Abstract: In order to efficiently produce a liquid containing ultrafine bubbles of a desired gas, an ultrafine bubble-containing liquid producing apparatus includes a gas dissolving unit that dissolves a predetermined gas into a liquid, and a UFB generating unit that generates ultrafine bubbles in the liquid in which the predetermined gas is dissolved. A CPU performs control under a first condition in a case of causing the gas dissolving unit to operate in a circulation route passing through the dissolving unit. The CPU performs control under a second condition different from the first condition in a case of causing the UFB generating unit to operate in a circulation route passing through the UFB generating unit.

Abstract: Provided is an ultra-fine bubble-containing liquid manufacturing apparatus that can suppress viable cell contamination inside a UFB generating unit. To this end, it is provided with an ultra-fine bubble generating unit that generates an ultra-fine bubble by making film boiling by a heating unit in a liquid in which a gas is dissolved, and a radiating unit that is capable of irradiating a wetted portion of the ultra-fine bubble generating unit with ultraviolet rays.

Abstract: An ultra-fine bubble-containing liquid generating apparatus (UFB-containing liquid generating apparatus) includes a dissolving unit that generates a gas dissolving liquid and an ultra-fine bubble generating unit that generates ultra-fine bubbles in the gas dissolving liquid. Additionally, the UFB-containing liquid generating apparatus includes a temperature controlling unit that controls at least one of temperatures of the dissolving unit and the ultra-fine bubble generating unit such that the temperature of the ultra-fine bubble generating unit is equal to or lower than the temperature of the dissolving unit.

Abstract: A manufacturing apparatus for a solidified matter of an ultra-fine bubble (UFB)-containing liquid includes: a UFB generating unit that generates the UFB-containing liquid; and a cooling unit that generates the solidified matter of the UFB-containing liquid by cooling the UFB-containing liquid. The cooling unit cools the ultra-fine bubble-containing liquid such that a first solidified portion and a second solidified portion at a lower ultra-fine bubble concentration than that of the first solidified portion are formed in the solidified matter.

Abstract: An object of the present disclosure is to provide a manufacturing apparatus of an ultra fine bubble-contained liquid that can be utilized effectively because high concentration ultra fine bubbles are maintained for a long time at the time of manufacturing of the ultra fine bubble-contained liquid. One embodiment of the present invention is a manufacturing apparatus of an ultra fine bubble-contained liquid, which includes: a container having a gas supply port through which gas is introduced and a liquid supply port through which a liquid is introduced; and a generation unit inside the container, which is configured to cause an ultra fine bubble to occur in the liquid in which the gas is dissolved.

Abstract: An element substrate is bonded to a support substrate with high positional accuracy. A manufacturing method of the liquid ejecting head includes curing a first adhesive, which is in contact with an element substrate and a support substrate, at a first temperature to perform first temporary fixing, heating a second adhesive, which is in contact with the element substrate and the support substrate, to a second temperature higher than the first temperature so as to cure the second adhesive and perform second temporary fixing and heating a third adhesive, which is in contact with the element substrate and the support substrate, to a third temperature higher than the second temperature so as to cure the third adhesive and bond the element substrate to the support substrate. An elastic modulus of the second adhesive is larger than an elastic modulus of the first adhesive at the second temperature.

Abstract: In order to efficiently produce a liquid containing ultrafine bubbles of a desired gas, an ultrafine bubble-containing liquid producing apparatus includes a gas dissolving unit that dissolves a predetermined gas into a liquid, and a UFB generating unit that generates ultrafine bubbles in the liquid in which the predetermined gas is dissolved. A CPU performs control under a first condition in a case of causing the gas dissolving unit to operate in a circulation route passing through the dissolving unit. The CPU performs control under a second condition different from the first condition in a case of causing the UFB generating unit to operate in a circulation route passing through the UFB generating unit.

Abstract: A liquid ejection head includes a laminated body including a first plate having a plurality of ejection nozzles for ejecting a liquid and made from a resin material and a second plate having a plurality of through-holes communicating with the corresponding ejection nozzles and made from a metal material. The laminated body has a plurality of projection parts formed along the array direction Y of the ejection nozzles and having a curved dome shape projecting in the direction from the second plate to the first plate. The second plate has a plurality of through-slits formed adjacent to the projection parts.

Abstract: An element substrate is bonded to a support substrate with high positional accuracy. A manufacturing method of the liquid ejecting head includes curing a first adhesive, which is in contact with an element substrate and a support substrate, at a first temperature to perform first temporary fixing, heating a second adhesive, which is in contact with the element substrate and the support substrate, to a second temperature higher than the first temperature so as to cure the second adhesive and perform second temporary fixing and heating a third adhesive, which is in contact with the element substrate and the support substrate, to a third temperature higher than the second temperature so as to cure the third adhesive and bond the element substrate to the support substrate. An elastic modulus of the second adhesive is larger than an elastic modulus of the first adhesive at the second temperature.

