Patent ID: 7210769
Filing Date: 2007-05-01
Classification: B41J

Abstract:
1. A liquid jet head including a passage-forming substrate in which pressure generating chambers communicating with nozzle orifices ejecting liquids are formed, and piezoelectric elements being provided on one side of the passage-forming substrate with a vibration plate interposed between the elements and the substrate, each of the piezoelectric elements including a lower electrode, a piezoelectric layer and an upper electrode, the liquid jet head comprising: a lead electrode for lower electrode, which is drawn out from the lower electrode in a region facing compartment walls at both sides in a width direction of the pressure generating chambers, wherein a plurality of pressure generating chambers are arranged in the width direction thereof, the lower electrode is continuously provided from a region facing the pressure generating chambers to the region facing the compartment walls, and the lead electrode for lower electrode at least includes a first lead electrode having a width which is either equivalent to or narrower than that of the compartment wall and a second lead electrode which is formed on the first lead electrode and is wider than the first lead electrode.