Abstract: An inkjet print head for which an ink flow path formation member, arranged on a printing element board, is prevented from being peeled off or being damaged, and the printing element board in an appropriate state can be mounted on a support member. According to the present invention, an ink flow path formation member is arranged on one face of a printing element board, and a peripheral area extending outward from the ink flow path formation member is prepared. Since pressure is applied to the peripheral area using a mounting tool, to bond the first terminals of the printing element board to the electrode terminals of the support member, damage to the ink flow path formation member, caused by the mounting tool, can be prevented.

Abstract: A liquid discharge head includes a discharge element including a discharge port, a liquid supply port, an electric connection terminal, and a heat transfer terminal. The discharge head also includes a supporting member including an electric connection terminal portion formed on a first surface thereof and electrically connected to the electric connection terminal, a heat transfer terminal junction portion formed on the first surface and connected to the heat transfer terminal, a plurality of through-holes extending between the first surface and a second surface of the supporting member, a partition wall portion separating the through-holes from each other, and a heat transfer path connected to the heat transfer terminal junction portion. An interval between the through-holes increases according to a direction from the first surface to the second surface. A volume of the heat transfer path increases according to the increase of the interval.

Abstract: An ink jet recording head includes a supporting member, a plurality of recording element substrates secured to the supporting member while being arranged along a lengthwise direction of the supporting member and including a discharge port configured to discharge a droplet and an electrode formed at an end in the lengthwise direction and receives an electric signal that controls the discharge of the droplet from the discharge port, an electric wiring member secured to the supporting member and including a plurality of device holes configured to individually expose the plurality of recording element substrates and an electrode terminal formed in the periphery of the plurality of device holes in the lengthwise direction to transmit the electric signal to the electrode, and a wire configured to connect the electrode and the electrode terminal, and the electric wiring member is at least discontinued between the adjacent device holes in the lengthwise direction.

Abstract: An ink jet print head is provided which allows an ejection opening-formed surface to be cleaned well and can improve a precision with which ejected ink lands on a print medium. For this purpose, conductive layers of a conductive material are formed on the support substrate and planarized. The liquid ejection substrates are mounted on the support substrate with high precision, without a sealing agent, that protects electrical connecting portions on the liquid ejection substrates, protruding from the ejection opening-formed surface.

Abstract: A highly reliable, small-sized, and inexpensive ink jet recording head includes an electrical wiring member that is joined with a back surface of a liquid discharge substrate and includes a liquid supply port communicating with a liquid supply port of the liquid discharge substrate and an electrical connection portion connected to the electrode; and a holding member that holds the liquid discharge substrate through the electrical wiring member and includes a liquid supply port for supplying the liquid to the liquid supply port of the liquid discharge substrate. The liquid supply ports of the electrical wiring member, the liquid discharge substrate, and the holding member communicate with one another. A sealing agent for sealing the electrical connection portion is filled up between the liquid discharge substrate and the electrical wiring member, and a side surface of the liquid supply port of the electrical wiring member is covered with the sealing agent.

Abstract: An ink jet recording head includes a recording element substrate having an array of discharge ports and a side surface extending along an array direction of the discharge ports, and an opposite surface facing the side surface. A minimum distance is provided between the opposite surface and the side surface at least at a center portion of the side surface. Also, a distance greater than the minimum distance is provided between the opposite surface and the side surface at an end portion of the side surface in the array direction.

Abstract: A highly reliable, compact, and inexpensive ink jet recording head, includes a liquid discharge substrate having on a front surface side a discharge port for discharging a liquid, and having, on a back surface side, a liquid supply port for supplying the liquid to be discharged from the discharge port, and an electrode for transmitting and receiving a signal to drive energy generation means for discharging the liquid from the discharge port; a film-like electrical wiring member joined to the back surface of the liquid discharge substrate, the film-like electrical wiring member including a liquid supply hole communicating with the liquid supply port of the liquid discharge substrate, and an electrical connection portion connected to the electrode; and a retaining member for retaining the liquid discharge substrate with the electrical wiring member interposed therebetween, the retaining member including a liquid supply port for supplying the liquid to the liquid supply port of the liquid discharge substrate.

Abstract: A liquid discharge substrate includes a first substrate having an element, on a first surface, that generates energy for discharging liquid; a plurality of first electrodes electrically connected to the element and passing from the first surface to a second surface of the first substrate opposite to the first surface; a second substrate that is in contact with the second surface to support the first substrate; and second electrodes provided between the first substrate and the second substrate and electrically connected to the plurality of first electrodes.

Abstract: In order to dissipate to a high degree of efficiency the heat of a liquid discharge substrate of an ink jet recording head and effectively suppress increases in the substrate temperature, in an ink jet recording head in which a liquid discharge substrate is mounted on a supporting member through a foil-shaped heat dissipation member, the area of the heat dissipation member is greater than the projected area of the liquid discharge substrate with respect to the supporting member.

Abstract: The invention provides an ink jet recording head, in which, for improving heat-dissipating property and electrode terminal connectivity and reducing production cost, second electrode terminals provided on a supporting surface of plural laminated sheets for supporting a liquid discharge substrate and to be connected with first electrode terminals of the liquid discharge substrate are provided outside an ink supply aperture formed in an outermost sheet constituting the supporting surface, and are supported by the outermost sheet and at least a sheet laminated thereunder.

