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Magnetic sensor with narrow track width and small read gap

A magnetic sensor and sensor technology, applied in the field of magnetic reading sensors, can solve the problem of the degree to which the sensor layer affects the performance and stability of the sensor

Active Publication Date: 2019-03-12
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the sensor layer can only be reduced to an extent that does not adversely affect sensor performance and stability

Method used

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  • Magnetic sensor with narrow track width and small read gap
  • Magnetic sensor with narrow track width and small read gap
  • Magnetic sensor with narrow track width and small read gap

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Experimental program
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Embodiment Construction

[0018] The following description is of the best mode currently contemplated for carrying out the invention. This description was made to illustrate the general principles of the invention, this description is not meant to limit the inventive concepts claimed herein.

[0019] now refer to figure 1 , there is shown a disk drive 100 embodying the present invention. Such as figure 1 As shown, at least one rotatable disk 112 is supported on a spindle 114 and rotated by a disk drive motor 118 , all mounted within housing 101 . Magnetic recording on each disk takes the form of an annular pattern of concentric data tracks (not shown) on disk 112 .

[0020] At least one slider 113 is located adjacent to the magnetic disk 112 , and each slider 113 supports one or more magnetic head assemblies 121 . As the disk rotates, slider 113 moves in and out radially over disk surface 122 so that head assembly 121 can access different tracks of the disk on which desired data is written. Each s...

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PUM

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Abstract

The invention discloses a magnetic sensor, a manufacturing method thereof and a magnetic data recording system. A magnetic sensor has a first sensor stack portion including a free layer, a nonmagnetic spacer or barrier layer, and a portion of a pinned layer structure. The sensor has a second sensor stack portion formed over the first sensor stack portion. The second sensor stack portion includes a second portion of the pinned layer structure and a layer of antiferromagnetic material formed thereon. The first sensor stack portion is formed with a width and bar height that define the functional width and bar height of the sensor, while the upper portion can be made wider and deeper without affecting sensor performance. Since the patterning of the first sensor stack portion is performed on thinner structures than would be required to pattern the entire sensor stack, patterning can be performed at smaller sizes and with higher resolution.

Description

technical field [0001] The present invention relates to magnetic data recording, and more particularly to a magnetic read sensor having a track width defined by a bottom deposited free layer structure and having a pinned layer structure deposited above the free layer structure. Background technique [0002] The heart of a computer is a component called a disk drive. A disk drive includes a rotating disk, a read head and a write head suspended by a cantilever adjacent to the surface of the rotating disk, and an actuator that swings the cantilever to place the read and write head on the rotating disk at a selected location. above the circular orbit. The read and write heads sit directly on the slider with an air bearing surface (ABS). When the disk is not spinning, the cantilever biases the slider into contact with the surface of the disk, but when the disk is spinning, the spinning disk swirls the air. The write and read heads are used to write and read magnetic imprints t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/127G11B5/11G11B5/23
CPCG11B5/3163G11B5/3912G11B5/398H10N50/80H10N50/10G11B5/39
Inventor Z·高H·S·吉尔Y·洪Q·勒
Owner WESTERN DIGITAL TECH INC