Fabrication of Conductive Polymer Micro-Patterns

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  • 導電性高分子のマイクロパターン作製
  • ドウデンセイ コウブンシ ノ マイクロパターン サクセイ

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Abstract

The final goal of this study is to develop a conductive polymer micro-electrode array as a neural interface, which is implantable into a biological system for stimulating peripheral or central nerves. Such an electrode is expected to have more affinity to a biological system than conventional metal electrodes. This time we used polypyrrole (PPy) as the conductive material. In order to develop the PPy-based electrode array, it is necessary to fabricate micro-patterns of PPy. Therefore, we proposed the micro-patterning method using photochemical reaction of oxidative polymerization agents. First, a plastic film was coated with the photochemically reactive agents. Thereafter, the agents were exposed under UV light with a patterned mask so that the PPy patterns could be fabricated on the unirradiated surface after contact with pyrrole vapor. As a result, the 3μm-width patterns could be fabricated, and the conductivities of PPy increased by means of suitable polymerization time. These results suggest that the PPy patterns seem to be applicable to the electrode array.

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