Charge induction on GMR recording heads caused by AC power fields

Author

Honda, Masamitsu

Author_Institution

Impulse Phys. Lab. Inc., Yokohama, Japan

fYear

2000

fDate

26-28 Sept. 2000

Firstpage

330

Lastpage

336

Abstract

A new charge induction mechanism on a head gimbal assembly (HGA) is discussed. According to the dynamic charge induction experiments, there is 30-50 pC of charge induced on the HGA base plate by a small displacement (speed about 10 cm/s) in the 50 Hz AC power fields emanating from the AC charged plate (100 V-rms). During the manufacturing and testing processes, a chance of AC induced ESD could result due to metal-metal contacts between the base plate and the other static charge free objects under a normal ESD control environment.

Keywords

electronic equipment testing; electrostatic discharge; giant magnetoresistance; magnetic heads; magnetic recording; magnetoresistive devices; surface charging; 10 cm/s; 100 V; 50 Hz; AC charged plate; AC induced ESD; AC power fields; ESD control environment; GMR recording heads; HGA base plate; base plate; charge induction; charge induction mechanism; displacement speed; dynamic charge induction; head gimbal assembly; manufacturing processes; metal-metal contact; static charge free objects; testing process; Copper; Electrostatic discharge; Insulation; Insulator testing; Magnetic heads; Manufacturing processes; Physics; Rubber; Voltage; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Overstress/Electrostatic Discharge Symposium Proceedings 2000

Conference_Location

Anaheim, CA, USA

Print_ISBN

1-58537-018-5

Type

conf

DOI

10.1109/EOSESD.2000.890096

Filename

890096