发明名称 |
Recording medium including protection layer having unequal property |
摘要 |
A first protection layer is overlaid on the surface of a recording layer in a recording medium. A second protection layer is overlaid on the surface of the recording layer at a position adjacent the first protection layer. The second protection layer has a composition different from that of the first protection layer. The first and second protection layers have different compositions, so that the overall protection layer is allowed to have an unequal property. The second protection layer may have a hardness higher than that of the first protection layer. A higher hardness of the second protection layer serves to avoid damages on the surface of the recording medium rather than the first protection layer. The recording medium can reliably be protected from collision or contact of an object.
|
申请公布号 |
US7501192(B2) |
申请公布日期 |
2009.03.10 |
申请号 |
US20040919468 |
申请日期 |
2004.08.17 |
申请人 |
FUJITSU LIMITED |
发明人 |
MUSASHI TAKAYUKI;KASAMATSU YOSHIHARU |
分类号 |
G11B5/66;G11B5/68;G11B5/72;G11B5/725 |
主分类号 |
G11B5/66 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|