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Magnetoresistive head and magnetic recording-reproducing apparatus

A technology of magnetoresistive magnetic head and magnetoresistive film, which is applied in the directions of magnetic recording, magnetic recording head, manufacturing magnetic flux sensitive magnetic head, etc., can solve the problems of reducing the bit length and the gap length of magnetic recording-reproducing device, etc.

Inactive Publication Date: 2004-12-01
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As described above, there is a limit to the reduction of the gap length in the shielded GMR magnetic head, and therefore, it is difficult to meet the requirement of reducing the bit length in the magnetic recording-reproducing apparatus.

Method used

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  • Magnetoresistive head and magnetic recording-reproducing apparatus
  • Magnetoresistive head and magnetic recording-reproducing apparatus
  • Magnetoresistive head and magnetic recording-reproducing apparatus

Examples

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no. 1 example

[0033] Next, a shielded GMR magnetic head will be described according to a first embodiment of the present invention. Figures 1A to 1C shows the structure of the shielded GMR magnetic head of the present embodiment, wherein, Figure 1A is a cross-sectional view of a GMR head along a direction parallel to the track width direction of a magnetic recording medium (not shown), and FIG. 1B is a cross-sectional view of a GMR head along a direction parallel to a track direction of a magnetic recording medium (not shown), and Figure 1C It is a plan view showing the GMR magnetic head viewed from the direction of the air bearing surface (ABS). Figure 1A is a cross-sectional view along line 1A-1A shown in FIG. 1B . The surface on the bottom side in the figure represents ABS. Figure 1B is along the Figure 1A The cross-sectional view shown on line 1B-1B. The surface on the left in the figure represents ABS.

[0034] The GMR magnetic head of the present embodiment includes an insulati...

no. 2 example

[0089] A GMR magnetic head according to a second embodiment of the present invention will be described below. Fig. 12A is a cross-sectional view of the GMR magnetic head along a direction parallel to the track width direction; Figure 12Bis a cross-sectional view of the GMR head along a direction parallel to the track direction; and Figure 12C is a plan view of the GMR head viewed from the ABS direction. Figure 12A is along the Figure 12B The cross-sectional view at line 12A-12A. The surface on the bottom side in the figure represents ABS. Figure 12B is a cross-sectional view along line 12B-12B in FIG. 12A. The surface on the left in the figure represents ABS. In addition to the components shown in FIGS. 12A to 12C, the GMR magnetic head of the present invention includes an insulating nonmagnetic film surrounding the above components and wiring for connecting the SV element with a detection circuit and the like.

[0090] Such as Figure 12B and 12C As shown, the bot...

no. 3 example

[0099] Figure 13 is a cross-sectional view showing the structure of a GMR magnetic head according to a third embodiment of the present invention. In this embodiment, the nonmagnetic interlayer 3 is formed on the insulating layer 13 , and the magnetization free layer 1 and the magnetization pinned layer 5 are formed on the nonmagnetic interlayer 3 . The magnetization free layer 1 and the magnetization pinned layer 5 are formed to be separated from each other and electrically insulated from each other by the insulating film 69 . The detection current for the resistance of the magnetostatic GMR element flows through the first electrode 7 , the magnetized pinned layer 5 , the nonmagnetic intermediate layer 3 , the magnetized free layer 1 , the pillar electrode 21 and the upper magnetic shield 19 .

[0100] In this embodiment, the magnetization free layer 1 and the magnetization pinned layer 5 are connected to the same surface of the nonmagnetic intermediate layer 3 . It is suff...

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Abstract

A magnetoresistive head includes a first magnetic shield, a first insulating film, a magnetoresistive film, a second insulating film and a second magnetic shield arranged in a track direction. The magnetoresistive film includes a magnetization free layer adjacent to an air-bearing surface, a magnetization pinned layer apart from the magnetization free layer in a head height direction as viewed from the air-bearing surface, and a nonmagnetic intermediate layer connecting the magnetization free layer and the magnetization pinned layer, a magnetization direction of the magnetization free layer being rotatable in an external magnetic field and a magnetization direction of the magnetization pinned layer being substantially pinned under the external magnetic field.

Description

[0001] Cross References to Related Applications [0002] This application is based on, and claims priority from, the first Japanese Patent Application No. 2003-48516, the filing date of which is February 26, 2003, the entire content of which is incorporated herein by reference . technical field [0003] The present invention relates to a magnetoresistive head using a spin-valve element and a magnetic recording-reproducing apparatus in which the magnetoresistive head is mounted. Background of the invention [0004] In recent years, recording density has increased in magnetic recording-reproducing devices such as HDDs. As the recording density is increased, the size of a recording bit as a recording unit in the recording medium is also reduced, and the signal flux generated by the recording medium is also lower. Under such circumstances, a highly sensitive magnetoresistive head (MR head) that directly detects a medium magnetic flux by utilizing a magnetoresistance effect has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/39H01L43/08
CPCG11B5/3912G11B5/3932G11B5/39
Inventor 吉川将寿高岸雅幸
Owner KK TOSHIBA
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