Portable dual-interface data carrier with metal frame

Abstract

A portable dual-interface data carrier contains a metal sheet which can be provided with low technical effort and especially no ferrite material is required. The resulting portable dual-interface data carrier is more heavy than a state of the art PVC smart card and provides contact based interface on one side, whereas contactless interfaces is working from both sides of the card. One application domain of the data carrier is to provide a so-called smartcard. The present invention is furthermore directed towards a dual-interface module as well as towards a method for providing a portable dual-interface data carrier. Moreover, a data carrier is suggested comprising instructions for performing the suggested method and for manufacturing the portable dual-interface data carrier.

Claims

1. A portable dual-interface data carrier, comprising: a metal layer being arranged between at least two plastic layers to form at least a part of a body of the data carrier, wherein the metal layer comprises a recess at least of a size of a carrier foil holding an antenna; and that the carrier foil is attached to one plastic layer at a position of the recess and the carrier foil holding the antenna is inserted into the recess.

2. The data carrier according to claim 1, wherein the at least two plastic layers comprise at least one transparent foil and/or at least one opaque foil.

3. The data carrier according to claim 1, wherein the carrier foil has a thickness at least of the same thickness as the metal layer.

4. The data carrier according to claim 1, wherein the size of the carrier foil holding the antenna does not exceed the size of the recess.

5. The data carrier according to claim 1, wherein the size of the carrier foil holding the antenna is smaller than the size of the recess and a gap between the recess and the plastic layer carrying the antenna is filled with a filling material.

6. The data carrier according to claim 1, wherein the layers are laminated to form the body of the data carrier.

7. The data carrier according to claim 1, wherein the layers are adhered by means of an UV adhesive to form the body of the data carrier.

8. The data carrier according to claim 1, wherein the antenna is attached to further components of the data carrier.

9. The data carrier according to claim 1, wherein the data carrier carries further components for establishing a contact-based interface.

10. The data carrier according to claim 1, wherein the antenna forms the contactless interface of the data carrier.

11. The data carrier according to claim 1, wherein the carrier foil is attached to a plastic layer by means of an adhesive layer.

12. The data carrier according to claim 1, wherein the carrier foil is provided in cured liquid form.

13. A dual interface module for insertion into a data carrier according to claim 1.

14. The data carrier according to claim 1, wherein the data carrier comprises an interface module, the interface module comprising the carrier foil, the antenna, and connection units, the connection units being configured to connect the antenna with the components of the data carrier, and the recess extends across a width that is the same as or greater than a width of the interface module.

15. The data carrier according to claim 1, wherein the data carrier does not include ferrite material.

16. The data carrier according to claim 1, wherein the recess extends across a center of the metal layer.

17. A data carrier comprising: a metal layer arranged between a first plastic layer and a second plastic layer, the metal layer, the first plastic layer, and the second plastic layer being arranged to form at least a part of a body of the data carrier, wherein the data carrier is a portable dual-interface data carrier, the metal layer and the first plastic layer define a recess, the recess having at least a size of a carrier foil holding an antenna, the carrier foil holding the antenna is arranged at a position of the recess and inserted into the recess.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages of the present invention are explained in the context of the accompanying figures, which show:

(2) FIG. 1: the overall structure of the portable dual-interface data carrier according to an aspect of the present invention;

(3) FIG. 2: an intermediate product of the suggested dual-interface data carrier according to a further aspect of the present invention;

(4) FIG. 3: the suggested dual-interface module to be inserted into the data carrier according to a further aspect of the present invention;

(5) FIG. 4: the interface module being inserted into the recess thereby forming a gap according to an aspect of the present invention;

(6) FIG. 5: the end product of the portable dual-interface data carrier according to a further aspect of the present invention;

(7) FIG. 6: a metal sheet being used when manufacturing a variety of portable dual-interface data carriers according to an aspect of the present invention; and

(8) FIG. 7: a schematic flowchart depicting the method for providing a portable dual-interface data carrier according to an aspect of the present invention.

DETAILED DESCRIPTION

(9) FIG. 1 shows the general structure of the data carrier according to the present invention, where a first plastic layer 1 is provided on top and a second plastic layer 3 is provided on the back side of the card. In between both layers 1 and 3 a further layer, namely metal layer 2, is provided. As can be seen in FIG. 1, the overall structure is a so-called sandwiched structure, where the metal layer 2 is inserted in between the two plastic layers 1, 3.

