| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid droplet ejection head with a high joining reliability by decreasing the nozzle down caused by breakage of a filter pillar. <P>SOLUTION: In a liquid droplet ejection head 20 that has a plurality of nozzles 21a that eject the droplets; a pressurized liquid chamber 22 that communicates to each nozzle 21a; a driving means that pressurizes the liquid in the pressurized liquid chamber 22; and an ink supply passage 24 that supplies the liquid to each of a plurality of pressurized liquid chambers 22 respectively, wherein the ink supply passage 24 has at least one pillar-shaped projection 36a as a filter 36 for removal of the foreign body, the length of the pillar-shaped projection 36a is formed shorter than the height of the pressurized liquid chamber 22. <P>COPYRIGHT: (C)2013,JPO&INPIT |
