Liquid jet head and a piezoelectric element

Incremental printing of symbolic information – Ink jet – Ejector mechanism

Reexamination Certificate

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Reexamination Certificate

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07896480

ABSTRACT:
A liquid jet head includes a passage-forming substrate composed of a crystal substrate provided with pressure-generating chambers communicating with nozzle orifices and piezoelectric elements disposed on the passage-forming substrate and each composed of a lower electrode, a piezoelectric material layer, and an upper electrode to cause a change of pressure in the pressure-generating chamber. The piezoelectric material layer has a thickness of 5 μm or less and is made of a perovskite-type crystal and is configured such that the distance between an X-ray diffraction peak position derived from the (220) plane of the passage-forming substrate and an X-ray diffraction peak position derived from the (110) plane of the piezoelectric material layer is within a range of 2θ=16.262±0.1 degrees.

REFERENCES:
patent: 6103072 (2000-08-01), Nishiwaki et al.
patent: 6284434 (2001-09-01), Kamei et al.
patent: 2006/0146097 (2006-07-01), Fujii et al.
patent: 2006-278835 (2006-10-01), None

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