A thin film cobalt alloy magnetic recording disk has a metal nitride layer located between the disk substrate and the top surface of the disk to provide texturing of the disk at the head-disk interface. The texturing layer is made up of generally contiguous clusters of aluminum nitride (AlN)...http://www.google.fr/patents/US5705287?utm_source=gb-gplus-shareBrevet US5705287 - Magnetic recording disk with metal nitride texturing layer
Magnetic recording disk with metal nitride texturing layer