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Landing Pads on Air-bearings to Minimize Disk Damge During Load/Unload

IP.com Disclosure Number: IPCOM000014573D
Original Publication Date: 1999-Oct-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Related People

Authors:
Mike Suk Lee Dorius Oscar Ruiz Donald Gillis

Abstract

During load/unload operations, the slider contacts the disk resulting in disk damage. The usual contact points on the slider are the four corners. Landing pads on the corners of the slider will significantly reduce disk damage. The landing pads are formed by ion-milling process which is smoother than the RIE process. Without the landing pads the exposed surfaces would be from an RIE process. The smoother surface reduces contact stresses when contacts do occur. The pads can also alter the static attitude of the slider (i.e., levels the slider to the disk surface) as the slider approaches the disk thus reducing the probability of head/disk contacts. The change in the static attitude is due to the pressurization of the pads during the load process. The pad that is closest to the disk surface experiences air-pressure which pushes the pad (and thus the corresponding corner of th e slider) away from the disk surface. The size of pads are about 150um by 150um and thus they alter the flying height by less than 2 nm during flying conditions. 1