Circuit-like metallic foil sheet and the like and process for producing them
First Claim
1. A process for fabricating a circuit-like metallic foil sheet for resonant tag and the like,said process using a laminate comprising a carrier sheet such as a paper or a plastic film having adhered thereto a metallic foil as the base material, andsaid process comprising:
- patterning the metallic foil of said laminate using a stamping die to provide a predetermined circuit-like pattern on the metallic foil;
disposing the surface of a support opposed to the side of said laminate having thereon the metallic foil; and
transferring the circuit-like metallic foil to the surface of the support by heating only said circuit-like patterned portion from the carrier sheet side of said laminate or from the support side.
1 Assignment
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Accused Products
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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Citations
15 Claims
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1. A process for fabricating a circuit-like metallic foil sheet for resonant tag and the like,
said process using a laminate comprising a carrier sheet such as a paper or a plastic film having adhered thereto a metallic foil as the base material, and said process comprising: -
patterning the metallic foil of said laminate using a stamping die to provide a predetermined circuit-like pattern on the metallic foil; disposing the surface of a support opposed to the side of said laminate having thereon the metallic foil; and transferring the circuit-like metallic foil to the surface of the support by heating only said circuit-like patterned portion from the carrier sheet side of said laminate or from the support side. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 15)
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4. A process for fabricating a circuit-like metallic foil sheet, said processing comprising:
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providing a predetermined circuit-like pattern on a metallic foil of a first laminate comprising a carrier sheet adhered thereto the metallic foil, by means of patterning using a stamping die; superposing on said patterned first laminate, a second laminate comprising a carrier sheet adhered thereto a metallic sheet being patterned by means of patterning using a stamping die; and heating only said circuit-like patterned portions from the carrier sheet side of either or both of the first and the second laminates, thereby forming circuit-like metallic foils on both sides of said support with hot-melt adhesive films being interposed therebetween.
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12. A process for fabricating a circuit-like metallic foil sheet useful as a resonant tag comprising:
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providing, by means of patterning using a stamping die, a predetermined circuit-like pattern on a metallic foil of a first laminate comprising a carrier sheet having adhered thereto the metallic foil and having further thereon a hot-melt adhesive dielectric resin film; superposing on said patterned first laminate, a second laminate comprising a carrier sheet adhered thereto a metallic sheet having being patterned by means of patterning using a stamping die; and heating only said circuit-like patterned portions from the carrier sheet side of either or both of the first and the second laminates, thereby forming circuit-like metallic foils on both sides of said support with hot-melt adhesive dielectric resin films interposed therebetween. - View Dependent Claims (13)
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14. A process for fabricating a circuit-like metallic foil sheet having utility as a resonant tag, said processing comprising:
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providing a predetermined circuit-like pattern on a metallic foil of a first laminate comprising a carrier sheet having adhered thereto the metallic foil, by means of patterning using a stamping die; superposing on said patterned first laminate, a second laminate comprising a carrier sheet having adhered thereto a metallic sheet being patterned by means of patterning using a stamping die; and heating only said circuit-like patterned portions from the carrier sheet side of either or both of the first and the second laminates, thereby forming circuit-like metallic foils on both sides of said support with hot-melt adhesive films being interposed therebetween to form a resonant tag.
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Specification