Abstract: A manufacturing method, for a liquid discharge head that includes a silicon substrate in which a supply port is formed for supplying a liquid, includes the steps of providing the silicon substrate, a mask layer provided with an opening that corresponds to the supply port being provided on one face of the silicon substrate; forming a groove in the silicon substrate along the shape of the opening in the mask layer; removing, via sandblasting, silicon of the silicon substrate inward of the groove in the silicon substrate; and performing, from the one face, anisotropic etching of the silicon substrate that has been sandblasted, and forming the supply port.

Abstract: A substrate for an ink jet head is provided with a plurality of energy generating members generating energy used for discharging an ink, an electrode pad which is arranged near a side of the substrate, and is for electrically connecting to an outside of the substrate, a plurality of electrode wirings for electrically connecting the plurality of energy generating members and the electrode pad, and a plurality of resistance elements which are respectively provided at the plurality of electrode wirings. Resistance values of the plurality of resistance elements differ from one another according to resistance values of the electrode wirings provided with the respective resistance elements.

Abstract: Provided is a liquid ejection head having a structure in which an organic resinous member is formed in contact with a substrate. The substrate includes heat generators for generating heat energy used to eject ink, when being energized, and a metallic line portion for energizing the heat generators. The organic resinous member is provided with ejection openings corresponding to the heat generators. In the liquid ejection head, the substrate and the organic resinous member have an improved adhesion therebetween, and are prevented from being separated from each other. To improve the adhesion, the metallic line portion is cut so that no line portion exists under an end part of the organic resinous member (nozzle formation member). Then, two members of the line portion thus cut are connected to each other through a roundabout line formed under an insulating layer which has a good adhesion to the organic resin.

Abstract: A method of manufacturing a liquid ejection head and a liquid ejection head capable of preventing corrosion of electrodes are provided. The method of manufacturing a liquid ejection head includes: a step of forming porous silicon areas in portions of a silicon substrate where the liquid paths are to be formed; a step of forming in layers in the porous silicon areas a protective layer, a heating resistor layer, an electrode layer and a heat accumulation layer; a step of forming ink ejection openings in the silicon substrate; and a step of removing the porous silicon areas.

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 method for manufacturing a liquid discharge head includes heating the surface portion of power line that is to be in contact with a member made of resin, thereby forming, from a precious metal layer and a nickel layer, an adhesion layer made of an alloy containing precious metal and nickel as major components.

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 recording element substrate includes a substrate; an insulating layer disposed on the substrate; a plurality of heating portions which are arranged on the insulating layer and which produce thermal energy used to eject a liquid; and a plurality of heat conduction members, each being located between adjacent heating portions with respect to an arrangement direction of the heating portions, the heat conduction members being located between the substrate side principal surface of the insulating layer and the heating portion side principal surface of the insulating layer and having higher thermal conductivity than the insulating layer. The heat conduction members are in contact with a heat conduction layer which has higher thermal conductivity than the insulating layer.

Abstract: A base for a liquid discharge head includes a heat element which forms an exothermic portion 108, an electrode wire 105 that is electrically connected with the heat element, an insulative protective layer 106 provided above the heat generating resistive element and the electrode wire and an upper protective layer 107 provided on the protective layer. The upper protective layer is made from a TaSi alloy containing 22 at. % or more Si.

Abstract: A method for forming an element substrate which includes a substrate, an ink supply port penetrating substrate and energy supplying means for supplying ejection energy to ink introduced through ink supply port, the method includes a step of forming the energy supplying means on the substrate, then; a step of thinning the substrate, and then; an ink supply port forming step of forming the ink supply port in the substrate.

Abstract: A liquid discharge head includes a substrate having a discharge port, a plurality of energy generating elements disposed on a first surface of the substrate for generating energy to discharge liquid from the discharge port, a liquid supply port, and a member provided on the first surface and forming a wall of a liquid chamber and a wall of a liquid path from the liquid supply port through the liquid chamber to the discharge port. A plurality of first penetrating electrodes penetrate the substrate from the first surface to the second surface, wherein one of the first penetrating electrodes electrically connects one of the energy generating elements, and a plurality of second penetrating electrodes penetrate the substrate from the first surface to the second surface, wherein one of the second penetrating electrodes electrically connects to the same energy generating element connected to the first penetrating electrode.

