Patent ID: 6802597
Filing Date: 2004-10-12
Classification: B41J

Abstract:
A liquid-jet head including a passage-forming substrate in which a pressure generating chamber communicating with a nozzle orifice is defined and a piezoelectric element composed of a lower electrode, a piezoelectric layer and an upper electrode on one surface of the passage-forming substrate via a vibration plate interposed therebetween, the liquid-jet head comprising:a sealing plate joined to a piezoelectric element side of the passage-forming substrate and having a piezoelectric element holding portion, the sealing plate hermetically sealing a space secured in a region facing the piezoelectric element to an extent not to hinder a movement thereof; and a lead electrode provided on the passage-forming substrate and drawn out from any of the electrodes of the piezoelectric element to an area outside of the piezoelectric element holding portion, wherein the sealing plate has a plurality of micro penetrated holes penetrating therethrough in a thickness direction thereof, and on all of an inner surface of each penetrated hole, a wiring electrode is provided, one end thereof being connected to the lead electrode in the outside of the piezoelectric element holding portion, and other end thereof being connected to a drive wiring extended from a drive circuit for driving the piezoelectric element on an opening edge portion of the penetrated hole on an opposite side with the passage-forming substrate.