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US 10,882,314 B2Granted
Liquid ejection head, method for producing liquid ejection head, and liquid ejection apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMineo Shimotsusa, Shinya Iwahashi, Sadayoshi Sakuma, Ichiro Saito
Life of this patent
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Abstract
A liquid ejection head and its manufacturing method are capable of reducing the thickness of a protective layer as compared to the traditional technique so as to efficiently transfer the heat energy generated by a heating resistance element to a droplet of liquid such as ink. To achieve this, power supply wirings are provided in the same layer below the heating resistance element.
Claims15
A liquid ejection head comprising:
- a substrate;
- an insulating layer provided on a side of a surface of the substrate;
- an energy generating element provided in contact with a surface of the insulating layer for generating thermal energy for ejecting liquid;
- a temperature detecting element provided inside the insulating layer and provided so as to at least partly overlap the energy generating element as viewed from a direction perpendicular to the surface of the substrate;
- a protective layer that covers a surface of the energy generating element;
- a first wire that is in contact with a back surface of the energy generating element, the back surface being on a side opposite to the surface of the energy generating element;
- and
- a second wire connected to the temperature detecting element,
- wherein the first wire and the second wire are disposed in a recess provided on the surface of the insulating layer and are located at a same level with respect to the direction perpendicular to the surface of the substrate.
6 more elements
A method for producing a liquid ejection head, comprising:
- a temperature detecting element formation step of forming a temperature detecting element inside an insulating layer;
- a wire formation step of forming a recess on a surface of the insulating layer and forming a first wire and a second wire connected to the temperature detecting element in the recess;
- an energy generating element formation step of forming an energy generating element that generates thermal energy for ejecting liquid so as to be in contact with a surface of the first wire and the surface of the insulating layer;
- and
- a protective layer formation step of forming a protective layer that covers a surface of the energy generating element.
2 more elements
A liquid ejection apparatus capable of using a liquid ejection head comprising:
- a substrate;
- an insulating layer provided on a side of a surface of the substrate;
- an energy generating element provided in contact with a surface of the insulating layer for generating thermal energy for ejecting liquid;
- a temperature detecting element provided inside the insulating layer and provided so as to at least partly overlap the energy generating element as viewed from a direction perpendicular to the surface of the substrate;
- a protective layer that covers a surface of the energy generating element;
- a first wire that is in contact with a back surface of the energy generating element, the back surface being on a side opposite to the surface of the energy generating element;
- and
- a second wire connected to the temperature detecting element,
- wherein the first wire and the second wire are disposed in a recess provided on the surface of the insulating layer and are located at a same level with respect to the direction perpendicular to the surface of the substrate.
6 more elements
Dependencies are inferred from the claim text.