US Patent 9108173 Droplet-generating method and device

A droplet-generating device is provided. The droplet-generating device comprises a first microchannel and a second microchannel. The first microchannel includes a first fluid inlet and a second fluid inlet. The second microchannel crossing over and communicating with the first microchannel at an intersectional region includes a third fluid inlet, a fourth fluid inlet, a fluid outlet, a three-way junction and a side wall. The intersectional region is configured between the third fluid inlet and the three-way junction, and the side wall is disposed between the fourth fluid inlet and the fluid outlet and extended downward. A method of producing a droplet is also provided.