Abstract: A substrate, for use in a liquid discharge head for discharging liquid by applying thermal energy thereto, is provided with a heat generating member for applying the thermal energy to the liquid and a movable member so positioned as to be opposed to the heat generating member, to be fixed at the upstream side in the flowing direction of the liquid and to have a free end at the downstream end. Two wiring layers for applying a voltage to the heat generating member are provided in a superposed manner with an interlayer insulation layer therebetween and are mutually connected electrically via a through-hole. The through-hole is provided in a position different from the boundary between a fixing portion and a movable portion of the movable member.

Abstract: An inkjet head is provided with a flexible printed circuit cable where a head body for ejecting ink and a connector are mounted at places different from each other, and the flexible printed circuit cable is bent between the head body and the connector so as to absorb tensile and pushing forces applied to the connector. The inkjet head is also provided with an ink ejecting portion for ejecting ink, a head-side connector and a supporting body or a cover for supporting or storing an electric connection portion or a flexible printed circuit cable interposed between the ink ejecting portion and the connector, and the head-side connector is supported by the supporting body or the cover so that the connector is movable in the three-dimensional directions.

Abstract: Methods and apparatus are provided for aligning a TAB circuit on first and second intersecting surfaces of a print head. The methods comprise aligning a chip portion of the TAB circuit on the first surface and applying a progressive force along the contact pad portion of the TAB circuit to align the contact pad portion on the second surface of the print head. The apparatus comprise a machine for aligning the chip portion of the TAB circuit on the first surface and roller for applying a progressive force along the contact pad portion of the TAB circuit to align the contact pad portion on the second surface.

Abstract: A liquid ejection head having a plurality of ejection outlets for ejecting liquid; a first substrate and a second substrate for constituting a plurality of liquid flow paths in fluid communication with the ejection outlets, respectively when combined with each other; a plurality of energy conversion elements disposed in the liquid flow paths, respectively to convert electrical energy to ejection energy for the liquid in the liquid flow paths; a plurality of elements or electric circuits having different functions for controlling driving conditions of the energy conversion elements; wherein the elements and electric circuits are provided either on the first substrate or the second substrate, depending on their functions.

Abstract: A substrate having plural recording elements and electrical leads for supplying electric signals to the recording elements includes electrical contacts for external electrical connection for reception of image signals used for driving the recording elements; and a processing circuit for converting signals which are serially supplied to the connecting contact to parallel signals to be applied to the recording elements.

Abstract: A heater chip module is provided comprising a carrier adapted to be secured directly to an ink-filled container, at least one heater chip having a base coupled to the carrier, and at least one nozzle plate coupled to the heater chip. The carrier includes inner side walls and a support section which together define an inner cavity. An edge feed heater chip is coupled to the carrier support section. The heater chip includes side walls. The support section includes first and second passages which define first and second paths for ink to travel from the container to the inner cavity. The inner cavity and the heater chip are sized such that a first side wall of the heater chip is spaced from a first inner side wall of the carrier and a second side wall of the heater chip is spaced from a second inner side wall of the carrier. A nozzle plate is coupled to the heater chip and the carrier. The nozzle plate has a width such that the nozzle plate extends over an outer surface of the carrier.

Abstract: An ink-jet printhead having a thin film substrate, the substrate including a plurality of thin film layers including a gold thin film layer overlying a tantalum thin film layer, an underlying passivation layer and an aluminum thin film layer underlying the passivation layer. A portion of the substrate is disposed adjacent an outer edge thereof and an ink barrier layer overlies the thin film substrate, the barrier layer having a first edge. The substrate portion extends beyond the barrier layer first edge. A plurality of bond pads is disposed on the substrate portion. Power and ground traces are coupled to a respective bond pad and are dropped through vias in the substrate portion to the thin film aluminum layer underlying the passivation layer. The traces are returned through vias to the gold thin film layer at a location separated from the barrier first edge.

Abstract: An ink jet recording head comprises a main body section having a joined surface in which one end of an ink supply passage for introducing ink from an ink reserving portion is open, a support member having a first joint surface joined to the joined surface in the main body section and a second joint surface disposed opposite to the first joint surface, the support member having a communicating passage in communication with the one end of the ink supply passage, and a recording element board comprising an ink heating portion disposed on the second joint surface of the support member and arranged to heat the ink supplied through the communicating passage, and an ink ejection outlet forming portion in which an ink ejection outlet for ejecting the ink heated by the ink heating portion is formed, wherein thermal properties in materials of the recording element board and the support member are of the same quality.

