EP0349959A2 - Tintenstrahlaufzeichnungsvorrichtung - Google Patents

Tintenstrahlaufzeichnungsvorrichtung Download PDF

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Publication number
EP0349959A2
EP0349959A2 EP89112127A EP89112127A EP0349959A2 EP 0349959 A2 EP0349959 A2 EP 0349959A2 EP 89112127 A EP89112127 A EP 89112127A EP 89112127 A EP89112127 A EP 89112127A EP 0349959 A2 EP0349959 A2 EP 0349959A2
Authority
EP
European Patent Office
Prior art keywords
recording element
element substrate
recording
driving
electroconductive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89112127A
Other languages
English (en)
French (fr)
Other versions
EP0349959B1 (de
EP0349959A3 (de
Inventor
Yutaka Koizumi
Yasutomo Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP63172295A external-priority patent/JP2695441B2/ja
Priority claimed from JP63172294A external-priority patent/JP2825159B2/ja
Priority claimed from JP63182879A external-priority patent/JP2927432B2/ja
Priority claimed from JP1002273A external-priority patent/JP2798403B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0349959A2 publication Critical patent/EP0349959A2/de
Publication of EP0349959A3 publication Critical patent/EP0349959A3/de
Application granted granted Critical
Publication of EP0349959B1 publication Critical patent/EP0349959B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14016—Structure of bubble jet print heads
    • B41J2/14072—Electrical connections, e.g. details on electrodes, connecting the chip to the outside...
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14016—Structure of bubble jet print heads
    • B41J2/14024—Assembling head parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14379—Edge shooter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/19—Assembling head units

Definitions

  • This invention relates to a recording element unit, and a recording element driving unit, an ink jet unit, an ink jet driving unit and an ink jet device by using the same.
  • This method is a method in which a recording element substrate is fixed and supported on a driving element substrate by use of Ag paste, etc., and then the connecting portion of the recording element substrate and the desired connecting portion of the recording element substrate are electrically connected by use of a very fine metal wire such as of gold, etc.
  • this method is a method in which the electrodes 14, 15 of the recording element substrate 4 are electrically connected to the desired electrode of the driving element substrate by use of a very fine metal wire 16 such as of gold, etc.
  • This method is a method in which the recording elements 603 and the driving elements 101 are formed on an integral substrate 900 according to a suitable film forming technique.
  • the height h of the very fine metal wire measured from the connecting portion on the driving element is generally 0.2 to 0.4 mm, and since it is relatively difficult to make the thickness thinner than 0.2 mm, it is impossible to effect thinning.
  • the present invention provides a recording element unit, a recording element driving unit, an ink jet unit and an ink jet driving unit provided with electrical connecting members capable of solving the problems as described above, arranging a large number of connecting portions of recording elements and driving elements at high density, and therefore accomplishing miniaturization of even lengthy units easily.
  • Such invention is a recording element unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member;and a recording element substrate having a plurality of recording elements more by at least one than the necessary number arranged thereon; one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to said recording element.
  • a recording element driving unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a recording element arranged thereon; and a driving element substrate having a driving element having connecting portios more by at least one than the necessary number arranged thereon, one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to said recording element; the other end of the electroconductive member exposed on the other surface of said electrical connecting member being connected to the connecting portion of said driving element.
  • Still another invention is an ink jet unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of recording elements more by at least one than the necessary number arranged thereon; said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink formed thereon.
  • Still another invention is an ink jet driving unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of recording elements arranged thereon; and a driving element substrate having a driving element having connecting portions more by at least one than the necessary number arranged thereon, said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink formed thereon; one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to said recording element; the other end of the electroconductive member exposed on the other surface of said electrical connecting member being connected to the connecting portion of said driving element, and also an ink jet device having said ink jet driving unit and a means for mounting said ink jet driving unit.
  • Still another invention is a recording element driving unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of recording elements arranged thereon; and a driving element substrate having a plurality of driving elements arranged thereon; a base member for arranging said recording element substrate and said driving element substrate; a circuit substrate to which said recording element substrate is connected through a first one of said electrical connecting members and said driving element unit is connected through a second one of said electrical connecting members on the surface where a wiring pattern is formed; and a pressure contact member for pressure contacting said circuit substrate with said recording element substrate, and said circuit substrate with said driving element substrate, respectively through said electrical connecting members.
