Magnetic recording medium and process for production thereof

Details Magnetic recording medium and process for production thereof Magnetic recording medium and process for production thereof

G - Physics

11

B

117/24.2

G11B 5/66 (2006.01) G11B 5/851 (2006.01) H01F 41/14 (2006.01)

Patent

CA 1164283

Title of the Invention MAGNETIC RECORDING MEDIUM AND PROCESS FOR PRODUCTION THEREOF Abstract of the Disclosure A magnetic recording medium comprising (a) a flexible substrate of a polymeric material, (b) a first magnetic layer of a ferromagnetic metal deposited on the substrate by an ionized cluster beam deposi- tion method, and (c) a second magnetic layer of a ferromagnetic metal deposited on the first magnetic layer by a high-vacuum ion plating deposition method, and a process for producing a magnetic recording medium which comprises imparting a kinetic energy in the range of 100 eV to 10 KeV to an ionized cluster composed of ferromagnetic metal atoms in a high vacuum corresponding to a pressure of 8 x 10-4 to 1 x 10-10 torr and impinging the resulting ionized cluster beam against a flexible substrate of a polymeric material to deposit a first magnetic layer of the ferromagnetic metal on the substrate, and imparting a kinetic energy in the range of 1 eV to 10 KeV to atom ions of a ferromagnetic metal by an ion plating method in a high vacuum corresponding to a pressure of 8 x 10-4 to 1 x 10-10 torr, and impinging the resulting atom ion beam against the first magnetic layer to deposit a second magnetic layer of the ferromagnetic metal on the first magnetic layer.

383706

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