An ink jet head includes a base with front and rear ends having a plurality of channel grooves separated by channel walls each including a piezoelectric extending to the rear end, a cover that is placed on the base to be in contact therewith and opposite to the face of the base that has the channel grooves,...http://www.google.fr/patents/US7293854?utm_source=gb-gplus-shareBrevet US7293854 - Ink jet head
