Patent ID: 7641312
Filing Date: 2010-01-05
Classification: B41J

Abstract:
1. A liquid ejecting head for ejecting a liquid drop from a nozzle opening by changing a pressure of a liquid inside a pressure chamber interconnected to the nozzle opening, comprising: a nozzle plate including a nozzle substrate made of a non-conductive material, the nozzle opening being formed to pass through the nozzle substrate, the nozzle opening having a narrow part formed on an ejection surface side of the nozzle substrate and an enlarged part formed on an opposite ejections surface side with respect to the narrow part, the enlarged part having a sectional area larger than a sectional area of the narrow part with respect to a section perpendicular to an ejection direction of the liquid drop; a conductive film formed on an inner peripheral wall surface of the narrow part, the conductive film being made of Ni or NiCr, a film forming area of the conductive film including a moving range of a meniscus which moves on the inner peripheral wall surface of the narrow part in accordance with an ejection operation of the liquid drop from the nozzle opening and; a water repellent film made of a water repellent material, the water repellent film being formed on a surface of the nozzle substrate on the ejection surface side and not formed on the inner peripheral wall surface of the narrow part.