发明授权
- 专利标题： Magnetic recording medium and a method of fabricating the same
- 专利标题（中）： 磁记录介质及其制造方法
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申请号： US902869申请日： 1992-06-23
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公开(公告)号： US5672425A公开(公告)日： 1997-09-30
- 发明人: Kenichi Sato , Kazunobu Chiba , Yuichi Arisaka , Yukari Yamada
- 申请人： Kenichi Sato , Kazunobu Chiba , Yuichi Arisaka , Yukari Yamada
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX3-159167 19910628; JPX3-359089 19911228
- 主分类号： G11B5/66
- IPC分类号： G11B5/66 ; G11B5/72
摘要：
A magnetic recording medium comprised of a nonmagnetic support; a magnetic metal thin film formed on one major surface of the nonmagnetic support; and a protective film of a corrosion-resistant metal or a multilayer protective film structure consisting of a corrosion-resistant metal film and a durable protective film of a hard material. A multilayer protective film structure is formed by sputtering a corrosion-resistant protective film and a durable protective film over the magnetic metal thin film while the nonmagnetic support travels along the circumference of a cooling cylinder by using at least one target of a corrosion-resistant metal and at least one target of a hard material, or by using a composite target composed of at least one corrosion-resistant metal and one hard material. The protective film suppresses the corrosion of the magnetic metal thin film and improves the corrosion resistance and durability of the magnetic recording medium.
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