  • Still another invention is an ink jet driving unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of recording elements arranged thereon; and a driving element substrate having a plurality of driving elements arranged thereon; a base member for arranging said recording element substrate and said driving element substrate; a circuit substrate to which said recording element substrate is connected through a first one of said electrical connecting members and said driving element substrate is connected through a second one of said electrical connecting members on the surface where a wiring pattern is formed; and a pressure contact member for pressure contacting said circuit substrate with said recording element substrate, and said circuit substrate with said driving element substrate, respectively through said electrical connecting members, said recording element substrate having a liquid pathway communicated to a discharging opening for discharging in
  • Still another invention is a recording element driving unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of recording elements arranged thereon; and a driving element substrate having a plurality of driving elements arranged thereon; a circuit substrate for transmitting a driving signal to said driving element substrate; a base member for arranging said recording element substrate and said driving element substrate; and a pressure contact member for pressure contacting said recording element substrate with said driving element substrate and said circuit substrate with said driving element substrate, respectively through said electrical connecting members, said recording element substrate and said driving element substrate being electrically connected through a first one of said electrical connecting members, and said driving element substrate and said circuit substrate being electrically connected through a second one of said electrical connecting members.
  • Still another invention is an ink jet driving unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of recording elements arranged thereon; a driving element substrate having a plurality of driving elements arranged thereon; a circuit substrate for transmitting a driving signal to said driving element substrate; a base member for arranging said recording element substrate and said circuit substrate; and a pressure contact member for pressure contacting said recording element substrate with said driving element substrate and said circuit substrate with said driving element substrate, respectively through said electrical connecting members, said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink; said recording element substrate and said driving element substrate being electrically connected through a first one of said electrical connecting members, and said driving element substrate and said circuit substrate
  • Still another invention is a recording element unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon, said plurality of electrical connecting members being arranged on said recording element substrate so that one end of the electroconductive member exposed on one surface of each electrical connecting member may be connected to the connecting portion of said recording element substrate.
  • Still another invention is a recording element unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material having at least one of one or a plurality of grooves and holes and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon, one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to the connecting portion of said recording element substrate.
  • Still another invention is a recording element driving unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material having at least one of one or a plurality of grooves and holes and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon, a driving element substrate having a plurality of connecting portions and one or a plurality of driving elements arranged thereon, said plurality of electrical connecting members being arranged on said recording element substrate so that one end of the electroconductive member exposed on one surface of each electrical connecting member may be connected to the connecting portion of said recording element substrate; the other end of the electroconductive member exposed on the other surface of said each electrical connecting member being connected to the connecting portion of said driving element substrate.
  • Still another invention is a recording element driving unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material having at least one of one or a plurality of grooves and holes and a plurality of electroconductive members arranged on said holding member arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon; and a driving element substrate having a plurality of connecting portions and one or a plurality of driving elements arranged thereon; one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to the connecting portion of said recording element substrate, the other end of the electroconductive member exposed on the other surface of said each electrical connecting member being connected to the connecting portion of said driving element substrate.
  • Still another invention is an ink jet unit comprising: a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon, said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink formed thereon, said plurality of electrical connecting members being arranged on said recording element substrate so that one end of the electroconductive member exposed on one surface of each electrical connecting member may be connected to the connecting portion of said recording element substrate.
  • Still another invention is an ink jet unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material having at least one of one or a pluralty of grooves and holes and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon, said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink formed thereon, one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to the connecting portion of said recording element substrate.
  • Still another invention is an ink jet driving unit comprising; a plurality of electrical connecting members each having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon; and a driving element substrate having a plurality of connecting portions and one or a plurality of driving elements arranged thereon, said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink formed thereon, said plurality of electrical connecting members being arranged on said recording element substrate so that one end of the electroconductive member exposed on one surface of each electrical connecting member may be connected to the connecting portion of said recording element substrate; the other end of the electroconductive member exposed on the other surface of said each electrical connecting member being connected to the connecting portion of said driving element substrate, and an in
  • Still another invention is an ink jet driving unit comprising: an electrical connecting member having a holding member formed by use of an electrically insulating material having at least one or a plurality of grooves and holes and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of connecting portions and a plurality of recording elements arranged thereon, a driving element substrate having a plurality of connecting portions and one or a plurality of driving elements arranged thereon; said recording element substrate having a liquid pathway communicated to a discharging opening for discharging ink formed thereon, one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to the connecting portion of said recording element substrate, the other end of the electroconductive member exposed on the other surface of said each electrical connecting member being connected to the connecting portion of said driving element substrate, and an ink jet device comprising said ink jet
  • the electrical connecting member according to the present invention has a plurality of electroconductive members arranged on a holding member comprising an electrically insulating material.
