Patent ID: 8419172

Claim:
A liquid jet head, comprising: a piezoelectric substrate including a plurality of narrow grooves formed therein from a front end to a rear end of a surface of the piezoelectric substrate, the plurality of narrow grooves being separated from one another by side walls formed of a piezoelectric body, the piezoelectric substrate having side wall electrodes for driving on wall surfaces of the side walls, and having, on a top surface thereof in proximity of rear ends of the side walls, lead-out electrodes electrically connected to the side wall electrodes; a cover plate including a manifold which communicates to the plurality of narrow grooves for supplying liquid to the plurality of narrow grooves, the cover plate being bonded to the piezoelectric substrate so as to cover a surface region from the front end to before the lead-out electrodes; and a sealing material for blocking, of channels formed by the cover plate and the plurality of narrow grooves, openings of rear channels communicating to the manifold and formed on the rear end side with respect to the manifold.