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- W2038607835 abstract "Miniaturization of implantable devices while drastically increasing the number of stimulation channels is one of the greatest challenges in implant manufacturing because a small but hermetic package is needed that provides reliable protection for the electronics over decades. Retinal vision prostheses are the best example for it. This paper presents a miniaturized 232-channel vision prosthesis, summarizing the studies on the individual technologies that were developed, improved and combined to fabricate a telemetrically powered retinal device sample. The implantable unit, which is made out of a high temperature co-fired alumina ceramic package containing hermetic feedthroughs, electronic circuitry and a radio frequency coil for powering is manufactured through a modified screen-printing/lasering process. The package is sealed with solder glass to provide unaffected inductive coupling to the telemetric transmitter. A 0.05 cc inner volume allows helium leak testing and mathematical lifetime estimations for moisture-induced failure of up to 100 years. The feedthroughs contact a thin-film polyimide electrode array that utilizes DLC and SiC coatings for improved interlayer adhesion of the metallic tracks to the polymer carrier. Two metal layers allow integrated wiring of the electrode array within the very limited space." @default.
- W2038607835 created "2016-06-24" @default.
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- W2038607835 date "2012-08-01" @default.
- W2038607835 modified "2023-09-27" @default.
- W2038607835 title "A 232-channel retinal vision prosthesis with a miniaturized hermetic package" @default.
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- W2038607835 doi "https://doi.org/10.1109/embc.2012.6346545" @default.
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