  • the electroconductive members arranged are electrically separated mutually from each other. Arrangement may be done by, for example, embedding a part of the electroconductive member in the holding member, or according to other methods. For example, without embedding in the holding member, it may be arranged on the surface of the holding member according to a suitable means.
  • One end of the electroconductive member is exposed on one surface of the holding member, while the other end is exposed on the other surface of the holding member.
  • one end and the other end may be connected to each other by a suitable wiring.
  • the electrical connecting member may also comprise one layer or a multi-layer of two or more layers.
  • the size of one electrical connecting member and the number of electrical electroconductive members arranged are not particularly limited. This is because these optimum values are determined depending on the pitch of the electroconductive members and thermal expansion coefficient of the holding member, etc.
  • the size, pitch, number, etc. of the groove and/or hole of the electroconductive member provided with groove and/or hole according to the present invention are not also particularly limited.
  • Any electroconductive member exhibiting electrically conductivity may be available.
  • Metal materials are generally employed, but other than metal materials, materials exhibiting superconductivity, etc. may be also employed.
  • gold is preferred, but any other metal or alloy other than gold can be also used.
  • metals or alloys such as Ag, Be, Ca, Mg, Mo, Ni, W, Fe, Ti, In, Ta, Zn, Cu, Al, Sn, Pb-Sn, etc. may be included.
  • the metal member and the alloy member may have the same kind of metal or different kinds of metals existing in the same electrical connecting member. Further, one of the metal member and the alloy member of the electrical connecting member may be made of the same kind of metal or alloy or different kinds of metals or alloys. Further, other than metals or alloys, a material including one or both of organic material or inorganic material in a metal material may be also used, provided that it exhibits electroconductivity. Also, a combination of an inorganic material and an organic material which can exhibit electroconductivity may be also used.
  • cross-section of the electroconductive member can be made circular, square or other shapes.
  • the thickness of the electroconductive member is not particularly limited. It may be made, for example, 20 ⁇ m ⁇ or more or 20 ⁇ m ⁇ or less, in view of the pitch of the connecting portions of the electrical circuit part.
  • the exposed portion of the electroconductive member may be made the same plane as that of the holding member, or protruded from the surface of the holding member. Such protrusion may be either only from one surface or from both surfaces. Further, when protruded, it may be shaped in bump.
  • the pitch of the electroconductive members should preferably be made smaller than the pitch of the connecting portion of the driving elements.
  • the electroconductive members are not required to be vertically arranged in the holding member, but may be also made oblique from one surface side of the holding member to the other surface side of the holding member.
  • the holding member comprises an electrically insulating material.
  • any electrically insulating material may be available.
  • organic materials and inorganic materials may be included.
  • metals or alloys applied so treated so that the electroconductive members may be mutually electrically insulated from each other may be also used.
  • organic materials one kind or plural kinds of inorganic materials, metal materials and alloy materials shaped in any desired shape such as powder, fiber, plate, rod, sphere, etc. may be also dispersed to be included therein.
  • inorganic materials one kind or plural kinds of organic materials, metal materials and alloy materials shaped in any desired shape such as powder, fiber, plate, rod, sphere, etc may be also dispersed to be included therein.
  • metal materials one kind or plural kinds of inorganic materials, organic materials shaped in any desired shape such as powder, fiber, plate, rod, sphere, etc. may be dispersed to be included therein.
  • the holding member comprises a metal material, for example, an electrically insulating material such as resin, etc. may be arranged between the electroconductive members and the holding member.
  • thermosetting resin for example, insulating resins may be used, and as the resin, any of thermosetting resin, UV-ray curable resin, thermoplastic resin may be used.
  • thermoplastic resin any of thermosetting resin, UV-ray curable resin, thermoplastic resin may be used.
