Patent ID: 8717281

Claim:
An electrofluidic device, comprising: a first structure layer, comprising: a first substrate; a first electrode, disposed on the first substrate; a second electrode, disposed on the first substrate, wherein the second electrode has an indent region surrounding the first electrode without contact; and a first hydrophobic layer, disposed on the second electrode; a second structure layer, located at one side of the first structure layer, and separating by a gap, the second structure layer comprising: a second substrate; a groove structure layer, disposed on the second substrate, wherein the groove structure layer has an indent groove, corresponding to the indent region of the second electrode; and a second hydrophobic layer, disposed on the groove structure layer; a polar fluid, disposed in the indent groove and remaining a contact with the first electrode; and a non-polar fluid, disposed in the gap between the first structure layer and the second structure layer, and forming a fluid interface with the polar fluid.