Testing of thin-film electrode arrays for cochlear implants of the future
AuthorParker, J. R.; Duan, Y. Y.; Patrick, J.; Harrison, H. B.; Reinhold, O.; Clark, Graeme M.
Source TitleBiomedical Research in the 3rd Millennium. Proceedings of the Inaugural Conference of the Victorian Chapter of the IEEE Engineering in Medicine and Biology Society
University of Melbourne Author/sClark, Graeme
Document TypeConference Item
CitationsParker, J. R., Duan, Y. Y., Patrick, J., Harrison, H. B., Reinhold, O., & Clark, G. M. (1999). Testing of thin-film electrode arrays for cochlear implants of the future. In Biomedical Research in the 3rd Millennium. Proceedings of the Inaugural Conference of the Victorian chapter of the IEEE Engineering in Medicine and Biology Society, Caulfield, Victoria.
Access StatusOpen Access
The Nucleus cochlear implant has been shown to give substantial communication benefit to the severe to profoundly deaf. Future cochlear implants will incorporate an advanced multi-channel electrode array, which will enable better sound-coding strategies to be implemented. This new electrode array will be fabricated using state-of-the-art micromachining technology. Any long-term implanted device such as a cochlear implant must undergo rigorous testing to ensure biological safety. In this paper four tests for the micromachined array are discussed. The tests are based on electrochemical methods, and include open circuit potential, galvanostatic biphasic pulse, 4-electrode shorting tests, and electrochemical impedance spectroscopy. This paper demonstrates that these test techniques are effective and informative in the development of thin-film electrode arrays. They can be used to verify the fabrication steps, electrode quality, and the suitability for the biological environment.
Keywordsotolaryngology; cochlear implants; multi-channel electrode array; testing
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- Graeme Clark Collection