Pt-Doped Al2O3 as Dissipative Gap-Material in Tape Heads

Soda, Y.; Sekine, Matsuo

doi:10.1109/08ias.2008.114

Cited by 1 publication

(1 citation statement)

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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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Section: Introductionmentioning

confidence: 99%