Extracellular recording electrode
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United States of America Patent
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May 9, 2006
Grant Date -
Jun 19, 2003
app pub date -
Jun 20, 2001
filing date -
Jun 20, 2001
priority date (Note) -
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Abstract
A multiple electrode includes a plurality of micro-electrodes provided on a substrate, and a wiring portion for providing an electrical signal to the micro-electrodes or extracting an electrical signal from the micro-electrodes. Each micro-electrode has porous conductive material on its surface, and the impedance of the micro-electrode is 50 k.OMEGA. or less. Preferably, the porous conductive material is gold, and formed by the passage of current at a current density of 1.0 to 5.0 A/dm.sup.2 for 10 to 360 sec. The multiple electrode may include micro-electrodes provided on a substrate in the form of a matrix, a lead line connected to the micro-electrodes, and an electrical junction connected to an end of the lead line.
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