Patent ID: 7922291

Claim:
An ink jet head comprising: an actuator including a plurality of terminals arranged in arrays on a surface of the actuator, for applying pressure corresponding to a plurality of energy generators for ejecting ink; a wiring material coupled with a base made of a flexible resin film on which a plurality of lands are arranged in arrays corresponding to the plurality of terminals, the wiring material of which one end is superimposed on the surface of the actuator, and which extended to a direction parallel to the surface of the actuator as an extended portion; and a drive circuit for driving the actuator; wherein the terminals and the lands are bonded by thermocompression; wherein the wiring material includes a small width portion, of which a width in a direction perpendicular to an extended direction of the wiring material is smaller than that of the one end superimposed on the actuator, arranged on the extended portion; wherein the drive circuit is mounted on the extended portion; wherein wiring patterns are formed on the wiring material, for connecting the drive circuit and the plurality of lands; wherein the small width portion is a notch formed in a vicinity of the one end superimposed on the actuator; wherein the notch is provided in each end in the width direction of the wiring material; and wherein the notch is provided between portions of the wiring material which have widths larger than the width of the small width portion in the direction perpendicular to the extended direction of the wiring material.