Abstract: A method of making a nozzle chip includes a step of reduction-projection-exposing a photosensitive resin material to exposure light through a mask by using a reduction-projection-exposure apparatus, the mask having a light-transmitting pattern formed thereon; and a step of forming an ejection orifice pattern corresponding to the light-transmitting pattern on the photosensitive resin material by performing a developing operation. The exposure light in the step of reduction-projection-exposing is passed through a correction mechanism before the exposure light reaches the photosensitive resin material, the correction mechanism being configured to suppress an inclination of a chief ray due to off-axis telecentricity that occurs in the reduction-projection-exposure apparatus.

Abstract: An object of the present invention is to provide a liquid ejection head capable of suppressing the capture of bubbles into the liquid ejection head including ejection ports having different opening areas so as to satisfactorily fill a liquid channel and the ejection ports with liquid. In order to achieve the object, the liquid ejection head according to the present invention includes a liquid supply port communicating with a plurality of kinds of ejection ports, and further, a defoaming opening communicating with another ejection port except an ejection port having a large opening area out of the plurality of kinds of ejection ports via a defoaming channel.

Abstract: A liquid ejection head is provided with a recording element substrate having a plurality of ejection orifices for ejecting a liquid, the plurality of ejection orifices being arranged to form a row of the ejection orifices. In at least some of the plurality of the ejection orifices, each having one side and another side, the area of an inner wall of the ejection orifices is set to be larger on the other side than on the one side, the one side and the other side being defined by a plane which passes through the center of the ejection orifice, intersects with the row of the ejection orifices at right angles and extends along the direction of the depth of the ejection orifice.

Abstract: Provided is a method of manufacturing a liquid ejection head, including: forming, on a substrate, a flow path mold pattern that becomes a mold of a liquid flow path; forming a negative photosensitive resin layer on the flow path mold pattern; subjecting the negative photosensitive resin layer to exposure processing with use of a reduction projection exposing apparatus and a mask pattern having an ejection orifice mask shape for forming ejection orifices; and subjecting the negative photosensitive resin layer obtained after the exposure processing to development processing to form the ejection orifices, in which the ejection orifices are formed by correcting, by the ejection orifice mask shape, an inclination of an ejection angle due to an off-axis telecentricity caused by the reduction projection exposing apparatus so as to be close to a direction perpendicular to a surface of the substrate.

Abstract: An object of the present invention is to provide a liquid ejection head capable of suppressing the capture of bubbles into the liquid ejection head including ejection ports having different opening areas so as to satisfactorily fill a liquid channel and the ejection ports with liquid. In order to achieve the object, the liquid ejection head according to the present invention includes a liquid supply port communicating with a plurality of kinds of ejection ports, and further, a defoaming opening communicating with another ejection port except an ejection port having a large opening area out of the plurality of kinds of ejection ports via a defoaming channel.

Abstract: A liquid ejection head is provided with a recording element substrate having a plurality of ejection orifices for ejecting a liquid, the plurality of ejection orifices being arranged to form a row of the ejection orifices. In at least some of the plurality of the ejection orifices, the area of an inner wall of the ejection orifices is set to be larger on the other side than on one side, the other side and the one side being defined by a plane which passes through the center of the ejection orifice, intersects with the row of the ejection orifices at right angles and extends along the direction of the depth of the ejection orifice.

Abstract: Provided is a method of manufacturing a liquid ejection head, including: forming, on a substrate, a flow path mold pattern that becomes a mold of a liquid flow path; forming a negative photosensitive resin layer on the flow path mold pattern; subjecting the negative photosensitive resin layer to exposure processing with use of a reduction projection exposing apparatus and a mask pattern having an ejection orifice mask shape for forming ejection orifices; and subjecting the negative photosensitive resin layer obtained after the exposure processing to development processing to form the ejection orifices, in which the ejection orifices are formed by correcting, by the ejection orifice mask shape, an inclination of an ejection angle due to an off-axis telecentricity caused by the reduction projection exposing apparatus so as to be close to a direction perpendicular to a surface of the substrate.

Abstract: A liquid ejecting head includes a substrate; and flow path forming members that form a plurality of liquid flow paths on or above the substrate, wherein grooves are formed between the plurality of liquid flow paths that adjoin in a longitudinal direction of the substrate, and the flow path forming members are formed on or above the substrate via an intermediate layer.

Abstract: A method of making a nozzle chip includes a step of reduction-projection-exposing a photosensitive resin material to exposure light through a mask by using a reduction-projection-exposure apparatus, the mask having a light-transmitting pattern formed thereon; and a step of forming an ejection orifice pattern corresponding to the light-transmitting pattern on the photosensitive resin material by performing a developing operation. The exposure light in the step of reduction-projection-exposing is passed through a correction mechanism before the exposure light reaches the photosensitive resin material, the correction mechanism being configured to suppress an inclination of a chief ray due to off-axis telecentricity that occurs in the reduction-projection-exposure apparatus.

Abstract: Provided is a method for manufacturing a liquid discharge head, the liquid discharge head includes a substrate provided on a surface with a first energy generating part and a second energy generating part for generating energy utilized for discharging a liquid; a first discharge port provided corresponding to the first energy generating part so as to face the surface; a second discharge port provided corresponding to the second energy generating part so as to face the surface; a first wall member which has a wall of a first liquid flow path which communicates with the first discharge port; and a second wall member which has a wall of a second liquid flow path which communicates the second discharge port, wherein a distance between the second energy generating part and the second discharge port is greater than a distance between the first energy generating part and the first discharge port.

