Circuit-like metallic foil sheet and the like and process for producing them
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United States of America Patent
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Jul 8, 1997
Grant Date -
N/A
app pub date -
Dec 30, 1994
filing date -
Dec 30, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A circuit-like metallic foil sheet for resonant tags and the like, and a process for fabricating the same. The circuit-like metallic foil sheet is fabricated by a process comprising: fabricating a laminate by adhering, to a carrier sheet such as a paper or a plastic film, a metallic foil whose surface is coated with hot-melt adhesive resin film, using an adhesive whose adhesion force decreases by heating; stamping out the metallic foil of the laminate to provide thereto a predtermined circuit-like pattern using a stamping die; superposing the metallic foil side of the laminate on a support such as a plastic film: and trasnferring the circuit-like metallic foil to the surface of the support by heating the circuit-like pattern from the support side or the carrier sheet side. A circuit board comprising a resonant circuit or a printed wiring circuit can be obtained with high precision without employing an etching process in which chemicals are used.
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