# US 11,298,531 B2 · Elastic neural electrode and method for fabricating the same

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- Number: US 11,298,531 B2
- Document ID: US11298531B2
- Status: Granted
- Kind: B2
- Application number: 17/510,019
- Filed: 2021-10-25
- Published: 2022-02-10
- Granted: 2022-04-12
- Earliest claimed: 2016-07-18
- Assignees: Cortec Corporation
- Applicants: CorTec GmbH
- Inventors: Christian Henle; Martin Schuettler; Fabian Kohler; Miguel Ulloa; Juan Sebastian Ordonez; Matthias Mueller
- Web page: https://patentgrep.com/patent/US11298531B2

## CPC

- A61N 1/0551: {Spinal or peripheral nerve electrodes}
- A61N 1/375: Constructional arrangements, e.g. casings
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

An elastic neural electrode is provided, having at least one planar metal layer which comprises conductive material and which is placed on an elastomer layer (PDMS), wherein, for reinforcement of the electrode, a high-tensile-strength polymer layer, in particular parylene layer is applied directly onto the at least one metal layer, the high-tensile-strength polymer layer, in particular parylene layer being the outermost layer of the electrode.

## Claims

### Claim 1

Method for fabrication of an elastic neural electrode, comprising the following steps:
applying an elastomer layer onto a release carrier;
structuring the elastomer layer using a laser beam;
laminating at least one metal layer onto the elastomer layer;
structuring the at least one metal layer using a laser beam;
removing excess metal;
applying an elastomer layer onto the at least one metal layer, thus defining an edge to a welding area;
locally applying a masking tape at the welding area;
deposing a high-tensile-strength polymer layer directly onto the at least one metal layer, and onto the elastomer layer, and onto the masking tape;
structuring openings and cutting-free the masking tape using a laser beam;
removing the masking tape, thus exposing the welding area;
removing the electrode from the mechanical carrier;
welding wires to the electrode at the welding area;
sealing the welding area with an elastomer adhesive.

### Claim 2 (depends on 1)

Method according to claim 1, wherein the shaping of the at least one metal layer, removing of the excess metal, the partial removing the third elastomer, and/or the cutting out of the outer contour is achieved by means of laser processing.

### Claim 3 (depends on 1)

Method according to claim 1, wherein an additional step of printing information onto the high-tensile-strength polymer layer is carried out.

### Claim 4 (depends on 1)

Method according to claim 1, wherein an additional step of perforating the high-tensile-strength polymer layer is carried out.

### Claim 5 (depends on 1)

Method according to claim 1, wherein the polymer layer is a parylene layer.