Methods for electrically connecting textile integrated conductive yarns

Patent metadata

Field	Value
Publication number	US-10458050-B2
Application number	US-201514956966-A
Country	US
Kind code	B2
Filing date	Dec 2, 2015
Priority date	Jun 26, 2013
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A textile fabric containing a first electrically conductive thread and a second electrically conductive thread is disclosed. In one aspect, the first electrically conductive thread and the second electrically conductive thread cross at a first crossover point, wherein the textile fabric further contains an electrical connector establishing an electrical connection between the first electrically conductive thread and the second electrically conductive thread. The electrical connector contains a first contact pad in electrical contact with the first electrically conductive thread, a second contact pad in electrical contact with the second electrically conductive thread, and a first stretchable electrical interconnection connecting the first contact pad with the second contact pad. The first contact pad and the second contact pad are provided at a location different from the location of the first crossover point. Methods for electrically interconnecting crossing electrically conductive threads of textile fabrics are also disclosed.

First claim

What is claimed is:

1. A textile fabric comprising a plurality of electrically conductive yarn threads woven in a weft direction and comprising a first electrically conductive thread, the fabric further comprising a plurality of electrically conductive yarn threads woven in a warp direction and comprising a second electrically conductive thread, the first electrically conductive thread and the second electrically conductive thread crossing at a first crossover point, the fabric further comprising an electrical connector establishing an electrical connection between the first electrically conductive thread and the second electrically conductive thread, wherein the electrical connector comprises a first contact pad in direct electrical contact with the first electrically conductive thread and not the second electrically conductive thread, a second contact pad in direct electrical contact with the second electrically conductive thread and not the first electrically conductive thread, and a first stretchable electrical interconnection connecting the first contact pad with the second contact pad.

2. The textile fabric according to claim 1 , wherein at least one of the first contact pad and the second contact pad are provided at a location different from the location of the first crossover point.

3. The textile fabric according to claim 1 , wherein adjacent crossover points in the textile fabric are separated by a distance (D), and wherein at least one of the first and second contact pads is offset from the first crossover point by a distance (d) which is at most twice the distance (D) between adjacent crossover points in the textile fabric.

4. The textile fabric according to claim 3 , wherein the distance (d) is at most one times the distance (D) between adjacent crossover points in the textile fabric.

5. The textile fabric according to claim 1 , wherein adjacent crossover points in the textile fabric are separated by a distance (D), and wherein the dimensions of the electrical connector are such that it fits in a square of which the width is twice the distance (D) between adjacent crossover points.

6. The textile fabric according to claim 5 , wherein the dimensions of the electrical connector are determined so as to fit in a square of which the width is one times the distance (D) between adjacent crossover points.

7. The textile fabric according to claim 5 , wherein at least one of the third contact pad and the fourth contact pad are provided at a location different from the location of the second crossover point.

8. The textile fabric according to claim 1 , further comprising a third electrically conductive thread and a fourth electrically conductive thread, the third electrically conductive thread and the fourth electrically conductive thread crossing at a second crossover point, wherein the electrical connector in addition establishes an electrical connection between the third electrically conductive thread and the fourth electrically conductive thread, wherein the electrical connector comprises a third contact pad in electrical contact with the third electrically conductive thread, a fourth contact pad in electrical contact with the fourth electrically conductive thread, and a second stretchable interconnection connecting the third contact pad with the fourth contact pad, the second stretchable interconnection being electrically insulated from the first stretchable interconnection.

9. The textile fabric according to claim 1 , further comprising a third electrically conductive thread and a fourth electrically conductive thread, the third electrically conductive thread and the fourth electrically conductive thread crossing at a second crossover point, wherein the electrical connector comprises a third contact pad in electrical contact with the third electrically conductive thread, a fourth contact pad in electrical contact with the fourth electrically conductive thread, and wherein the electrical connector establishes a stretchable electrical connection between the first to fourth contact pads.

10. The textile fabric according to claim 1 , wherein a plurality of electrical connectors is provided at or near the first crossover point to provide a plurality of stretchable interconnections between the first and second electrically conductive threads.

11. The textile fabric according to claim 1 , wherein each electrical connector comprises a patterned metal layer supported by a patterned flexible layer.

12. The textile fabric according to claim 1 , wherein at least one of the contact pads is electrically connected to the corresponding conductive thread by an electrically conductive adhesive.

13. The textile fabric according to claim 1 , wherein the first stretchable electrical interconnection has one of the following shapes: a curved shape, a shape comprising a combination of curved elements, and a meander shape.

14. A method for electrically interconnecting a first electrically conductive thread of a plurality of electrically conductive yarn threads woven in a weft direction with a second electrically conductive thread of a plurality of electrically conductive yarn threads woven in a warp direction of a textile fabric, the first electrically conductive thread and the second electrically conductive thread crossing at a first crossover point, wherein the method comprises:
providing an electrical connector comprising a first contact pad, a second contact pad, and a first stretchable electrical interconnection connecting the first contact pad with the second contact pad; and
directly electrically connecting the first contact pad with the first electrically conductive thread and not the second electrically conductive thread at a first predetermined location and directly electrically connecting the second contact pad with the second electrically conductive thread and not the first electrically conductive thread at a second predetermined location.

15. The method according to claim 14 , wherein at least one of the first predetermined location and the second predetermined location are different from the location of the first crossover point.

16. The method according to claim 14 , wherein electrically connecting the first contact pad with the first electrically conductive thread and electrically connecting the second contact pad with the second electrically conductive thread comprises:
attaching the electrical connector to the textile fabric by an electrically non-conductive adhesive material;
locally removing the non-conductive adhesive material and any other electrically insulating material that is present between the first contact pad and the first electrically conductive thread at the first predetermined location and between the second contact pad and the second electrically conductive thread at the second predetermined location; and
locally providing an electrically conductive material at the first predetermined location and at the second predetermined location.

Assignees

• Imec Vzw
• Univ Gent

Inventors

• Van Keymeulen Bjorn
• Bossuyt Frederick
• Vervust Thomas
• De Baets Johan

Classifications

• H10W70/688

  Flexible insulating substrates · CPC title

• D03D1/0088 Primary

  Fabrics having an electronic function · CPC title

• H05K1/038

  Textiles (used as reinforcing materials for organic insulating substrates H05K1/0366) · CPC title

• H05K1/0289

  having a matrix lay-out, i.e. having selectively interconnectable sets of X-conductors and Y-conductors in different planes · CPC title

• H05K3/103

  by bonding or embedding conductive wires or strips · CPC title