| 摘要 |
PURPOSE:To obtain a disk which is hard in its surface hardness and in addition, is difficult for dust to stick by providing a protection layer which is constituted of the mixture of ultraviolet ray hardening resin and inorganic substance, and in addition, is conductive. CONSTITUTION:The surface of a disk-shaped based plate 1 provided with a recording film 5 on an uneven pattern is coated in the shape of a disk with the mixture 2 of the ultraviolet ray hardening resin and alumina prepared beforehand, and a stamper 3 of a flat surface is put upon it. Then, the mixture 2 of the ultraviolet ray hardening resin and the alumina is spread out by applying load over 10 kg to the whole base plate from the upper part. After that, it is irradiated by ultraviolet rays 4, and the mixture of the ultraviolet ray hardening resin and the alumina is hardened, and when the stamper 3 is removed, the protection film by the mixture of the ultraviolet ray hardening resin and the alumina is formed on the recording film 5 of the base plate. Thus, the disk protection film whose surface hardness is high and uniform, and in addition, which is difficult for the dust to stick is manufactured. |
