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Microwave Assisted Magnetic Recording (mamr) Write Head And System

A microwave-assisted, magnetic recording technology, applied in the direction of magnetic recording head, magnetic recording, data recording, etc., can solve the problem of increasing the reluctance of the magnetic circuit

Inactive Publication Date: 2016-03-16
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this location provides a relatively narrow flux path and thus increases the reluctance of the magnetic circuit, which means that higher write currents and frequency responses are required to obtain the desired magnetic write field

Method used

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  • Microwave Assisted Magnetic Recording (mamr) Write Head And System
  • Microwave Assisted Magnetic Recording (mamr) Write Head And System
  • Microwave Assisted Magnetic Recording (mamr) Write Head And System

Examples

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Embodiment Construction

[0015] figure 1 is a top plan view of hard disk drive 10 for use with a microwave assisted magnetic recording (MAMR) write head with the cover removed. Disk drive 10 includes a rigid base 12 supporting a spindle 14 that supports a stack of disks including a top platter 16 . The spindle 14 is rotated by a spindle motor (not shown) for rotating the disk in the direction indicated by the curved arrow 105 . The hard disk drive 10 has at least one load beam assembly 20 with an integrated guided suspension (ILS) or flexure 30 with conductive interconnect traces Line or array 32 of lines. The load beam assembly 20 is attached to a rigid arm 22 connected to an E-shaped support structure, sometimes referred to as an E-block 24 . Each flexure 30 is attached to an air bearing slider 28 . A magnetic recording read / write head 29 is positioned on the distal or trailing surface of a slider 28 which serves as a head carrier. Flexures 30 enable slider 28 to “pitch” or “roll” on the air be...

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Abstract

A microwave-assisted magnetic recording (MAMR) write head includes a yoke structure with a main pole, a flux return pole, and a trailing magnetic shield. The main pole includes a write pole with a tip at the disk-facing surface, a sub pole with an end recessed from the disk-facing surface and an electrically insulating layer between the write pole and the sub pole. The spin-torque oscillator (STO) is located at the disk-facing surface between the trailing shield and the write pole tip. The insulating layer assures that the STO current is not shorted between the return pole and the write pole. The insulating layer between the write pole and the sub pole increases the area of the junction between the return pole and write pole, which reduces the magnetic reluctance of the yoke structure.

Description

technical field [0001] The present invention relates generally to magnetic recording systems, and more particularly to a write head with a spin torque oscillator (STO) providing microwave assisted magnetic recording (MAMR). Background technique [0002] Perpendicular magnetic recording (PMR) in magnetically recorded hard drives allows for ultrahigh recording densities, such as the areal density of recorded bits on a magnetic disk, where the recorded bits are stored along the perpendicular or out-of-plane direction of the magnetic recording on the disk. layer. However, increasing the recording density requires a corresponding reduction in the size of the magnetic grains in the magnetic recording layer to obtain a sufficient medium signal-to-noise ratio. As the size of magnetic particles decreases, the magnetocrystalline anisotropy of the magnetic particles must be increased to maintain sufficient thermal stability. At the same time, the magnetic write field from the write h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/127G11B5/31
CPCG11B5/3116G11B5/3146G11B2005/0024G11B5/1278G11B5/3133G11B5/3143
Inventor 江藤公俊幡谷昌彦细见和彦丸山洋治杉浦健二杉山干人
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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