  • polyimide resin polyphenylene sulfide resin, polyethersulfone resin, polyether imide resin, polysulfone resin, fluorine resin, polycarbonate resin, polydiphenyl ether resin, polybenzylimidazole resin, polyamideimide resin, polypropylene resin, polyvinyl chloride resin, polystyrene resin, methyl methacrylate resin, polyphenylene oxide resin, phenol resin, melanine resin, epoxy resin, urea resin, methacrylic resin, vinylidene chloride resin, alkyd resin, silicone resin and other resins.
  • a resin with good thermal conductivity is used from among these resins, it is more preferable because even if the semiconductor element may accumulate heat, the heat can be dissipated through the resin. Further, if a resin having thermal expansion ratio equal or similar to that of the circuit substrate is chosen, and at least one hole or a plurality of bubbles are permitted to exist in the organic material, it becomes possible to further prevent lowering in reliability due to thermal expansion and thermal shrinkage.
  • metal materials and alloy materials may include metals or alloys such as Ag, Cu, Au, Al, Be, Ca, Mg, Mo, Fe, Ni, Si, Co, Mn, W, Cr, Nb, Sr, Ti, Ta, Zn, Sn, Pb-Sn, etc.
  • inorganic materials may include ceramics such as SiO2, B2O3, Al2O3, Na2O, K2O, CaO, ZnO, BaO, PbO, Sb2O3, As2O3, La2O3, ZrO2, BaO, P2O5, TiO2, MgO, SiC, BeO, BP, BN, AlN, B4C, TaC, TiB2, CrB2, TiN, Si3N4, Ta2O5, etc., diamond, glass, carbon, boron and other inorganic materials.
  • ceramics such as SiO2, B2O3, Al2O3, Na2O, K2O, CaO, ZnO, BaO, PbO, Sb2O3, As2O3, La2O3, ZrO2, BaO, P2O5, TiO2, MgO, SiC, BeO, BP, BN, AlN, B4C, TaC, TiB2, CrB2, TiN, Si3N4, Ta2O5, etc., diamond, glass, carbon, boron and
  • connection between the end of the electrical connecting member and the connecting portion of the recording element there are connection by way of metallization and/or alloy formation, and connection by way of other methods than metallization and/or alloy formation.
  • the layer formed by metallization becomes to have the crystal structure of the same kind as the electroconductive member or the connecting portion.
  • the method for metallization for example, the end of the electroconductive member and the connecting portion corresponding to that end may be contacted with each other, followed by heating to an appropriate temperature. In this case, diffusion of atoms, etc. will occur in the vicinity of the contacted portion by heating and the diffused portion becomes the metallized state to form a metal layer.
  • the connecting layer to be formed consists of an alloy of the both metals.
  • the end of the electroconductive member and the connecting portion corresponding to that end may be contacted with each other, followed by heating to an appropriate temperature. In this case, diffusion of atoms, etc. will occur in the vicinity of the contacted portion by heating and an alloy layer comprising a solid solution or an intermetallic compound formed in the vicinity of the contacted portion.
  • a heating temperature of 200 to 350 o C may be preferred.
  • the connecting interface comprises an alloy layer.
  • electroconductive members in one electrical connecting member there are included the case when the respective electroconductive members consist of the same kind of metal or alloy, the case when the respective members consist of different kinds of metals or alloys, and other cases, and also concerning one electroconductive member, there are included the case when it consists of the same kind of metal or alloy, the case when it consists of different kinds of metals or alloys, and other cases. In either case, the above metallization or alloy formation is effected. On the other hand, the same is the case for the connecting portion.
  • the connecting portion of the electroconductive member or the recording element may be a metal or an alloy at the contact portions of the both, and other portions may be under the state of, for example, a metal formulated with an inorganic material such as glass, etc., or a metal formulated with an organic material such as a resin, etc.
  • the surface of the portion to be connected may be also provided with a metal which can be readily formed into an alloy or a plating layer comprising an alloy.
  • the heating method there may be employed, in addition to the thermal pressure adhesion method, the internal heating method such as the sonication heating method, the high frequency induction heating method, the high frequency dielectric heating method, the microwave heating method, etc. and other external heating methods, or alternatively the above heating methods may be also used in combination.
  • the connecting portion is heated directly or indirectly to be connected.
  • the connecting portion of the recording element substrate and the electroconductive member of the electrical connecting member may be pressed together by a suitable means to effect connection.
  • the electrical connecting member and the recording element may be brought into a fitted state.
  • connecting method there is the connecting method by use of an adhesive. That is, there is the method in which the recording element substrate and the electroconductive member are connected through adhesion in at least a part thereof excluding the connecting portion.
