Smart card
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United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Jun 4, 1998
filing date -
Jun 9, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A smart card includes a transparent circuit board on which an integrated circuit, function switches, a power source, and other parts are mounted, an upper substrate facing the circuit board, upper and lower electrodes respectively located on facing surfaces of upper substrate and the circuit board, orthogonal to each other, orientation films coating the upper and lower electrodes, and a liquid crystal material located and sealed between the upper and lower electrodes.
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