Abstract: A recording head comprises a plurality of recording elements for performing recording; a driving circuit for driving the plurality of recording elements; and a predetermined voltage generating circuit for generating a predetermined voltage to be applied to the plurality of recording elements from voltage supplied from outside. With the head thus structured, a desired voltage is generated in the interior of the head by use of the predetermined voltage generating circuit for performing recording, thus making it possible to prevent the voltage drop which may take place if the voltage is supplied from outside through a cable, as well as to prevent the durability of the heat generating elements from being damaged due to noises. It also becomes possible to set the voltage to be applied to the recording elements at an optimal value corresponding to the discharge voltage, hence stabilizing ink discharges efficiently.

Abstract: A substrate for use of an ink jet head that constitutes an ink jet head includes a plurality of discharge ports for discharging liquid, a plurality of liquid flow paths communicated with the plurality of discharge ports, and first and second heat generating device arranged serially in the liquid flow paths in the flow path direction of the liquid flow paths for generating thermal energy which is utilized for discharging liquid in the liquid flow paths from the discharge ports, the first and second heat generating device being formed on the substrate.

Abstract: There is disclosed a solid semiconductor element which very efficiently detects information about a liquid and bidirectionally exchanges the information with the outside. The solid semiconductor element is disposed in a liquid container, and includes at least energy converting unit, information acquiring unit, and information communicating unit. The energy converting unit converts an electromotive force from the outside to a power, and operates the information acquiring unit and information communicating unit. The information acquiring unit acquires the information about the liquid in which the solid semiconductor element is disposed from the liquid, and the information communicating unit transmits the information acquired by the information acquiring unit to the outside.

Abstract: A method for producing a liquid discharge head provided with an element substrate and a ceiling plate which are fixed in a mutually opposed state, plural liquid path walls provided between said ceiling plate and said element substrate and defining plural liquid paths, plural discharge energy generating elements provided in parallel manner on the surface of said element substrate so as to be respectively positioned in said plural liquid paths, and plural movable members provided on said element substrate so as to respectively oppose said plural discharge energy generating elements and formed like a cantilever, fixed at the upstream ends in the flowing direction of the liquid in said liquid paths and having free ends at the downstream ends, the method comprising the steps of forming a gap forming member in a position, forming a first material layer, patterning an anti-etching protective film, forming a second material layer, removing a portion of said second material layer, cutting said element substrate, and r

Abstract: A liquid discharge head at least comprises a discharge opening for discharging the liquid, a liquid flow channel in communication with the discharge opening and for supplying the liquid to the discharge opening, a substrate equipped with a heat generator for producing a bubble in the liquid that is filled in the liquid flow channel, and a movable plate supported and fixed onto the substrate at a position of the substrate opposed to the heat generator and with a gap from the substrate, with a free end on the discharge opening side. The liquid discharge head can discharge the liquid from the discharge openings by forcing the free end of the movable plate to be displaced toward the discharge opening around a fulcrum portion made near a support and fixing portion of the movable plate with the substrate due to pressure caused by produced bubble.

Abstract: There is disclosed a head substrate of a printing head detachably mounted on a printer main body, comprising plural external connection terminals individually receiving, from the exterior, a binary logic signal corresponding to whether or not to execute a recording operation, a recording image signal and a clock signal, recording execution means for executing the recording operation according to the recording image signal and the clock signal entered through the external connection terminals, in case the binary logic signal is in a first state, data memory means for and data readout, and memory access means for recognizing the binary logic signal in a second state as an access permission signal and executing the memory access to the data memory means at a timing corresponding to the clock signal when the logic signal is a second state.

Abstract: In a liquid discharge head having an element substrate on the surface of which are provided in parallel a plurality of discharge energy generating elements generating heat energy for creating a bubble in liquid, a fixed portion provided on the element substrate so as to face the plurality of discharge energy generating elements, and fixed to the element substrate, and a plurality of movable members comprising a movable portion extending from the end portion of the fixed portion and displaced by the bubble, a fulcrum about which the movable portion is displaced is located on the movable portion other than a corner portion formed at the boundary between the movable portion and the fixed portion.

Abstract: A substrate for use of an ink jet head comprises a plurality of heat generating resistive elements formed on a substrate through insulation layer, electrode wiring electrically connected with said heat generating resistive elements, and protection layer to cover said heat generating resistive elements. Then, the protection layer of this substrate is made dielectric formed by plural atoms containing Si, and at the same time, the composition ratio of the dielectric of the portion of the protection layer at least nearest to the heat generating resistive elements is almost the stoichiometric composition ratio, and then, the composition ratio of the dielectric of the portion farthest from the heat generating resistive elements is richer in Si than the stoichiometric composition ratio.

Abstract: The present invention provides an electron emission device assured to emit electrons without requiring film thickness control on the order of submicrons and a production method of the electron emission device as well as a display apparatus using the electron emission device. The electron emission device includes a cathode electrode consisting of conductive fine particles adhered directly onto a substrate and electrons are emitted from these conductive fine particles when a predetermined electric field is applied.

Abstract: Beneath electro-thermal conversion device layers having heaters, a common electrode layer electrically connected to heaters through branch connection parts is laminated through a protective film, and discrete electrodes are formed on an upper surface of the electro-thermal conversion device layers putting the branch connection parts between, respectively.

