Surface Texturing of Thin Film Magnetic Recording Media With Evaporated Undercoat
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Feb-15
In order to reduce the static friction (or stiction) in thin film metal alloy or metal oxide magnetic recording disks, it is known to texturize or roughen the substrate. During subsequent film deposition, the upper layer of the disk retains a surface roughness. The texturing of the media can be accomplished by evaporating a metal undercoat onto the substrate. The evaporated metal film produces a uniform micro-roughness so that the subsequently deposited magnetic layers and overcoats replicate this roughness, thereby reducing the static friction between the disk surface and the slider supporting the read/write head. In one embodiment, chromium (Cr) is evaporated onto an aluminum-magnesium alloy substrate having a nickel-phosphorous surface film.