Device comprising a substrate including an electronic contact, and transponder
The invention relates to a device comprising a first electric contact ( 8, 98 ) and a substrate ( 1, 91 ). The first electric contact ( 8, 98 ) comprises a first area ( 10, 110 ) with a first wettability, and the substrate ( 1, 91 ) comprises a second area ( 3 ) with a second wettability and a third area ( 2 ) with a third wettability and being adjacent to the second area ( 2 ). The first electric contact ( 8, 98 ) is attached on the substrate ( 1, 91 ) so that the first area ( 10, 110 ) of the first electric contact ( 8, 98 ) is adjacent to the second area ( 3 ), and the second area ( 3 ) is located between the first area ( 10, 110 ) and the third area ( 2 ). The first and the second wettability are higher than the third wettability. The invention also relates to a transponder (T 1 , T 2 , T 3 ) which comprises the substrate ( 1, 91 ), an electric device ( 50, 80 ) and an antenna ( 7, 93 ).
1. A transponder comprising: a first electric contact having a first surface area with a first wettability; a substrate, which comprises a second surface area having a second wettability and a surface structure formed on a third surface area of the substrate and having a third wettability and being adjacent to said second surface area; and
said first electric contact being attached on said substrate so that said first surface area of said first electric contact is adjacent to said second surface area, and said second surface area is located between said first surface area and said third surface area, said first and said second wettability being higher than said third wettability;
wherein the wettability of the first, second, and third surface areas represents the degree to which the first, second, and third surface areas attract or repel a conductive glue or a conductive solder;
an antenna having a first contact end being electrically connected to said first electric contact; and
an electric device which has a top surface, a bottom surface and a plurality of side surfaces; said electric device being arranged on said surface structure formed on said third surface area of said substrate with its bottom surface and comprising device contacts being electrically connected to said first electric contact; wherein said bottom surface of said electric device partly overlaps said second surface area without reaching said first surface area of said first electric contact.
2. The transponder of claim 1 , wherein the surface structure formed on said third surface area is formed by treating said substrate at said third surface area utilizing a sputtering process, a vapor-deposition process, by printing a layer having said third wettability on said third surface area, by applying a layer of silicon, by means of a surface treatment, or by implanting a thin thread or wire.
3. The transponder of claim 1 , comprising a second electric contact having a fourth surface area with a fourth wettability; said substrate comprising a fifth surface area having a fifth wettability and being adjacent to said third surface area, and said second electric contact being attached on said substrate so that said fourth surface area of said second electric contact is adjacent to said fifth surface area, and said fifth surface area is located between said fourth surface area and said third surface area, said fourth and said fifth wettability being higher than said third wettability.
4. The transponder of claim 1 , wherein said bottom surface of said electric device partly overlaps said second surface area without reaching said first surface area of said first electric contact.
5. The transponder of claim 1 , wherein a conductive glue or a conductive solder is applied on said first surface area and said second surface area and forms said electric contact between said first electric contact and said device contacts of said electric device.
6. The transponder of claim 1 , wherein one of said side surfaces comprises said device contacts.
7. The transponder of claim 1 , wherein said bottom surface is larger than said top surface.
8. The transponder of claim 1 , wherein said antenna is attached on said substrate, and said first electric contact end represents said first electric contact.
9. The transponder of claim 1 , wherein said substrate is a first substrate, said transponder comprises a second substrate on which said antenna is attached, and said first substrate is mounted on said second substrate.
10. The transponder of claim 1 , wherein the substrate is made of a material having the second wettability, wherein only the third surface area of the substrate is treated in order for the third wettability to be lower than the second wettability.
11. The transponder of claim 1 , further comprising a conductive glue or conductive solder with which said first surface area and said second surface area are wetted.
12. The transponder of claim 1 , wherein the second surface area is defined by trenches etched into the surface of the substrate.
13. The transponder of claim 8 , comprising a second electric contact having a fourth surface area with a fourth wettability; said antenna having a second contact end representing said second electric contact, said substrate comprising a fifth surface area having a fifth wettability and being adjacent to said third surface area, and said second electric contact being attached on said substrate so that said fourth surface area of said second electric contact is adjacent to said fifth surface area, and said fifth surface area is located between said fourth surface area and said third surface area, said fourth and said fifth wettability being higher than said third wettability.
14. The transponder of claim 9 , comprising a second electric contact having a fourth surface area with a fourth wettability and being attached on said first substrate; said antenna having a second contact end being electrically connected to said second electric contact, said first substrate comprising a fifth surface area having a fifth wettability and being adjacent to said third surface area, and said second electric contact being attached on said first substrate so that said fourth surface area of said second electric contact is adjacent to said fifth surface area, and said fifth surface area is located between said fourth surface area and said third surface area, said fourth and said fifth wettability being higher than said third wettability.
15. A transponder comprising:
a first electric contact having a first surface area with a first wettability;
a substrate, which comprises a second surface area having a second wettability and a surface structure formed on a third surface area of the substrate and having a third wettability and being adjacent to said second surface area;
said first electric contact being attached on said substrate so that said first surface area of said first electric contact is adjacent to said second surface area, and said second surface area is located between said first surface area and said third surface area, said first and said second wettability being higher than said third wettability;
an antenna having a first contact end being electrically connected to said first electric contact; and
an electric device which has a top surface, a bottom surface and a plurality of side surfaces; said electric device being arranged on said surface structure formed on said third surface area of said substrate with its bottom surface and comprising device contacts being electrically connected to said first electric contact;
wherein a conductive glue or a conductive solder is applied on said first surface area and said second surface area and forms said electric contact between said first electric contact and said device contacts of said electric device; and
wherein the wettability of the first, second, and third surface areas represents the degree to which the first, second, and third surface areas attract or repel the conductive glue or the conductive solder.
16. The transponder of claim 15 , wherein said antenna is attached on said substrate, and said first electric contact end represents said first electric contact;
and further comprising a second electric contact having a fourth surface area with a fourth wettability;
said antenna having a second contact end representing said second electric contact, said substrate comprising a fifth surface area having a fifth wettability and being adjacent to said third surface area, and said second electric contact being attached on said substrate so that said fourth surface area of said second electric contact is adjacent to said fifth surface area, and said fifth surface area is located between said fourth surface area and said third surface area, said fourth and said fifth wettability being higher than said third wettability;
wherein a conductive glue or a conductive solder is applied on said fourth surface area and said fifth surface area and forms said electric contact between said second electric contact and said device contacts of said electric device; and
wherein the wettability of the third, fourth, and fifth surface areas represents the degree to which the third, fourth, and fifth surface areas attract or repel the conductive glue or the conductive solder.
17. The transponder of claim 15 , wherein said substrate is a first substrate, said transponder comprises a second substrate on which said antenna is attached, and said first substrate is mounted on said second substrate; and further comprising a second electric contact having a fourth surface area with a fourth wettability and being attached on said first substrate;
said antenna having a second contact end being electrically connected to said second electric contact, said first substrate comprising a fifth surface area having a fifth wettability and being adjacent to said third surface area, and said second electric contact being attached on said first substrate so that said fourth surface area of said second electric contact is adjacent to said fifth surface area, and said fifth surface area is located between said fourth surface area and said third surface area, said fourth and said fifth wettability being higher than said third wettability;
wherein a conductive glue or a conductive solder is applied on said fourth surface area and said fifth surface area and forms said electric contact between said second electric contact and said device contacts of said electric device; and
wherein the wettability of the third, fourth, and fifth surface areas represents the degree to which the third, fourth, and fifth surface areas attract or repel the conductive glue or the conductive solder.