Patent ID: 7654651
Filing Date: 2010-02-02
Classification: B41J

Abstract:
1. A liquid discharge head comprising: a vibration plate provided with a piezoelectric driving section, the vibration plate including a device layer of an SOI substrate; a substrate which supports the vibration plate, the substrate defining a pressure generating chamber communicating with a discharge port to discharge liquid, the pressure generating chamber arranged to correspond to the piezoelectric driving section, at a region of an end portion of the pressure generating chamber in a longitudinal direction, a portion of the substrate on a side of the vibration plate protrudes along the longitudinal direction into the pressure generating chamber in a shape of a step, and the substrate including a handle layer of the SOI substrate; and rib-like members formed on the substrate and extending in the longitudinal direction of the pressure generating chamber, a gap between the rib-like members being filled with a material having a Young's modulus which is smaller than that of a material constituting the vibration plate.