Thin radio frequency transponder with leadframe antenna structure
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United States of America Patent
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-
Jul 28, 1998
Grant Date -
N/A
app pub date -
Mar 25, 1996
filing date -
Mar 25, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A novel radio frequency transponder (tag) with a minimum of components and connects is thin and flexible because these components and connects can be unsupported by a substrate layer. This is accomplished by using a conducting leadframe structure not only as a connection medium but also as a circuit element, i.e., the transponder antenna. In various preferred embodiments, the leadframe is mechanically positioned and fixably attached to a circuit chip so that the leadframe (antenna) is self supporting. A protective coating can be added where the leadframe is attached to the circuit chip. Further a protective surrounding can envelops the entire leadframe antenna, circuit chip, and, if provided, the protective coating.
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