Magnetic recording disk drive with shingled writing and wide-area thermal assistance

A disk drive, magnetic recording technology, applied in the direction of magnetic recording, recording of information on a magnetic disk, data recording, etc.

Inactive Publication Date: 2012-11-14
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been shown that wide area heaters result in comparable ATE due to repeated exposure of adjacent tracks to the combination of the finge field from the write head and the heat from the wide area heater

Method used

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  • Magnetic recording disk drive with shingled writing and wide-area thermal assistance
  • Magnetic recording disk drive with shingled writing and wide-area thermal assistance
  • Magnetic recording disk drive with shingled writing and wide-area thermal assistance

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] figure 1 is a top view of a thermally assisted recording (TAR) disc drive according to the present invention. The disk drive has a housing or base 101 supporting an actuator 130 and a spindle motor (not shown) for rotating the magnetic recording disk 10 about its center 13 in the direction indicated by arrow 15 . The actuator 130 may be a voice coil motor (VCM) rotary actuator having a rigid arm 134 and rotating about a pivot 132 . The head-suspension assembly includes: a suspension 121 having one end attached to the end of the actuator arm 134; a flexure 123 attached to the other end of the suspension 121; and a head carrier such as an air bearing slide Block (air bearing slider) 122 , attached to bend 123 . Suspension 121 allows slider 122 to remain very close to the surface of disk 10 and flexure 123 enables slider 122 to "pitch" and "roll" on the air cushion created by rotating disk 10. The slider 122 supports the read / write head or recording head 109 on the end...

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Abstract

The present invention provides a thermally-assisted recording (TAR) disk drive using a 'wide-area' heater with 'shingled' recording. In shingled recording, the write head pole tip is wider than the read head in the cross-track direction and writes magnetic transitions by making a plurality of consecutive circular paths that partially overlap. The non-overlapped portions of adjacent paths form the data tracks, which are thus narrower than the width of the write pole tip. The data tracks are grouped into annular bands and when data is to be rewritten, all of the data tracks in an annular band are also rewritten. The wide-area heater may be a waveguide with an output end that generates a heated area on the disk recording layer which is wider than the cross-track width of the write pole tip. It has been determined that the use of a wide-area heater with shingled recording does not result in any significant adjacent track erasure (ATE).

Description

technical field [0001] This invention relates generally to thermally assisted recording (TAR) systems in which data is written while the magnetic recording layer is at an elevated temperature, and more particularly to TAR disk drives having "wide area" heaters that heat An area of ​​the disc that is wider than the data tracks to be recorded. Background technique [0002] In a magnetic recording disk drive, the magnetic material (or medium) used for the recording layer on the disk is chosen to have sufficient coercivity so that the magnetized data regions defining the "bits" of data are written precisely and maintain their magnetization state until overwritten by a new data bit. As areal data density (the number of bits that can be recorded per unit surface area of ​​the disc) increases, the magnetic grains that make up the data bits can be so small that they can demagnetize simply due to thermal instabilities or disturbances within the magnetized bits (The so-called "super...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/012G11B5/48G11B5/667
CPCG11B5/012G11B2005/0021G11B5/6088G11B5/315G11B5/314
Inventor 庄嘉杨H.J.罗森B.C.斯蒂普T.C.斯特兰德P.A.范德海杰登
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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