Investigation of head-disk contact using disks contaminated with glass beads

Minoru Takahashi; Masayoshi Shinohara; Takayuki Yamamoto; Kazunori Tsuchiya

doi:10.1117/12.19633

1 August 1990 Investigation of head-disk contact using disks contaminated with glass beads

Minoru Takahashi, Masayoshi Shinohara, Takayuki Yamamoto, Kazunori Tsuchiya

Author Affiliations +

Proceedings Volume 1248, Storage and Retrieval Systems and Applications; (1990) https://doi.org/10.1117/12.19633
Event: Electronic Imaging: Advanced Devices and Systems, 1990, Santa Clara, CA, United States

Abstract

In a magnetic disk system, the distance between the head and the disk is reduced as much as possible to increase the recording density. As the distance decreases, contact between the head and the disk becomes more and more likely. We have studied conditions leading to contact between head and disk in an effort to decrease the likelihood of contact. We experimented with a piezoelectric transducer on the back of the head slider as a contact sensor. We also construct a contamination system which issues glassbead particles at a controllable rate. We studied the relation between particle concentration and head/disk contact using this system. We also evaluated head flying characteristics over particle-contaminated disk surfaces, and tested contaminated disk surfaces in high-velocity head sliding contact.

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Minoru Takahashi, Masayoshi Shinohara, Takayuki Yamamoto, and Kazunori Tsuchiya "Investigation of head-disk contact using disks contaminated with glass beads", Proc. SPIE 1248, Storage and Retrieval Systems and Applications, (1 August 1990); https://doi.org/10.1117/12.19633

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