Patent ID: 6830319
Filing Date: 2004-12-14
Classification: B41J

Abstract:
A head chip in which grooves defined by sidewalls are provided in one surface of a substrate and in which by applying voltage to electrodes provided on the side walls, ink in the grooves is ejected from nozzle openings of a nozzle plate joined to one surface of the substrate,wherein: a plurality of piezoelectric ceramic members extending in a reference direction are embedded in one surface of an insulating main body of the substrate to form the substrate; the grooves are formed at predetermined intervals so as to extend over the row of piezoelectric ceramic members to thereby provide the side walls; the electrodes are provided in the regions of the side walls where the piezoelectric ceramic members are provided to thereby form drive portions for independent driving; and the nozzle openings are provided at positions corresponding to the drive portions of the grooves to form a plurality of nozzle rows.