| 摘要 |
PURPOSE:To facilitate easy recording, reproduction and erasion each without receiving any limitation for the magnetic material, by forming both a photosensitive film on which the permanent information of a guide track or the like is recorded and a magnetic thin film for magnetooptic storage into a body. CONSTITUTION:An amorphous magnetic thin film 2 composed of various ratios of compositions of the rare earth elements such as Sm, Eu, Gd, Tb, Dy, Ho, Er, etc. and the transition metal elements such as Fe, Co, Ni, etc. is formed by vacuum deposition, sputtering and the like methods on a substrate 1 of glass like the coning microsheet or the like or resin like the polycarbonate, acrylic resin or the like. Then a photosensitive film 3 on which permanent information 5 on a guide track or the like is formed previously is bonded in the film 2. Furthermore, a protective plate 4 made of glass, resin and the like is put over the film 3. In such constitution, the recording, reproduction and erasion can be facilitated without receiving any limitation for the using magnetic material. |
