Stretchable conductor, method for manufacturing same, and paste for forming stretchable conductor

Patent metadata

Field	Value
Publication number	US-10176903-B2
Application number	US-201515115974-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 5, 2014
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A stretchable conductor of the present invention includes: a mixture which is configured of a stretchable portion made of an elastomer, and at least one type of conductive particles dispersed in the stretchable portion; and a conducting portion in which the conductive particles are aggregated in a higher concentration at one or a plurality of positions on an interface of the mixture than that at positions located in an inner portion of the mixture.

First claim

What is claimed is:

1. A stretchable conductor, comprising:
a stretchable portion; and
a conducting portion;

wherein:
the stretchable portion is made of an elastomer, a plurality of conductive particles being dispersed within the elastomer;
the conducting portion is made of an elastomer, a plurality of conductive particles being dispersed within the elastomer in a higher concentration than that of the stretchable portion;
the conducting portion is formed at one or a plurality of positions on an interface of the elastomer;
the plurality of conductive particles are arranged so as to overlap each other, and dispersed within the elastomer in the conducting portion; and
the conducting portion maintains the conductivity greater than 100 siemens when an extension of 50% to 200% of strain is applied.

2. The stretchable conductor according to claim 1 , wherein a content of the conductive particles is 400% or less with respect to the mass of the elastomer.

3. The stretchable conductor according to claim 1 , wherein the conductive particles are metal thin piece fine particles of which the particle diameter is 1 μm to 5 μm.

4. The stretchable conductor according to claim 1 , wherein the elastomer is crosslinked.

5. The stretchable conductor according to claim 1 , wherein the elastomer is a fluororubber.

Assignees

• Japan Science & Tech Agency

Inventors

• Sekitani Tsuyoshi
• Someya Takao
• Matsuhisa Naoji

Classifications

• H10P14/46

  using a liquid · CPC title

• H10W20/4473

  Conductive organic materials, e.g. conductive adhesives or conductive inks · CPC title

• H10W20/031

  of conductive parts of the interconnections · CPC title

• H01L27/283

  Electricity · mapped topic

• C09D115/02

  Rubber derivatives containing halogen · CPC title