Reliability tests of the MR head in helical-scan tape systems

Soda, Y.; Nagai, Naofumi; Kasuga, Katsuhiro; Shirai, T.; Kondô, Masao; Ozue, T.

doi:10.1109/20.950947

Cited by 18 publications

(3 citation statements)

References 2 publications

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“…The compatibility of the new sensor technology with the specific head-medium interface had to be demonstrated. A lot of work has been performed to show that both the magnetoresistive heads and metal evaporated media could endure large number of recording passes without significant degradation of the recording performances (Kawakami et al, 2005;Ozue et al, 1999;Soda et al, 2001Soda et al, , 2003. The advantages of anisotropic magneto-resistive sensors over inductive sensors for recording on obliquely evaporated media have been reported by Ozue et al (Fukuda et al, 2000;Ozue et al, 1998Ozue et al, , 1999.…”

Section: Recording Performance Of the Most Recent Oblique Metal Evapomentioning

confidence: 97%

Metal Evaporated Media

Jubert

Onodera

2012

Handbook of Magnetic Materials

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Section: Recording Performance Of the Most Recent Oblique Metal Evapomentioning

confidence: 97%

Metal Evaporated Media

Jubert

Onodera

2012

Handbook of Magnetic Materials

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“…It has been reported that GMR heads have suffered magnetic damage from ESD current on the order of lOrnA having pulse widths on the order of nanoseconds [1]- [3]. Various protection methods and analyses of ESD hazards have been presented [4]- [9]. An example of the contact discharge is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Characterization of contact discharge between small capacitance devices

Soda

Oda

2011

2011 IEEE Industry Applications Society Annual Meeting

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The Giant-magnetoresistive (GMR) head suffers magnetic damage from ESD current on the order of 10 rnA and thermal damage from ESD energy on the order of O.SnJ.Contact discharge from an electrified object into a floating device was investigated as the peak current caused magnetic damage and as the energy-loss caused thermal damage.Experiments with discharges between various capacitors clarified that the discharge between 2pF -capacitors at lOY gave a peak current of 34mA and the discharge between 100pF capacitors at 100Y reached l.SA. A 3D-plot of the peak current simulated by PSPICE indicated that the peak value arose at the order of pF and was approximately maximized at the same value of both capacitors. The current waveform was affected by additional micro-capacitance of O.SpF. Theoretical energy-loss was estimated by the difference between the potential energies prior to and following the discharges. The energy-loss was O.OSnJ for 2pF -capacitors at lOY and increased in excess of O.SnJ when both capacitors were greater than 20pF. 3D-plot of the energy-loss indicated a gradual increase as both capacitance values increased. Comparison of the potential energy-loss and the current energy indicated th at the contact resistance decreased from 1000hm to few-ohm as the energy-loss increased.

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“…When using a giant magenetoresistive (GMR) head for higher recording density, electrostatic discharge (ESD) from the ME tape surface should be less than that of the AMR head [2], [3]. The head/tape interface in a helical-scan tape system is illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

A Resistive Ferrite Substrate for the GMR Head in a Digital Tape System

Soda¹,

Ito²,

Kobayashi³

et al. 2004

IEEE Trans. Magn.

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In helical-scan tape systems using a giant magenetoresistive (GMR) head, there are two threats to reliability, electrostatic discharge, and head wear. To avoid damage by electrostatic discharge, a conductive substrate can allow the discharge current to bypass the GMR head. The type of substrate used for the head is important in minimizing head wear. We investigated what type of substrate is most suitable for the GMR head in a helical-scan tape system.Index Terms-Digital tape system, electrostatic discharge, giant magenetoresistive (GMR) head, resistive ferrite substrate.

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Reliability tests of the MR head in helical-scan tape systems

Cited by 18 publications

References 2 publications

Metal Evaporated Media

Metal Evaporated Media

Characterization of contact discharge between small capacitance devices

A Resistive Ferrite Substrate for the GMR Head in a Digital Tape System

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