Patent ID: 7588641
Filing Date: 2009-09-15
Classification: B01F,B01J,B01L,C40B

Abstract:
1. A droplet formation device of a mixed liquid, comprising: a raw material liquid delivery section having a plurality of capillaries each of which stores therein one of a plurality of raw material liquids for forming a droplet of the mixed liquid; a substrate which is disposed opposite to the tips of said each capillary and on which the droplet of said mixed liquid formed from two or more of said plurality of raw material liquids each delivered from the tip of its associated capillary is mounted, a voltage applying device electrically connected to the raw material liquid delivery section and the substrate and configured so that a pulse voltage is independently applied to each of the two or more of said raw material liquids, each raw material liquid respectively stored in it's respective capillary, and a controller which controls said voltage applying device so that the applied voltage to be applied to at least one of the raw material liquids and the applied voltage to be applied to those of other raw material liquids are adjusted so as to be different from each other in order to control the composition ratio of the mixed liquid forming the droplet, wherein the plurality of said capillaries are arranged symmetrically around one of said capillaries, wherein said controller is configured to control said pulse voltage applying device and the application start timing so as to first start the application of said pulse voltage to said raw material liquid stored in at least one capillary out of said plurality of capillaries, and to subsequently start the application of said pulse voltage to each of said other raw material liquid before or after the first application of the pulse voltage is finished, and wherein the pulse voltage is first applied to the at least one capillary arranged at the center of said plurality of capillaries.