  • the above connecting method may be used similarly.
  • connection of the driving element substrate it is preferable to effect freely detachable connection.
  • a means which can be connected freely detachably e.g. connection by pressurization
  • a means which can be connected freely detachably e.g. connection by pressurization
  • the metal layer or the aloy layer for the driving element may be made to have a melting point lower than that of the metal layer or the alloy layer for the recording element. That is, by making such a constitution, if it is heated to a temperature higher than the melting point of the metal layer or the alloy layer for the driving element, and lower than the melting point of the metal layer or the alloy layer for the recording element, only the driving element can be dismantled without exerting bad influence such as damage, etc. on the connecting portion of the recording element.
  • freely detachable connection also includes such connection.
  • the recording element unit and the ink jet unit have a film covering the surface of the electrical connecting member opposite to the recording element.
  • the surface can be protected from contamination such as with dust, etc., and also from oxidation of the electroconductive member exposed at this surface, whereby connection with the driving element can be well effected.
  • any film which can effect such action may be available but one comprising an organic material may be preferred.
  • polyethylene films, polyethylene terephthalate films, etc. may be employed. It is preferable to perform covering by such film in preparing the electrical connecting member. Of course, covering may be also done after preparation.
  • the recording element in the present invention there may be employed, for example, an element actuating by heat energy (heat-generating element) and other recording elements such as piezoelectric element.
  • heat energy heat-generating element
  • other recording elements such as piezoelectric element.
  • the connecting portions of the recording element are arranged in a number more by at least one than the necessary number.
  • the connecting portions of the driving element are arranged on the driving element substrate in the necessary number or in a number more by at least one than the necessary number.
  • connection with the electrical connecting member can be done surely without performing registration or by performing it without accompaniment of so high precision.
  • the recording element unit in the present invention has the electrical connecting member and the recording element substrate, and the ink jet unit is constituted of the above recording element unit having a liquid pathway formed on the recording element substrate.
  • the shape, dimension, etc. of the liquid pathway may be any desired ones.
  • the recording element driving unit and the ink jet driving unit are formed, respectively.
  • the ink jet device has the above ink jet driving unit and a means for mounting the ink jet driving unit.
  • the type of the ink jet device may be either the so called serial scanning type (printing is performed while the print head moves reciprocally in the lateral direction relative to paper) or the full line type (a print head of one line in the lateral direction is used).
  • serial scanning type printing is performed while the print head moves reciprocally in the lateral direction relative to paper
  • full line type a print head of one line in the lateral direction is used.
  • the full line type is preferred.
  • connection with the recording element or the driving element is effected by use of the electrical connecting member as described above, it becomes possible to permit connecting portions with recording elements or driving elements to exist at a high density, whereby the number of the connecting portions can be increased to enable higher densification. This also enables miniaturization of even a lengthy unit.
  • the electrical connecting member can be made thinner, and also from this aspect, the unit can be made thinner.
  • the amount of the metal member to be used for electrical connecting member is small, cost reduction becomes possible even if expensive gold may be used as the metal member.
  • connection becomes possible without performing registration or without requiring high precision in performing registration, if any, even in the case of a lengthy unit.
  • the ink jet driving unit is a bubble jet system
  • registration can be done with difficulty because higher density wiring is demanded, but according to the present invention, registration can be done with extreme ease even in the case of such high density wiring.
  • the recording element substrate and the driving element substrate can be connected freely detachably, whereby the driving element substrate can be separated easily, and hence can be also exchanged easily.
  • the base surfaces of the recording element substrate and the driving element substrate can be formed on the same plane, working during mechanical fixing can be made easier.
  • the recording element substrate and the driving element substrate can be connected freely detachably, whereby the driving element substrate can be separated easily, and hence can be exchanged easily.
  • the recording element substrate and the driving element substrate can be formed on the same base stand, preparation of the recording element driving unit can be made easier, and further working during mounting of the recording element driving unit onto the recording device can be made easier.
  • the recording element substrate and the driving element substrate can be connected freely detachably, whereby the driving element substrate can be separated easily, and hence can be exchanged easily.
  • the respective electrical connecting members can be small, and even when used for a lengthy unit, the precision of the pitch of the electroconductive members is not required to be so high.
