Contactless data transmission device, security and/or valuable document including the same and method for manufacturing the contactless data transmission device
This present invention serves to simplify manufacture of a contactless data transmission device ( 50 ). This device ( 50 ) has an electrically insulating carrier ( 1 ), a circuit element arranged on the carrier ( 1 ) made from a continuous antenna conductor track ( 2 ) in the form of at least one spiral winding ( 4, 5, 6 ) and respectively one terminal contact ( 15, 16 ) at the ends thereof as well as an electronic component ( 3 ) with at least two contact points ( 11, 12 ) electrically connected with the circuit element. The electronic component ( 3 ) is placed in a mounting region ( 10 ) above the at least one spiral winding ( 4, 5, 6 ). The at least two contact points ( 11, 12 ) of the component ( 3 ) are electrically connected with a respective terminal contact ( 15, 16 ) of the antenna conductor track ( 2 ). At least one spiral winding ( 4, 5, 6 ) is branched outside the mounting region ( 10 ) between two respective branching points ( 7′, 7″; 8′, 8″; 9′, 9 ″) into at least two spiral winding branches ( 4′, 4″; 5′, 5″; 6′, 6 ″). The data transmission device ( 50 ) is a component part of a valuable and/or security document ( 100 ).
1. Contactless data transmission device ( 50 ) which comprises:
an electrically insulating carrier ( 1 ),
a circuit element arranged on the carrier ( 1 ), wherein the circuit element comprises a continuous antenna conductor track ( 2 ) in the form of at least one spiral winding ( 4 , 5 , 6 ) and respectively one terminal contact ( 15 , 16 ) at the ends thereof, and
an electronic component ( 3 ) electrically connected with the circuit element with at least two contact points ( 11 , 12 ), wherein the electronic component ( 3 ) is placed in a mounting region ( 10 ) above the at least one spiral winding ( 4 , 5 , 6 ) and wherein the at least two contact points ( 11 , 12 ) of the electronic component ( 3 ) are electrically connected with a respective terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 ),
wherein at least one spiral winding ( 4 , 5 , 6 ) is branched outside the mounting region ( 10 ) between two respective branching points ( 7 ′, 7 ″; 8 ′, 8 ″; 9 ′, 9 ″) into at least two spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″),
characterized in that the circuit element furthermore comprises a capacitive circuit element and that the capacitive circuit element is formed by at least one blind conductor track ( 25 , 26 ) which is respectively electrically connected with the terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 ).
2. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that the at least one spiral winding ( 4 , 5 , 6 ) runs through between at least two contact points ( 11 , 12 ) of the electronic component ( 3 ).
3. The contactless data transmission device ( 50 ) according to claim 2 , characterized in that the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of the antenna conductor track ( 2 ) are formed to run with a constant width (b).
4. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of the antenna conductor track ( 2 ) are formed to run with a constant width (b).
5. The contactless data transmission device ( 50 ) according to claim 4 , characterized in that the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of the antenna conductor track ( 2 ) and the areas of the spiral windings ( 4 , 5 , 6 ) running in the mounting region ( 10 ) are equally wide.
6. The contactless data transmission device ( 50 ) according to claim 5 , characterized in that the electronic component ( 3 ) is formed by an unhoused semiconductor chip.
7. The contactless data transmission device ( 50 ) according to claim 6 , characterized in that the semiconductor chip is mounted on the antenna conductor track ( 2 ) according to the flip-chip technique.
8. The contactless data transmission device ( 50 ) according to claim 7 , characterized in that at least two of the at least two spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of at least one spiral winding ( 4 , 5 , 6 ) are connected together between the branching points ( 7 ′, 7 ″; 8 ′, 8 ″; 9 ′, 9 ″) additionally by respectively at least one electrical connecting element ( 35 ′, 35 ″, 35 ′″, 35 ″″; 36 ′, 36 ″, 36 ′″, 36 ″).
9. The contactless data transmission device ( 50 ) according to claim 8 , characterized in that the antenna conductor track ( 2 ) is made from a conductive paste or a conductive varnish.
10. The contactless data transmission device ( 50 ) according to claim 9 , characterized in that intermediate spaces between the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) are filled with a dielectric substance having a dielectric constant which differs from that of the carrier ( 1 ).
11. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of the antenna conductor track ( 2 ) and the areas of the spiral windings ( 4 , 5 , 6 ) running in the mounting region ( 10 ) are equally wide.
12. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that the electronic component ( 3 ) is formed by an unhoused semiconductor chip.
13. The contactless data transmission device ( 50 ) according to claim 12 , characterized in that the semiconductor chip is mounted on the antenna conductor track ( 2 ) according to the flip-chip technique.
