Title :
Dynamic electrochemical simulation of micromachined electrodes for neural-stimulation systems
Author :
Hung, Andy ; Zhou, David ; Greenberg, Robert ; Judy, Jack W.
Author_Institution :
Dept. of Biomed. Eng., California Univ., Los Angeles, CA, USA
Abstract :
High-resolution retinal prosthetic systems require high-density stimulation electrodes to restore the vision of blind patients suffering from retinitis pigmentosa and macular degeneration. To increase the effective area of the electrode, a micromachining process is used to add high aspect ratio structures to the electrode surface. Modeling such structures with spice resistor and capacitor elements allow prediction of the current and voltage distribution during stimulation, thus quantifying the electrode performance and longevity.
Keywords :
biomedical electrodes; biomedical engineering; handicapped aids; micromachining; neuromuscular stimulation; blind patients; capacitor elements; current distribution; dynamic electrochemical simulation; electrode performance; electrode surface; high aspect ratio structures; high-density stimulation electrodes; high-resolution retinal prosthetic systems; macular degeneration; micromachined electrodes; micromachining process; neural-stimulation systems; retinitis; spice resistor; voltage distribution; Biomedical electrodes; Capacitance; Conductivity; Impedance; Lifting equipment; Microstructure; Neural prosthesis; Retina; Surface fitting; Voltage;
Conference_Titel :
Neural Engineering, 2003. Conference Proceedings. First International IEEE EMBS Conference on
Print_ISBN :
0-7803-7579-3
DOI :
10.1109/CNE.2003.1196792
