The development of a multichannel electrode array for retinal prostheses

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

Research output: Contribution to journalArticle

26 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 languageEnglish
Pages (from-to)263-266
Number of pages4
JournalJournal of Artificial Organs
Volume9
Issue number4
DOIs
Publication statusPublished - Dec 1 2006

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Visual Prosthesis
Prosthetics
Electrodes
Electroplating
Centers for Disease Control and Prevention (U.S.)
Platinum
Charge density
Polyimides

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering
  • Cardiology and Cardiovascular Medicine

Cite this

The development of a multichannel electrode array for retinal prostheses. / Terasawa, Yasuo; Tashiro, Hiroyuki; Uehara, Akihiro; Saitoh, Tohru; Ozawa, Motoki; Tokuda, Takashi; Ohta, Jun.

In: Journal of Artificial Organs, Vol. 9, No. 4, 01.12.2006, p. 263-266.

Research output: Contribution to journalArticle

Terasawa, Y, Tashiro, H, Uehara, A, Saitoh, T, Ozawa, M, Tokuda, T & Ohta, J 2006, 'The development of a multichannel electrode array for retinal prostheses', Journal of Artificial Organs, vol. 9, no. 4, pp. 263-266. https://doi.org/10.1007/s10047-006-0352-1
Terasawa, Yasuo ; Tashiro, Hiroyuki ; Uehara, Akihiro ; Saitoh, Tohru ; Ozawa, Motoki ; Tokuda, Takashi ; Ohta, Jun. / The development of a multichannel electrode array for retinal prostheses. In: Journal of Artificial Organs. 2006 ; Vol. 9, No. 4. pp. 263-266.
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