  • the ink jet driving unit is a bubble jet system
  • higher density wiring is demanded and therefore the pitch of the electroconductive members is required to have high precision and is also greatly influenced by thermal expansion, but in the present invention, there is no such problem even in the case of such high density wiring.
  • FIG. 3A to 3B A first example of the present invention is described by referring to Figs. 3A to 3B.
  • the recording element unit 800 is described by referring to Fig. 3A.
  • the recording element unit 800 of this Example has a holding member 111 formed by use of an electrical insulating material; an electrical connecting member 125 having a plurality of electroconductive members 107 embedded in said holding member 111, with one end of said electroconductive member 107 being exposed on one surface of said holding member 111 and the other end of said electroconductive member 107 being exposed on the other surface of said holding member 111; and a recording element substrate having a plurality of recording elements (heat-generating elements) 603 more by at least one than the necessary number arranged thereon; one end of the electroconductive member 107 exposed on one surface of said electrical connecting member 125 being connected to said recording element 603.
  • the heat-generating element 603 is formed of a heat-generating member 600 and electrodes 602 formed in a line in this Example.
  • the recording element driving unit 810 of this Example has a holding member 111 formed by use of an electrical insulating material; an electrical connecting member 125 having a plurality of electroconductive members 107 embedded in said holding member 111, with one end of said electroconductive member 107 being exposed on one surface of said holding member 111 and the other end of said electroconductive member 107 being exposed on the other surface of said holding member 111; and a recording element substrate 184 having recording elements 603 arranged thereon; a driving element substrate 104 having driving elements having connecting portions more by at least one than the necessary number arranged thereon; one end of the electroconductive member 107 exposed on one surface of said electrical connecting member 125 being connected to said recording element 603; and the other end of the electroconductive member 107 exposed on the other surface of said electrical connecting member 125 being connected to the connecting portion of said driving elements.
  • the ink jet unit of this Example has a holding member 111 formed by use of an electrical insulating material; an electrical connecting member 125 having a plurality of electroconductive members 107 embedded in said holding member 111, with one end of said electroconductive member 107 being exposed on one surface of said holding member 111 and the other end of said electroconductive member 107 being exposed on the other surface of said holding member 111; and a recording element substrate 184 having a plurality of recording elements 603 more by at least one than the necessary number arranged thereon; said recording element substrate 184 having a liquid pathways communicated to discharging openings for discharging ink formed by use of a member 401 thereon.
  • the ink jet driving unit 29 of this Example has; an electrical connecting member 125 having a holding member 111 formed by use of an electrical insulating material and a plurality of electroconductive members 107 embedded in said holding member 111, with one end of said electroconductive member 107 being exposed on one surface of said holding member 111 and the other end of said electroconductive member 107 being exposed on the other surface of said holding member 111; a recording element substrate 184 having recording elements 603 arranged thereon; and a driving element substrate 104 having a driving element 101 having connecting portions more by at least one than the necessary number arranged thereon; said recording element substrate 184 having liquid pathways communicated to discharging openings for discharging ink formed by use of a member 401 thereon; one end of the electroconductive member 107 exposed on one surface of said electrical connecting member 125 being connected to said recording element 603; and the other end of the electroconductive member 107 exposed on the other surface of said electrical connecting member 125 being connected to the connecting portion of said driving element 101.
  • the ink jet device of this Example has the ink jet driving unit 29 as described above and a means 26 for mounting said ink jet driving unit 29.
  • the serial scanning type is shown, but the full line type as shown in Fig. 20 is preferable as described above.
  • the electrical connecting member 125 is described by describing a preparation example of the electrical connecting member 125.
  • Fig. 4 shows a preparation example.
  • a 20 ⁇ m ⁇ metal wire 121 comprising a metal such as gold, etc. or an alloy is wound up around a rod 122 with a pitch of 40 ⁇ m, and after winding, the above metal wire 121 is embedded in a resin 123 such as of polyimide, etc. After embedding, the above resin 123 is cured. The cured resin 123 becomes an insulating material. Then, the product is cut by slicing at the position of the dotted line 124 to prepare an electrical connecting member 125.
  • the metal wire 121 constitutes the metal member 107 and the resin 123 constitutes the holding member (insulating material) 111.
  • the metal wires 121 are mutually electrically insulated with the resin 123. Also, one end of the metal wire 121 is exposed on the driving element substrate 104 side, and the other end on the recording element substrate 184 side. The exposed portions become respectively the connecting portions 105, 194 with the driving element substrate 104, and the recording element substrate 184.
