Realistic imitation of mosquito´s proboscis -sharp and jagged needle and their cooperative inserting motion-

Aiming at the use in low-invasive medical treatments, this paper proposes a realistic imitation of mosquito´s proboscis. A silicon needle is electrochemically etched, making the three-dimensionally sharp tip with finely smooth surface. The jagged shank shape is machined by DRIE. The combined needles comprising a central straight needle and two outer jagged needles are fabricated, imitating a labrum and two maxillas of the mosquito, respectively. The cooperative motion of the three needles imitating the mosquito´s motion is realized by applying PZT actuators independently to all the needles. The effectiveness of inserting these needles cooperatively was experimentally confirmed.