Abstract: The present invention provides an ink-jet printhead substructure highly thermally efficient and greatly simplified in both the method of manufacture and resulting structure. The printhead substructure of the present invention comprises a resistor formed on an insulated substrate, a single conductive layer that provides both the conductive bonding interconnect pads and the conductive traces for the substructure, a passivation layer and a cavitation barrier. The resistor, passivation layer and cavitation barrier may comprise a single graded layer. The graded thin-film structure provides the resistor, passivation and cavitation barrier components without creating abrupt layer interfaces thereby, improving printhead reliability and durability. Fabrication of the printhead substructure of the present invention requires only two or three lithographic masks and a minimized number of sputter source materials.

Abstract: An inkjet recording head and an inkjet recording apparatus capable of mounting the inkjet recording head. The inkjet recording head includes a plurality of electrothermal conversion members, a plurality of driving elements, a plurality of discharge openings, a common wiring, an ink path, and an ink supply opening. Each electrothermal conversion member includes a heating resistor and a pair of electrodes. Each driving element is electrically connected to one of the pair of electrodes of its associated electrothermal conversion member. The common wiring is electrically connected to the other of the pair of electrodes of each electrothermal conversion member. The heating resistors are disposed along the ink supply opening in the longitudinal direction thereof such that their shortest distances from the ink supply opening differ based on the time-sharing driving timings.

Abstract: The systems and methods of this invention allows for an electrical contact structure of the drop ejecting transducer in an inkjet printhead to be designed in such a way that the relatively thick electrical contact lines are not in the ink drop ejection path between the drop ejector transducer and the corresponding nozzle. Such a design thereby minimizes any visible defects due to misdirected satellite drops.

Abstract: An ink jet recording apparatus includes an ink jet recording head as an essential component, and the ink jet recording head has a wiring structure which assures that a quantity of electricity loss induced by wiring resistance can be reduced. A plurality of substantially rectangular heaters 2 are formed at the positions in the vicinity of one end edge 1a of a device substrate 1 while they are arranged in an array in parallel with the one end edge 1a of the device substrate 1 with a predetermined distance held between adjacent heaters 2. Each heater 2 is composed of heaters 2a and 2b in the form of a pair. A common wiring portion 3 made of a metallic material such as aluminum or the like is formed between a pair of heaters 2, and it is electrically connected to electrodes of the heaters 2 on one side of the latter on the common basis.

Abstract: It is intended to secure the space for the signal wirings in the manufacture of an ink jet recording element unit of a high density. In the manufacture of the ink jet recording element unit by providing, on a substrate, a plurality of recording elements each composed of an individual electrode, an electrothermal converting element, a common electrode and a return electrode, a notch portion is formed on the outer edge of the electrothermal converting member adjacent to the return electrode.

Abstract: A substrate for a recording head includes a heat generating resistor for generating thermal energy to eject liquid, and a pair of opposed electrodes which are electrically connected to the heat generating resistor to supply electric signal to that heat generating resistor. A portion of the heat generating resistor interposed between the electrodes constitutes a heat generating portion, and the electrodes have respective ends adjacent to the heat generating resistor, each of which ends has a smooth convex shape. The width of a pattern constituting the heat generating resistor is greater than a width of a pattern constituting the electrodes.

Abstract: In order to simply form individual wiring and common wiring in single layer, single layer of individual wiring and common wiring connected to heating resistors are formed. Electrode connected to common wiring is located at a position closer to the heating resistor than electrodes connected to the individual wiring.

Abstract: A printhead is provided comprising a plate having a plurality of orifices through which ink droplets are ejected and a heater chip coupled to the plate. The heater chip includes at least one heating element provided on a main body portion of the heater chip. The main body portion includes at least one first conductor and at least one second conductor for providing current to the heating element. The first conductor is positioned in a first plane and the second conductor is positioned in a second plane which is vertically spaced from the first plane. The heating element is positioned between the first and second conductors and has a substantially constant cross-sectional area along a first axis which is generally parallel to the direction of current flow.

