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Soft 3D retinal implants with diamond electrode a way for focal stimulation

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Abstract

In neuroprostheses, the focal stimulation of the neuronal tissues is today a real challenge. These questions are particularly important in retinal prostheses to improve the quality of the images mapped onto an electrode array. It has been demonstrated that to achieve a normal vision the future generation of retinal implant must have 600 pixels with a pitch between electrodes around 50 μm. The long term in-vivo stability of electrodes in contact with the tissues remains a general and important challenge. After several days of implantation several histological studies show an inflammatory of the tissue at the interface between the electrode and tissues. Here we proposed a new approach based on retinal implants fabricated from 3D shaped diamond electrodes exhibiting both an improvement of the spatial resolution of the stimulation and a long term bio-inertness.
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Dates and versions

cea-01887750 , version 1 (04-10-2018)

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Lionel Rousseau, Emmanuel Scorsone, Abderrahmane Bendali, Milan Djilas, Hugues Girard, et al.. Soft 3D retinal implants with diamond electrode a way for focal stimulation. 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), Jun 2013, Barcelona, Spain. pp.1227-1230, ⟨10.1109/Transducers.2013.6626996⟩. ⟨cea-01887750⟩
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