Protuberant Electrode Structures for New Retinal Implants

Proceedings

Losada, Pedro González¹ 

关键词: microfabrication;    retinal prostheses;    implantable device;    3D electrode;    retinal stimulation;   

DOI  :  10.3390/proceedings1040315

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Focal stimulation of neural tissue is a challenge in retinal prosthetic devices in which the aim is to improve the spatial resolution of the stimulation and therefore increase the electrode density of the prosthetic devices. Our work intends to create a new implant able to enhance the focalisation of the stimulation signal through protuberant electrodes. These electrodes are micro fabricated on a soft polyimide substrate using classical metal electrodeposition techniques. Before proceeding with fabrication a FEM model of the electrode’s current density was done to select the best-performing structures and geometries in terms of local stimulation. Based on these models, several prototypes were fabricated and implanted in vivo into a rat’s eye to verify the adaptation to the retina tissue.

【 授权许可】

CC BY