Liquid-jet head and liquid-jet apparatus

Details Liquid-jet head and liquid-jet apparatus Liquid-jet head and liquid-jet apparatus

2005-08-02

2005-08-02

Pham, Hai (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S070000, C347S071000, C347S072000

Reexamination Certificate

active

06923528

ABSTRACT:
A liquid-jet head includes a passage-forming substrate having a plurality of pressure generation chambers communicating with corresponding nozzle orifices; and a plurality of piezoelectric elements provided on one side of the passage-forming substrate via a vibration plate, each of the piezoelectric elements including a lower electrode, a piezoelectric layer, and an upper electrode. The passage-forming substrate has a plurality of liquid supply paths that are equal in depth with the pressure generation chambers and communicate with corresponding longitudinal ends of the pressure generation chambers for supplying liquid to the pressure generation chambers. A reinforcement film is provided on the vibration plate in regions that face the liquid supply paths. The overall internal stress of the reinforcement film and the vibration plate is tensile.

REFERENCES:
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patent: 2001-205815 (2001-07-01), None
patent: 02001205815 (2001-07-01), None
patent: WO 98/18632 (1998-05-01), None

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