| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid drop ejection head suitable for fabrication in which high density nozzle arrangement and high viscosity ejection are realized by enhancing pressurization power of a piezoelectric while preventing crosstalk between nozzles, and to provide an ink jet recorder comprising it. SOLUTION: A multilayer piezoelectric 58 is bonded to the pressurizing part on a diaphragm 57 corresponding to each pressure chamber 52, and ink is ejected from a nozzle 51 by pressurizing the pressure chamber 52 through expansion/contraction of the multilayer piezoelectric 58. The multilayer piezoelectric 58 has a free end or is added with a weight member on the side opposite to the diaphragm bonding face, and individual electrodes are wired to the outside collectively through a flexible board 59. With regard to the planar shape of the pressure chamber 52 when viewed from the diaphragm 57 side, aspect ratio of the pressure chamber defined by the minimum value/maximum value of inter-wall distance (line-of-sight distance) in the pressure chamber 52 satisfies a relation 0.45≤aspect ratio≤0.89. COPYRIGHT: (C)2005,JPO&NCIPI
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