DocumentCode :
779366
Title :
A Retinal Prosthesis Technology Based on CMOS Microelectronics and Microwire Glass Electrodes
Author :
Scribner, D. ; Johnson, Luke ; Skeath, P. ; Klein, Reinhard ; Ilg, D. ; Wasserman, L. ; Fernandez, Natalia ; Freeman, William ; Peele, J. ; Perkins, F.K. ; Friebele, E.J. ; Bassett, W.E. ; Howard, J.G. ; Krebs, W.
Author_Institution :
Opt. Sci. Div., Naval Res. Lab., Washington, DC
Volume :
1
Issue :
1
fYear :
2007
fDate :
3/1/2007 12:00:00 AM
Firstpage :
73
Lastpage :
84
Abstract :
A very large format neural stimulator device, to be used in future retinal prosthesis experiments, has been designed, fabricated, and tested. The device was designed to be positioned against a human retina for short periods in an operating room environment. Demonstrating a very large format, parallel interface between a 2-D microelectronic stimulator array and neural tissue would be an important step in proving the feasibility of high resolution retinal prosthesis for the blind. The architecture of the test device combines several novel components, including microwire glass, a microelectronic multiplexer, and a microcable connector. The array format is 80 times 40 array pixels with approximately 20 microwire electrodes per pixel. The custom assembly techniques involve indium bump bonding, ribbon bonding, and encapsulation. The design, fabrication, and testing of the device has resolved several important issues regarding the feasibility of high-resolution retinal prosthesis, namely, that the combination of conventional CMOS electronics and microwire glass provides a viable approach for a high resolution retinal prosthesis device. Temperature change from power dissipation within the device and maximum electrical output current levels suggest that the device is acceptable for acute human tests
Keywords :
CMOS integrated circuits; biological tissues; eye; microelectrodes; multiplexing equipment; neurophysiology; prosthetics; 2-D microelectronic stimulator array; CMOS microelectronics; blind; encapsulation; indium bump bonding; microcable connector; microelectronic multiplexer; microwire glass electrodes; neural tissue; retinal prosthesis; ribbon bonding; very large format neural stimulator device; Bonding; CMOS technology; Electrodes; Glass; Humans; Microelectronics; Neural prosthesis; Prosthetics; Retina; Testing; Biomedical; channel glass; electrode array; functional electrical stimulation; implantable devices; microstimulator; retinal prosthesis;
fLanguage :
English
Journal_Title :
Biomedical Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
1932-4545
Type :
jour
DOI :
10.1109/TBCAS.2007.893186
Filename :
4156142
Link To Document :
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