Curing a Polymer Magnetic Thin Film on a Magnetic Disk Substrate
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
Polymer magnetic thin films are cured by being subjected to microwave treatment under particular conditions. This treatment permits curing thin films with layer thicknesses of about 1 mm. So far, after spin-coating of the liquid magnetic compound, magnetic disks have been heated in a circulating air oven for cross-linking and curing the polymer of the magnetic film. The high energy consumption, which is largely attributable to the heat capacity of the aluminum substrate, makes this step very expensive. It is also known to heat and cure polymers in an HF field, which has been tested for polymer films with a layer thickness of > 0.1 mm. Surprisingly, this principle is also suitable for curing thin magnetic films with thicknesses of about 1 mm, as are generally employed for the production of magnetic disks.