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: An element substrate has a plurality of printing elements, and a block selection unit which divides the plurality of printing elements into a plurality of blocks and time-divisionally drives the blocks. The element substrate includes a plurality of input terminals which divide the plurality of printing elements included in each block into a plurality of groups and supply a driving voltage to the printing elements belonging to each group, a delay circuit which externally receives an enable signal for enabling energization to the printing elements and generates a plurality of delayed enable signals having different delay times with respect to the enable signal, and a wiring which supplies the enable signal and the plurality of delayed enable signals output from the delay circuit to different groups in the order of the different delay times.

Abstract: A small-size element substrate with high electrical efficiency can be achieved when a plurality of printing element arrays having the same discharge amount exist on a single element substrate, and transistors which form driver arrays corresponding to the respective printing element arrays are formed at different array densities including transistors which form a driver array corresponding to a printing element array having a different discharge amount. The area of each transistor of the first driver array corresponding to the first printing element array is set larger than that of each transistor of the second driver array corresponding to the second printing element array. The wiring width of the first power supply wiring pattern corresponding to the first printing element array in a direction perpendicular to the printing element array is set smaller than that of the second power supply wiring pattern corresponding to the second printing element array.

Abstract: An inkjet printhead board and inkjet printhead is provided having a reliable storage element which allows for print without causing damages to an interlayer insulation film and protection film upon printing data unique to the printhead and is free from the restriction in arrangement position. For this purpose, a printing device board uses therein an information storage element formed common in material and process to electro-thermal converter element, the resistance value of which is changed to enable information storage so that information can be read out of the information storage element.

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 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: 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: 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 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 has a plurality of printing elements, and a block selection unit which divides the plurality of printing elements into a plurality of blocks and time-divisionally drives the blocks. The element substrate includes a plurality of input terminals which divide the plurality of printing elements included in each block into a plurality of groups and supply a driving voltage to the printing elements belonging to each group, a delay circuit which externally receives an enable signal for enabling energization to the printing elements and generates a plurality of delayed enable signals having different delay times with respect to the enable signal, and a wiring which supplies the enable signal and the plurality of delayed enable signals output from the delay circuit to different groups in the order of the different delay times.

Abstract: Provided is a configuration for connecting common wires (a common power supply wire for connecting a plurality of printing elements commonly to a power supply and a common ground wire for connecting the plurality of printing elements commonly to a ground) to the outside, which configuration does not obstruct a constitution for reducing resistances of the common wires. For this purpose, the common wires are directly connected respectively to electrode leads of an electric wiring tape for external connection without use of electrode pads. In the case of this configuration, the widths of the common wires need not be narrower in vicinities of the electrode pads which would otherwise be in an edge of the board, and accordingly reduction of resistances of the common wires is not obstructed.

Abstract: An element substrate includes a plurality of printing elements, a plurality of driving circuits which drive the plurality of printing elements, an input unit which inputs an enable signal to define the driving period of each printing element, a shift register which inputs a print data, a latch circuit which stores, in accordance with an externally input latch signal, the print data output from the shift register and outputs a print data signal, a time-divisional selection circuit which generates a block selection signal to divide the plurality of printing elements into a plurality of blocks and time-divisionally drive the printing elements, and a delay unit which changes the drive timing between the printing elements in a single block. The delay unit delays the enable signal and the print data signal.

Abstract: An element substrate has a plurality of printing elements, and a block selection unit which divides the plurality of printing elements into a plurality of blocks and time-divisionally drives the blocks. The element substrate includes a plurality of input terminals which divide the plurality of printing elements included in each block into a plurality of groups and supply a driving voltage to the printing elements belonging to each group, a delay circuit which externally receives an enable signal for enabling energization to the printing elements and generates a plurality of delayed enable signals having different delay times with respect to the enable signal, and a wiring which supplies the enable signal and the plurality of delayed enable signals output from the delay circuit to different groups in the order of the different delay times.

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: 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: A liquid discharge recording head includes a substrate having a liquid supply opening facilitating supplying liquid and heating resistors for generating energy for discharging the liquid, a flow path member having discharge openings and flow paths including first and second flow paths that are adjacent each other, the second flow path being longer than the first flow path, and a first resister corresponding to the first flow path and a second resistor corresponding to the second flow path, each of the first and second resistors being disposed at an area of the flow path member which is situated in correspondence with the liquid supply opening, wherein an amount of protrusion of the first resister at a side of the first flow path is greater than an amount of protrusion of the second resister at a side of the second flow path.

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: In a substrate for an ink jet head used for an ink jet head recording apparatus, electrostatic breakdown of a diode sensor functional as a substrate temperature sensing element is prevented. A protective element is electrically connected between a diode sensor and an input/output pad for the diode sensor.

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: 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.