Magnetic changes in GMR heads caused by electrostatic discharge

被引：74

作者：

Wallash, A ^{[1
]}

Kim, YK

机构：

[1] Quantum Corp, Milpitas, CA 95035 USA

[2] MKE Quantum Components, Louisville, CO 80027 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1998年 / 34卷 / 04期

关键词：

ESD; GMR; MR; spin valve; recording heads;

D O I：

10.1109/20.706602

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The effects of current transients on the magnetic response of GMR sensors is studied. It is shown that GMR sensors with an FeMn exchange layer exhibit large magnetic changes after a single ESD current transient. The energy which results in magnetic failure is only 0.9 nJ, which is much less than the 6 nJ which causes physical melting damage to the GMR sensor. These serious magnetic changes are explained in terms of resetting of the FeMn exchange layer direction due to the elevated temperature and internal magnetic field during the current transient. It is concluded that ESD stress testing of GMR sensors has revealed a new and important magnetic failure mechanism in GMR sensors.

引用

页码：1519 / 1521

页数：3

共 8 条

[1] DESIGN AND OPERATION OF SPIN-VALVE SENSORS [J].

HEIM, DE ;

FONTANA, RE ;

TSANG, C ;

SPERIOSU, VS ;

GURNEY, BA ;

WILLIAMS, ML .

IEEE TRANSACTIONS ON MAGNETICS, 1994, 30 (02) :316-321

[2]

LAM C, 1997, P 19 EOS ESD S, P386

[3] Giant magnetoresistive spin valve bridge sensor [J].

Spong, JK ;

Speriosu, VS ;

Fontana, RE ;

Dovek, MM ;

Hylton, TL .

IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (02) :366-371

[4] DESIGN, FABRICATION AND TESTING OF SPIN-VALVE READ HEADS FOR HIGH-DENSITY RECORDING [J].

TSANG, C ;

FONTANA, RE ;

LIN, T ;

HEIM, DE ;

SPERIOSU, VS ;

GURNEY, BA ;

MASON, ML .

IEEE TRANSACTIONS ON MAGNETICS, 1994, 30 (06) :3801-3806

[5]

WALLASH A, 1997, UNDERSTANDING ESD EM, P101

[6]

WALLASH A, 1995, P 17 EOS ESD S, P322

[7]

WALLASH A, 1997, J APPL PHYS, V81, P4929

[8] Standardized ESD test for magnetoresistive recording heads [J].

Wallash, AJ .

IEEE TRANSACTIONS ON MAGNETICS, 1997, 33 (05) :2911-2913

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