Abstract: An electromagnetic vibrational diaphragm pump comprising an electromagnet portion having an electromagnet arranged in a frame, a vibrator which is supported in the electromagnet portion and equipped with a magnet, diaphragms with a large diameter and diaphragms with a small diameter which are successively connected with both ends of the vibrator, and the pump casing portions of the diaphragms with a large diameter and diaphragms with a small diameter which are fixed on the both end portions of the electromagnet portion, wherein the left and right pump casing portions have pump chambers respectively corresponding to the diaphragms with a large diameter and diaphragms with a small diameter. Medium pressure (about 50 to 200 kPa) can be generated.

Abstract: Provided is a liquid ejection head having a structure in which an organic resinous member is formed in contact with a substrate. The substrate includes heat generators for generating heat energy used to eject ink, when being energized, and a metallic line portion for energizing the heat generators. The organic resinous member is provided with ejection openings corresponding to the heat generators. In the liquid ejection head, the substrate and the organic resinous member have an improved adhesion therebetween, and are prevented from being separated from each other. To improve the adhesion, the metallic line portion is cut so that no line portion exists under an end part of the organic resinous member (nozzle formation member). Then, two members of the line portion thus cut are connected to each other through a roundabout line formed under an insulating layer which has a good adhesion to the organic resin.

Abstract: It is an objective of the present invention to provide an ink jet printing head substrate by which a high adhesion can be obtained between an electrode layer and a nozzle formation member and the corrosion or electrolysis for example of a electrode due to the contact between the electrode and ink can be reduced. To realize this, the present invention includes: an electrode layer for supplying power to a heat-generating portion that is provided on a substrate and that generates thermal energy for ejecting ink; and a resin layer provided on the electrode layer via a nickel-containing layer. The electrode layer includes precious metal as a main component. The nickel-containing layer consists of gold-nickel alloy containing nickel.

Abstract: Provided is a method of manufacturing a liquid ejection head having an element which generates energy utilized for ejecting liquid and an electrode layer electrically connected the element. The method includes the steps of: providing an electrode layer on a substrate, a width of one portion of the electrode layer being smaller than that of another portion near the one portion; providing a resist layer on a part of the electrode layer by any one of a screen printing method and a dispense method in such a manner that an end of the resist layer is positioned at the one portion; providing another layer on another part excluding the part of the electrode layer by utilizing the resist layer as a mask; and removing the resist layer.

Abstract: A substrate for an ink jet head is provided with a plurality of energy generating members generating energy used for discharging an ink, an electrode pad which is arranged near a side of the substrate, and is for electrically connecting to an outside of the substrate, a plurality of electrode wirings for electrically connecting the plurality of energy generating members and the electrode pad, and a plurality of resistance elements which are respectively provided at the plurality of electrode wirings. Resistance values of the plurality of resistance elements differ from one another according to resistance values of the electrode wirings provided with the respective resistance elements.

Abstract: A compact print head enabling high-quality, high-speed printing is provided. A liquid ejecting head includes: a substrate, having elements that generate energy used to eject liquid from ejection openings, and provided with a liquid supply port that communicates with a surface of the substrate having the elements and a opposite surface thereof; a member, provided above the surface of the substrate, and having walls of a liquid flow path that communicates with ejection openings and the supply port; an insulating layer, provided so as to cover the supply port, and provided with a plurality of through-holes; and a conducting layer electrically coupled to the elements, and provided within the insulating layer so as to be insulated with respect to the liquid.

Abstract: A centrifugal clutch includes a clutch weight in a plane perpendicular to a rotation axis of an input member for enabling friction fitting to an inside of a clutch housing. The clutch weight is turnably supported by a drive plate. A grooved portion is provided on a clutch weight in a position that is opposite to a drive plate. At least one end of grooved portion is closed and is formed in a turning direction of the clutch. A damping rubber supported by the drive plate abuts against an inside face of the grooved portion. The damping rubber is held in the grooved portion in a compressed state by being compressed between the drive plate and the clutch weight. The centrifugal clutch so configured effectively inhibits vibration of a clutch weight when the clutch is let in, and minimizes both the parts required and man-hours for assembly.

Abstract: A manufacturing method for manufacturing a liquid ejection element including a liquid flow path which is open at an ejection outlet for ejecting liquid, and an energy generating member for generating energy usable for ejecting the liquid from liquid flow path through the ejection outlet, the manufacturing method, includes a step of forming the energy generating member on a front side of a substrate; a step of forming a top plate member on the side having the energy generating member formed by the energy generating member forming step, wherein the top plate member is a member in which the liquid flow path and the ejection outlet are formed; and a step of thinning the substrate, having the top plate member formed thereon by the top plate member forming step, from a back side thereof.