Particulate Magnetic Storage Medium
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-08
A heatable planar molding tool 1, 2 is used to mold plastic foils 3, 4, which are pigmented with magnetic particles, and, if necessary, liquid resin with a plastic core 5 preferably consisting of fiber-reinforced plastic prepregs. After the molding tool 1, 2 has been heated by heater 6 and the resin components have started to flow, a strong inhomogeneous static or rotating magnetic field H is applied. This causes the magnetic particles to be aligned in the desired direction and to rise to the surface. As a result, there is a high particle density which, in turn, affords a higher bit density close to the surface.