Abstract: A recording head is equipped with a plurality of liquid discharge portions, each having a discharge opening for discharging ink, and a substrate. The substrate is provided with a plurality of electrothermal transducers for generating thermal energy to be utilized for discharging the ink supplied to the liquid discharging portions and a plurality of functional devices connected electrically to the electrothermal transducers. The plurality of functional devices are arranged in a direction diagonal relative to an arrangement direction of the plurality of electrothermal transducers within a region provided with a wiring portion and have different characteristic curves of saturated voltage versus temperature corresponding to the distance from the electrothermal transducers. The region includes common electrode wiring and selective electrode wiring for the plurality of electrothermal transducers and the plurality of functional devices.

Abstract: A liquid ejection head includes a head chip having a plurality of ejection openings, ejection energy generating means for ejecting a liquid from the ejection openings, and a liquid chamber communicated with the ejection openings and being supplied a liquid, an electrical wiring substrate formed with a chip installation hole arranged wherein the head chip, a plurality of lead terminals projecting into the chip installation hole of the electrical wiring substrate and being connected to the head chip for supplying electric power to the ejection energy generating means, and a sealing material layer sealing connecting portion between the lead terminals and the head chip and formed over the electrical wiring substrate and the head chip, and a resin catching portion being provided in a gap between the chip installation hole and the head chip for receiving the seal resin for achieving high strength of the connecting portion between the head chip and the electric wiring substrate, and to achieve good seal.

Abstract: A substrate for an ink jet head comprises a base member and an electrothermal converting body formed on the base member, the electrothermal converting body including a resistor layer and a pair of electrode layers connected to the resistor layer wherein the resistor layer positioned between a pair of the electrode layers serves as a heat generating portion for generating thermal energy utilized for discharging ink; wherein one of a pair of the electrode layers passes under the heat generating portion; an electrode layer positioned under the heat generating portion has a multi-layer structure composed of a plurality of layers; and at least one of a plurality of the layers, being nearest to the heat generating portion, is made of a metal having a melting point of 1500.degree. C. or more at 1 atm. An ink jet head using this substrate is able to prolong service life while reducing a failure ratio, and to continue preferable ink discharge for a long period of time.

Abstract: A printhead is provided comprising a plate having a plurality of orifices through which ink droplets are ejected and a heater chip coupled to the plate. The heater chip includes a plurality of heating elements and first and second conductors for providing energy to the heating elements. The first and second conductors are arranged in spaced-apart planes and/or in a matrix.

Abstract: An ink jet head includes ink ejection outlet for ejecting ink, a plurality of heat generating resistors for generating thermal energy contributable to ejecting the ink, and ink flow path comprising the plurality of the heat generating resistors and being in fluid communication with the ejection outlet, the heat generating resistors generating the thermal energy upon receiving a driving signal, so that a bubble is generated in the ink within the ink flow path to eject the ink through the ink ejection outlet; wherein the plurality of the heat generating resistors are arranged in parallel, relative to the ink ejecting direction, in the ink flow path, and the distances from the heat generating centers of the heat generating resistors to the ejection outlet are different.

Abstract: In a recording head, in which a strip form resistor is arranged over comb-shaped electrode leads of common electrode leads from strip form common electrodes and individual electrode leads, a distance between electrode leads positioned at the center of the strip form resistor is shorter than at other portions. As a result of this, fluctuation of print dot size can be made smaller, fluctuation of printing color development density is reduced and improvement of tone printing performance can be achieved.

Abstract: A recording head is structured so that its elements are not easily destructed by the fusion of wiring due to electrostatic discharge, and a recording apparatus uses such recording head. A part of GND wiring on a wiring board is exposed. A base plate and the GND wiring on the wiring board is electrically connected by caulking a caulking pin arranged for such exposed portion. The resistance of the connected path is made lower than that of wires and others on a heater board. Also, even in a case where the base plate and the GND wiring on the wiring board are not directly in contact, the exposed portion of the GND wiring on the wiring board and the base plate are arranged to be extremely close to each other, hence making it possible to form such a low-resistance path.

Abstract: An ink jet recording head includes a substrate with ejection energy generating elements for ejecting ink, a wiring board electrically connected at a first connecting region to an electric connection pad on the substrate and functioning to apply voltage to the ejection energy generating elements, and a plate is combined with the substrate, the plate being provided with a groove constituting an ink passage when it is combined with the substrate. A second connecting region is found between the substrate and plate, the substrate having a projection at a position between the second connecting region and the pad, the first connecting region and second connecting region each being sealed by a resin sealing material.

