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2. 发明公开

EP0567657A1 MAGNETIC RECORDING MEDIUM AND PRODUCTION METHOD THEREOF 失效
标题翻译： VERFAHREN ZU SEINER HERSTELLUNG的MAGNETISCHERAUFZEICHNUNGSTRÄGER。
公开(公告)号：EP0567657A1
公开(公告)日：1993-11-03
申请号：EP92923983.8
申请日：1992-11-18
申请人： SONY CORPORATION
发明人： CHIBA, Kazunobu , SATO, Kenichi , ARISAKA, Yuichi , KONDO, Hirofumi , YAMADA, Yukari
IPC分类号： G11B5/72 , G11B5/71
CPC分类号： G11B5/725 , G11B5/72 , G11B5/735 , G11B5/8408 , Y10S428/90 , Y10T428/24355 , Y10T428/265 , Y10T428/30 , Y10T428/31721 , Y10T428/31725 , Y10T428/31786
摘要： This invention discloses a magnetic recording medium using a metal magnetic thin film as a magnetic layer. An oxyde layer is formed on the surface of the metal magnetic thin film, and a protective layer is formed further on this oxyde layer. The thickness of the oxyde layer on the metal magnetic thin film is 20 to 230 Å, the thickness of the protective layer is 20 to 230 Å, and the total thickness of the oxyde layer and the protective layer is 40 to 250 Å. Before the protective layer is formed, the surface may be bombarded to improve adhesion of the protective layer. A lubricant can be applied on the surface of the protective layer, as well. Examples of the lubricants are carboxylic acid/perfluoroalkyl esters, ester compounds such as perfluoropolyethers containing a carboxy group, and amine salt compounds. On the other hand, the back of a non-magnetic support as a substrate has a mean coarseness R a at the center line and protrusions having a maximum height R max which satisfy the following relation: 0.0015 µm ≦ R a ≦ 0.0070 µm, 0.015 ≦ R max ≦ 0.070 µm. 8
摘要翻译：本发明公开了一种使用金属磁性薄膜作为磁性层的磁记录介质。在金属磁性薄膜的表面上形成氧化物层，在该氧化物层上形成保护层。金属磁性薄膜上的氧化物层的厚度为20〜230安培，保护层的厚度为20〜230安培，氧化物层和保护层的总厚度为40〜250安培。在形成保护层之前，可以轰击表面以提高保护层的粘附性。也可以在保护层的表面上施加润滑剂。润滑剂的实例是羧酸/全氟烷基酯，酯化合物如含羧基的全氟聚醚和胺盐化合物。另一方面，作为基板的非磁性载体的背面具有在中心线上的平均粗糙度Ra，并且具有满足以下关系的最大高度Rmax的突起：0.0015μmRa =0.0070μm m，0.015≤Rmax<0.070μm。 8

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