Patent ID: 8919926

Claim:
An inkjet head comprising: a nozzle substrate having a nozzle; a vibrating plate formed above the nozzle substrate; a liquid chamber formed by a space between the vibrating plate and the nozzle substrate and separated by partitions; a piezoelectric element formed by sequentially laminating a common electrode, a piezoelectric substance and an individual electrode over the space, the common electrode extending above the partition; a first insulating film having a first opening; a second insulating film formed on the first insulating film and having a second opening; a first wiring connected to the individual electrode and pulled through the first opening and the second opening over the common electrode; a third insulating film formed on the second insulating film and having a third opening; and a fourth insulating film formed on the first wiring and having a fourth opening, wherein the first wiring passes through the third opening and is formed on the third insulating film, wherein the first wiring is exposed from the fourth opening so as to be externally connected, wherein the third insulating film and the fourth insulating film are not formed over at least a portion of the second insulating film that is disposed above the liquid chamber.