Particulate Magnetic Disk With Increased Lifetime
Original Publication Date: 1985-May-01
Included in the Prior Art Database: 2005-Feb-18
High-performance magnetic disks are coated with q Fe2O3-filled resin. To make the disk resistant to the hard magnetic head of ceramic material, which slides along the disk in the start/stop phase, the resin is additionally filled with Al2O3 powder. In actual fact, the magnetic head does not slide directly on the resin but on Al2O3 particles. The poor adhesion of the Al2O3 particles often makes them break out of the resin layer during operation, leading to abrasion, the formation of debris and finally to premature failure of the entire system. A process comprising the following steps is used to make the Al2O3 particles adhere to the magnetic disks. o The magnetic disk is initially produced using conventional techniques; this step includes coating the disk with magnetic ink and curing it.