Abstract: The present invention aims at providing a piezoelectric substrate with high joining strength between an electrode of the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate-shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes and a second electrode disposed on one main surface of the piezoelectric ceramic layer, a third electrode disposed on the other main surface of the piezoelectric ceramic layer so as to oppose to the first electrodes, and a through-conductor electrically connecting the second electrode and the third electrode. The second electrode includes a connection portion connected to the through-conductor, and a small-width portion having a smaller width than the connection portion when the piezoelectric substrate is viewed from above. The second electrode and the outside are electrically connected to each other at the small-width portion.

Abstract: A liquid ejecting head includes a first compression chamber row 11A on other side of a sub-manifold 5a, which extends in one direction, in other direction, and a second compression chamber row 11B on one side of the sub-manifold 5a in the other direction. First restricting-portion bodies 6Aa and second restricting-portion bodies 6Ba extend in a direction that crosses the one direction, and are alternately arranged in the one direction. First inlets 6Ab are on the one side of the second outlets 6Bc in the other direction. The first inlets 6Ab have an opening width greater than an opening width of the second outlets 6Bc. Channels of the second restricting portions 6B have a similar configuration.

Abstract: The present invention aims at providing a piezoelectric substrate with high joining strength between an electrode of the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate-shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes and a second electrode disposed on one main surface of the piezoelectric ceramic layer, a third electrode disposed on the other main surface of the piezoelectric ceramic layer so as to oppose to the first electrodes, and a through-conductor electrically connecting the second electrode and the third electrode. The second electrode includes a connection portion connected to the through-conductor, and a small-width portion having a smaller width than the connection portion when the piezoelectric substrate is viewed from above. The second electrode and the outside are electrically connected to each other at the small-width portion.

Abstract: A liquid ejecting head includes a first compression chamber row 11A on other side of a sub-manifold 5a, which extends in one direction, in other direction, and a second compression chamber row 11B on one side of the sub-manifold 5a in the other direction. First restricting-portion bodies 6Aa and second restricting-portion bodies 6Ba extend in a direction that crosses the one direction, and are alternately arranged in the one direction. First inlets 6Ab are on the one side of the second outlets 6Bc in the other direction. The first inlets 6Ab have an opening width greater than an opening width of the second outlets 6Bc. Channels of the second restricting portions 6B have a similar configuration.