STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
FIELD OF THE INVENTION
The present invention relates to the manufacture of wireless transponder units such as those employed in smart cards having contactless functionality.
BACKGROUND OF THE INVENTION
The following U.S. patent documents are believed to represent the current state of the art: U.S. Pat. Nos. 7,278,580; 7,271,039; 7,269,021; 7,243,840; 7,240,847 and 7,204,427,
DE 44 10 732 A1 discloses a method for the manufacture of a smart card and a smart card comprising an IC and a coil comprising transponder unit. The method comprises the connecting of one end of the coil wire to a contact pad of the IC, the laying and connecting of the coil wire onto/to a substrate and the connecting of the second end of the coil wire to a contact pad of the IC. The laying of the coil wire and the connecting to the contact pads is performed by a combined wire dispense needle and bonding device which is movable in three dimensions relative to the substrate.
U.S. Pat. No. 5,809,633 A teaches a method for producing a smart card module in which again comprises bonding a first end of a wire onto a contact zone of a semiconductor chip, guiding the wire in a plurality of turns to form an antenna coil and bonding a second end of the wire to a second contact zone of a semiconductor chip. The antenna coil and the chip are then placed on a Carrier body. The independent claims are delimited against this document.
DE 44 21 607 A1 concerns a process the manufacture of a smart card, where a preformed wire coil is placed on and subsequently integrated into a carrier foil. Afterwards an IC gets connected to the ends of the wire coil via bonding wires.
DE 10 2006 001 777 A1 discloses a method for the manufacture of a device containing a transponder unit. The devices comprises metal wire coil and a IC chip connected to the coil, wherein the coil is at least partly embedded into a thermoplastic material by the heat generated from the application of electric current to the coil.
SUMMARY OF THE INVENTION
The present invention seeks to provide improved methods of manufacturing wireless transponder units useful as smart card inlays.
The invention is defined by the independent claims. Preferred embodiments are set out in the dependent claims.
The present invention will be understood and appreciated more fully from the following, detailed description, taken in conjunction with the drawings in which:
FIGS. 1A, 1B, 1C & 1D are simplified illustrations of four steps in a method for manufacture of a wireless transponder in accordance with the prior art;
FIGS. 2A & 2B are simplified illustrations of a method for manufacture of a wireless transponder in accordance with the prior art;
FIGS. 3A, 3B and 3C are together a simplified illustration of a method for manufacture of a wireless transponder in accordance with the prior art;
FIGS. 4A and 4B are simplified illustrations of two steps in a method for manufacture of a wireless transponder in accordance with the prior art;
FIGS. 5A and 5B are simplified illustrations of two steps in a general method for manufacture of a wireless transponder in accordance with the prior art;
FIGS. 6A, 6B, 6C, 6D and 6E are simplified illustrations of one example of carrying out the general method of FIGS. 5A & 5B;
FIGS. 7A and 7B are simplified illustrations of two steps in a general method for manufacture of a wireless transponder in accordance with an embodiment of the present invention;
FIGS. 8A, 8B, 8C, 80, 8E, 8F, 8G and 8H are simplified illustrations of one example of carrying out the general method of FIGS. 7A & 7B;
FIGS. 9A and 9B are simplified illustrations of two steps in a method for manufacture of a wireless transponder in accordance with a comparative example not forming an embodiment of the present invention; and
FIGS. 10A, 10B, 10C, 10D and 10E are simplified illustrations of one example of carrying out the general method of FIGS. 9A & 9B.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The description which follows includes several embodiments which may be employed singly or in any combination in the manufacture of a wireless transponder, such as that used in a smart card inlay or any other suitable device.
Reference is now made to FIGS. 1A, 1B, 1C & 1D, which are simplified illustrations of steps in a method for manufacture of a wireless transponder in accordance with the prior art
In the process for manufacturing a smart card inlay as shown in FIGS. 1A-1D, FIG. 1A shows an apertured card substrate 100, including an aperture 102, and a chip module 104 about to be mounted in the aperture 102. FIG. 1B shows chip module 104 mounted in the aperture 102 and also illustrates initially connecting a first end 106 of a wire antenna 108 to a terminal 110 of chip module 104. FIG. 1C illustrates the stage of thereafter fixing the wire antenna 108 onto substrate 100 and FIG. 1D illustrates the stage of thereafter connecting a second end 112 of the wire antenna 108 to the chip module 104.
