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Method and system for fabricating magnetic transducers with improved pinning

A technology for transducers and pinned layers, applied in the fields of magnetic field-controlled resistors, manufacturing/processing of electromagnetic devices, instruments, etc., can solve problems such as inaccurate first approximation of transfer curves

Inactive Publication Date: 2015-03-11
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, a first approximation of the transfer curve is inaccurate for such a magnetic element that varies with cos θ

Method used

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  • Method and system for fabricating magnetic transducers with improved pinning
  • Method and system for fabricating magnetic transducers with improved pinning
  • Method and system for fabricating magnetic transducers with improved pinning

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Embodiment Construction

[0014] As noted above, the transfer curve of a magnetic element such as a conventional MR (magnetic recording) sensor 52 changes at higher TMR. It has been determined that these changes may adversely affect the performance of the magnetic transducer 50 . In particular, conventional read sensors 52 have limited utility at higher TMRs. For higher TMRs, the response of the read transducer 52 may not be symmetrical for bits (or bits) with opposite magnetization directions. In addition, the magnitude of the response will be reduced. In other words, the sensitivity of conventional read transducers 50 will be reduced. It has been determined that these losses are all due to changes in the transfer curve of sensor 52 at higher TMRs. An improved read transducer has therefore been developed.

[0015] figure 2 An ABS view and a plan view of an example embodiment of transducer 100 are shown in an equilibrium state. For clarity, figure 2 Not to scale. Read transducer 100 includes re...

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PUM

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Abstract

A method and system for providing a magnetic transducer are disclosed. The method and system include providing a magnetic element that includes a free layer, a pinned layer, and a nonmagnetic spacer layer between the free layer and the pinned layer. The nonmagnetic spacer layer is a tunneling barrier layer. The free layer is configured to be biased in a first direction. The pinned layer has a pinned layer magnetization configured to be pinned in a second direction that is at a first angle from perpendicular to the ABS. The first angle is nonzero and different from ninety degrees. The second direction and the first direction form a second angle that is different from ninety degrees.

Description

Background technique [0001] Figure 1 depicts a portion of a conventional read transducer 50 from the air bearing surface (ABS) and above. The conventional transducer 50 is a read transducer including a read sensor 52 and a hard bias structure 64 . The read sensor includes an AFM layer 54 , a pinned or synthetic antiferromagnetic (SAF) layer 56 , a nonmagnetic spacer layer 58 , a free layer 60 and a capping layer 62 . SAF layer 56 includes a ferromagnetic layer (pinned layer) adjacent to AFM layer 54, a ferromagnetic (reference) layer, and a nonmagnetic spacer layer between the pinned layer and the reference layer. For simplicity, the pinned layer and the reference layer are not separately depicted in FIG. 1 . However, the magnetization directions 55 and 57 of the pinned and reference layers are shown separately. The magnetization directions 55 and 57 are pinned perpendicular to the ABS (into or out of the plane of the paper in the ABS view). The free layer 60 has a magneti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/60
CPCY10T428/1114H01L43/08H01L43/12G11B5/3932G11B5/3906H01F10/3272H01F10/3286Y10T29/49034B82Y25/00H01F10/3254G01R33/098H10N50/01H10N50/10
Inventor C·凯泽L·L·陈Q·凌
Owner WESTERN DIGITAL TECH INC