Abstract: A driving voltage of a discharging heater in an ink jet recording head is set according to property of the individual recording head. More specifically, sub-heaters are formed on a board on which discharging heaters are formed, by a same process as that for the discharging heaters. Resistance values of the sub-heaters are read so that the driving voltage of the discharging heaters can be set on the basis of the read resistance values.

Abstract: An ink jet recording method includes the steps of providing an ink jet recording head having a plurality of discharge openings for discharging ink, a plurality of liquid passageways for holding ink and a plurality of heat generating members. Each of the heat generating members corresponds to a liquid passageway and each heat generating member has a pair of electrodes for driving the heat generating member individually and the electrodes and corresponding heat generating member form a U-shaped wiring portion. The recording head may be manufactured using a cutting process. A voltage is applied to selected pairs of electrodes for driving selected heat generating members individually for providing thermal energy to the ink in the liquid passageway for abruptly forming a bubble and discharging ink from the discharge opening and recording on a recording medium.

Abstract: Disclosed is a process which comprises reacting a polyimide precursor with borane. Also disclosed is a thermal ink jet printhead containing a layer comprising the product of this reaction.

Abstract: A method of fabricating bubblejet print devices uses semiconductor fabrication techniques, and this method involves forming a heater means and an electrical connection to the heater means on a substrate, and forming a passageway through the substrate. A given end of the passageway is disposed adjacent to the heater means, and this given end is formed as an outlet for ejecting ink.

Abstract: To generate an amount of heat uniformly in respective heaters which are selectively driven to eject ink droplets from the corresponding nozzles, a bypass common line is connected to a common conductor line with at least one connection conductor line. The heaters are connected between an LSI driver circuit and the common conductor line. The common conductor line and the connection conductor lines are made from nickel and the bypass common line is made from aluminum. Alternatively, the common conductor line may be of a three-lay structure having a first layer of a thin-film aluminum, a second layer of a Ta--Si--O alloy thin-film deposited to cover the first layer, and a third layer of a nickel thin-film deposited on the second layer.

Abstract: Large print heads with many thousands of nozzles may have current consumption in excess of 20 Amperes. This would cause significant problems if standard interconnection techniques were used. The present invention effects very high current delivery to print heads by utilizing the entire long edges of the print head as power terminals.The V+ and V- connections are fabricated as 200 .mu.m wide strips of 1 .mu.m aluminum along the edges of the chip which are perpendicular to the print direction. Lines of aluminum extend from the V.sup.+ connection until the row of nozzles closest to the V.sup.- connection. These lines pass between every second nozzle, and are as wide as the device layout and process technology will allow. Lines of aluminum extend from the V.sup.- connection until the row of nozzles closest to the V.sup.+ connection. These lines are interdigitated with the V.sup.+ lines.

Abstract: An inkjet printhead structure comprises novel resistor circuitry that is fabricated on two different substrate layers. The dual layer circuitry reduces the required substrate surface area and printhead shelf length to increase the printer operating frequency and print density. In one embodiment of the invention, heating resistors are spread out over portions of the substrate surface area and conductors are attached to opposite ends of the heater resistors in a novel configuration. To simplify routing, the circuitry is configured so that multiple heater resistors are coupled to the same conductor return path located on a second conductive layer. In a second embodiment of the invention, the heater resistors are dimensioned in the shape of a trapezoid to provide uniform heating. Alternative resistor shapes are then introduced to provide consistent heat dissipation for variances in resistor/conductor sheet resistance.

Abstract: A recording element driving unit has an electrical connecting member having a support member of electrically insulating material and electroconductive members arranged on the support member. Each electroconductive member has one end exposed on one surface of the support member and another end exposed on another surface of the support member. A recording element substrate having recording elements is connected to one exposed end of at least one electroconductive member. A driving element substrate has driving elements thereon, and each driving element has connecting portions. The driving elements are larger in number than a number of driving elements electrically connected to the recording elements and are fewer in number than the electroconductive members.

Abstract: An ink jet recording head apparatus of simplified construction comprising ink flow channels defined by electrical conductors; the conductors connected to a reduced number of drive sources by a reduced number of electrodes; and an ink supply comprised of an absorbent pad.

Abstract: An ink jet recording head includes a first substrate having energy generating elements for generating energy for ejecting liquid; a second substrate connected with the first substrate; discrete electrodes electrically connected with the energy generating elements, respectively; and a common electrode electrically connected with the energy generating elements; wherein the discrete electrodes are on the first substrate, and the common electrode is on the second substrate.

