Integrated Immunoassay System Using Multichannel Microchip for Simultaneous Determination

Immunoassay system was integrated on a multichannel microchip. The chip, which has branching channel patterns with weirs, was fabricated by single step wet etching. To prevent contamination of up-flowed samples, pneumatic valves made of silicone rubber were set on a chip. By using the system, 4 assays were successfully performed at a time. We concluded that the system should be practicable.