Liquid discharge head

A liquid discharge head, comprising a piezoelectric block formed by stacking multiple piezoelectric substrates, each of the multiple piezoelectric substrates including a first main surface and a second main surface and having a first groove and a second groove alternately formed in the first main surface,

• wherein the each of the multiple piezoelectric substrates includes a first in-groove electrode on an inner surface of the first groove, a first rear surface electrode on the second main surface at a location corresponding to the second groove, a second in-groove electrode on an inner surface of the second groove, and a second rear surface electrode on the second main surface at a location corresponding to the first groove, the first rear surface electrode being defined at the same potential as a potential of the first in-groove electrode, the second rear surface electrode being defined at the same potential as a potential of the second in-groove electrode, and
• wherein the first groove forms a pressure chamber having the first in-groove electrode and the first rear surface electrode formed on the inner surface thereof, the pressure chamber including an inlet opening and an outlet opening of liquid and being configured to store the liquid supplied from the inlet opening and discharge the liquid through the outlet opening by deformation of the piezoelectric block by piezoelectric effect, and the second groove forms an opening portion having the second in-groove electrode and the second rear surface electrode formed on the inner surface thereof.