| 摘要 |
PURPOSE:To obtain a recording material with excellent durability, by causing an amorphous optical recording material provided on a base to comprise at least one transition metal selected from the group consisting of Fe, Co and Ni, and BN. CONSTITUTION:To provide a thin film of a recording material, sputtering may be conducted with a target constituted of an alloy or sintered body of a composition comprising 97-80 atom% of at least one transition metal selected from the group consisting of Fe, Co and Ni and 3-20 atom% of BN, or sputtering nay be conducted by placing a chip of BN on a target constituted of the transition metal. Further, binary vapor deposition of the transition metal and BN may be conducted by using electron beams. If the amount of BN is less than 3 atom%, durability of the product is lowered, though bubbles can be formed by separately semiconductor laser. On the other hand, if the amount of BN exceeds 20 atom%, a bubble-forming ability is poor, and durability of the resultant medium to thermal expansion is lowered. When a heat-absorbing layer comprising SiO2 is provided in a film thickness of 500 Angstrom between the base and the thin film, sensitivity is enhanced. |
