Electrode and method for manufacturing electrode

Patent metadata

Field	Value
Publication number	US-10376174-B2
Application number	US-201515111647-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 6, 2014
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

In order to provide an electrode equipped with an insulating wall having excellent patterning properties as well as excellent biocompatibility, there is provided an electrode including, on a substrate, an electrode element; and an insulating wall formed around the electrode element, constituted of a polysiloxane compound (component A) having, per molecule, two or more functional groups selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group, and formed from a polymer obtained by reaction of the functional groups.

First claim

The invention claimed is:

1. An electrode configured for detecting electrical signals from biological tissue comprising, on a substrate,
an electrode element; and
an insulating wall formed around the electrode element, constituted of a polysiloxane compound (component A) having, per molecule, two or more functional groups selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group, and formed from a polymer obtained by reaction of the functional groups.

2. The electrode according to claim 1 ,
wherein the component A is a compound having a structure represented by the following general formula (A1);

wherein each of X 1 and X 2 independently represents a functional group selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group;
each of R 1 to R 6 independently represents a substituent group selected from hydrogen, an alkyl group of 1 to 20 carbon atoms, a phenyl group, and a fluoroalkyl group of 1 to 20 carbon atoms;
each of L 1 and L 2 independently represents a divalent group; and
“a” is a number of siloxane repeating units represented by an integer of 1 to 3,000.

3. The electrode according to claim 1 , wherein a number average molecular weight of the component A is at least 6,000.

4. The electrode according to claim 1 ,
wherein the polymer is a copolymer obtained by copolymerizing the component A and a polysiloxane compound (component M) having, per molecule, one functional group selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group.

5. The electrode according to claim 4 ,
wherein the component M is a compound having a structure represented by the following general formula (M1);

wherein X 3 represents a functional group selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group; each of R 7 to R 13 independently represents a substituent group selected from hydrogen, an alkyl group of 1 to 20 carbon atoms, a phenyl group, and a fluoroalkyl group of 1 to 20 carbon atoms; L 3 represents a divalent group; and “b” is a number of siloxane repeating units represented by an integer of 0 to 1,400.

6. The electrode according to claim 1 ,
wherein the polymer is a copolymer obtained by copolymerizing the component A and a compound (component B) having a fluoroalkyl group and one or more functional groups, per molecule, selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and a maleimide group.

7. The electrode according to claim 6 , wherein the component B is a (meth)acrylic acid fluoroalkyl ester.

8. The electrode according to claim 1 ,
wherein a plurality of the electrode elements are arranged on the substrate, and
the insulating wall is formed so as to insulate the plurality of electrode elements from each other.

9. The electrode according to claim 1 , wherein the insulating wall is formed by polymerizing the component (A) by electromagnetic wave irradiation.

10. The electrode according to claim 1 ,
wherein the component A is a compound having a structure represented by the following general formula (A1);

wherein both of X 1 and X 2 are a (meth)acryloyl group;
each of R 1 to R 6 independently represents a substituent group selected from hydrogen, an alkyl group of 1 to 20 carbon atoms, a phenyl group, and a fluoroalkyl group of 1 to 20 carbon atoms;
each of L 1 and L 2 independently represents a divalent group; and
“a” is a number of siloxane repeating units represented by an integer of 1 to 3,000.

11. A method for manufacturing an electrode configured for detecting electrical signals from biological tissue, comprising:
a step of placing an electrode element on a substrate;
a step of placing, around the electrode element, a photocurable material including a polysiloxane compound (component A) having, per molecule, two or more functional groups selected from the group consisting of a (meth)acryloyl group, a styrenic vinyl group, a vinyl ester group, a maleic acid ester group and maleimide group, and a photoradical polymerization initiator; and
a step of forming the insulating wall by irradiating an electromagnetic wave to the photocurable material to cure.

Assignees

• Someya Takao
• Sekitani Tsuyoshi
• KURIBARA Kazunori
• Toray Industries

Inventors

• Someya Takao
• Sekitani Tsuyoshi
• KURIBARA Kazunori
• Tamiya Ryuta
• Nakamura Masataka

Classifications

• A61B5/04001

  Human Necessities · mapped topic

• A61B5/0478 Primary

  Human Necessities · mapped topic

• A61B5/263 Primary

  characterised by the electrode materials · CPC title

• C08G77/20

  containing silicon bound to unsaturated aliphatic groups · CPC title

• A61B5/291 Primary

  for electroencephalography [EEG] · CPC title