An implantable electrode device and a method for manufacturing thereof

An implantable electrode device comprising:

• a carrier made of a polymer material, wherein the carrier is flexible and electrically isolating;
• at least one measurement electrode formed by an electrically conducting pad located on the carrier, wherein the electrically conducting pad has a contact surface;
• a barrier layer enclosing the carrier by covering all surfaces of the carrier, wherein the contact surface of the electrically conducting pad is exposed to an outside environment;
• at least one electrically conducting trace;
• and
• at least one electrically conducting terminal;
• wherein the electrically conducting trace electrically connects the measurement electrode to the electrically conducting terminal;
• wherein a surface of the implantable electrode device on a side on which the measurement electrode is located has a maximum valley depth or a maximum peak height between the contact surface of the measurement electrode and a meanline of a surface of the implantable electrode device, excluding measurement electrodes, being equal to or smaller than 100 micrometres.

A system comprising:

• a data processor;
• and
• an implantable electrode device, wherein the implantable electrode device comprises:
• a carrier made of a polymer material, wherein the carrier is flexible and electrically isolating;
• at least one measurement electrode formed by an electrically conducting pad located on the carrier, wherein the electrically conducting pad has a contact surface;
• a barrier layer enclosing the carrier by covering all surfaces of the carrier, wherein the contact surface of the electrically conducting pad is exposed to an outside environment;
• at least one electrically conducting trace;
• and
• at least one electrically conducting terminal;
• wherein the electrically conducting trace electrically connects the measurement electrode to the electrically conducting terminal;
• wherein a surface of the implantable electrode device on a side on which the measurement electrode is located has a maximum valley depth or a maximum peak height between the contact surface of the measurement electrode and a meanline of a surface of the implantable electrode device, excluding measurement electrodes, being equal to or smaller than 100 micrometres;
• wherein the data processor comprises a first interface equipment in communication with a second interface equipment of the implantable electrode device when in use.

A method for manufacturing an implantable electrode device comprising:

• providing a substrate;
• applying a liquid polymer material onto the substrate;
• confining the liquid polymer material to define a desired height;
• curing the liquid polymer material to form a solid, flexible and electrically isolating polymer material providing a carrier;
• depositing an electrically conducting material on the carrier;
• structuring of the electrically conducting material in order to define at least one measurement electrode formed by an electrically conducting pad having a contact surface, at least one electrically conducting trace, and at least one electrically conducting terminal, wherein the electrically conducting trace electrically connects the measurement electrode and the terminal;
• removing the substrate;
• and
• coating of a barrier layer onto the structure comprising the carrier and the electrically conducting material so that the barrier layer encloses the structure by covering all surfaces of the structure;
• wherein a surface of the implantable electrode device on a side on which the measurement electrode is located has a maximum valley depth or a maximum peak height between the contact surface of the measurement electrode and a meanline of the surface of the implantable electrode device excluding the at least one measurement electrode being equal to or smaller than 100 micrometres.