| 摘要 |
Provided are a liquid jet head and a liquid jet apparatus which are capable of obtaining a good and stable liquid ejecting property while preventing lowering of a displacement amount of a vibration plate. The liquid jet head includes a passage-forming substrate in which pressure generating chambers communicating with nozzle orifices ejecting liquids are formed, and piezoelectric elements which are provided on one side of the passage-forming substrate with a vibration plate interposed between the elements and the plate. Each of the piezoelectric elements includes a lower electrode, a piezoelectric layer and an upper electrode. In the liquid jet head, a plurality of pressure generating chambers are arranged in a width direction thereof, and the lower electrode is continuously provided from a region facing the pressure generating chambers to a region facing compartment walls at both sides in the width direction of the pressure generating chambers. The liquid jet head includes a lead electrode for lower electrode, which is drawn out from the lower electrode in the region facing the compartment walls. 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.
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