Abstract: An ink jet head substrate including a base plate; an elongated through opening, for ink supply port, extending in a longitudinal direction of the base plate; a plurality of heat generating resisters arranged on the base plate along both sides of the opening; a pair of electrodes electrically connected to the heat generating resisters; electrode pads for external electric connection, the pad being arranged adjacent opposite ends of the base plate substantially in parallel with a line along which the heat generating resisters are arranged; wherein a length Ls of the base plate measured in a direction along the line, a length Lh of a range in which the heat generating resisters are arranged, and a length Lp of a range in which the pads are disposed, satisfyLp.ltoreq.Ls-2.times.(Ls-Lh).

Abstract: A recording head has a substrate on which a plurality of heat generating elements as recording elements are arranged and a plurality of driving integrated circuits (driving ICs) to drive the plurality of heat generating elements are supported. The recording head comprises wirings which are extended from the heat generating elements and pass through a region on the substrate on which the driving ICs are supported and are connected to the driving ICs; signal series wirings which are arranged on the heat generating element side of the substrate, are closer to the heat generating elements than terminals for the wiring connection, and serially connect the driving ICs; and conductors which are formed in a region on the substrate between the adjacent driving ICs and connect recording current to the ground.

Abstract: A printer ink cartridge includes a rigid cartridge body containing ink, a plurality of ink orifices, a jet plate, a plurality of electrical conductors and a control and driver circuit. The control and driver circuit is attached to the cartridge body spaced apart from the jet plate, and the plurality of electrical conductors connect the jet plate to the control and driver circuit. The jet plate includes heating elements located proximate to an associated one of the ink orifices to heat a portion of the ink and to expelling the ink from the associated orifice. The control and driver circuit contains a control circuit and a plurality of driver circuits. A portion of the control circuit is connected to the plurality of driver circuits to control when one of the driver circuits is energized. Each of the driver circuits is connected to an associated one of the heating elements.

Abstract: A process for producing an ink jet recording device involves providing a support member having an electro-thermal converting member and a wiring electrically connected to the electro-thermal converting member thereon, forming a first insulating layer on the support member, and forming on the support member a second insulating layer for increasing a protruded height of a bump-shaped electrode, the second insulating layer having a desired thickness. Other steps in the method involve removing part of the first and second insulating layers to expose a portion of the wiring, forming a bump-shaped electrode to a height corresponding to the thickness of the second insulating layer on the exposed portion of the wiring by electroplating, and removing the second insulating layer, resulting in the bump-shaped electrode having a desired height.

Abstract: A bipolar ink jet driver circuit includes a plurality of individual driver cells having a common collector and a resistive heater element. A common collector obviates the need for any isolation between adjacent driver cells. The driver cells each include two bipolar transistors configured as a Darlington pair, which drive an associated resistive heater element. The cells are grouped together to form individual driver circuits each having a control line for enabling each driver circuit. The cells within each driver circuit are individually addressable via address lines which are coupled to each of the driver elements. The resistive heater elements are actuated by enabling a driver circuit and addressing a driver cell within the enabled driver circuit.

Abstract: A recording device includes a substrate having both an ink discharge portion with openings for discharging ink and a liquid chamber for holding the ink for supply to the openings, and a wiring portion transmits signals to electro-thermal converting elements. The wiring portion includes several electroconductive layers, an interlayer insulating layer made of first and second insulating layers, and a protective layer. Some of the layers have through holes, and the through holes are disposed within the liquid chamber. Different electroconductive layers are electrically connected via a through hole formed in the interlayer insulating layer. The through hole size varies so that the hole in a second electroconductive layer is larger than the through hole in a first electroconductive layer.

Abstract: An inkjet printhead includes a compact substrate having transmission circuitry such as actuation signal lines and address circuitry and ground lines in connection with resistors in a plurality of vaporization chambers on the substrate, with a minimal number of interconnect junctions located at both ends of the substrate. A print cartridge holding the inkjet printhead has a flexible circuit member with conductive traces permanently bonded at one end to the interconnect junctions and terminating at the other end at cartridge interconnect pads.

