Particulate Magnetic Disks With Concentric Particle Strands
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
For a servo system, as described in principle in the IBM Technical Disclosure Bulletin 22, 8A, 3268 (January 1980), the magnetizable particles are compressed by a high magnetic field, changing periodically in a radial direction, to form circular strands of a particular width in the coating. Particulate magnetic disks are spin-coated with magnetic ink. The magnetic particles are subsequently aligned in parallel in the field of an orientation magnet while the coating is still moist. The known window effect is utilized to structure the particulate magnetic disk for servo applications. For that purpose, each particle strand constitutes a track. The particle strands are formed as follows.