Artificial cochlea electrode and manufacturing method thereof

Abstract

The invention discloses an artificial cochlea electrode and a manufacturing method thereof. The artificial cochlea electrode comprises a plurality of single electrodes and coating layers of the singleelectrodes, wherein each single electrode comprises an electrode wire, a conducting part, an insulating coating and a graphene coating; each electrode wire is made of conductive metal; one end of each electrode wire is provided with the corresponding conducting part; each conducting part is made of conductive metal, and is electrically conducted with the corresponding electrode wire; each insulating coating is made of an insulating material and coats the corresponding electrode wire; each graphene coating is made of graphene and is attached to the outer surface of the corresponding conductingpart; and each coating layer is made of an insulating material with the biosafety, and coats the corresponding single electrode, but exposes the corresponding graphene coating. According to the artificial cochlea electrode and the manufacturing method thereof, each graphene coating made of the graphene is used as a contact, so that the higher charge storage capacity can be obtained, the impedanceof contact with cochlea tissue is reduced, the fibrosis of the cochlea tissue on the surface of the contact is prevented, the working stability is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to an artificial cochlear electrode and a manufacturing method thereof. Background technique [0002] The cochlear implant includes two parts: an external device and an implanted device in the body. The signal transmission between the external device and the implanted device in the body is completed by electromagnetic induction. , and its transmitter, the implanted device in the body includes a receiver and its electrodes, the sound is received by the microphone and converted into an electrical signal, and then transmitted to the speech processor to amplify and filter the signal, and then transmitted from the transmitter to the receiver, the generated electrical signal Pulses are sent to the contacts of the electrodes, thereby stimulating the ganglion cells in the cochlea, which excites the auditory nerve and transmits sound information to the brain to produce hearing. [0003] In the whole cochlear implant system, the implanted ...

AI Technical Summary

Problems solved by technology

This type of material has good biological safety and chemical stability, and the conventional upper contacts are smooth surfaces to avoid damage to cochlear tissue during implantation, but the charge storage capacity of platinum or platinum-iridium alloy contacts on smooth surfaces Weak, which limits the effectiveness of cochlear electrical stimulation

In order to improve the charge loading capacity of electrode contacts, some micro-modify the contact surface by laser, and electroplate precious metal materials on the surface of platinum contacts to increase the load area to increase the load capacity, but the results are not ideal. Electroplating The bonding force between the layer and the substrate is not enough, it is easy to fall off, and it cannot be used in industrial applications

In addition, long-term implantation of contacts made of platinum materials may cause fibrosis of the cochlear tissue on the electrode surface in some patients, which will affect the effect of electrical pulse stimulation and postoperative rehabilitation.

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