Contact Recording on Perpendicular Rigid Media

Hamilton, Harold

doi:10.3379/jmsjmag.15.s2_483

Cited by 17 publications

(4 citation statements)

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“…The head structure simulated by computer is similar to the flexhead structure proposed by Hamilton [4] for contact recording, but with much smaller trackwidth, pole thickness and overall dimensions to meet the requirement of 10 Gb/in 2 packing density.…”

Section: Introductionmentioning

confidence: 95%

Design Issues of Fully Integrated Submicron Trackwidth Single-pole Head for 10 Gb/in2 Areal Density Perpendicular Rigid Disks

Pan

Mapps

1994

J. Magn. Soc. Jpn.

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Abstract--The write/read perfonnances of the submicron trackwidth flexhead type single pole heads and the crosstalk of the multitrack array heads were quantitatively simulated using three dimensional finite element method. For heads with very thin poles (down to 0.1 J.Ull), pole saturation is the major problem which limits the maximum writing field of the heads. A pole material with Bs of up to 2.1 Tesla is required in order to produce the desired write field for good writability on recording media with coercivity of 150 kAlm. The read efficiency of such a head is only about 0.3. The write-read crosstalk level for the array heads is very large.

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Section: Introductionmentioning

confidence: 95%

Design Issues of Fully Integrated Submicron Trackwidth Single-pole Head for 10 Gb/in2 Areal Density Perpendicular Rigid Disks

Pan

Mapps

1994

J. Magn. Soc. Jpn.

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“…a contact perpendicular recording head with integrated head-flexureconductor, has been shown to be promising for very high density recording [1]. It is important, however, to limit the readback noise in the heads as the area!…”

Section: Introductionmentioning

confidence: 99%

Popcorn Noise in Micro Flexbead® Components

Liu

Louis²,

Anderson³

et al. 1994

J. Magn. Soc. Jpn.

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---The effects of thermal transients after write, changes in stress-magnetostriction products and dynamic domain instabilities on popcorn noise probabilities in micro Flexhead® components were studied., It was observed that popcorn noise probabilities in micro Flexhead® components increase as the write current duration increases, until they saturate, with a specific write current amplitude. With increasing write current amplitude, the initial rate of change of noise probability with write current duration increases. In some cases where the resultant stress-magnetostriction products in micro Flexhead® components are negative, popcorn noise probabilities were observed to increase exponentially as functions of applied stress gradients. High rates of occurrence of dynamic domain instabilities have also been correlated with micro Flexhead® components that have high popcorn noise probabilities. Therefore. high probabilities of popcorn noise in micro Flexhead® components are caused by the combined effects of thermal transients after write, changes in stress-magnetostriction products and dynamic domain instabilities. Finally. an inductance fluctuation measurement technique was shown to be useful in quickly detecting micro Flexhead® components that are susceptible to popcorn noise.

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“…Several integrated head! suspension microdevices have been fabricated for contact recording applications (Hamilton, 1991;Ohwe et al, 1993). High-bandwidth servocontrolled microactuators have been fabricated for ultrahigh-track-density applications, which serve as the frne-position control element of a two-stage, coarse/frne servo system, coupled with a conventional actuator (Miu and Tai, 1995;Fan et aI., 1995;Horsley et aI., 1998).…”

Section: Mold Fabricationmentioning

confidence: 99%