Liquid ejecting head and liquid ejecting apparatus

摘要

A liquid ejecting head includes a flow channel forming substrate having pressure generation chambers communicating with a nozzle opening and arranged in parallel along a lateral direction. A piezoelectric element is provided on one surface of the flow channel forming substrate in correspondence to the pressure generation chamber, and has a first electrode, a piezoelectric layer provided on the first electrode and a second electrode provided on the piezoelectric layer. In a direction intersecting with the arrangement direction of the pressure generation chambers, in boundaries between an active section that is a substantial driving section and an inactive section that is not a substantial driving section of the piezoelectric layer, the first electrode includes a taper section of which a width is gradually decreased toward the boundary from the active section side.

主权项

1. A liquid ejecting head comprising:
a flow channel forming substrate having pressure generation chambers communicating with corresponding nozzle openings; and a piezoelectric element associated with each pressure generation chamber, the piezoelectric element including a first electrode, a piezoelectric layer provided above the first electrode and a second electrode provided above the piezoelectric layer, wherein in a longitudinal direction intersecting with an arrangement direction of the pressure generation chambers, in boundaries between an active section that is a substantial driving section and inactive sections that is not a substantial driving section of the piezoelectric layer, the first electrode includes a first taper section and a second taper section, wherein the first taper section and the second taper section are provided such that a width in the arrangement direction is gradually decreased from the active section to the inactive section, wherein the second electrode does not extend past the first taper section in the longitudinal direction, the first taper section and the second taper section being on opposite longitudinal ends of the active section, and wherein a width of the first electrode in the arrangement direction in the active section is less than a width of the pressure generation chamber in the arrangement direction.