Patent ID: 8876263
Filing Date: 2014-11-04
Classification: B41J

Abstract:
1. A liquid ejection head comprising: a plurality of pressure chambers communicating with respective ejection ports for ejecting liquid and arranged to store liquid to be ejected from the ejection ports, the wall section of each of the pressure chambers being formed by means of a piezoelectric material; and a plurality of hollow spaces arranged around the pressure chambers and separated from the pressure chambers by gaps, wherein the pressure chambers and the hollow spaces are formed in a piezoelectric block produced by laminating a plurality of piezoelectric plates made of a piezoelectric material, a plurality of first grooves being formed on a first surface of each of the piezoelectric plates so as to extend in a first direction, a plurality of second grooves being formed on a second surface opposite to the first surface of each of the piezoelectric plates so as to extend in the first direction; the plurality of piezoelectric plates are laminated so as to put the first surfaces or the second surfaces of adjacent piezoelectric plates into contact with each other such that the pressure chambers are formed as the first grooves of the paired first surfaces that are held in contact with each other are placed vis-a-vis, and the hollow spaces are formed as the second grooves of the paired second surfaces that are held in contact with each other are placed vis-a-vis; and first electrodes are formed in the first grooves, second electrodes are formed in the second grooves.