Device Comprising a Substrate Including an Electronic Contact, and Transponder

• US 20080308310A1
• Filed: 11/23/2006
• Published: 12/18/2008
• Est. Priority Date: 11/28/2005
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Zenz, Christian, Rogy, Reinhard
• Granted Patent: US 8,437,141 B2
• Time in Patent Office: Days
• US Class Current: 174/260
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07752 using an interposer
• CPC Class Codes: H05K 1/111 Pads for surface mounting, e.g. lay-out
• CPC Class Codes: H05K 2201/10674 Flip chip
• CPC Class Codes: H05K 2201/2081 Compound repelling a metal, e.g. solder
• CPC Class Codes: H05K 3/3452 Solder masks
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

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 (T1, T2, T3) which comprises the substrate (1, 91), an electric device (50, 80) and an antenna (7, 93).

Claims

1. A device comprising:

a first electric contact having a first area with a first wettability; and

a substrate, which comprises a second areas having a second wettability and a third area having a third wettability and being adjacent to said second area;

said first electric contact being attached on said substrate so that said first area of said first electric contact is adjacent to said second area, and said second area is located between said first area and said third area, said first and said second wettability being higher than said third wettability.

2. The device of claim 1, comprising a conductive glue or conductive solder with which said first area and said second area are wetted.

3. The device of claim 1, wherein said third area is obtained by treating said substrate utilizing a sputtering process, a vapor-deposition process, by printing a layer having said third wettability on said third area, by applying a layer of silicon, by means of a surface treatment, or by implanting a thin thread or wire.

4. The device of claim 1, comprising a second electric contact having a fourth area with a fourth wettability;

said substrate comprising a fifth area having a fifth wettability and being adjacent to said third area, and said second electric contact being attached on said substrate so that said fourth area of said second electric contact is adjacent to said fifth area, and said fifth area is located between said fourth area and said third area, said fourth and said fifth wettability being higher than said third wettability.

5. A transponder comprising:

said substrate of claim 1;

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 third area of said substrate with its bottom surface and comprising device contacts being electrically connected to said first electric contact.

6. The transponder of claim 5, wherein said bottom surface of said electric device partly overlaps said second area without reaching said first area of said first electric contact.

7. The transponder of claim 5, comprising a conductive glue or a conductive solder, which is applied on said first area and said second areas and forms said electric contact between said first electric contact and said device contacts of said electric device.

8. The transponder of claim 5, wherein one of said side surfaces comprises said device contacts.

9. The transponder of claim 5, wherein said bottom surface is larger than said top surface.

10. The transponder of claim 5, wherein said antenna is attached on said substrate, and said first electric contact end represents said first electric contact.

11. The transponder of claim 10, comprising a second electric contact having a fourth area with a fourth wettability;

said antenna having a second contact end representing said second electric contact, said substrate comprising a fifth area having a fifth wettability and being adjacent to said third area, and said second electric contact being attached on said substrate so that said fourth area of said second electric contact is adjacent to said fifth area, and said fifth areas is located between said fourth area and said third area, said fourth and said fifth wettability being higher than said third wettability.

12. The transponder of claim 5, 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.

13. The transponder of claim 12, comprising a second electric contact having a fourth 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 area having a fifth wettability and being adjacent to said third area, and said second electric contact being attached on said first substrate so that said fourth area of said second electric contact is adjacent to said fifth area, and said fifth area is located between said fourth area and said third area, said fourth and said fifth wettability being higher than said third wettability.