Pattern electrode structure for electrowetting device

A pattern electrode structure for an electrowetting device, which is laminated between a base material and a dielectric layer of the electrowetting device, the pattern electrode structure comprising:

• a plurality of first branch electrodes formed in a direction perpendicular to any plane perpendicular to a plane defined by the pattern electrode structure;
• and
• a plurality of basal pattern electrodes formed in an area below lower ends of each of the plurality of first branch electrodes, and connected to an electrode connection portion configured to receive a voltage;
• and
• a hydrophobic coating layer laminated on the electrode structure;
• wherein the hydrophobic coating layer is partially laminated on the electrode structure;
• wherein the plurality of first branch electrodes and the plurality of basal pattern electrodes have different polarities;
• wherein a height of a lower end of the hydrophobic coating layer is equal to or lower than a height of a lowermost end of each of the plurality of first branch electrodes, and the height of the lower end of the hydrophobic coating layer is higher than a height of a lowermost end of each of the plurality of basal electrodes;
• and
• wherein the hydrophobic coating layer is not formed on the plurality of basal electrodes at a height lower than a predetermined height from the lowermost end of each of the plurality of first branch electrodes.