  • the electrical connecting member 125 in this Example has the portion of the metal member 107 exposed which is protruded from the surface of the holding member (resin insulating material) 111.
  • Such electrical connecting member 125 can be prepared according to, for example, the following method.
  • both surface of the electrical connecting member prepared according to the method as described above may be etched until the metal wire 121 is protruded by about 10 ⁇ m from the polyimide resin 123.
  • the amount of the metal wire 121 protruded is made 10 ⁇ m, but any desired amount may be available.
  • the method for protruding the metal wire 121 is not limited to etching, but other chemical methods or mechanical methods may be employed.
  • a recording element substrate 184 is prepared.
  • the recording element substrate 184 has more recording elements than the necessary number arranged thereon as shown in the equivalent circuit diagrams of Figs. 7A and 7B.
  • the connecting portions 194 comprise Au.
  • the recording element substrate is connected to the electrical connecting member without particular registration.
  • connection was effected by metallization and/or alloy formation.
  • connecting may be effected by use of an adhesive.
  • the recording element unit is prepared according to the the steps as described above.
  • a recording element driving unit is prepared (Fig. 6).
  • the pitch of the connecting portions of the driving element substrate 104 in this Example is 63.5 ⁇ m.
  • the pitch of the connecting portions in the present invention is not particularly limited in effecting necessary connections even without performing strict registration, but in the electrical connecting member 125 of this Example, the pitch mutually between the metal members 107 is made narrower, and thus by choosing the connecting dimension of the recording element substrate 104, or the driving element substrate 184 and the connecting dimension of the electrical connecting member at adequate values, connection is possible without registration.
  • Connection of the driving element substrate may be preferably according to the freely detachable connecting method.
  • connection by way of metallization and/or alloy formation, by making the melting point of the alloy layer at the connecting portion 105 lower than that of the alloy layer at the connecting portion 109, only the driving element substrate can be made detachable as desired by heating to a temperature between the both melting points.
  • a solder with an eutectic composition of Sn:Pb weight ratio of 61.9%: 38.1% may be employed, and a solder with Sn:Pb weight ratio of 5%:95% for the connecting portion 109.
  • the ink jet unit and the ink jet driving unit are to be described. These units are prepared by forming a liquid pathway communicated to a discharging orifice for discharging ink on the recording element substrates of the recording element unit and the recording element driving unit as described above as shown in Figs. 3B and 3C.
  • Figs. 8A to 8C are diagrams for illustrating an example of the recording element driving unit according to the present invention.
  • Fig. 8A is a view seen from above the standard surface (the surface on which elements, etc. are mounted of the recording element driving unit of this Example, and
  • Fig. 8B a sectional view.
  • Fig. 8C is a diagram for illustration of the state in which a circuit substrate 2 and an electrical connecting member 3 are arranged on a pressure contact member 1.
  • 1 is a pressure contact member
  • 2 a circuit substrate
  • 3 an electrical connecting member
  • 4 a recording element substrate
  • 5 a driving element substrate
  • 6 driving element and 7 a base member.
  • the pressure contact member 1 is fixed on the substrate 7 on the both ends in the lengthy direction by such method as screwing, etc. as shown in Fig. 8A, and through the pressure, the circuit substrate arranged between the pressure contact member 1 and the base member 7, the electrical connecting member and the recording element substrate, and the circuit substrate, the electrical connecting member and the driving element substrate are mutually pressure contacted with each other.
  • the upper electrical connecting member 3 is electrically conducted to the lower electrical connecting member 3 through the circuit substrate 2, and therefore the recording element substrate 4 and the driving element substrate 5 are electrically conductive to each other (see Fig. 8B).
  • a recording element driving unit can be formed on one base member and therefore preparation of the recording element driving unit can be made easier, and also mounting of the recording element driving unit onto a recording device can be made easier.
  • Figs. 9A and 9B are diagrams for illustration of a second example of the recording element driving unit of the present invention.
  • Fig. 9A is a view as seen from above the standard surface of the recording element driving unit of this Example, and Fig. 9B is a sectional view.
  • Example 2 The difference of this Example from Example 2 is that the interval between the electrodes on the recording element substrate is smaller.
  • the interval between the electrodes on the recording element substrate can be made smaller than connection by way of wire bonding.
