Plural-coil non-contact IC card having pot cores and shielding walls
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United States of America Patent
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Mar 30, 1993
Grant Date -
N/A
app pub date -
Nov 27, 1990
filing date -
Nov 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a non-contact IC card based on an electromagnetic induction system, N small thin-film coils formed by thin-film technology are arranged to perform N-bit parallel data transfer at an increased data transfer rate. Each thin-film coil may be constructed with a pot core to solve a problem relating to errors in positioning the card relative to a terminal unit and thereby improving the reliability of data transfer. Shielding walls may be provided between the adjacent thin-film coils to prevent interference therebetween. The N thin-film coils are integrally formed as a thin-film coil module.
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