Long term Cochlear Implant electrode improvement for stimulation and sensing neuronal activity

Electrode array, an important component of Cochlear Implant (CI) design holds a key position in restoring the hearing process to the deaf patients. It represents a direct interface between the auditory nerve (biological tissue) and the electronic system of the CI. Electrode arrays are available in different design, material, shape and size depending upon the requirement and the application of the device. The traditional fabrication method of the device restricts the electrode usability and its performance. In this paper we investigate and explore capable materials for CI electrode array fabrication used for stimulating the auditory neurons. Here we discuss the CMOS compatible electrode material and the necessary biocompatible insulation required for long term implants. Fabrication issues and different material possibilities are discussed with respect to the properties associated with it.