Abstract: A process includes preparing a base material having a first surface provided with an element generating energy that is used for discharging a liquid and an electrode layer that is connected to the element; forming a hollow on a second surface, which is the surface on the opposite side of the first surface, of the base material, wherein part of the electrode layer serves as the bottom face of the hollow; covering the surface of the base material and the bottom face forming the inner face of the hollow with an insulating film; and partially exposing the electrode layer by removing part of the insulating film covering the bottom face using laser light.

Abstract: A process includes preparing a base material having a first surface provided with an element generating energy that is used for discharging a liquid and an electrode layer that is connected to the element; forming a hollow on a second surface, which is the surface on the opposite side of the first surface, of the base material, wherein part of the electrode layer serves as the bottom face of the hollow; covering the surface of the base material and the bottom face forming the inner face of the hollow with an insulating film; and partially exposing the electrode layer by removing part of the insulating film covering the bottom face using laser light.

Abstract: A liquid discharge head substrate includes an electrode layer, which is electrically connected to an element that generates energy used for discharging a liquid and provided in an inner side of a region between a first face and a third face of a substrate, and a member made of resin which covers the electrode is provided in the region.

Abstract: An inkjet head includes a recording element substrate for discharging ink, a supply port penetrating the recording element substrate and serving as an ink flow path, a protrusion formed at a position surrounding the supply port, projecting from one surface of the recording element substrate, and having a first metal layer at a distal end, and a supporting member having a second metal layer welded with the first metal layer and supporting the recording element substrate.

Abstract: The present invention prevents an element substrate from not operating normally in the case where the voltage supply from a power supply that applies a voltage to a logic circuit is unstable. The element substrate of the invention has unit for applying a first voltage to the logic circuit, and unit capable of applying a second voltage that is lower than the first voltage and capable of operating the logic circuit.

Abstract: This invention is directed to a print element substrate including a plurality of print element arrays in which different numbers of print elements are arranged. The print element substrate can efficiently transfer data to each print element and efficiently lay out circuits. The print element substrate includes the following arrangement. More specifically, a first print element array having a relatively large number of print elements, and a plurality of second print element arrays which are equal in length to the first print element array and smaller in the number of print elements than the first print element array are juxtaposed. The print element substrate includes one shift register which holds data for driving the print elements of the first print element array, and one shift register which holds data for driving the print elements of the second print element arrays.

Abstract: A liquid discharge head includes, a substrate, a flow path wall member provided with a wall of a liquid flow path connected to a discharge port for discharging liquid, the flow path being formed by the flow path wall member and one surface of the substrate which are in contact with each other, and a coated resin member made of a cured material of a resin composition provided to cover end surfaces of the substrate, wherein a liquid repellent member having a contact angle of the resin composition larger than that of both the flow path wall member and the one surface is provided to cover at least a part of an intersection line between an outer lateral surface of the flow path wall member and the one surface.

Abstract: This invention relates to a printhead element substrate having a plurality of electrothermal transducers and a plurality of switching elements which drive the plurality of electrothermal transducers. The element substrate has a level converter which is shared by adjacent electrothermal transducers and steps up an input driving signal, and a switch circuit which supplies the driving signal output from the level converter to one of the adjacent electrothermal transducers. The switch circuit switches the supply destination of the driving signal in accordance with an external input selection signal.

Abstract: An element substrate capable of obtaining a high-quality printed image for a long period. The element substrate has a plurality of heaters, driving elements each of which is provided in correspondence with each of the plurality of heaters to selectively drive the plurality of heaters, an input terminal to receive a driving mode selection signal, and a block selection circuit which time-divisionally drives, in blocks of different timings, heaters in each of a plurality of groups each including a predetermined number of heaters and driving elements. The element substrate includes a logic circuit which time-divisionally drives the heaters in the group when the selection signal input from the input terminal is a signal for selecting a first driving mode, and simultaneously drives all heaters in the group when the selection signal is a signal for selecting a second driving mode.

Abstract: Provided is a method for manufacturing an ejection element substrate which is provided with a flow-channel-forming member having an ejection orifice for ejecting a liquid and a liquid flow channel that is communicated with the ejection orifice, and a substrate having a supply port for supplying the liquid to the liquid flow channel, and further a filter structure formed in the bottom of the supply port, including: forming the supply port by forming a through-hole by etching the substrate from a second face of the substrate on the side opposite to a first face of the substrate, on which the flow-channel-forming member is disposed; providing a resinous protection film on the side face and the bottom of the supply port; and forming a minute opening in the resinous protection film in the bottom of the supply port by carrying out a laser processing from the side of the second face.

Abstract: This invention is directed to an element substrate including a plurality of print element arrays in which print elements are arranged at different arrayed densities. The element substrate can efficiently transfer data to each print element. The element substrate includes the following arrangement. More specifically, the first print element array having a relatively large number of print elements, and the second print element array which is equal in length to the first print element array and has a relatively small number of print elements are juxtaposed. The element substrate includes one shift register which holds data for driving the print element of the second print element array, and a plurality of shift registers for dividing and holding data for driving the print elements of the first print element array.