14. The contactless data transmission device ( 50 ) according to claim 12 , characterized in that at least two of the at least two spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of at least one spiral winding ( 4 , 5 , 6 ) are connected together between the branching points ( 7 ′, 7 ″; 8 ′, 8 ″; 9 ′, 9 ″) additionally by respectively at least one electrical connecting element ( 35 ′, 35 ″, 35 ′, 35 ″″; 36 ′, 36 ″, 36 ′″, 36 ″″).
15. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that at least two of the at least two spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) of at least one spiral winding ( 4 , 5 , 6 ) are connected together between the branching points ( 7 ′, 7 ″; 8 ′, 8 ″; 9 ′, 9 ″) additionally by respectively at least one electrical connecting element ( 35 ′, 35 ″, 35 ′″, 35 ″″; 36 ′, 36 ″, 36 ′″, 36 ″″).
16. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that the antenna conductor track ( 2 ) is made from a conductive paste or a conductive varnish.
17. The contactless data transmission device ( 50 ) according to claim 16 , characterized in that intermediate spaces between the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) are filled with a dielectric substance having a dielectric constant which differs from that of the carrier ( 1 ).
18. The contactless data transmission device ( 50 ) according to claim 1 , characterized in that intermediate spaces between the spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″) are filled with a dielectric substance having a dielectric constant which differs from that of the carrier ( 1 ).
19. A valuable and/or security document comprising at least two document layers connected together through lamination, wherein one of the layers is formed by a contactless data transmission device ( 50 ) which comprises:
an electrically insulating carrier ( 1 ),
a circuit element arranged on the carrier ( 1 ), wherein the circuit element comprises a continuous antenna conductor track ( 2 ) in the form of at least one spiral winding ( 4 , 5 , 6 ) and respectively one terminal contact ( 15 , 16 ) at the ends thereof, and
an electronic component ( 3 ) electrically connected with the circuit element with at least two contact points ( 11 , 12 ), wherein the electronic component ( 3 ) is placed in a mounting region ( 10 ) above the at least one spiral winding ( 4 , 5 , 6 ) and wherein the at least two contact points ( 11 , 12 ) of the electronic component ( 3 ) are electrically connected with a respective terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 ),
wherein at least one spiral winding ( 4 , 5 , 6 ) is branched outside the mounting region ( 10 ) between two respective branching points ( 7 ′, 7 ″; 8 ′, 8 ″; 9 ′, 9 ″) into at least two spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″),
characterized in that the circuit element furthermore comprises a capacitive circuit element and that the capacitive circuit element is formed by at least one blind conductor track ( 25 , 26 ) which is respectively electrically connected with the terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 ).
20. A method for the manufacture of the contactless data transmission device ( 50 ) which comprises:
an electrically insulating carrier ( 1 ),
a circuit element arranged on the carrier ( 1 ), wherein the circuit element comprises a continuous antenna conductor track ( 2 ) in the form of at least one spiral winding ( 4 , 5 , 6 ) and respectively one terminal contact ( 15 , 16 ) at the ends thereof, and
an electronic component ( 3 ) electrically connected with the circuit element with at least two contact points ( 11 , 12 ), wherein the electronic component ( 3 ) is placed in a mounting region ( 10 ) above the at least one spiral winding ( 4 , 5 , 6 ) and wherein the at least two contact points ( 11 , 12 ) of the electronic component ( 3 ) are electrically connected with a respective terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 ),
wherein at least one spiral winding ( 4 , 5 , 6 ) is branched outside the mounting region ( 10 ) between two respective branching points ( 7 ′, 7 ″; 8 ′, 8 ″; 9 ′, 9 ″) into at least two spiral winding branches ( 4 ′, 4 ″; 5 ′, 5 ″; 6 ′, 6 ″),
characterized in that the circuit element furthermore comprises a capacitive circuit element and that the capacitive circuit element is formed by at least one blind conductor track ( 25 , 26 ) which is respectively electrically connected with the terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 );
said method comprising the following method steps:
i) providing a carrier ( 1 ),
ii) printing a spiral-shaped circuit element onto the carrier ( 1 ), wherein the circuit element comprises an antenna conductor track ( 2 ) including terminal contacts ( 15 , 16 ) of the antenna conductor track ( 2 ) and a capacitive circuit element, wherein the capacitive circuit element is formed by at least one blind conductor track ( 25 , 26 ) which is respectively electrically connected with a terminal contact ( 15 , 16 ) of the antenna conductor track ( 2 ),
iii) placing an electronic component ( 3 ) above the antenna conductor track ( 2 ) so that contact points ( 11 , 12 ) of the electronic component ( 3 ) lie opposite the terminal contacts ( 15 , 16 ), and contacting the electronic component ( 3 ) with the antenna conductor track ( 2 ).