| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink-jet printhead having an improved structure that can improve linearity of ejected ink droplets and increase a drive frequency. SOLUTION: The ink-jet printhead includes a substrate having an ink chamber formed on the front side of the substrate to be filled with an ink to be ejected and a manifold formed on the backside of the substrate for supplying the ink to the ink chamber, a large number of protective layers laminated on the substrate and made of an insulating material, a nozzle plate which has a heat dissipation layer laminated on the protective layer and made of a thermally conductive metallic material and has a nozzle penetrating through and connected with the ink chamber, two heaters provided symmetrically about the nozzle between the protective layers of the nozzle plate for heating the ink in the ink chamber and a conductor for applying a current to the heaters. Two ink channels connecting the ink chamber and the manifold are formed symmetrically about the nozzle between the ink chamber and the manifold. Thus, the drive frequency of the printhead is improved. COPYRIGHT: (C)2005,JPO&NCIPI
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