| 摘要 |
A liquid transfer device includes therein a liquid flow passage in which an insulating region and a neighboring region lower in liquid-repellent than the insulating region and neighboring the insulating region in the direction of flow of liquid, are formed on a flow passage defining face. A first electrode is covered with a flow passage area provided in the insulating region so as to neighbor the neighboring region and extend over the whole length of the insulating region in the direction of flow of liquid. A second electrode is covered with a first bubble hold area provided in the insulating region so as to neighbor the neighboring region. By controlling the potentials of the first and second electrodes, the liquid flow passage is changed over between a first state wherein liquid can be transferred on the flow passage area, and a second state wherein the liquid flow passage is closed by a meniscus formed such that the flow passage area is covered with no liquid.
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