Abstract: A liquid ejecting head includes a coating resin layer including a plurality of ejection outlets for ejecting liquid and flow paths which are in fluid communication with the ejection outlets, respectively; a substrate having energy generating elements for generating energy for ejecting liquid; and an adhesion improving layer provided between the coating resin layer and the substrate. The coating resin layer further includes a first resin material layer closest to the substrate and at least one second resin material layer, and the first resin material layer provides at least one stepped portion continuing from a periphery of the second resin material layer.

Abstract: An element substrate capable of independently confirming an electrical connection status with a logic power source without increasing costs due to increasing the number of terminals or the like. The element substrate includes a connection status output circuit that outputs a signal in response to a connection status of a logic power source input terminal, or a connection status of input terminals of each of a print signal, a clock signal, a drive signal, and a latch signal, and a connection status output terminal that outputs an output signal from the connection status output circuit.

Abstract: This invention is directed to allow efficiently transferring data to each print element (heater) and efficiently laying out circuits in an element substrate including plural heater arrays in which different numbers of heaters are arranged. This substrate includes: a first array having a relatively large number of heaters; and a second array which is equal in length to the first array and has a relatively small number of heaters. These arrays are juxtaposed. The substrate further includes plural shift registers equal in number to the heater arrays of the substrate. The shift registers include a shift register which holds some data for driving the heaters of the first heater array, and data for driving the heaters of the second heater array. The shift registers further include a shift register which holds data other than some data for driving the heaters of the first heater array.

Abstract: An ink jet recording element substrate includes a substrate; an ejection outlet array for ejecting ink; a heat generating element array comprising a plurality of heat generating elements for generating ejection energy for ejecting the ink from the ejection outlet array; a protecting film, comprising protecting portions, for protecting the heat generating element array; a common line, disposed along a side of the heat generating element array, for supplying electric power for driving the heat generating elements, and being divided into at least two portions by a line perpendicular to the heat generating element array; a testing electrode for testing a function of the protecting film; and an externally connecting electrode, disposed at an end of the substrate, for externally supplying electric power to the common line; wherein the ink jet recording element substrate further includes, in an area between the portions of the common line, a connecting line for electrically connecting the protecting portions of the

Abstract: This invention relates to an element substrate capable of confirming an electrical connection status before a printhead malfunctions. The element substrate is a substrate for a printhead, which is detachable from a printing apparatus and includes a plurality of printing elements, a logical circuit for controlling the printing elements, and a voltage application terminal for applying a driving voltage to drive the printing elements. The logical circuit is driven at a voltage lower than the driving voltage. The element substrate includes a connection status output circuit which outputs a signal reflecting the electrical connection status between the printhead and the printing apparatus on the basis of the driving voltage.

Abstract: An element substrate capable of independently confirming an electrical connection status with a logic power source without increasing costs due to increasing the number of terminals or the like. The element substrate includes a connection status output circuit that outputs a signal in response to a connection status of a logic power source input terminal, or a connection status of input terminals of each of a print signal, a clock signal, a drive signal, and a latch signal, and a connection status output terminal that outputs an output signal from the connection status output circuit.

Abstract: An ink jet recording head substrate is provided with: an array of a plurality of energy generating bodies for generating energy utilized to discharge ink; and an ink supply port arranged along the array to supply ink to the plurality of energy generating bodies, the array and the ink supply port each extending in a longitudinal direction of the ink jet recording head substrate, the ink jet recording head substrate comprising: a first terminal electrically connected with the plurality of energy generating bodies, the first terminal being arranged along beside a first side of the ink jet recording head substrate, the first side extending in a cross direction intersecting the longitudinal direction; and a second terminal electrically connected with the plurality of energy generating bodies, the second terminal being arranged beside a second side of the ink jet recording head substrate, the second side extending in the longitudinal direction, so as to be arranged in an area between the first side and a phantom li

Abstract: A recording head includes outlets disposed in a staggered pattern so that the distances from an ink inlet to the outlets differ alternately for adjacent outlets. The recording head includes an outlet group including a plurality of the outlets on at least one side of the ink inlet. The outlet group includes first outlets and second outlets, wherein the distance from the ink inlet to the first outlets differs from the distance from the ink inlet to the second outlets. First recording elements and second recording elements including heat resistors are provided. The first recording elements and second recording elements correspond to the first outlets and the second outlets, respectively, and are disposed in first ink channels and second ink channels, respectively. The first recording elements are rectangular, whereas the second recording elements are substantially square.

Abstract: Plural electrothermal transducers (heaters) belonging to each of blocks having different driving timings are constituted as one group and are connected to a common interconnecting wiring in units of one group. Plural lines are connected to the common wiring such that the plural lines are extended to return with respect to the heaters and are each arranged to extend in an adjacent or sandwiched relation to the heaters. A printhead substrate, a printhead, and a printing apparatus can be provided which can realize higher quality of a printed image and a higher printing speed by arraying the heaters at a higher density while ensuring a sufficient area for arrangement of each of the heaters.