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US 8,985,734 B2Granted
Liquid jetting apparatus, piezoelectric actuator, and method for producing the liquid jetting apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorHirofumi Kondo
Life of this patent
Estimating the term…
Abstract
A liquid jetting apparatus includes a channel unit in which a liquid channel including a nozzle for jetting a liquid is formed, and a piezoelectric actuator provided on the channel unit and configured to apply jetting energy to the liquid inside the liquid channel. The piezoelectric actuator has a piezoelectric element and a wiring substrate in which a first electrode and a wire electrically connected to the first electrode are formed and which is joined to one surface of the piezoelectric element. The first electrode is configured to make contact with the piezoelectric element.
Claims21
A liquid jetting apparatus for jetting a liquid, the apparatus comprising:
- a channel unit in which a liquid channel including a nozzle for jetting the liquid is formed;
- and
- a piezoelectric actuator which is provided on the channel unit and which applies jetting energy to the liquid inside the liquid channel;
- wherein the piezoelectric actuator comprises:
- a piezoelectric element;
- and
- a wiring substrate in which a first electrode and a wire electrically connected to the first electrode are formed and which is joined to one surface of the piezoelectric element;
- wherein the first electrode makes contact with the piezoelectric element;
- wherein a portion, of the wiring substrate, at which the first electrode is formed is thinner than any portion, of the wiring substrate, different from the portion at which the first electrode is formed;
- and
- wherein the wiring substrate includes:
- an atmosphere communication passage;
- and
- a communication portion communicated with the atmosphere communication passage.
11 more elements
A liquid jetting apparatus for jetting a liquid, the apparatus comprising:
- a channel unit in which a liquid channel including a nozzle for jetting the liquid is formed;
- and
- a piezoelectric actuator which is provided on the channel unit and which applies jetting energy to the liquid inside the liquid channel;
- wherein the piezoelectric actuator comprises:
- a piezoelectric element;
- and
- a wiring substrate in which a first electrode and a wire electrically connected to the first electrode are formed and which is joined to one surface of the piezoelectric element;
- wherein the first electrode makes contact with the piezoelectric element;
- and
- wherein the wiring substrate includes:
- an atmosphere communication passage;
- and
- a communication portion communicated with the atmosphere communication passage.
10 more elements
A liquid jetting apparatus for jetting a liquid, the apparatus comprising:
- a channel unit in which a liquid channel including a nozzle for jetting the liquid is formed;
- and
- a piezoelectric actuator which is provided on the channel unit and which applies jetting energy to the liquid inside the liquid channel;
- wherein the piezoelectric actuator comprises:
- a piezoelectric element;
- and
- a wiring substrate in which a first electrode and a wire electrically connected to the first electrode are formed and which is joined to one surface of the piezoelectric element;
- wherein the first electrode makes contact with the piezoelectric element;
- wherein a plurality of first grooves are formed on a joint surface of the wiring substrate with respect to the piezoelectric element, and the first electrode is formed by a conductive material filled in the first grooves;
- wherein on a surface of the wiring substrate opposite to the joint surface with respect to the piezoelectric element, a second groove which has a width greater than that of each of the first grooves is formed;
- wherein the second groove is communicated with the first grooves via a through hole penetrating through the wiring substrate in a thickness direction of the wiring substrate;
- wherein the first electrode is formed on the joint surface of the wiring substrate by the conductive material filled in the first grooves from the second groove via the through hole;
- and
- wherein the wire electrically connected to the first electrode is formed on the surface of the wiring substrate opposite to the joint surface.
11 more elements
A piezoelectric actuator comprising:
- a piezoelectric element;
- and
- a wiring substrate in which a first electrode and a wire electrically connected to the first electrode are formed and which is joined to one surface of the piezoelectric element;
- wherein the first electrode makes contact with the piezoelectric element;
- wherein the wiring substrate is thinned at a portion at which the first electrode is formed;
- and
- wherein the wiring substrate includes:
- an atmosphere communication passage;
- and
- a communication portion communicated with the atmosphere communication passage.
7 more elements
A method for producing a liquid jetting apparatus including:
- a channel unit in which a liquid channel including a nozzle for jetting the liquid is formed;
- and a piezoelectric actuator which includes a piezoelectric element and a wiring substrate joined to one surface of the piezoelectric element, and which is provided on the channel unit to apply jetting energy to the liquid inside the liquid channel;
- the method comprising:
- a groove formation step for forming a plurality of first grooves on a joint surface of the wiring substrate with respect to the piezoelectric element;
- and
- an electrode formation step for forming a first electrode on the joint surface and joining the joint surface of the wiring substrate to the piezoelectric element by filling the first grooves with a liquid conductive material;
- wherein the wiring substrate includes:
- an atmosphere communication passage;
- and
- a communication portion communicated with the atmosphere communication passage.
7 more elements
A piezoelectric actuator comprising:
- a piezoelectric element;
- and
- a wiring substrate in which a first electrode and a wire electrically connected to the first electrode are formed and which is joined to one surface of the piezoelectric element;
- wherein the first electrode makes contact with the piezoelectric element;
- and
- wherein the wiring substrate includes:
- an atmosphere communication passage;
- and
- a communication portion communicated with the atmosphere communication passage.
6 more elements
Dependencies are inferred from the claim text.