| 摘要 |
A cavity unit, which has an increased/decreased number of nozzles (pressure chambers), can be easily manufactured by merely stacking minimum plate units each comprising common elements including a nozzle, a pressure chamber, and a common ink chamber. An arbitrary number of first plates 40, each of which includes common elements of a nozzle 43, a pressure chamber 44, a common ink chamber 42, an ink supply flow passage 45, and an ink flow passage 46, are stacked and joined in a direction of arrangement of the pressure chambers 44. A piezoelectric actuator 2 is placed thereon and joined so that portions of the pressure chambers 44, which are open on first side end surfaces of the first plates 40, are covered therewith. <IMAGE> |
