International Business Machines Corporation

Hitachi Global Storage Technologies Netherlands B.v.

Connie H Moy

Shanlin Duan

Hang Fai Ngo

Bradley Frederick Baumgartner

James Hammond Brannon

Yu Lo

Norman Chu

Patricia Galindo

Jorge Daniel Colonia

An-Chou Andrew Chen

Roger Yu Lo

Huyen D Do

A calibration method for determining the flying height of a glide slider for disk glide height testing is disclosed. The method utilizes a disk with bumps in situ on a disk glide height tester. The method automatically takes into account disk topography, mounting tolerances, and slider roll.

Glide slider fly height calibration method using disk spin down and slider dynamic scan

A disk for calibrating glide heads utilizes a dual-zone configuration of multiple laser melt bumps having selected heights. Averaging the PZT response over many bumps significantly narrows the response distribution, resulting in greater certainty and correlation of the PZT amplitude to bump height. The multiple calibration bumps are circumferentially arranged on a disk surface at a selected radius in a ring-like manner. A second head cleaning zone is provided near the inner diameter of the disk to provide for increased reproducibility of the PZT calibration response. The second zone is densely textured and serves to clean the glide head prior to its use in the calibration zone.

Apparatus and method for glide height calibration of disk surfaces by use of dual-zone laser texture

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San Jose, CA, United States of America

Connie H Moy