Head-Disk Interfacial Behavior in Glide Tests for Manufacturing Hard Disks

摘要

This study was carried out to investigate the interfacial behavior of a glide head and a bump disk during the glide head calibration for glide tests. The glide test combined with a burnishing process is widely employed by the hard disk industry to test the smoothness of a disk surface. The bump avalanche test using a calibrated glide head and a bump disk results in the bump avalanche curve that graphically shows how the glide test system reacts with the precharacterized asperities (bumps). Experiments were performed to discover the fact that the avalanche point is affected by the Z-height and the tilting angle of the laser bumps on bump disks.