Magnetic card
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United States of America Patent
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-
Dec 11, 1990
Issued Date -
N/A
app pub date -
Jun 29, 1988
filing date -
Feb 17, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the subject magnetic card, first magnetic recording layer 2 is laid over substrate 1. First magnetic recording layer 2 has a coercive force that enables magnetic recording of data. Second magnetic recording layer 4, having a coercive force smaller than that of first magnetic recording layer 2, is laid over first magnetic recording layer 2, with shielding intermediate layer 3 interposed therebetween. Magnetic shielding layer 5 is provided as an uppermost magnetic layer.
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