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Spinning electronic device with narrow spin polarization layer

A technology of spin polarized layer and electron flow, which is applied in the direction of orthogonal magnetization magnetic head, magnetic head using thin film, data recording, etc., and can solve the problems affecting the life and reliability of the writing head

Pending Publication Date: 2022-07-08
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High voltage and / or high current can affect the life and reliability of the write head by degrading the components of the write head

Method used

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  • Spinning electronic device with narrow spin polarization layer
  • Spinning electronic device with narrow spin polarization layer
  • Spinning electronic device with narrow spin polarization layer

Examples

Experimental program
Comparison scheme
Effect test

example B

[0071] The spintronic device is formed to include a seed layer on the MP, MP notches formed on the seed layer, a spacer layer on the MP notches, SPL on the spacer layer, a cap layer on the SPL, a cover layer formed on the cover Top electrode on cap layer. The electron flow is supplied towards the main pole through the spintronic device. similar to Figure 4 of the spintronic device, the area A of the spacer layer-Mp interface of the spintronic device 1 Greater than the area A of the spacer layer-SPL interface 2 , where A 1 >A 2 . Since the device of Example B has the same layers as Example A except in a different order and thus a different shape, Example B illustrates the effect of spintronic device shape on switching characteristics without considering parasitic resistance effects.

example C

[0073] The spintronic device is formed to include a spacer layer on the MP, an SPL on the spacer layer, a cap layer on the SPL, and a top electrode. The electron flow is supplied towards the main pole through the spintronic device. Area A of the spacer layer-Mp interface of a spintronic device 1 Greater than the area A of the spacer layer-SPL interface 2 , where A 1 >A 2 .

[0074] Examples B-C show lower Vjump and higher spin torque efficiencies than Example A. Example C shows a lower Vjump and higher spin torque efficiency than Example B because the spintronic device of Example B includes a seed layer with parasitic resistance.

[0075] In one embodiment, the write head includes a main pole. The seed layer is over the main pole. A spin polarized layer (SPL) is located above the seed layer. The spacer layer is over the SPL. The rear shield is over the spacer layer. The spacer layer forms a first interface between the spacer layer and the back shield and a second int...

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PUM

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Abstract

In one embodiment, a write head includes a main pole. A seed layer is over the main pole. A spin polarization layer (SPL) is over the seed layer. A spacer layer is over the SPL. A rear shield is over the spacer layer. The spacer layer forms a first interface between the spacer layer and the rear shield and a second interface between the spacer layer and the SPL. The first interface has an area greater than an area of the second interface. In another embodiment, a write head includes a main pole. A spacer layer is over the main pole. An SPL is over the spacer layer. A cap layer is over the SPL. A rear shield is over the cap layer. The spacer layer forms a first interface between the spacer layer and the main pole and a second interface between the spacer layer and the SPL. The first interface has an area greater than an area of the second interface.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to US Application No. 16 / 836,687, filed March 31, 2020, which is incorporated herein by reference in its entirety. technical field [0003] Embodiments of the present disclosure generally relate to a write head having a spintronic device. Background technique [0004] Central to the operation and capability of a computer is the storage and writing of data to data storage devices, such as hard disk drives (HDDs). The amount of data processed by computers is rapidly increasing. Magnetic recording media of higher recording densities are required to increase the functionality and capabilities of computers. [0005] To achieve higher recording densities (eg over 1 Tbit / in for magnetic recording media 2 recording density), the width and pitch of the written tracks narrow, and therefore the corresponding magnetic recording bits encoded in each written track. One challenge in narrowing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/31
CPCG11B5/314G11B5/315G11B5/1278G11B2005/0024G11B5/3153G11B5/3116G11B5/3983G11B5/02G11B5/3146G11B5/235G11B5/232
Inventor J·M·弗赖塔格高征冈村进安容彻A·彭特克A·贝尔
Owner WESTERN DIGITAL TECH INC