Invention Grant
- Patent Title: Magnetic recording medium
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Application No.: US869483Application Date: 1986-06-02
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Publication No.: US4678721APublication Date: 1987-07-07
- Inventor: Friedrich J. A. den Broeder , Henricus J. G. Draaisma , Alexander Kahle
- Applicant: Friedrich J. A. den Broeder , Henricus J. G. Draaisma , Alexander Kahle
- Applicant Address: NY New York
- Assignee: U.S. Philips Corporation
- Current Assignee: U.S. Philips Corporation
- Current Assignee Address: NY New York
- Priority: NLX8600869 19860407
- Main IPC: G11B5/64
- IPC: G11B5/64 ; G11B5/65 ; G11B5/66 ; G11B5/673 ; G11B5/85 ; B21C37/00
Abstract:
The invention provides a magnetic recording medium comprising a substrate of a nonmagnetic material bearing a thin magnetic layer with perpendicular anistropy. The magnetic thin layer comprises alternate layers of Pd and Co. The signal-to-noise ratio upon reading the stored information is considerably improved in that the thicknesses of the individual layers of Pd are between 0.2 and 2.0 nm and that the individual layers of Co consist of at least one monolayer of Co atoms and have thicknesses which are smaller than 0.3 nm.The thin magnet layer may be manufactured, for example, by electron beam vacuum vapor deposition of the individual layers of Pd and Co.
Public/Granted literature
- US5741104A Steel fastener having grooved shank Public/Granted day:1998-04-21
Information query
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