RECORDING CARRIER HAVING RARE EARTH-TRANSITION METAL AMORPHOUS OPTICAL MAGNETIC RECORDING MEDIUM LAYER FORMED ON PLASTIC BASE

摘要

PURPOSE:To form stably a vertical magnetizing characteristic, and to use a plastic base whose use has been considered to be doubtful in respect of stability and reliability in the past, as an optical magnetic recording carrier, by interposing a polymer laye having a strong adhesive property as a plastic base, between a transparent plastic base and a rare earth-transition metal amorphous layer. CONSTITUTION:A transparent plastic base is made of acrylic resin, polycarbonate resin, styrene resin or polyester resin, and a rare earth-transition metal amorphous layer is constituted of a material selected from a group constituted of a Tb-Fe alloy, a Tb, Fe-Co alloy, a Dy-Fe alloy, a Gd-Tb-Fe ally, a Gd-Tb- Dy-Fe alloy and a Gd-Co alloy. A polymer layer is constituted of at least one polymer selected from a group consisting of a polyalkyl compound, a polyfunctional alkyl compound, a thermosetting resin, an alkyl silicate hydrolysate and an organopolysiloxane. An opposite layer and/or a dielectric layer is formed on the surface of a rare earth-transition metal amorphous layer of the opposite side to the polymer layer. The thickness of a polymer layer is set to 0.01-10mu.