Abstract: A recording head comprises a plurality of recording elements for performing recording; a driving circuit for driving the plurality of recording elements; and a predetermined voltage generating circuit for generating a predetermined voltage to be applied to the plurality of recording elements from voltage supplied from outside. With the head thus structured, a desired voltage is generated in the interior of the head by use of the predetermined voltage generating circuit for performing recording, thus making it possible to prevent the voltage drop which may take place if the voltage is supplied from outside through a cable, as well as to prevent the durability of the heat generating elements from being damaged due to noises. It also becomes possible to set the voltage to be applied to the recording elements at an optimal value corresponding to the discharge voltage, hence stabilizing ink discharges efficiently.

Abstract: In accordance with the present invention, there is provided a liquid discharge head comprising a discharge port for discharging liquid, a liquid flow path provided with a bubble generation means for generating bubbles in liquid and communicated with the discharge port, and a movable member provided facing said bubble generation means in said liquid flow path and having a free end on a downstream side toward the discharge port, a first surface provided with the bubble generation means being continued to at least one second surface of the side wall surface of said liquid flow path and the front end surface having the opening of the discharge port with a curved surface, the first surface being one of surfaces forming the liquid flow path.

Abstract: A method for manufacturing liquid discharge heads is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in liquid, and movable members facing the heat generating members, each being arranged in each liquid flow path, having the free end on the discharge port side with a specific gap with the heat generating member. This method comprises the steps of forming the boundary layer used for providing a gap between the movable member and the substrate above the heat generating member on the substrate, of laminating the movable member on the boundary layer so as to position the free end above the heat generating member, at the same time fixing the movable member on the substrate, and of forming the gap between the movable member and the heat generating member by use of the boundary layer.

Abstract: The present invention provides a method for manufacturing a liquid injecting head, in which liquid flow paths are defined by combining an element substrate having a plurality of discharge energy generating elements for applying discharge energy to liquid with a nozzle member having a plurality of liquid discharge nozzle grooves, which method comprises a step for preparing at least one material common to the element substrate as a base material of the nozzle member, a step for forming etching mask layers on a first surface of the base material of the nozzle member in which the nozzle grooves are formed and a second surface opposite to the first surface, a step for forming a recessed portion in the second surface of the base material by patterning the mask layer on the second surface of the base material and by effecting etching via the mask layer of the second surface, and a step for forming the nozzle grooves in the base material and for communicating the recessed portion with the nozzle grooves by patterning

Abstract: A head substrate for an ink jet head that discharges ink liquid retained in the ink retaining portion by the ink discharge mechanism in accordance with the printing data inputted from the outside into the data input portion comprises one base substrate having a specific position on the surface for the ink retaining portion to be arranged, and a fuse array storing various readably data freely by selective fusing. This head substrate further comprises a fuse logic circuit for controlling the operation of selective fusing of the fuse array and data reading. Then, the fuse array and the fuse logic circuit are arranged in a position in the direction orthogonal to the surface of the base substrate, but not overlapping with the ink retaining portion. With the fuse array and fuse logic circuit thus structured, this head can be made smaller and lighter in a better productivity as compared with a head for which a ROM chip should be installed separately.

Abstract: There is provided a liquid discharge head provided with an element substrate and a ceiling plate fixed in a mutually opposed state, plural liquid path lateral walls provided between the ceiling plate and the element substrate and defining plural light flow paths, plural discharge energy generating elements arranged in parallel on the surface of the element substrate so as to be respectively positioned in the plural liquid paths, plural movable members in the form of a beam supported at an end, provided on the element substrate so as to be respectively opposed to the plural discharge energy generating elements and provided with fixed ends at the upstream side in the liquid flowing direction in the liquid paths and free ends at the downstream ends, and plural projections provided on the ceiling plate for respectively limiting the amount of displacement of the plural movable members, the element substrate and the ceiling plate being composed of similar materials, wherein the liquid path lateral walls are formed

Abstract: A method for manufacturing liquid discharge heads is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in liquid, and movable members facing the heat generating members, each being arranged in each liquid flow path, having the free end on the discharge port side with a specific gap with the heat generating member. This method comprises the steps of forming the boundary layer used for providing a gap between the movable member and the substrate above the heat generating member on the substrate, of laminating the movable member on the boundary layer so as to position the free end above the heat generating member, at the same time fixing the movable member on the substrate, and of forming the gap between the movable member and the heat generating member by use of the boundary layer.

Abstract: A cold cathode field emission device comprising (a) a cathode electrode formed on a supporting substrate, and (b) a gate electrode which is formed above the cathode electrode and has an opening portion, and further comprising (c) an electron emitting portion composed of a carbon film formed on a surface of a portion of the cathode electrode which portion is positioned in a bottom portion of the opening portion.

Abstract: There is disclosed a solid semiconductor element which very efficiently detects information about a liquid and bidirectionally exchanges the information with the outside. The solid semiconductor element is disposed in a liquid container, and includes at least energy converting unit, information acquiring unit, and information communicating unit. The energy converting unit converts an electromotive force from the outside to a power, and operates the information acquiring unit and information communicating unit. The information acquiring unit acquires the information about the liquid in which the solid semiconductor element is disposed from the liquid, and the information communicating unit transmits the information acquired by the information acquiring unit to the outside.

Abstract: An ink tank is provided which can efficiently perform detection of information in an ink tank such as an ink residual amount in the ink tank with a simple configuration in which it is unnecessary to set wiring or the like. A solid semiconductor element, which is provided with an acquiring unit for acquiring environmental information of the outside, an information storing unit, a discriminating unit for comparing acquired information and stored information to make a determination, and an information communicating unit for displaying the acquired information or communicating the acquired information to the outside, is embedded in an outer wall of an ink tank such that the solid semiconductor element is exposed to an internal side and an external side of the ink tank from the outer wall.