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Magnetic Media for Backside Recording

IP.com Disclosure Number: IPCOM000047269D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Chamberlin, TJ Johnson, OD Kahwaty, VN [+details]

Abstract

Magnetic transitions recorded on a magnetic medium can be very broad, especially when the recording head is on the backside of the tape, as shown in Fig 1, where the non-magnetic substrate is holding the magnetic medium away from the highest magnetic field gradients produced by the magnetic head. In magnetic tapes where strong transitions and strong signals are desired, as in magnetic printing, a medium with a high magnetic material content is often used, which usually takes a high magnetic flux to saturate the medium. When the medium is spaced from the head as shown, the fields the magnetic head is able to produce may only partially record the layer of the medium. This condition, as seen from the front side of the tape, could prove unsatisfactory in terms of the transitions above the surface.