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Patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers

A perpendicular magnetic recording and patterning technology, applied in the direction of pattern recording carrier, magnetic recording, different recording carrier forms, etc., can solve the problems of size and magnetic uniformity and writability adverse effects etc.

Inactive Publication Date: 2013-01-23
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The size and magnetic uniformity between islands and the writability of individual islands can be adversely affected by the etching process

Method used

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  • Patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers
  • Patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers
  • Patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers

Examples

Experimental program
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Embodiment Construction

[0019] figure 1 is a top view of a patterned media magnetic recording disk drive 100 with a patterned media magnetic recording disk 200 . The drive 100 has a housing or disk base 112 that supports the actuator 130 , and a drive motor for rotating the magnetic recording disk 200 . The actuator 130 may be a voice coil motor (VCM) rotary actuator having a rigid arm 131 and rotating about a pivot 132 as indicated by arrow 133 . The head suspension assembly includes: a suspension 135 attached at one end to the end of the actuator arm 131 ; Suspension 135 allows sled 120 to be held very close to the surface of disc 200 and enables sled 120 to "pitch" and "pitch" on the air cushion created by disc 200 as disc 200 rotates in the direction of arrow 20. Roll". The magnetoresistive read head (not shown) and the inductive write head (not shown) are typically formed as a series of films and structures patterned on the trailing end of the slider 120, as is well known in the art. Integra...

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Abstract

The invention relates to a patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers. The patterned perpendicular magnetic recording medium has discrete data islands that have first and second ferromagnetic layers (MAG1 and MAG2) with first and second nonmagnetic interlayers (IL1 and IL2) between MAG1 and MAG2. MAG1 and MAG2 may be similar CoPtCr alloys with similar thicknesses, with thicknesses of IL1 and IL2 that assure that MAG1 and MAG2 are strongly exchange coupled. Alternatively, MAG2 may be a write assist layer, for example a high-saturation magnetization, magnetically soft material in an exchange-spring structure, with IL1 being very thin so that IL2 functions as the coupling layer between MAG1 and the write-assist MAG2 layer. In an application for thermally-assisted recording (TAR), MAG2 may be the chemically-ordered equiatomic binary alloy FePt or CoPt based on the L10 phase, with high magneto-crystalline anisotropy (Ku).

Description

technical field [0001] The present invention relates generally to patterning perpendicular magnetic recording media, such as disks for use in magnetic recording hard disk drives, and more particularly to patterned disks with uniform data islands that enhance magnetic recording performance. Background technique [0002] Magnetic recording hard drives with patterned magnetic recording media have been proposed to increase data density. In conventional continuous magnetic recording media, the magnetic recording layer is a continuous layer over the entire surface of the disk. In patterned media, also called bit-patterned media (BPM), the magnetic recording layer on the disk is patterned into small isolated data islands arranged in concentric data tracks. While a BPM disk may be a longitudinal magnetic recording disk where the magnetization direction is parallel to or in the plane of the recording layer, due to the possibility of increased data density for perpendicular media, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/66
CPCG11B5/65G11B5/66G11B2005/0021G11B5/855G11B5/82G11B5/746G11B5/672G11B5/676
Inventor 埃内斯托·马里内罗迪特尔·韦勒布赖恩·约克
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV