Abstract: The present invention provides a liquid ejecting module capable of performing stable ejection operation while circulating and supplying fresh ink to the vicinity of ejection ports arranged in high density. To achieve this, a liquid ejecting module includes an element arranged face in which a plurality of ejecting elements are arranged, a circulation flow path including a supply flow path which supplies liquid to a pressure chamber and a collection flow path which collects liquid from the pressure chamber, and a liquid delivery mechanism provided in the circulation flow path for circulating liquid in the pressure chamber. The liquid delivery mechanism is located lower than the element arranged face.

Abstract: Liquid ejection head includes a substrate, a piezoelectric element provided on the substrate, an ejection port forming member provided on the substrate carrying the piezoelectric element. The ejection port forming member has an ejection port and forms a pressure chamber with the substrate. A first thin film is arranged between the substrate and the piezoelectric element to produce a space between the substrate and the first thin film. A second thin film is arranged on the piezoelectric element. The first thin film is arranged so as not to contact the lateral (edge) surface of the piezoelectric element and has a higher rigidity than the second thin film.

Abstract: A liquid ejection head includes a substrate, a piezoelectric element above the substrate, an orifice forming member above the substrate on the piezoelectric-element-provided-side, in which the orifice forming member has an ejection orifice for ejecting liquid and defines a pressure chamber between the orifice forming member and the substrate, and the pressure chamber communicates with the ejection orifice and includes the piezoelectric element therein, a first thin film provided between the substrate and piezoelectric element and defining a space between the first film and the substrate, and a second thin film on the piezoelectric element on the side opposite to the first film side and differing from the first film in rigidity. A communicating port is formed in the substrate in a region facing the space, communicates with the space through an opening having a smaller area than the area of the region, and is closed at an end.

Abstract: A liquid ejection head 1 includes an ejection orifice 12 through which a liquid is ejected, a first liquid flow path 13 which is in communication with the ejection orifice 12 and through which the liquid flows, a second liquid flow path 14 which is in communication with the ejection orifice 12 on the opposite side of the first liquid flow 13 with respect to the ejection orifice 12 and through which the liquid flows, a first electrode 21 positioned in the first liquid flow path 13, and a second electrode 22 which is positioned in the second liquid flow path 14 and generates an electro-osmotic flow in the liquid together with the first electrode 21.

Abstract: The liquid ejection head 1 is provided with: an ejection orifice array 19 arraying multiple ejection orifices 12 in order to eject a liquid; multiple energy-generating elements 11 for generating energy in order to eject the liquid; a substrate 10 provided with the multiple energy-generating elements 11; a through port array 25 arraying multiple through ports 16 penetrating the substrate 10; multiple linear liquid flow paths 13 positioned between the through port array 25 and the ejection orifice array 19, and connected to respective ejection orifices 12 of the ejection orifice array 19 and respective through ports 16 of the through port array 25; and first and second electrode 21 and 22 arranged in each of the multiple liquid flow paths 13, and for generating an electroosmotic flow in the liquid.

Abstract: A liquid ejection head and a liquid ejection apparatus capable of maintaining a high reliability is provided. For this purpose, a first cover member including an aperture and covering a surface of a flow path member facing a print medium of a liquid ejection head, and a second cover member covering a side surface of the liquid ejection head are provided, and a displacement absorption part that absorbs the displacement between the first cover member and the second cover member is provided. Furthermore, the space between the aperture and the flow path member is sealed with a sealing material.

Abstract: A liquid ejection apparatus includes a supply control section 401 that controls the supply and stop of a liquid to pressure chambers communicating with ejection ports to eject the liquid, and a negative pressure generating section 1004 that generates a negative pressure. The liquid ejection apparatus also includes a negative pressure control unit 230 using the negative pressure generated by the negative pressure generating section 1004 to adjust the pressure of the liquid flowing through a collection channel. To stop a flow of the liquid, the supply control section 401 stops the supply of the liquid, and then the negative pressure generating section 1004 is stopped.

Abstract: In a configuration having a circulation flow path in association with an ejection element, there is provided a liquid ejecting apparatus capable of circulating liquid suitably and maintaining stable ejection operation while reducing liquid vaporization, a power supply capacity, and the effect of noise. For this purpose, in a configuration in which liquid delivery mechanisms that facilitate a flow in a flow path are prepared in association with pressure chambers, the liquid delivery mechanisms are divided into a plurality of blocks and the liquid delivery mechanisms included in each of the blocks are driven at different timings.

Abstract: The present invention provides a liquid ejecting module capable of performing stable ejection operation while circulating and supplying fresh ink to the vicinity of ejection ports arranged in high density. To achieve this, a liquid ejecting module includes an element arranged face in which a plurality of ejecting elements are arranged, a circulation flow path including a supply flow path which supplies liquid to a pressure chamber and a collection flow path which collects liquid from the pressure chamber, and a liquid delivery mechanism provided in the circulation flow path for circulating liquid in the pressure chamber. The liquid delivery mechanism is located lower than the element arranged face.

Abstract: A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes a first common supply flow path for horizontally leading a first liquid and a second common supply flow path for horizontally leading a second liquid to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.

Abstract: A plurality of pressure chambers are formed in a circulation channel for liquid in order to array ejection ports in a high density in association with the circulation channel. The circulation channel is connected to a penetration supply path and a penetration recovery path that penetrate a substrate.

