Device for writing high density data on a magnetic medium
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United States of America Patent
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Aug 9, 1988
Issued Date -
N/A
app pub date -
Mar 18, 1987
filing date -
Oct 22, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device and method for writing data on a magnetic medium (SMI) are disclosed for use in connection with a recording layer (CMI1) made from an anisotropic material having the axis of easy magnetization perpendicular to its surface and which moves past at least one magnetic writing transducer (TMI). According to the invention, this device is characterized by the fact that the transducer comprises two adjoining writing poles (PEI1, PEI2) having opposite polarities and supplying simultaneously, in a direction (Oz) parallel to the surface of the layer and perpendicular to the base material's direction of motion, magnetic writing fields (Hy) which are normal to the surface of the layer with opposite polarity. The device is particularly applicable for writing data on a magnetic disc adapted for opto-electronic readout.
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