Abstract: A liquid ejection head includes a laminated body including a first plate having a plurality of ejection nozzles for ejecting a liquid and made from a resin material and a second plate having a plurality of through-holes communicating with the corresponding ejection nozzles and made from a metal material. The laminated body has a plurality of projection parts formed along the array direction Y of the ejection nozzles and having a curved dome shape projecting in the direction from the second plate to the first plate. The second plate has a plurality of through-slits formed adjacent to the projection parts.

Abstract: A liquid ejection head includes a laminated body including a first plate having a plurality of ejection nozzles for ejecting a liquid and made from a resin material and a second plate having a plurality of through-holes communicating with the corresponding ejection nozzles and made from a metal material. The laminated body has a plurality of projection parts formed along the array direction Y of the ejection nozzles and having a curved dome shape projecting in the direction from the second plate to the first plate. The second plate has a plurality of through-slits formed adjacent to the projection parts.

Abstract: A flow path unit is formed by laminating a plurality of lamination plates, and has a first damper chamber extending in a manner overlapping with a plurality of pressure chambers with respect to a longitudinal direction in which the plurality of pressure chambers is aligned, as seen from an opening side of a plurality of nozzles. The first damper chamber is provided at a height between the pressure chamber and the common liquid chamber, as measured along the laminating direction in which the plurality of lamination plates is laminated, and a first support part is provided inside the first damper chamber.

Abstract: A liquid ejection head includes a plurality of ejection ports, a plurality of pressure chambers each communicating with each of the ejection ports, a piezoelectric actuator constituting part of walls of the pressure chambers, and a common liquid chamber containing liquid to be supplied to the pressure chambers. The pressure chambers and the common liquid chamber are opposed with an opposing wall interposed therebetween. The opposing wall faces the wall of the pressure chambers constituted by the piezoelectric actuator. A reinforcing portion that supports the opposing wall is provided in the common liquid chamber.

Abstract: An element substrate in which a plurality of members are layered. Plates and a substrate serving as the plurality of members being layered and adhered to each other. The element substrate including a plurality of ejection ports that eject a liquid, and a plurality of supply ports that each communicate with a different ejection port. At least one of the members includes a groove that is, when viewing, from above, a surface in which the ejection ports are formed, formed between two ejection ports, each of which communicates to a different supply port.

Abstract: A flow path unit is formed by laminating a plurality of lamination plates, and has a first damper chamber extending in a manner overlapping with a plurality of pressure chambers with a longitudinal direction in which the plurality of pressure chambers is aligned, seen from an opening side of a plurality of nozzles. The first damper chamber is provided at a height between the pressure chamber and the common liquid chamber, in a height along the laminating direction in which the plurality of lamination plates is laminated, and a first support part is provided inside the first damper chamber.

Abstract: A liquid ejection head includes a laminated body including a first plate having a plurality of ejection nozzles for ejecting a liquid and made from a resin material and a second plate having a plurality of through-holes communicating with the corresponding ejection nozzles and made from a metal material. The laminated body has a plurality of projection parts formed along the array direction Y of the ejection nozzles and having a curved dome shape projecting in the direction from the second plate to the first plate. The second plate has a plurality of through-slits formed adjacent to the projection parts.

Abstract: A liquid ejection head includes a plurality of ejection ports, a plurality of pressure chambers each communicating with each of the ejection ports, a piezoelectric actuator constituting part of walls of the pressure chambers, and a common liquid chamber containing liquid to be supplied to the pressure chambers. The pressure chambers and the common liquid chamber are opposed with an opposing wall interposed therebetween. The opposing wall faces the wall of the pressure chambers constituted by the piezoelectric actuator A reinforcing portion that supports the opposing wall is provided in the common liquid chamber.

Abstract: An element substrate in which a plurality of members are layered. Plates and a substrate serving as the plurality of members being layered and adhered to each other. The element substrate including a plurality of ejection ports that eject a liquid, and a plurality of supply ports that each communicate with a different ejection port. At least one of the members includes a groove that is, when viewing, from above, a surface in which the ejection ports are formed, formed between two ejection ports, each of which communicates to a different supply port.

Abstract: A method of manufacturing a substrate of a liquid ejection head including: forming a plurality of recesses in a silicon wafer; etching the silicon wafer with etchant to form a depression and a plurality of through holes formed from the plurality of the recesses in the depression; and manufacturing a plurality of substrates of the liquid ejection head from the silicon wafer by dividing the silicon wafer on the basis of through holes.

Abstract: Precise positioning of a film used to seal an electrical connection on a liquid ejecting head is made possible. Specifically, positioning is conducted in a state in which part of the film is held to a finger by suction. Next, the finger is moved downward while in the positioned state, and part of the film is pressed against a wiring board. With part of the film fixed to the wiring board in this way, a sealing resin flows while being covered by the film. Consequently, shifting of the position of the film as the sealing resin flows may be prevented. As a result, it becomes possible to conduct covering with the film in a precisely positioned state.