US 6,886,923 B2 · Small-sized liquid-jet head and liquid-jet apparatus with increased number of arrays of nozzle orifices

Abstract

Disclosed is a liquid-jet head and a Liquid-jet apparatus, which are capable of reliably supplying a driving voltage to a driving IC, increasing the number of arrays of nozzle orifices, and being made small-sized. The liquid-jet head comprises a passage-forming substrate in which a pressure generating chamber communicating with an nozzle orifice is defined, and piezoelectric elements; each piezoelectric element being provided in the passage-forming substrate via a vibration plate, wherein a joint plate, on which a driving IC and a wiring pattern are provided, to an upper portion of which is connected an external wiring, is joined to the piezoelectric element side of the passage-forming substrate, a plurality of driving voltage supply pads, to which a driving voltage to be distributed to each piezoelectric element is supplied, are provided on the driving IC along a long direction of the driving IC, the adjacent driving voltage supply pads being electrically connected by a connection wiring formed of a conductive wire, and the driving voltage supply pad in an end portion of the driving IC in the long direction thereof and the wiring pattern being electrically connected by the connection wiring.

Claims14

Dependent claims

A liquid-jet head comprising:

a passage-forming substrate in which pressure generating chambers communicating with nozzle orifices are defined, and
piezoelectric elements;
each piezoelectric element being provided in the passage-forming substrate via a vibration plate,
wherein a joint plate, on which driving ICs and a wiring pattern are provided, to an upper portion of which is connected an external wiring, is joined to the piezoelectric element side of the passage-forming substrate, a plurality of driving voltage supply pads, to which a driving voltage to be distributed to each piezoelectric element is supplied, are provided on the driving IC along a long direction of the driving IC, the adjacent driving voltage supply pads being electrically connected by a connection wiring formed of a conductive wire, and the driving voltage supply pad in an end portion of the driving IC in the long direction thereof and the wiring pattern being electrically connected by the connection wiring.

1 more element

A liquid-jet head comprising:

a passage-forming substrate in which pressure generating chambers communicating with nozzle orifices are defined;
and
piezoelectric elements including a lower electrode, a piezoelectric layer and an upper electrode, which are provided in the passage-forming substrate via a vibration plate,
wherein a joint plate connected to the piezoelectric element side of the passage-forming substrate is provided;
a wiring pattern, to which an external wiring is connected, is provided on the joint plate;
at least two driving ICs for driving the piezoelectric elements are loaded on the joint plate at predetermined intervals in a direction where the pressure generating chambers are provided in parallel;
a driving voltage supply pad, to which a driving voltage to be distributed to the piezoelectric elements is supplied, is provided on the driving ICs;
signal input pads connected to connection wirings extensively provided from the wiring pattern are provided in the driving IC;
signal output pads, from which part of the driving signal inputted thereto is outputted, are provided in the driving IC;
and the signal output pads of one driving IC adjacent to the other driving IC and the signal input pads of the other driving IC are connected by a coupling wiring.

7 more elements

Dependencies are inferred from the claim text.

Small-sized liquid-jet head and liquid-jet apparatus with increased number of arrays of nozzle orifices

Life of this patent

Small-sized liquid-jet head and liquid-jet apparatus with increased number of arrays of nozzle orifices

Life of this patent

Abstract

Claims14