Patent ID: 9227402
Filing Date: 2016-01-05
CPC Classification: B41J

Claim Text:
1. A liquid jet head comprising: a side wall disposed between an ejection channel that ejects liquid droplets and a non-ejection channel that does not eject liquid droplets, and in which two piezoelectric materials having mutually different polarization directions are laminated in a height direction, interposing a polarization boundary; an upper member fixed to an upper end of the side wall and installed on an upper portion of the channels; a lower member fixed to a lower end of the side wall and installed on a lower portion of the channels; and an electrode installed on a wall surface of the side wall, wherein the polarization boundary is positioned above ½ a depth of the ejection channel, and the electrode is installed from an upper end of the wall surface, to a vicinity of the polarization boundary, or below the polarization boundary and above a lower end of the wall surface.