Patent ID: 8040583

Claim:
A liquid device, comprising: a first electrode and a second electrode between which voltage is applied; an insulating part that is formed on a surface of said first electrode and structurally insulates said first electrode from said second electrode; and a liquid that is disposed between said insulating part and said second electrode and has polarity, wherein an electric field being applied to said insulating part through voltage application between said first electrode and said second electrode to thereby control wettability of a surface of said insulating part to said liquid and cause deformation or displacement of said liquid, said insulating part is formed of a double-layer structure with a first layer and a second layer, said first layer is formed between said second layer and the surface of said first electrode and has a higher dielectric property and a higher insulating property than said second layer, and said second layer is formed between said first layer and said liquid and has higher water repellency than said first layer.