Head and Interface for High Areal Density Tape Recording

Biskeborn, R. G.; Jubert, Pierre‐Olivier; Liang, J.; Lo, C.

doi:10.1109/tmag.2012.2196506

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…1 Further increases in the magnetic density and head read/write performance of future HDD will necessitate an improvement of magnetic layer design and a reduction in the head media read/write spacing (HMS). 2 This lower HMS corresponds to a lower head flying height, a thinner diamond-like carbon (DLC) overcoat thickness and a reduced damage layer thickness (as illustrated in Fig. 1).…”

Section: Introductionmentioning

confidence: 94%

Optimisation of DLC deposition parameters for magnetic and reliability properties

Yeh

Chao²,

Tan³

2015

Surface Engineering

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This study uses the Taguchi method and Grey relational analysis in order to simultaneously improve the magnetic and corrosion performance in media. Higher resistivity and Co corrosion resistance of the overcoat film were found using higher source gas H/C ratio and gas flows. This trend is due to the fact that the I d /I g ratio decreases with increasing source gas H/C ratio and flowrate, which indicate a compositional change from a less dominant sp 3 structure towards a highly dominant sp 3 structure. The optimal diamond-like carbon (DLC) deposition parameters are source gas C 2 H 6 , bias voltage of 2100 V, anode voltage of 100 V and gas flow of 40 sccm. Compared with the standard DLC deposition conditions, this improved process result obtained from the optimisation of overcoat deposition parameters can achieve a 0?5 nm lower overcoat thickness with excellent corrosion resistance and a 0?90 dB higher SpSNR.

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Section: Introductionmentioning

confidence: 94%

Optimisation of DLC deposition parameters for magnetic and reliability properties

Yeh

Chao²,

Tan³

2015

Surface Engineering

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“…For bidirectional operation with a two-module head design, the tape must be wrapped around both edges of each head module (a positive wrap angle on the leading and trailing edges). However, for three-module head designs, such as that described by Biskeborn et al [13], it is possible to operate at a zero or even negative trailing-edge wrap angle on the two outer modules. In addition, non-symmetric wrap angles can be used in unidirectional tape recording such as in the servo formatting process used to pre-record positioning information onto the tape during manufacture.…”

Section: Introductionmentioning

confidence: 99%

Asymmetrically Wrapped Flat-Profile Tape–Head Friction and Spacing

Engelen

Lantz

2015

Tribol Lett

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In this work, we study the friction and spacing between a magnetic data storage tape and a recording head. The tape-head friction force and magnetic spacing are measured as a function of the angles with which the tape is wrapped around the read/write head at 2 and 6 m s -1 tape transport velocity. It is found that the friction force can be described as a linear function of the leading and trailing wrap angles, where the friction force increases for increasing wrap angles. The analysis treats the total friction force as the sum of three components resulting from (1) the leading edge, (2) the head surface, and (3) the trailing edge. Coefficients of friction are calculated for each of the three components from experimental data. The leading edge and head surface components are both dependent on the leading-edge wrap angle and independent of the trailing-edge wrap angle, whereas the trailing-edge component is only dependent on the trailing-edge wrap. In addition, the estimated magnetic spacing is found to decrease with increasing leading-edge wrap angle, but is independent of the trailing-edge wrap angle, even for negative trailing-edge wrap angles. Hence, the trade-off between friction and spacing can be optimized through judicious choice of the wrap angles. In addition, we find that a significant portion of the friction is due to edge friction (as high as 70 % in the case of symmetric wrap). Therefore, we conclude that modifications to the head surface topography to reduce the contact area may not result in a significant reduction in head-tape friction.

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TMR tape drive for a 15 TB cartridge

Biskeborn

Fontana

et al. 2017

AIP Advances

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This paper highlights the development of tunnel magnetoresistive (TMR) sensors for magnetic tape recording applications. This has led to the introduction of a tape drives supporting a 15 TB native tape cartridge, currently the highest capacity available. Underscoring this development is the fact that the TMR sensors must run in continual contact with the tape media. This is contrasted with modern hard disk drive (hdd) sensors, which fly above the disk platters. Various challenges encountered in developing and deploying TMR are presented. In addition, advances to the write transducer are also discussed. Lastly, the authors show that future density scaling for tape recording, unlike that for hdd, is not facing limits imposed by photolithography or superparamagnetic physics, suggesting that cartridge capacity improvements of 4 to 6x will be achieved in the next 4 to 8 years.

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Head and Interface for High Areal Density Tape Recording

Cited by 7 publications

References 7 publications

Optimisation of DLC deposition parameters for magnetic and reliability properties

Optimisation of DLC deposition parameters for magnetic and reliability properties

Asymmetrically Wrapped Flat-Profile Tape–Head Friction and Spacing

TMR tape drive for a 15 TB cartridge

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