| 摘要 |
<p>A perpendicular magnetic recording disk includes a template layer below a Ru or Ru alloy underlayer UL, with a granular Co alloy recording layer RL formed on the under layer. The granular Co alloy including oxides of one or more of Si, Ta, Ti, Nb, B, C and W. The template layer TL comprises nanoparticles 10, such as Fe3O4 nanoparticles, spaced-apart and partially embedded within a polymer material 20, such as polystyrene having a functional end group, with the nanoparticles protruding above the surface of the polymer material. A seed layer SL1, SL2 covers the surface of the polymer material and the protruding nanoparticles and an underlayer of Ru or a Ru alloy covers the seed layer. The protruding nanoparticles serve as the controlled nucleation sites for the Ru or Ru alloy atoms. The nanoparticle-to-nanoparticle distances can be controlled during the formation of the template layer. This enables control of the Co alloy grain diameter distribution as well as grain-to-grain distance distribution.</p> |
