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Magnetoresistive sensor having a high resistance soft magnetic layer between sensor stack and shield

A magnetoresistive sensor, high-impedance technology, applied to magnetic heads using thin films, protection measures for magnetic heads, manufacturing magnetic flux-sensitive magnetic heads, etc.

Inactive Publication Date: 2004-11-03
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the required thickness of the insulating layer is now so thin that the read element is susceptible to both electrostatic damage and small faults such as pinholes in the thin insulating layer
Faulty or damaged insulation between the sensor stack and the magnetic shield allows induced currents to flow through the magnetic shield causing a drastic drop in sensor performance

Method used

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  • Magnetoresistive sensor having a high resistance soft magnetic layer between sensor stack and shield
  • Magnetoresistive sensor having a high resistance soft magnetic layer between sensor stack and shield
  • Magnetoresistive sensor having a high resistance soft magnetic layer between sensor stack and shield

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Embodiment Construction

[0015] A preferred embodiment of the present invention provides a magnetic read element having a high impedance soft magnetic layer interposed between at least one insulating layer and a magnetic shield. The high impedance soft magnetic layer allows the magnetic read gap to be reduced without increasing the susceptibility of the read element to electrostatic damage and failure. In another embodiment of the invention, a disk drive has a read element that includes a high impedance soft magnetic layer disposed between at least one insulating layer and a magnetic shield.

[0016] Referring to FIG. 1, a disk drive 100 has at least one rotatable disk 102 supported by a spindle 104 and rotated by a motor (not shown). There is at least one slider 106 with an attached recording head 108 positioned above the surface of the magnetic disk 102 for reading and writing. Recording head 108 includes a write element for writing data onto magnetic disk 102 . The recording head also includes a ...

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Abstract

A magnetoresistive sensor has a high resistance soft magnetic layer disposed between the sensor stack and at least one magnetic shield. The presence of the high resistance soft magnetic layer allows a smaller magnetic read gap to be achieved which results in higher recording density. The susceptibility of the magnetoresistive sensor to defects and electrostatic damage is improved. A disk drive is provided having the novel magnetoresistive sensor.

Description

technical field [0001] This invention relates to magnetoresistive sensors commonly used in disk drives, and more particularly to magnetoresistive sensors having a high impedance soft magnetic layer in the gap. Background technique [0002] Disk drives store most of the data in modern computer systems using magnetic recording of digital information. A disk drive has at least one rotating platter with discrete concentric data tracks. Each disk drive also has at least one recording head, which usually has a separate write and read element for reading and writing data on the tracks. The recording head is constructed on a slider attached to the suspension. The combination of recording head, slider and suspension is called the head gimbal assembly. Additionally, there is an actuator to place the recording head on the particular track of interest. The actuator rotates first to find the track of interest. After placing the recording head on the track, the actuator maintains the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/09G11B5/012G11B5/31G11B5/39G11B5/40
CPCB82Y10/00G01R33/093G11B5/012G11B5/3103G11B5/40B82Y25/00G11B5/3146G11B5/3903G11B5/3133
Inventor 维普尔·P·贾亚塞卡拉
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV