A TRIBOLOGICAL STUDY OF NEW HEAD-PAD SLIDERS FOR A Co-Cr LAYERED FLEXIBLE DISK SYSTEM

Abstract

Abstracts---Both axial runout and signal durability of a Co-Cr/Permalloy flexible disk with diameter 3.5", were studied using a disk drive with a pair of pads arranged in series relative to the disk radial direction, and with a single-pole type head.In the drive, the radial position of the head was 35 mm at disk revolution rates ranging from 600 to 1200 rpm, to evaluate the effect of the pad configuration on the runout characteristics and read-write properties. The runout of the disk were suppressed less than 10 ~m, and frequency spectra of the suppressed runout were observed up to ~ KHz. Stable read-write characteristics of the disk were observed in the high-density region over 70 kfci under a head pressure of about 3 mN and runout of less than 10 ~m.An out-put signal loss over 70 kfci was less than 1 dB after 7 million times of the head passes.No scrutches were observed on the disk surface and the head-pad sl iders after the durability test.