Method of manufacturing electrically conductive stretchable interconnect using twisted nature of yarn fibers

Patent metadata

Field	Value
Publication number	US-9847155-B2
Application number	US-201615006497-A
Country	US
Kind code	B2
Filing date	Jan 26, 2016
Priority date	Jan 27, 2015
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Disclosed herein are an electrically conductive stretchable interconnect using a twisted nature of yarn fibers and a method of manufacturing the same. According to an exemplary embodiment of the present invention, the electrically conductive stretchable interconnect includes: an elastic body in which a stretchable tunnel is formed in a length direction; and a conductive twisted yarn including a stretchable structure positioned inside the stretchable tunnel and extended by a force applied in the length direction and an extending part extending from the stretchable structure to an outside of the elastic body.

First claim

What is claimed is:

1. A method of manufacturing an electrically conductive stretchable interconnect, comprising:
injecting an elastic material into a mold to which conductive twisted yarns are fixed in a length direction;
hardening the elastic material to form an elastic body; and
forming a stretchable structure in at least a portion of the conductive twisted yarn by applying a tensile force to the elastic body in the length direction,
wherein a length of the conductive twisted yarn is longer than a maximum tensile length of the elastic body, and wherein the maximum tensile length is a tensioned length of the elastic body until the stretchable structure becomes a straight shape.

2. The method of claim 1 , wherein the forming of the stretchable structure in the at least a portion of the conductive twisted yarn by applying the tensile force to the elastic body in the length direction includes:
clamping both ends of the elastic body;
forming a stretchable tunnel, in which the stretchable structure is positioned, inside the elastic body by tensioning at least one of the clamped both ends of the elastic body in the length direction; and
restoring the elastic body to an initial state by removing the tensile force.

3. The method of claim 2 , wherein in the forming of the stretchable tunnel, in which the stretchable structure is positioned, inside the elastic body by tensioning the at least one of the clamped both ends of the elastic body in the length direction, the conductive twisted yarn is separated from the elastic body.

4. The method of claim 2 , wherein in the restoring of the elastic body to the initial state by removing the tensile force, the at least a portion of the conductive twisted yarn positioned inside the stretchable tunnel becomes the stretchable structure extended by a force applied in the length direction.

5. The method of claim 4 , wherein the stretchable structure has a helically twisted structure.

6. The method of claim 1 , further comprising:
prior to the injecting of the elastic material into the mold to which the conductive twisted yarn is fixed in the length direction, degassing bubbles from the elastic material which is in a liquid state.

7. The method of claim 1 , wherein the conductive twisted yarn is a conductive coating yarn.

8. The method of claim 1 , wherein the conductive twisted yarn is formed by braiding at least two single yarns.

9. The method of claim 1 , wherein the injecting of the elastic material into the mold to which the conductive twisted yarn is fixed in the length direction includes disposing each of the plurality of conductive twisted yarns to be spaced apart from each other in the length direction.

10. The method of claim 1 , wherein the elastic material is silicon or rubber.

11. The method of claim 1 , further comprising:
after the forming of the stretchable structure in the at least a portion of the conductive twisted yarn by applying the tensile force to the elastic body in the length direction, coupling a crimping contact with at least one of both ends of the conductive twisted yarn.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Kim Ji-Eun
• Son Yong-Ki
• Sohn Jong-Moo

Classifications

• D02G3/36

  Cored or coated yarns or threads ({D02G3/34, D02G3/40 take precedence}; elastic yarns or threads D02G3/32) · CPC title

• D10B2401/16

  antistatic; conductive · CPC title

• D02G3/441 Primary

  Yarns or threads with antistatic, conductive or radiation-shielding properties (electroconductive, anti-static or radiation-shielding filaments D01F1/09, D01F1/106; anti-static fabrics D03D15/533; conducting, insulating or anti-static layers for floor coverings D06N7/0042) · CPC title

• B29C45/14

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B29C45/0055

  Shaping · CPC title