Patent ID: 8323587

Claim:
A microchip device comprising: a microchip in which a liquid flow path is formed for liquid to flow; first and second gas flow paths provided along the liquid flow path on both sides of the liquid flow path; a plurality of first protruding parts which form a first gap section therebetween, the first gap section formed between the liquid flow path and the first gas flow path and having one opening thereof facing the liquid flow path and the other opening thereof facing the first gas flow path; a plurality of second protruding parts which form a second gap section therebetween, the second gap section formed between the liquid flow path and the second gas flow path and having one opening thereof facing the liquid flow path and the other opening thereof facing the second gas flow path; a plurality of first electrodes, including a first electrode, which are provided on walls of the plurality of first protruding parts, facing the first gap section; wherein the first electrode is provided within 30 μm from the first gap section; and a plurality of second electrodes, including a second electrode, which are provided on walls of the plurality of second protruding parts, facing the second gap section; wherein the second electrode is provided within 30 μm from the second gap section, each gap of the first and second gap sections being configured, so as to be a gap through which gas can pass but the liquid cannot pass, and a gas liquid interface being formed at each of the first and second gap sections.