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Orienting Magnetic Particles in a Magnetic Recording Media

IP.com Disclosure Number: IPCOM000095124D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Haines, RS: AUTHOR

Abstract

Magnetic recording media commonly comprise a flexible carrier of nonmagnetic material upon which is disposed a binder matrix containing magnetic particles. The magnetic characteristics of the media are enhanced by orienting the magnetic particles so as to reinforce one another. Orientation normally takes place by passing the substrate coated with still-liquid binder over a permanent or DC magnet which serves to orient the magnetic particles.

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Orienting Magnetic Particles in a Magnetic Recording Media

Magnetic recording media commonly comprise a flexible carrier of nonmagnetic material upon which is disposed a binder matrix containing magnetic particles. The magnetic characteristics of the media are enhanced by orienting the magnetic particles so as to reinforce one another. Orientation normally takes place by passing the substrate coated with still-liquid binder over a permanent or DC magnet which serves to orient the magnetic particles.

This method of orientation can be enhanced by utilizing an ultrasound activated horn to vibrate the magnet or the carrier in the vicinity of the magnet. The vibrations caused by the ultrasound activation reduce the viscosity of the binder and increase its flowability during the time it is in the orienting magnetic field. Thus, increased orientation of the magnetic particles is allowed.

This arrangement also produces flowability in binders which would, otherwise be too rigid to allow particles to be oriented.

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