ESD Tolerance of GMR and TMR Heads Within Hard Disk Drives

Author

Miyatake, Masami ; Kugiya, Fumio ; Kodama, Naoki

Author_Institution

Hitachi Global Storage Technol. Japan Ltd., Fujisawa, Japan

Volume

10

Issue

4

fYear

2010

Firstpage

476

Lastpage

481

Abstract

Electrostatic discharge (ESD) tolerance is discussed for giant magnetoresistive (GMR) and tunneling magnetoresistive (TMR) heads within hard disk drives (HDDs). There are two kinds of testing methods for ESD: the component ESD method with Human Body Model or Machine Model and the IEC61000-4-2 testing method. The IEC61000-4-2 testing method for GMR and TMR heads within head gimbal assembly (HGA), head stack assembly (HSA), and HDD was surveyed first, and the ESD tolerance at each state of HGA, HSA, and HDD was evaluated. The equivalent circuits for three states were proposed and proved to be consistent with experimental results by the IEC61000-4-2 testing method.

Keywords

disc drives; electronic equipment testing; electrostatic discharge; equivalent circuits; giant magnetoresistance; hard discs; tunnelling magnetoresistance; ESD tolerance; GMR heads; TMR heads; electrostatic discharge tolerance; equivalent circuits; giant magnetoresistive heads; hard disk drives; head gimbal assembly; head stack assembly; human body model; machine model; tunneling magnetoresistive heads; Discharge; Thermal Fly-height Control (TFC); electrostatic discharge (ESD); giant magnetoresistive (GMR) head; hard disk drive (HDD); tunneling magnetoresistive (TMR) head;

fLanguage

English

Journal_Title

Device and Materials Reliability, IEEE Transactions on

Publisher

ieee

ISSN

1530-4388

Type

jour

DOI

10.1109/TDMR.2010.2061848

Filename

5530363