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Process for Producing Magnetic Layers Disclosure Number: IPCOM000062672D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09

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Bandara, U Schmidt, C Steiner, W [+details]


A process is described for producing magnetic layers for storage means with uniformly aligned magnetic particles. Magnetic disks are produced by applying a suspension of hard-magnetic elliptical particles in the form of a very thin layer to an aluminum substrate. For a high signal strength and a high bit density, the previously unoriented particles have to be aligned along the circumference of the disk. For that purpose, orientation magnets with a horseshoe-shaped cross-section and a narrow gap are used. By means of these orientation magnets, a high magnetic field is generated within the gap along the circumference of the disk. By turning the disk, while the magnetic field is being applied, the particles on the entire disk are oriented.