| 摘要 |
PURPOSE:To enhance the stability of the titled optical recording medium under a high temp. and high humidity environmental condition, by forming the optical recording material by laminating a recording layer, wherein magnetic particles having shape anisotropy are dispersed in a polymer layer so as to be oriented to a definite direction, to a substrate. CONSTITUTION:Magnetic particles 3 are dispersed in a plastic or polymer solution forming a polymer layer 2 is applied to a substrate 1. Subsequently, an external magnetic field is applied to the coating layer at the point of time when the magnetic particles 3 in the coating layer are flowable to cure the polymer coating layer in such a state that regularity is applied to the presence state of the magnetic particles 3 to form an optical recording medium. This optical recording medium is one wherein the recording layer 4 formed by dispersing magnetic particles 3 having shape anisotropy in the polymer layer 2 so as to orient the same to one up-and-down direction is provided on the substrate 1. The magnetic particles comprise gamma-Fe2O3 or Co-gamma-Fe2O3 and the average particle size thereof is pref. 1mum or less. |