(10) The arrangement depicted by FIG. 1 may likewise comprise a PVC foil 1 and/or a PVC foil 3 which can be opaque with colored PVC. Likewise the PVC foil 1 and/or 3 can be coated with a thin metallic film to create a full face foil effect. The stack of FIG. 1 can be laminated or embedded by further layers of PVC, may they be opaque or transparent, to generate standard smart cards with a thickness according to ISO, ANSI, CQM requirements of about 760-840 m.

(11) The layer arrangements can likewise be sandwiched between PVC layers, which again can be transparent. Consequently, above layer 1 and below layer 3 an additional PVC layer can be arranged which potentially provides a protective coating.

(12) As can be seen on the left and right side of FIG. 1 the metal layer 2 is visible from both sides such that when the card body is cut out of a respective sheet the metal edge can be seen from at least one side of the card body. Hence, the smart card comprises a metal layer being embedded such that the card body shows a metal edge at the side of the cards after cut from the finished laminated sheet. The metal edge on at least one side of the card is visible during usage and provides stability to the card edges and moreover establishes a design which communicates the high quality of the card as such.

(13) Summarizing this issue the overall structure as depicted by FIG. 1 comprises metal edges on both sides which are visible to the user.

(14) FIG. 2 shows the metal layer 2 with a recess 4 being provided in a frame-like structure. The metal layer 2 can be provided using large metal sheets and can be separated to form individual metal layers 2. The window structure of the recess as depicted in FIG. 2 is only one example, which is not limiting. However, such a window-like dimension is preferred.

(15) FIG. 3 shows the interface module which is to be inserted into the metal layer 2. The interface module comprises a carrier foil 5 with the antenna 6. For connecting the antenna 6 with further components of the data carrier, connection units 7 are provided which may be used for bonding the antenna with further contact-based components.

(16) The connection unit 7 may be used for a connection with interface modules as depicted by FIG. 5, for instance interface modules 10. The carrier foil shall have the thickness of the metal layer 2. The carrier foil 5 may be provided using larger sheets from which single carrier foils are extracted. Such a separation can be performed by punching, laser cutting or waterjet cutting. This might likewise hold true for further layers which are to be separated, such as the plastic layer.

(17) FIG. 4 shows a gap 8 in between the recess 4 and the carrier foil 5. Such a gap can be filled using liquid filling material, which is cured later on. Furthermore, the cover foil 1 can be introduced using an adhesive. Finally, the composite layers can be joint together using temperature and pressure such as applied during laminating. Furthermore, UV adhesive can be used instead or additionally. In this way no heat is applied towards the single layers in case no lamination is accomplished.

(18) The dual-interface module 10 is then introduced into the card 9, which may be provided as the suggested data carrier. This arrangement is depicted by FIG. 5.

(19) In general, the recess 4 of the metal layer 2 can be arranged such that the antenna 5 is provided as one component comprising the carrier foil 5 and the antenna 6. In this way a composite antenna foil 5 is established. Likewise, the recess 4 can be filled with material resulting in the foil which carries the antenna. Such a liquid material may be liquid PVC and upon curing the antenna 6 including bonds 7 can be applied. Furthermore, a plastic cover layer 1 can be attached to the composite structure.

(20) Advantages of the present invention comprise that contactless data transmission functionality of the card can be provided on both sides of the card and furthermore, no expensive ferrite is used.

(21) FIG. 6 shows a metal sheet 2A which is used to provide the metal layer 2. The metal sheet 2A may comprise recesses 4, which are punched, and in a further step the metal layer 4 is punched out of the metal sheet 2A. In this way large amounts of metal layers can be produced. A similar procedure can be applied for providing the plastic layers. The layers to be punched out are demonstrated by reference sign 11.

(22) FIG. 7 shows a flowchart of the method for providing the portable dual-interface data carrier comprising the steps of forming 100 a metal layer 2 comprising a recess 4 at least the size of a carrier foil 5 holding an antenna 6, attaching 101 the carrier foil 5 holding the antenna 6 to a plastic layer 1, 3 at a position of the recess 4 and inserting 102 the carrier foil 5 holding the antenna 6 into the recess 4 thereby forming at least a part of the body of the data carrier.

(23) As indicated above, the suggested method may comprise further substeps and especially steps may be performed iteratively and/or in a different order.