Abstract: In a circulating system which circulates liquid within a liquid ejecting head, thickening of liquid in the vicinity of an ejection port can be more securely suppressed. The ejection port includes a first ejection port disposed in an upstream side in an ejecting direction of ink and a second ejection port disposed in a downstream side in the ejecting direction. The second ejection port includes an enlarged diameter portion whose diameter is enlarged in a radially outward manner from at least a part of an opening edge portion of the first ejection port.

Abstract: A cover member includes two end regions located at two ends in a first direction, and two beam portions which extend in the first direction and connect the two end regions together and which, together with the two end regions, form a single opening that exposes a plurality of discharge ports. When a width of the opening is denoted as a [mm], a minimum length in the first direction of the end regions is denoted as c [mm], a modulus of longitudinal elasticity of the cover member is denoted as E [GPa], and a thickness of the cover member is denoted as t [mm], the following expression is established: c ? 10 ? ( a 25 ) 4 ( t 0.3 ) 3 ? ( E 200 ) .

Abstract: Liquid ejection head includes a substrate, a piezoelectric element provided on the substrate, an ejection port forming member provided on the substrate carrying the piezoelectric element. The ejection port forming member has an ejection port and forms a pressure chamber with the substrate. A first thin film is arranged between the substrate and the piezoelectric element to produce a space between the substrate and the first thin film. A second thin film is arranged on the piezoelectric element. The first thin film is arranged so as not to contact the lateral (edge) surface of the piezoelectric element and has a higher rigidity than the second thin film.

Abstract: A liquid ejection head includes a substrate, a piezoelectric element above the substrate, an orifice forming member above the substrate on the piezoelectric-element-provided-side, in which the orifice forming member has an ejection orifice for ejecting liquid and defines a pressure chamber between the orifice forming member and the substrate, and the pressure chamber communicates with the ejection orifice and includes the piezoelectric element therein, a first thin film provided between the substrate and piezoelectric element and defining a space between the first film and the substrate, and a second thin film on the piezoelectric element on the side opposite to the first film side and differing from the first film in rigidity. A communicating port is formed in the substrate in a region facing the space, communicates with the space through an opening having a smaller area than the area of the region, and is closed at an end.

Abstract: A cover member includes two end regions located at two ends in a first direction, and two beam portions which extend in the first direction and connect the two end regions together and which, together with the two end regions, form a single opening that exposes a plurality of discharge ports. When a width of the opening is denoted as a [mm], a minimum length in the first direction of the end regions is denoted as c [mm], a modulus of longitudinal elasticity of the cover member is denoted as E [GPa], and a thickness of the cover member is denoted as t [mm], the following expression is established. c ? 10 ? ( a 25 ) 4 ( t 0.

Abstract: Provided is a method of manufacturing an element substrate, including: forming first and second resists on a predetermined surface of a substrate so that part of the predetermined surface is exposed; etching the substrate with the first and second resists being used as a mask to form a first recess in the substrate; removing the second resist to expose a portion of the substrate that is different from the first recess; etching the substrate with the first resist being used as a mask to deepen the first recess and to form a second recess communicating with the first recess in the substrate; and covering openings of the first and second recesses with an orifice forming member to form a pressure chamber by the first recess and an orifice forming member and to form a flow reducing portion by the second recess and the orifice forming member.

Abstract: A liquid ejection head includes a plurality of liquid ejection units, each including a plate-like piezoelectric element, a first substrate and a second substrate laid one on the other in this order, the units being laid one on the other. The first substrate defines a plurality of pressure chambers for storing liquid, each of the pressure chambers communicating with an ejection port for ejecting liquid. At least either the first substrate or the second substrate defines a first liquid chamber, the first liquid chamber being either one of a feed chamber for feeding liquid to the pressure chambers and a recovery chamber for recovering liquid from the pressure chambers. The second substrate defines a second liquid chamber, the second liquid chamber being the other one of the feed chamber and the recovery chamber.

Abstract: A liquid discharge head including plural liquid discharge portions each including a discharge port for discharging liquid, plural discharge ports forming a discharge port array; a common liquid supply flow path extending adjacent to the discharge port array on one side of the discharge port array; and a common liquid collection flow path extending adjacent to the discharge port array on the other side of the discharge port array. Each liquid discharge portion includes a pressure chamber having the discharge port, and a piezoelectric element facing the discharge port. The pressure chamber includes an inlet and an outlet end portion respectively connected to the common liquid supply and collection flow paths, and has an elongated shape connecting the inlet and outlet end portions. A plurality of inlet and outlet end portions are respectively arranged along the common liquid supply flow path and the common liquid collection flow path.

Abstract: A liquid ejection head includes a plurality of liquid ejection units, each including a plate-like piezoelectric element, a first substrate and a second substrate laid one on the other in this order, the units being laid one on the other. The first substrate defines a plurality of pressure chambers for storing liquid, each of the pressure chambers communicating with an ejection port for ejecting liquid. At least either the first substrate or the second substrate defines a first liquid chamber, the first liquid chamber being either one of a feed chamber for feeding liquid to the pressure chambers and a recovery chamber for recovering liquid from the pressure chambers. The second substrate defines a second liquid chamber, the second liquid chamber being the other one of the feed chamber and the recovery chamber.