Patent ID: 7469993
Filing Date: 2008-12-30
Classification: B41J

Abstract:
1. An inkjet recording head comprising: nozzles that jet ink droplets; pressure chambers that communicate with the nozzles and contain ink; a diaphragm that configures part of the pressure chambers; an ink pool chamber that pools ink to be supplied to the pressure chambers via ink flow paths; and piezoelectric elements that cause the diaphragm to be displaced; wherein the ink pool chamber is disposed opposite from the pressure chambers in a vertical direction with the diaphragm being sandwiched therebetween, and drive ICs that apply a voltage to the piezoelectric elements are mounted on a piezoelectric element substrate formed to include the diaphragm, and the drive ICs respectively have a plurality of bumps which are connected to the piezoelectric element substrate, and are disposed at an outer side of the ink pool chamber, wherein interconnects disposed at the piezoelectric element substrate and connecting the piezoelectric elements and the drive ICs have interconnects arrangement in which a pitch between each wire is 10 μm or less.