Patent ID: 9387674
Filing Date: 2016-07-12
CPC Classification: B41J

Claim Text:
1. A flow path unit comprising: a pressure chamber substrate in which a plurality of pressure chambers are formed in a first direction next to each other; a lower electrode that is provided above the pressure chamber substrate and that overlaps each of the plurality of pressure chambers; a plurality of piezoelectric elements, each of the plurality of piezoelectric elements having an active section, each of the active sections configured to change a volume of each of the plurality of pressure chambers, each of the active sections being in a longitudinal shape and extending in a second direction perpendicular to the first direction; an upper electrode that is provided on each of the plurality of piezoelectric elements and that overlaps each of the plurality of pressure chambers; and a communication hole connected to each of a plurality of nozzles, wherein in a plan view, each of the active sections has a widest width in the first direction located at one longitudinal end thereof, an overlapped area of the lower electrode, the piezoelectric element and the upper electrode is each of the active sections, and in the plan view, the communication hole is located completely within an area of the overlapped area and the one longitudinal end of each of the active sections.