Abstract: Provided is a process for producing a liquid ejection head including an ejection orifice member having a plurality of ejection orifices for ejecting liquid provided along an arrangement direction, the process including preparing a substrate provided with a resin layer which contains a photocurable resin; carrying out a first exposure treatment and a second exposure treatment which are each of an exposure treatment of subjecting the resin layer to exposure; and forming the ejection orifices of the resin layer subjected to the first exposure treatment and the second exposure treatment. An inclination angle of a side wall of the ejection orifices formed by the first exposure treatment with respect to the substrate differs from an inclination angle of a side wall of the ejection orifices formed by the second exposure treatment with respect to the substrate.

Abstract: An ink jet recording head capable of maintaining ink supply capability for a long period of time includes a substrate provided with a plurality of energy generating elements and an ink supply port, and a flow path member which has a plurality of discharge ports, a plurality of ink flow paths in communication with the plurality of discharge ports, and a common liquid chamber in communication with the plurality of ink flow paths. The common liquid chamber is divided into a discharge port area and a drainage port area, and the ink flows into the discharge port area through a filter. In the case where a smallest diameter among the diameters of the discharge ports and the diameters of the ink flow paths is denoted by A and a largest diameter of openings of the filter is denoted by B, A?B is satisfied.

Abstract: A liquid ejection head includes a member having ejection ports and dummy ejection ports. The ejection ports are provided in correspondence with energy-generating elements used in ejecting liquid. The dummy ejection ports are provided in correspondence with a light-receiving element outputting current whose level changes in accordance with the intensity of light applied thereto. By detecting the level of current that is output from the light-receiving element, the shapes of the ejection ports are estimated.

Abstract: A printing apparatus includes multiple image printers (700) that respectively print an image on a front surface of a paper, a back surface printer that prints given information on the back surface of a paper printed with an image by the image printer (700), a sorter (104) that sorts papers printed with given information on the back surfaces by the back surface printer, a first conveyance path that conveys a paper printed with an image on the front surface by the image printer (700) to the back surface printer, and a second conveyance path that conveys a paper printed with given information on the back surface by the back surface printer to the sorter (104). The back surface printer, the sorter (104), and the second conveyance path are integrated into an upper casing (101).

Abstract: An ink jet recording head includes a coating resin layer including a plurality of ejection outlets for ejecting ink and a plurality of ink flow passages communicating with the plurality of ejection outlets; a substrate provided with an energy generating element for generating energy for ejecting the ink; and an adhesiveness-improving layer, provided between the coating resin layer and the substrate, for improving adhesiveness between the coating resin layer and the substrate. The adhesiveness-improving layer has a thickness so as to be larger at an end portion of the substrate than that at a portion other than the end portion.

Abstract: The present invention provides a method for producing a liquid discharge head including a silicon substrate having, on a first surface, energy generating elements, and a supply port penetrating the substrate from the first surface to a second surface, which is a rear surface of the first surface of the substrate. The method includes the steps of: preparing the silicon substrate having a sacrifice layer at a portion on the first surface where the ink supply port is to be formed and an etching mask layer having a plurality of openings on the second surface, the volume of a portion of the sacrifice layer at a position corresponding to a portion between two adjacent said openings being smaller than the volume of a portion of the sacrifice layer at a position corresponding to the opening; etching the silicon substrate from the plurality of openings and etching the sacrifice layer.

Abstract: Provided is a process for producing a liquid ejection head including an ejection orifice member having a plurality of ejection orifices for ejecting liquid provided along an arrangement direction, the process including preparing a substrate provided with a resin layer which contains a photocurable resin;carrying out a first exposure treatment and a second exposure treatment which are each of an exposure treatment of subjecting the resin layer to exposure; and forming the ejection orifices of the resin layer subjected to the first exposure treatment and the second exposure treatment. An inclination angle of a side wall of the ejection orifices formed by the first exposure treatment with respect to the substrate differs from an inclination angle of a side wall of the ejection orifices formed by the second exposure treatment with respect to the substrate.

Abstract: When forming an image by developing a color development layer that reacts to a light, the image formation processes (color development, color erasure, and/or fixing) that can be performed simultaneously with information recording are performed in the same period as that of the information recording to reduce the time required for image formation. An image formation device that forms an image by developing a color development layer reacting to a light comprises a color development unit that develops colors by focusing a light on the color development layer, color erasure units that selectively erase the developed colors by focusing a light on the developed color development layer, and a fixing unit that fixes an image formed by the color erasure wherein the color development unit and/or the fixing unit performs processing in a period in which information is recorded on the recording medium on which the color development layer is provided.

Abstract: A liquid ejection head including a flow path forming member which forms an ejection orifice which is opened on a front surface and which ejects a liquid, and a liquid flow path which continues to the ejection orifice; and a substrate including a liquid chamber which is opened on a back surface on an opposite side of the front surface and which includes a first slope which becomes narrower from a back surface side toward a front surface side, a liquid pathway which is opened in the first slope and connects the liquid flow path and the liquid chamber, and a first hollow portion which is provided in a bottom portion of the liquid chamber.

Abstract: An ink jet recording head capable of maintaining ink supply capability for a long period of time, including a substrate provided with a plurality of energy generating elements and an ink supply port, and a flow path member which has a plurality of discharge ports, a plurality of ink flow paths in communication with the plurality of discharge ports, and a common liquid chamber in communication with the plurality of ink flow paths, in which the common liquid chamber is divided into a discharge port area and a drainage port area, the ink flows into the discharge port area through a filter, and in the case where a smallest diameter among the diameters of the discharge ports and the diameters of the ink flow paths is denoted by A and a largest diameter of openings of the filter is denoted by B, A?B is satisfied.