TY - JOUR
T1 - A multimicroelectrode fabricated by silicon dry etching
AU - Takahashi, Kohro
AU - Shoji, Shuichi
AU - Matsuo, Tadayuki
PY - 1987
Y1 - 1987
N2 - In neuro‐physiology, it is important to record neural impulses from the central neural system simultaneously. For this purpose, a silicon substrate which forms a multimicroelectrode was fabricated and a precise fabrication of a 10 μm thick microelectrode with a 30 μm wide tip was achieved by using Si dry etching. The high‐quality insulation of the electrode in a physiological solution was obtained by using Ta and high‐temperature CVD Si3N4. However, Ta itself is not adequate for the recording site because it is oxidized easily in an electrolyte causing the increase of the electrode impedance. Platinum‐black was electroplated on the titanium surface in order to stabilize and reduce the electrode impedance. The interelectrode crosstalk between electrodes and signal attenuation due to the parasitic capacitances were 0.4% and 4.4%, respectively.
AB - In neuro‐physiology, it is important to record neural impulses from the central neural system simultaneously. For this purpose, a silicon substrate which forms a multimicroelectrode was fabricated and a precise fabrication of a 10 μm thick microelectrode with a 30 μm wide tip was achieved by using Si dry etching. The high‐quality insulation of the electrode in a physiological solution was obtained by using Ta and high‐temperature CVD Si3N4. However, Ta itself is not adequate for the recording site because it is oxidized easily in an electrolyte causing the increase of the electrode impedance. Platinum‐black was electroplated on the titanium surface in order to stabilize and reduce the electrode impedance. The interelectrode crosstalk between electrodes and signal attenuation due to the parasitic capacitances were 0.4% and 4.4%, respectively.
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U2 - 10.1002/ecjb.4420700409
DO - 10.1002/ecjb.4420700409
M3 - Article
AN - SCOPUS:0023327768
VL - 70
SP - 86
EP - 92
JO - Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
JF - Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
SN - 8756-663X
IS - 4
ER -