Abstract: An ink jet head comprises an discharging element having discharging ports to discharge ink, ink passages conductively connected to the foregoing discharging ports, and exothermic elements giving thermal energy to ink distributed in the ink passages, and at least a part of such an element is covered with a silicone resin, the amount of low molecular siloxane content of which is 500 ppm or less. Thus, in a thermal jet recording head, the low molecular siloxane divergence is lowered in its process of hardening or after hardening to enable the reduction of the occurrence frequency of the abnormal ink foaming, contributing to the improvement of the reliability of the thermal jet recording head as well as to the improvement of the yield in its fabrication.

Abstract: In an inkjet print cartridge having a polymer nozzle member with windows formed therein for facilitating bonding of conductors to electrodes on a substrate, an adhesive is dispensed through the windows to encapsulate the exposed conductors bonded to the electrodes. The adhesive typically overflows outside the windows. To prevent the adhesive from flowing uncontrolled towards the nozzles formed in the nozzle member, a disruption or surface discontinuity is formed in the nozzle member surface between the windows and the nozzles. This disruption or surface discontinuity may be formed by either scratching, etching, cutting, pressing a blade into, or laser ablating the tape surface, or forming a raised wall on the tape surface, such that the flow of adhesive is inhibited because of mechanical and surface forces.

Abstract: A multiplexed array of resistors including a plurality of address leads and a plurality of ground leads which cooperatively define a matrix of nodes, each node defining a possible location in the matrix for a resistor heater interconnecting one address lead and one ground lead. Resistor heaters are located in the array at only a portion of the nodes. The locations of the resistor heaters are selected to limit the conductance of alternate current paths around the resistor heater when addressed. The resistor heaters are preferably formed at nodes selected so that no two address leads are interconnected through resistor heaters to more than one common ground lead. Preferably, each alternate current path includes at least four non-addressed resistors in series.

Abstract: An improved substrate for an ink jet head includes a pair of first wiring electrode layers disposed on a base member through a first electrode contact layer, and a pair of second wiring electrode layers disposed on a pair of first wiring electrode layers through a second electrode contact layer composed of an electroconductive material such that the pair of second wiring electrode layers correspond to the pair of first wiring electrode layers. Either the first electrode contact layer or the second electrode contact layer contains a heat generating resistor layer capable of being energized upon the application of a voltage through the pair of first wiring electrode layers or the pair of second wiring electrode layers.

Abstract: In a print cartridge according to the preferred embodiment of the invention, a polymer tape having orifices formed therein and containing conductive traces has a substrate containing heater elements affixed to a back surface of the tape. Each of the heater elements in the substrate is located substantially behind each of the orifices. The edges of the nozzle member overlap the edges of the substrate, and the back surface of the tape is sealed with respect to an ink reservoir so that a seal substantially circumscribes the substrate. This allows ink to flow around the side edges of the substrate and into vaporization chambers associated with each orifice. The conductive traces on the tape are attached to electrodes along the shorter side edges of the substrate so as not to interfere with the edge-feed of ink along the longer edges of the substrate.

Abstract: An electricity-heat converter is provided on a substrate for a recording head. The recording head generates heat energy for discharging recording liquid by causing the state change of the liquid to occur. A multi-layer wiring is sandwiched between insulating layers comprising an organic material and is connected electrically to the electricity-heat converter through at least one contact portion formed through the insulating layer. The contact portion is provided in a discharging portion of the recording heads.

Abstract: An electrically conducting sheet comprises a plurality of electrically conductive members arranged in a insulator, for electrically connecting a plurality of wiring pads on a first substrate and a corresponding plurality of wiring pads on a second substrate one by one to each other by its intervention between the first and second substrates. The distribution density of the electrically conductive members is set to be different in place. Alternatively, the size of the electrically conductive members may be set to be different in position. The electrically conducting sheet can be used in a recording head incorporated into a recording apparatus.

Abstract: A substantially uniform and nevertheless low feed line resistance of the conductor paths (L.sub.i) can be realized for all heating elements in an ink jet printer by a suitable dimensioning of a transition structure (UV) of a conductor path layout disposed on a thin-film substrate. This transition structure connects the conductor paths of close spacing (LA) in the region of the heating elements (RH) to the conductor paths of wide spacing (LB) in the region of the bonding contacts to each other. For this purpose a dimensioning requirement is required, which in case of predetermined input values, i.e. the conductor path widths (d.sub.a, d.sub.b) and the separation distance widths (s.sub.a, s.sub.b) furnishes in the two regions and in the separation distance width (s.sub.v) of the transition structure (UV) as starting value the conductor width (d.sub.v) in the transition structure (UV).