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Head slider and magnetic storage device

A slider and magnetic pole technology, applied in information storage, recording information storage, configuration/installation of recording head, etc., can solve problems such as inaccurate detection of magnetic information data

Inactive Publication Date: 2009-07-01
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnetic information data cannot be accurately detected

Method used

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  • Head slider and magnetic storage device
  • Head slider and magnetic storage device
  • Head slider and magnetic storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 The internal structure of a hard disk drive (HDD) 11 as an example of a storage medium drive or a storage device is schematically illustrated. The hard disk drive 11 includes a box-shaped enclosure 12 . The enclosure 12 includes an enclosure cover, not shown, and a box-shaped enclosure base 13 delimiting, for example, a flat parallelepiped inner space. The enclosure base 13 can be made, for example, of a metallic material such as aluminum. A molding process may be used to form the enclosure base 13 . The enclosure cover is connected to the enclosure base 13 . The enclosure cover serves to close the opening of the inner space within the enclosure base 13 . The enclosure cover may be formed from, for example, a sheet-like material using a pressing process.

[0028] At least one magnetic recording disk 14 as a recording medium is placed in the inner space of the enclosure base 13 . One or more magnetic recording disks 14 are mounted on the drive shaft of a s...

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PUM

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Abstract

A magnetoresistive element is located between a lower shielding layer and an upper shielding layer. The magnetoresistive element receives an electric current through the lower shielding layer and the upper shielding layer. A non-magnetic conductive layer is embedded in the insulating film between the slider body and the lower shielding layer. An air layer is formed between the head slider and a storage medium. Capacitive coupling is established between the head slider and the storage medium. The capacitive coupling allows transmission of the noise from the storage medium to the slider body. The noise affects capacitance established between the lower shielding layer and the slider body. The non-magnetic conductive layer serves to prevent variation in a potential difference resulting from transmission of the noise between the lower shielding layer and the upper shielding layer.

Description

technical field [0001] The present invention relates to, for example, a head slider installed in a storage device such as a hard disk drive (HDD). Background technique [0002] For example, a tunnel junction magnetoresistive (TMR) element is mounted on the head slider. The TMR element is embedded in an insulating film on the slider body of the head slider. The insulating film is made of Al 2 o 3 (alumina) etc. The TMR element includes a tunnel junction between an upper masking layer and a lower masking layer. A detection current is provided to the tunnel junction film through the lower shielding layer and the upper shielding layer. [0003] In TMR elements, the lower shielding layer and the slider body together act as a capacitor. When capacitive coupling is established, for example, noise is transferred from the magnetic disk to the slider body via the distance between the magnetic disk and the slider body. In response to the noise transfer, the electrical energy sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/39
CPCG11B5/3143G11B5/11G11B5/40G11B5/3967G11B5/3912G11B5/39G11B5/60G11B21/21
Inventor 古屋早知子久保田哲行桥本淳一青木知佳
Owner FUJITSU LTD