RFID transponders with paste antennas and flip-chip attachment
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United States of America Patent
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-
Jul 10, 2001
Grant Date -
N/A
app pub date -
Nov 19, 1999
filing date -
Nov 19, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A radio frequency transponder is provided which comprises a substrate layer, a radio frequency integrated circuit affixed to said substrate layer; and an antenna provided on said substrate layer in electrical connection with said radio frequency integrated circuit. The antenna is comprised of a conductive paste material having a resistivity of approximately 20 .mu..OMEGA.-cm., which is greater than the resistivity of a conventional etched copper antenna, but still sufficiently low to provide a radio frequency transponder having acceptable read range. The substrate layer further comprises a flexible organic material. The radio frequency integrated circuit is disposed in a flip-chip configuration facing downward toward said substrate layer, with electrical contacts aligned with the antenna.
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Cited Art Landscape
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