发明名称 MAGNETIC RECORDING MEDIUM.
摘要 <p>A magnetic recording medium comprising a non-magnetic base (1) having provided thereon a magnetizable layer of two-layered structure composed of a first magnetizable layer (4) and a second magnetizable layer (5) each based on iron oxide magnetic powder. The two magnetizable layers (4) and (5) can reduce bias noise while maintaining regeneration output at a high level over the whole range by properly selecting specific surface area (measured by the BET method) of each magnetic powder, coercive force, residual magnetic flux, and thickness of the layer.</p>
申请公布号 EP0090053(A1) 申请公布日期 1983.10.05
申请号 EP19820902835 申请日期 1982.09.27
申请人 SONY CORPORATION 发明人 KUBOTA, ISAO SONY CORPORATION
分类号 G11B5/716;(IPC1-7):11B5/70 主分类号 G11B5/716
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