Reference is now made to FIGS. 2A & 2B, which are simplified illustrations of a method for manufacture of a wireless transponder in accordance with the prior art.
In the process for manufacturing a smart card inlay as shown in FIGS. 2A and 2B, a first end 200 and a second end 202 of a wire antenna 204 are initially connected to a chip module 206, such that the first end 200 and the second end 202 do not extend past the chip module 206. The wire antenna 204 may be fixed to a substrate 208 before or after connection to the chip module 206. Substrate 208 preferably includes suitable apertures for the placement therein of chip modules 206 of wire antennas 204.
Reference is now made to FIGS. 3A, 3B and 3C, which together are a simplified illustration of a method for manufacture of a wireless transponder in accordance with the prior art.
In the process for manufacturing a smart card inlay as shown in FIGS. 3A-3C, a substrate 300 is removably mounted onto a movable surface 302 and is moved relative to a fixed wire embedding device 304 for connecting first and second ends of a wire antenna 306 to a chip module 308 and fixing the wire antenna 306 to substrate 300.
It is appreciated that the technique of FIGS. 3A-3C may be employed in combination with any other suitable one of the embodiments of the present invention or suitable combinations thereof.
Reference is now made to FIGS. 4A and 4B, which are simplified illustrations of two steps in a method for manufacture of a wireless transponder in accordance with the prior art.
In the process for manufacturing a smart card inlay as shown in FIGS. 4A & 4B, FIG. 4A shows attaching a wire antenna 400, having first and second ends 402 and 404 respectively, to a substrate 406 where the first and second ends 402 and 404 are not adjacent the chip module area 408 in the substrate 406 and FIG. 4B shows thereafter relocating the first and second ends 402 and 404 of wire antenna 400 to locations suitable for attachment to a chip module (not shown). It is appreciated that a chip module (not shown) is preferably placed in chip module area 408 for attachment to first and second ends 402 and 404 of wire antenna 400. The chip module may be placed in chip module area 408 either before or after first and second ends 402 and 404 of wire antenna 400 are relocated.
Reference is now made to FIGS. 5A and 5B, which are simplified illustrations of two steps in a general method for manufacture of a wireless transponder in accordance with the prior art.
In the method for manufacturing a smart card inlay as shown in FIGS. 5A & 5B, FIG. 5A illustrates connecting first and second ends 500 and 502 of a wire antenna 504 to a chip module 506 and fixing the wire antenna 504 to a substrate 508 and FIG. 5B illustrates thereafter relocating the chip module 506 to a chip module location 510 on the substrate 508.
A manual manufacturing process suitable for carrying out the general method of FIGS. 5A and 5B is illustrated in FIGS. 6A, 6B, 6C, 60 & 6E, it being appreciated that a corresponding automated manufacturing process may readily be provided.
As seen in FIG. 6A, initially a first end 600 of wire 602 used for forming a wire antenna is attached to a first terminal 604 of a chip module 606, while the chip module 606 is located at a location other than the intended location 608 of the chip module 606, which may be an aperture formed on a substrate 610.
FIGS. 6B and 6C together show a wire antenna 612 being formed from wire 602 on substrate 610 and FIG. 6D shows attachment of a second end 613 of wire 602 to a second terminal 614 of chip module 606 subsequent to formation of the wire antenna 612 on substrate 610.
FIG. 6E shows subsequent relocation of the chip module 606 to the intended location 608 of the chip module 606 on substrate 610.
Reference is now made to FIGS. 7A and 7B, which are simplified illustrations of two stages in a method for manufacture of a wireless transponder in accordance with an embodiment of the present invention.
