Abstract
We have developed an electrical stimulator and diagnostic research microarray with wireless power and communications to facilitate spatial stimulation of retinal tissue. A third generation 32× 32 prototype of this retinal neural implant array has been developed. Integrated into the microarray is a functionally graded Ti/IrO2 microbump electrode system for interface with neural tissue with decreased impedance for stimulation. The microarray is designed for basic research to determine retinal tissue stimulation thresholds and spatial effects. The array is connected to a telemetry chip, which uses magnetic induction for wireless power with a digital overlay for communication. In our design, changes in the induced current in the telemetry coil are used to send information to the reading coil. Since the reading and telemetry coil are magnetically coupled, the current change can be sensed for bidirectional communication. Combined, this chip set provides a 1024 array that can stimulate neural tissue spatially, can sense neural signals spatially, and has wireless power and communication in a package of less than 2 mm size.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
W. Liu, K. Vichienchom, M. Clements, S. C. DeMarco, C. Huges, E. McGucken, M. S. Humayun, E. DeJuan, J. D. Weiland, and R. Greenberg, “A Neuro-stimulus Chip with Telemetry Unit for Retinal Prosthetic Device,” IEEE Journal of Solid-State Circuits, vol. 35, no. 10, Oct 2000, pp. 1487–1497.
E. Zrenner, K. D. Miliczek, V. P. Gabel, H. G. Graf, E. Guenther, H. Haemmerle, B. Hoefflinger, K. Kohler, W. Nisch, M. Schubert, A. Stett, and S. Weiss, “The development of sub-retinal microphotodiodes for replacement of degenerated photoreceptors.” Opthalmic Research, 1997, 29, 269–280.
G. Peyman, A. Y. Chow, C. Liang, V. Y. Chow, J. I. Perlman, and N. S. Peachey, “Subretinal semiconductor microphotodiode array,” Ophthalmic Surg. Lasers, vol. 29, pp. 234–241, 1998.
H.K. Trieu, L. Ewe, W. Mokwa, M. Schwarz, and B. J. Hostica, “Flexible Silicon Structures For A Retina Implant”, IEEE Transaction, 1998, vol. 10, pp. 515–519 VI.
Y. Yao, M. N. Gulari, J. F. Hetke, and K. D. Wise, “A self-testing multiplexed CMOS stimulating probe for a 1024-site neural prosthesis”, The 12th International Conference on Solid State Sensors, Actuators and Microsystems, Boston, June 8–12, 2003, Transducer ’03, pp. 1213–1216.
Shuenn-Yuh Lee, Shyh-Chyang Lee, and Jia-Jin Jason Chen, “VLSI Implementation of Implantable Wireless Power and Data Transmission Micro-Stimulator for Neuromuscular Stimulation”, IEICE Transactions on Electronics, vol. E87-C, no.6, June 2004, pp. 1062–1067.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2007 Springer Science+Business Media, LLC
About this chapter
Cite this chapter
Auner, G., You, R., Siy, P., McAllister, J., Talukder, M., Abrams, G. (2007). Development of a Wireless High-Frequency Microarray Implant for Retinal Stimulation. In: Humayun, M.S., Weiland, J.D., Chader, G., Greenbaum, E. (eds) Artificial Sight. Biological and Medical Physics, Biomedical Engineering. Springer, New York, NY. https://doi.org/10.1007/978-0-387-49331-2_9
Download citation
DOI: https://doi.org/10.1007/978-0-387-49331-2_9
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-49329-9
Online ISBN: 978-0-387-49331-2
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)