| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a write-once-read-many (WORM) optical recording medium having high sensitivity and suitable for high linear velocity recording, to provide a sputtering target suitable for producing the write-once-read-many optical recording medium, especially the sputtering target capable of improving a layer deposition rate for improving productivity, having high strength during layer formation and high packing density and to provide a method for producing the sputtering target. <P>SOLUTION: (1) In the optical recording medium containing a substrate and a recording layer over the substrate, the recording layer primarily contains Bi and O (oxygen), and further contains B and at least one element X selected from Ge, Li, Sn, Cu, Fe, Pd, Zn, Mg, Nd, Mn and Ni. (2) The sputtering target contains Bi, B and at least one element X selected from Ge, Li, Sn, Cu, Fe, Pd, Zn, Mg, Nd, Mn and Ni. <P>COPYRIGHT: (C)2008,JPO&INPIT |
