TRACK SEEKING, HEAD-DISK SPACING VARIATION AND HEAD-DISK INTERFACE FAILURE

Track seeking and the slider-disk space variation during track seeking are becoming more and more serious concerns when technology moves to 0.8 similar to 1.5 mu in gap flying-height. This paper reports results of in-situ experimental investigations of the slider's dynamic flying performance during track seeking. A partial erase method and a slider -disk resistance method were used in the investigation. Results indica te that the suspension's vibration during track seeking plays an impor tant role in the flying height vibration of slider. Furthermore, resul ts indicate that the likely zone of slider-disk impact can be revealed by monitoring the resistance and the VCM current waveform simultaneou sly. A model is proposed also to explain the relationship of flying pa rticles inside disk chamber, the slider's dynamic performance during t rack seeking and the flying particles induced HDI failure.