PIEZO-ELECTRIC TYPE INKJET PRINTHEAD

摘要

A piezoelectric inkjet print head is provided to improve reliability of ink discharge performance by preventing damage to a hydrophobic layer around a nozzle. A piezoelectric inkjet print head includes an upper substrate, a reservoir, a restrictor, a middle substrate, a lower substrate(400), and a piezoelectric actuator. A pressure chamber containing ink is formed on the upper substrate. The lower substrate includes a nozzle(410) and a hydrophobic layer(500). The nozzle is formed through on a position corresponding to a damper of the middle substrate by depressing the lower surface(401) of the lower substrate. The hydrophobic layer is formed on the lower side of the lower substrate. The piezoelectric actuator is formed on the upper substrate and supplies driving force to the pressure chamber for discharging ink.