Effect of reduction of slider pitch-mode vibration on magneticrecording performance at low-clearance head-disk interface

Yuki Shimizu, Junguo Xu, Jianhua Li, Hidekazu Kohira, Kiyoshi Hashimoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Aiming at improvements of both stability of slider flying and magnetic-recording performance under a low-clearance condition, a "narrow-grooved slider" was constructed and demonstrated at drive level. The proposed slider has narrow grooves on its center pad of an air-bearing surface for attaining a high-damping effect on pitch-mode resonant vibration of the air bearing. The relationship between the high-damping effect and the pitch-mode resonant vibration was studied, and the magnetic-recording performance at the lube/slider interaction regime was improved. In this study, first, flying-height modulation (FHM) of the slider was analyzed in the frequency domain by using a fast Fourier transform. Compared with the narrow-grooved slider, a non-grooved slider showed a larger increase in high-frequency modulation of gap flying height when the clearance was reduced to near "zero" at which the slider is starting to interact with lube. Furthermore, by means of drive-level experiments, sector error rate (SER) as a function of flying clearance was investigated. Under a low gap flying height condition, HDDs with the non-grooved slider showed slight SER degradation during slider/lube interaction. However, the narrow-grooved slider did not show any SER degradation at the same gap flying height; the damping effect of the narrow-grooved slider suppressed high-frequency FHM, thereby preventing SER degradation in the slider/lube interaction region.

Original languageEnglish
Pages (from-to)1597-1606
Number of pages10
JournalMicrosystem Technologies
Issue number9-10
Publication statusPublished - 2012 Sept

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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