Publications

MEMS conformal electrode array for retinal implant

Okandan, Murat O.; Wessendorf, Kurt O.; Christenson, Todd R.; Lemp, T.; Shul, Randy J.; Baker, M.; James, Conrad D.; Myers, Ramona L.; Stein, David J.

Retinal prosthesis projects around the world have been pursuing a functional replacement system for patients with retinal degeneration. In this paper, the concept for a micromachined conformal electrode array is outlined. Individual electrodes are designed to float on micromachined springs on a substrate that will enable the adjustment of spring constants-and therefore contact force-by adjusting the dimensions of the springs at each electrode. This also allows the accommodation of the varying curvature/topography of the retina. We believe that this approach provides several advantages by improving the electrode/tissue interface as well as generating some new options for in-situ measurements and overall system design.