IC card having a mica film for stable resonance frequency and enhanced antenna properties
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United States of America Patent
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Apr 12, 2005
Grant Date -
Jul 1, 2004
app pub date -
Dec 17, 2003
filing date -
Jul 29, 1999
priority date (Note) -
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Abstract
An IC card 10A has a mica capacitor that comprises a mica film 1 and electrodes 6a, 6b formed on both sides thereof, where the mica film 1 serves as a mounting substrate for an antenna coil 2 and an IC chip 3, thereby reducing profile of an IC card and also reducing its cost of manufacture and to stabilize its resonance frequency.
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