Recording characteristics of submicron discrete magnetic tracks

Lambert, S.E.; Sanders, I.L.; Patlach, A. M.; Krounbi, M.

doi:10.1109/tmag.1987.1065736

Cited by 62 publications

(12 citation statements)

References 10 publications

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“…Sampled servo format [l] and discrete tracks [2], [3] are attractive techniques for track following on narrow track disk recording. K. Watanabe et al demonstrated narrow-track following at a track density of about 200 track/" using a novel " P E R M " (Pre-Embossed Rigid Magnetic) disk, which is intended to be efficiently mass-produced [4].…”

Section: Table I Parameters Of the Head And Mediummentioning

confidence: 99%

High areal density recording using an MR/inductive head and pre-embossed rigid magnetic disk

et al. 1994

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To determine whether a newly developed PERM (Pre-Embossed Rigid Magnetic) dirk can be used with an MR/Inducthe head and a PRML (Partial-Response Maximum-Likelihood) channel, an experimental digital magnetic recording system WM developed. This system used an external clocking schem instead of a conventional selfclockihg scheme. The track pitch WM 5.1 pm, and the track width WM 5.6 pm. Basic read-write characteristics, such M signal-to-noise ratio, frequency response, positive/negative symmetry of the readback pulse, were measured. An areal density of 605kbit/mma (39OMbit/inch') was obtained at a bit error rate of lod.

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Section: Table I Parameters Of the Head And Mediummentioning

confidence: 99%

High areal density recording using an MR/inductive head and pre-embossed rigid magnetic disk

et al. 1994

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“…The forecasted track densities are larger than 500 k track per inch (TPI) for DTR. For DTR media to be a viable alternative, servo information must be accurately integrated into the media [1][2][3]. In a manner similar to the patterning of discrete tracks, the physical patterning of servo information into DTR media offers its own potential advantages.…”

Section: Introductionmentioning

confidence: 99%

Slider Dynamics over a Discrete Track Medium with Servo Patterns

Li¹,

Xu²,

Kobayashi³

2011

Tribol Lett

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The dynamic characteristics of a slider flying over various servo patterns on a discrete track medium surface were investigated. The investigation shows that the air-flow field is disturbed and causes flying amplitude during the transition from grooved longitudinal discrete tracks to a transversal and near-random pattern in the servo field. The effects of the parameters that define the servo pattern including land-area ratio of burst patterns, groove depth, servo-pattern frequency, and the lengths of synchronization (sync), servo address mark (SAM), padding (PAD) blocks, and burst pattern type-on the flying height responses were evaluated. The evaluation results indicate that the flying height amplitude depends on servo-pattern frequency, burst land-area ratio, groove depth, and the lengths of the sync, SAM, and PAD block and burst pattern type. Amplitude of a slider flying over a servo pattern therefore can be reduced by optimizing the servo-pattern design from the viewpoint of these parameters. Moreover, flying-height responses over servo patterns with thermal flying height control (TFC) power were studied and compared with those without TFC power.Keywords Air bearing design Á Discrete track medium Á Servo pattern Á Discrete track recording Á Flying height Á Flying height amplitude Á Air bearing slider Á Hard disk drive 1 Introduction

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“…However, it is getting more and more difficult to improve signal quality in conventional non-patterned media (NPM) while maintaining adequate thermal stability and 'writeability'. Therefore, patterned media, which utilize a lithography technique, including discrete track media (DTM) [1] and bit patterned media (BPM) [2] are studied.…”

Section: Introductionmentioning

confidence: 99%