Control mechanism for trace quantity of liquid

摘要

In order to be capable of handling quantitatively a liquid in a simple structure by only easy operations, a control mechanism comprises a first flow channel and a second flow channel each extending along a predetermined direction; and a third flow channel having a thinner thickness than that of the first flow channel and that of the second flow channel; the above-described third flow channel being opened on flow channel walls of the first flow channel and the second flow channel, respectively, whereby the third flow channel links the first flow channel to the second flow channel; a liquid introduced into the first flow channel being pulled in the third flow channel due to a capillary phenomenon through an opening of the third flow channel opened on the flow channel wall of the first flow channel, and then, the liquid remained in the first flow channel being removed to prepare a droplet having a volume corresponding to a capacity of the third flow channel.