In the process for manufacturing a smart card inlay as shown in FIGS. 7A & 7B, FIG. 7A illustrates attaching a wire antenna 700, aside from first end 702 and second end 704 thereof, respectively, to a main substrate 706 and attaching the first and second ends 702 and 704 of the wire antenna 700 to an auxiliary substrate 708. FIG. 7B illustrates a following step of thereafter relocating the auxiliary substrate 708 such that the first and second ends 702 and 704 of the wire antenna 700 are at locations which are suitable for attachment to a chip module 710 on the main substrate 706.
A manual manufacturing process suitable for carrying out the method of FIGS. 7A and 7B is illustrated in FIGS. 8A-8H, it being appreciated that a corresponding automated manufacturing process may readily be provided.
As seen in FIG. 8A, a first end 800 of antenna wire 802 is attached to an auxiliary substrate 804. FIGS. 8B & 8C together show a wire antenna 806 being formed from antenna wire 802 on a main substrate 808 in an otherwise conventional manner, such as by ultrasonic embedding. A chip module aperture 809 is formed in main substrate 808. FIG. 8D shows attachment of a second end 810 of the antenna wire 802, forming the wire antenna 806, to the auxiliary substrate 804.
FIG. 8E shows mounting of a chip module 812 in aperture 809 in the main substrate 808, following formation of the wire antenna 806. Alternatively, the chip module 812 may be placed in aperture 809 before forming wire antenna 806. In a further alternative embodiment, aperture 809 may be obviated and chip module 812 may be placed directly on the main substrate 808.
FIG. 8F shows repositioning of the auxiliary substrate 804 such that portions 814 and 816 of the antenna wire 802, which define first and second ends of the wire antenna 806, overlie corresponding terminals 818 and 820 of chip module 812 on the main substrate 808. FIG. 8G shows attachment of portions 814 and 816 to respective terminals 818 and 820 of chip module 812 and FIG. 8H shows a thus assembled smart card inlay after removal of the auxiliary substrate 804.
Reference is now made to FIGS. 9A and 9B, which are simplified illustrations of two steps in a method for manufacture of a wireless transponder in accordance with a comparative example not forming an embodiment of the present invention.
In the process for manufacturing a smart card inlay as shown in FIGS. 9A & 9B, a holding device 900 initially holds a first end 902 of an antenna wire 904 while a wire antenna 906 is formed therefrom on a substrate 908 by conventional techniques. Following formation of the wire antenna 906 on the substrate 908, a second end 910 of antenna wire 904 is preferably held by the same or another holding device 900. Only thereafter are the ends 902 and 910 attached to corresponding terminals of a chip module 912, as the ends are held by holding device or devices 900 and not attached to substrate 908.
A manual manufacturing process suitable for carrying out the method of FIGS. 9A and 9B is illustrated in FIGS. 10A-10E, it being appreciated that a corresponding automated manufacturing process may readily be provided.
As seen in FIGS. 10A & 10B, a first end 1000 of antenna wire 1002 is held by a first gripper 1004 as a wire antenna 1006 is formed from antenna wire 1002 on a substrate 1008 in an otherwise conventional manner, such as by ultrasonic embedding. FIG. 10e shows a second end 1010 of the antenna wire 1002 being held by a second gripper 1012 following completion of the wire antenna 1006 and FIG. 10D shows ends 1000 and 1010 having been released from grippers 1004 and 1012 respectively following completion of the wire antenna. FIG. 10E shows attachment of ends 1000 and 1010 to respective terminals 1014 and 1016 of a chip module 1018 mounted on substrate 1008.
It is appreciated that second gripper 1012 may be obviated and first gripper 1004 may be configured to grip both first end 1000 and second end 1010 of antenna wire 1002, similar to holding device 900 of FIGS. 9A and 9B. It is also appreciated that a first and second gripper, such as grippers 1004 and 1012, may be used instead of holding device 900 of the embodiment shown in FIGS. 9A and 9B.
It will be appreciated by persons skilled in the art that the present invention is not limited by what has been particularly shown and described hereinabove. Rather, the present invention includes combinations and subcombinations of the various features described hereinabove as well as modifications and variations thereof which will occur to persons reading the foregoing and which are not in the prior art.
Patent Application
20150107092
