surface is asymmetric with respect to a central axis passing through a center of the near-field transducer and extending in a longitudinal direction of the medium-facing surface.

Description

[0001] related application [0002] This application enjoys the priority of the earlier application based on Japanese Patent Application No. 2013-221316 (filing date: October 24, 2013). This application incorporates this prior application in its entirety by reference. technical field [0003] The embodiments described here relate to a magnetic recording head employing a heat-assisted recording method and a magnetic disk device including the same. Background technique [0004] As a magnetic disk device, for example, the magnetic disk device includes: a magnetic disk as a recording medium disposed in a housing; a spindle motor that supports and rotationally drives the magnetic disk; and a magnetic head that reads / writes information on the magnetic disk. The magnetic head is supported by a rotatable magnetic head actuator, and moves and positions along the radial direction of the magnetic disk. [0005] In recent years, in order to increase the recording density, increase the...

Claims

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Application Information

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IPC IPC(8): G11B5/31G11B5/48
CPCG11B5/012G11B5/1278G11B5/1872G11B5/3116G11B5/6088G11B2005/0021
Inventor 山田裕一
Owner KK TOSHIBA