Method of generating micro-topography on a surface
AssigneesAgency of Industrial Science and Technology, Ministry of International Trade & Industry
InventorJun Akedo
Life of this patent
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Abstract
A method of generating micro-topography on a surface comprises the steps of using an analog signal to record a magnetic latent image corresponding to the micro-topography to be formed on the surface of a magnetic medium, applying to the magnetic medium a DC magnetic field weaker than its coercive force, supplying a magnetic fluid to the surface of the magnetic medium and allowing super-fine magnetic particles in the magnetic fluid to be attracted to and deposited on the magnetic medium in accordance with the intensity distribution of the leakage magnetic field from the magnetic latent image, and fixing the super-fine magnetic particles.
Claims8
A method of generating micro-topography on a surface comprising the steps of
- exposing a surface of a magnetic medium to an analog signal corresponding to a surface profile to be formed, thereby forming on the surface of the magnetic medium a leakage magnetic field of an intensity distribution corresponding to the sectional profile to be formed,
- applying a DC magnetic field to the magnetic medium,
- supplying a magnetic fluid containing super-fine magnetic particles dispersed in a solvent to the surface of the magnetic medium to enable the super-fine magnetic particles to be attracted to and deposited on the surface of the magnetic medium in accordance with an intensity distribution of the leakage magnetic field, and
- removing the solvent contained in the magnetic fluid for fixing the super-fine magnetic particles on the surface of the magnetic medium.
Dependencies are inferred from the claim text.