Abstract: A liquid ejection head is constituted by a liquid ejection substrate comprising a liquid supply port for supplying liquid, an ejection outlet for ejecting the liquid supplied from the liquid supply port, and ejection energy generating devices for generating energy for ejecting the liquid; and a supporting member having a supporting surface for supporting the liquid ejection substrate and a liquid supply hole for supplying liquid to the liquid ejection substrate, the liquid supply hole communicating with the liquid supply port of the liquid ejection substrate to form a communicating portion, a periphery of which is sealed by a sealant. The liquid supply hole of the supporting member has an opening larger than that of the liquid supply port of the liquid ejection substrate. The support member has an inner wall portion including an edge line portion defined by the liquid supply hole on a side where the liquid ejection substrate is to be disposed. The inner wall portion is covered with the sealant.

Abstract: An inkjet print head for which an ink flow path formation member, arranged on a printing element board, is prevented from being peeled off or being damaged, and the printing element board in an appropriate state can be mounted on a support member. According to the present invention, an ink flow path formation member is arranged on one face of a printing element board, and a peripheral area extending outward from the ink flow path formation member is prepared. Since pressure is applied to the peripheral area using a mounting tool, to bond the first terminals of the printing element board to the electrode terminals of the support member, damage to the ink flow path formation member, caused by the mounting tool, can be prevented.

Abstract: A printing head is provided in which a distance between an ejection port face of the printing head and a print medium is reduced to improve an ink ejection accuracy during a printing operation. The printing head of the present invention is a back shooting-type printing head. The heater and an electrode connected thereto are formed at the back face of the substrate. The electrode and an in-support-base wiring for supplying electricity to the heater via the electrode are connected to each other at the back face side of the substrate. The substrate and the support base have therebetween a liquid chamber wall member including therein a space. The substrate, the support base, and the liquid chamber wall member constitute a liquid chamber that communicates with the ejection port and that stores ink supplied to the ejection port.

Abstract: An ink jet print head is provided which allows an ejection opening-formed surface to be cleaned well and can improve a precision with which ejected ink lands on a print medium. For this purpose, conductive layers of a conductive material are formed on the support substrate and planarized. The liquid ejection substrates are mounted on the support substrate with high precision, without a sealing agent, that protects electrical connecting portions on the liquid ejection substrates, protruding from the ejection opening-formed surface.

Abstract: A liquid discharge head includes a discharge element including a discharge port, a liquid supply port, an electric connection terminal, and a heat transfer terminal. The discharge head also includes a supporting member including an electric connection terminal portion formed on a first surface thereof and electrically connected to the electric connection terminal, a heat transfer terminal junction portion formed on the first surface and connected to the heat transfer terminal, a plurality of through-holes extending between the first surface and a second surface of the supporting member, a partition wall portion separating the through-holes from each other, and a heat transfer path connected to the heat transfer terminal junction portion. An interval between the through-holes increases according to a direction from the first surface to the second surface. A volume of the heat transfer path increases according to the increase of the interval.

Abstract: Liquid ejection chips 101, each having a ejection port 103, a supply port 104 communicating with the ejection port 103 by way of a flow channel 108 and a heater arranged in the flow channel 108, are bonded to a single chip plate 102 to form a two-dimensional array. As a result, a liquid ejection unit having a plurality of ejection ports 103 and a plurality of supply ports 104 is formed. As the heaters are driven while probe solutions are supplied to the respective supply ports 104, the probe solutions are ejected from the ejection ports 103 to the outside under the pressure of bubbles. The probe solutions of mutually different types are ejected respectively from the ejection ports 103 and made to adhere to a solid-phase substrate. Thus, a desired probe array can be manufactured.

Abstract: In order to dissipate to a high degree of efficiency the heat of a liquid discharge substrate of an ink jet recording head and effectively suppress increases in the substrate temperature, this invention provides an ink jet recording head in which a liquid discharge substrate is mounted on a supporting member through a foil-shaped heat dissipation member, in which the area of the heat dissipation member is greater than the projected area of the liquid discharge substrate with respect to the supporting member.

Abstract: An ink jet recording head includes a recording element substrate having an array of discharge ports and a side surface extending along an array direction of the discharge ports, and an opposite surface facing the side surface. A minimum distance is provided between the opposite surface and the side surface at least at a center portion of the side surface. Also, a distance greater than the minimum distance is provided between the opposite surface and the side surface at an end portion of the side surface in the array direction.

Abstract: To provide a highly reliable, compact, and inexpensive ink jet recording head, the present invention includes: a liquid discharge substrate having on a front surface side a discharge port for discharging a liquid, and having, on a back surface side, a liquid discharge port for supplying the liquid discharged from the discharge port, and an electrode for transmitting and receiving a signal to drive energy generation means for discharging the liquid from the discharge port; a film-like electrical wiring member joined to the back surface of the liquid discharge substrate, the film-like electrical wiring member including a liquid supply hole communicating with the liquid supply port of the liquid discharge substrate, and an electrical connection portion connected to the electrode; and a retaining member for retaining the liquid discharge substrate with the electrical wiring member interposed therebetween, the retaining member including a liquid supply port for supplying the liquid to the liquid supply port of the

Abstract: The present invention provides a highly reliable, small-sized, and inexpensive ink jet recording head by configuring the ink jet recording head including an electrical wiring member that is joined with a back surface of a liquid discharge substrate, and that includes a liquid supply port communicating with the liquid supply port of the liquid discharge substrate and an electrical connection portion connected to the electrode; and a holding member that holds the liquid discharge substrate through the electrical wiring member, and that includes a liquid supply port for supplying the liquid to the liquid supply port of the liquid discharge substrate, wherein the liquid supply port of the electrical wiring member, the liquid supply port of the liquid discharge substrate, and the liquid supply port of the holding member communicate with one another, a sealing agent for sealing the electrical connection portion is filled up between the liquid discharge substrate and the electrical wiring member, and a side surface