摘要:
A droplet ejector and an ink-jet printhead using the same are provided. The droplet ejector comprises a fluid path through which a fluid (114) moves, a nozzle (110) being formed on one end of the fluid path, a volumetric structure (120), which is formed in the fluid path, is sensitive to an external stimulus, and expands to eject droplets through the nozzle, and a stimulus generator, which applies a stimulus to the volumetric structure. The volumetric structure is formed of stimulus sensitive hydrogel.