Title :
Electrostatic popping in AMR and GMR heads
Author_Institution :
Quantum Corp., Milpitas, CA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
Dielectric breakdown of insulating layers between the MRE (magneto resistive element) and the conducting shields generates another type of base line shift or popping noise in MR heads. Pulse shapes are similar to those of thermal asperities, but they can be bipolar and can occur without a disk. Measurements illustrate the difficulties of characterizing these pulses. A physical model is proposed to explain the behavior, and a simple SPICE simulation shows similar pulse behavior
Keywords :
SPICE; electric breakdown; giant magnetoresistance; magnetic heads; magnetic recording noise; magnetoresistive devices; AMR head; GMR head; SPICE simulation; base line shift; conducting shield; dielectric breakdown; electrostatic popping noise; insulating layer; magnetoresistive element; pulse shape; Dielectric breakdown; Dielectrics and electrical insulation; Electrostatics; Magnetic heads; Magnetic shielding; Noise generators; Noise shaping; Pulse measurements; Pulse shaping methods; Shape;
Journal_Title :
Magnetics, IEEE Transactions on
