Thermally-driven ink-jet printhead without cavitation damage of heater

摘要

A thermally-driven ink-jet printhead comprises a substrate including an ink channel (104) connecting an ink chamber (106) and a manifold (102); first and second sidewalls (111, 112); a nozzle plate; a heater between the nozzle (108) and a conductor inside the nozzle plate and electrically connected to the heater. The inner surfaces of each of the first sidewalls are uneven due to the presence of several convex and concave grooves. The sidewalls are formed to a predetermined depth from the surface of the substrate and surrounds the ink chamber to have a rectangular shape. The first sidewall is arranged in a widthwise direction of the ink chamber and the second sidewall is arranged in a lengthwise direction of the ink chamber.