The development of a multichannel electrode array for retinal prostheses

Yasuo Terasawa; Hiroyuki Tashiro; Akihiro Uehara; Tohru Saitoh; Motoki Ozawa; Takashi Tokuda; Jun Ohta

doi:10.1007/s10047-006-0352-1

The development of a multichannel electrode array for retinal prostheses

Yasuo Terasawa, Hiroyuki Tashiro, Akihiro Uehara, Tohru Saitoh, Motoki Ozawa, Takashi Tokuda, Jun Ohta

Division of Medical Technology

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

The development of a multielectrode array is the key issue for retinal prostheses. We developed a 10 × 10 platinum electrode array that consists of an 8-μm polyimide layer sandwiched between 5-μm polymonochloro-para- xylylene (parylene-C) layers. Each electrode was formed as a 30-μm-high bump by Pt/Au double-layer electroplating. We estimated the charge delivery capability (CDC) of the electrode by measuring the CDCs of two-channel electrode arrays. The dimensions of each electrode of the two-channel array were the same as those of each electrode formed on the 10 × 10 array. The results suggest that for cathodic-first (CF) pulses, 80% of electrodes surpassed our development target of 318 μC/cm², which corresponds to the charge density of pulses of 500 μs duration and 200 μA amplitude for a 200-μm-diameter planar electrode.

Original language	English
Pages (from-to)	263-266
Number of pages	4
Journal	Journal of Artificial Organs
Volume	9
Issue number	4
DOIs	https://doi.org/10.1007/s10047-006-0352-1
Publication status	Published - Dec 2006

All Science Journal Classification (ASJC) codes

Medicine (miscellaneous)
Biomaterials
Biomedical Engineering
Cardiology and Cardiovascular Medicine

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10.1007/s10047-006-0352-1

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abstract = "The development of a multielectrode array is the key issue for retinal prostheses. We developed a 10 × 10 platinum electrode array that consists of an 8-μm polyimide layer sandwiched between 5-μm polymonochloro-para- xylylene (parylene-C) layers. Each electrode was formed as a 30-μm-high bump by Pt/Au double-layer electroplating. We estimated the charge delivery capability (CDC) of the electrode by measuring the CDCs of two-channel electrode arrays. The dimensions of each electrode of the two-channel array were the same as those of each electrode formed on the 10 × 10 array. The results suggest that for cathodic-first (CF) pulses, 80% of electrodes surpassed our development target of 318 μC/cm2, which corresponds to the charge density of pulses of 500 μs duration and 200 μA amplitude for a 200-μm-diameter planar electrode.",

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AU - Terasawa, Yasuo

AU - Tashiro, Hiroyuki

AU - Uehara, Akihiro

AU - Saitoh, Tohru

AU - Ozawa, Motoki

AU - Tokuda, Takashi

AU - Ohta, Jun

PY - 2006/12

Y1 - 2006/12

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The development of a multichannel electrode array for retinal prostheses

Abstract

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