  • an ink jet recording unit by use of one having liquid pathways communicated to discharging openings for discharging ink formed on the recording element substrate, an ink jet recording unit can be obtained.
  • an ink jet recording device can be obtained.
  • Figs. 10A and 10B are diagrams for illustration of an example of the recording element driving unit according to the present invention.
  • Fig. 10A is a view as seen from above the standard surface of the recording element driving unit of this Example, and Fig. 10B a sectional view.
  • Example 2 The difference of this Example from Example 2 and Example 3 resides in making the shape of the pressure contact member 1 to that as shown in Fig. 10B and changing the position of fixing by screwing, etc. By forming such constitution, there is no fear of warping of the pressure contact member 1 even when the number of recording elements mounted on the recording element driving unit is many (that is when the length in the lengthy direction of the recording element driving unit is long).
  • an ink jet recording unit by use of one having liquid pathways communicated to discharging openings for discharging ink formed on the recording element substrate, an ink jet recording unit can be obtained.
  • an ink jet recording device can be obtained.
  • Figs. 11A and 11B are diagrams for illustration of an example of the recording element driving unit according to the present invention.
  • Fig. 11A is a view as seen from above the standard surface of the recording element driving unit of this Example, and Fig. 11B a sectional view.
  • the parts attached with the same symbols as in Figs. 10A and 10B indicate the same parts as in Fig. 10.
  • 9 is a connector, 11 a rubber for pressure contact, 12 a flexible cable and 13 a flexible cable reinforcing plate.
  • Example 3 The difference of this Example from Example 3 resides in providing newly a connector for inputting image signals, etc. into the recording element driving unit and a means for connecting electrically the driving element substrate to the connector (flexible cable, etc.), and further providing an elastic member for pressure contacting the flexible cable, etc. with the driving element substrate (rubber, etc.).
  • an ink jet recording unit by use of one having liquid pathways communicated to discharging openings for discharging ink formed on the recording element substrate, an ink jet recording unit can be obtained.
  • an ink jet recording device can be obtained.
  • Figs. 12A and 12B are diagrams for illustration of an example of the recording element driving unit according to the present invention.
  • Fig. 12A is a sectional view of the recording element driving unit according to this Example, and
  • Fig. 12B a view as seen from above the standard surface (the surface on which elements, etc. are mounted).
  • 31 is a pressure contact member, 32 a driving element substrate, 33 an electrical connecting member, 34 a driving element, 35 a recording element substrate, 36 a circuit substrate, 37 a base member and 38 a connector.
  • the recording element substrate and the circuit substrate used had the same thickness.
  • the pressure contact member 31, as shown in Fig. 12A, is fixed on the substrate 37 according to such method as screwing, etc., and through the pressure, the driving element substrate the electrical connecting member and the recording element substrate and the driving element substrate, the electrical connecting member and the circuit substrate, arranged between the pressure contact member 31 and the base member 37, are mutually pressure contacted with each other.
  • the recording element substrate 35 and the driving element substrate 32 are electrically connected through the electrical connecting member 33 on the right side, and the driving element substrate 32 and the circuit substrate 36 electrically connected through the electrical connecting member 33 on the left side. Also, the circuit substrate 36 and the connector 38 are electrically connected, and image signals, etc. can be inputted externally.
  • an ink jet recording unit by use of one having a liquid pathway communicated to a discharging opening for discharging ink formed on the recording element substrate, an ink jet recording unit can be obtained.
  • an ink jet recording device can be obtained.
  • Fig. 13 is a sectional view for illustration of an example of the recording element driving unit according to the present invention.
  • the difference of this Example from Example 6 resides in that the thickness of the base member is thick at the portion in contact with the recording element substrate and the circuit substrate and thin at the portion confronting the driving element.
  • the driving element can be mounted freely without being affected by the thickness of the driving element.
  • an ink jet recording unit by use of one having a liquid pathway communicated to a discharging opening for discharging ink formed on the recording element substrate, an ink jet recording unit can be obtained.
  • an ink jet recording device can be obtained.
  • Figs. 14A and 14B are diagrams for illustration of the recording element unit according to the eighth example of the present invention (the case of using a plurality of electrical connecting members).
  • Fig. 14A shows the recording element substrate before provision of a plurality of electrical connecting members according to the present invention
  • Fig. 14B the recording element substrate after provision of a plurality of electrical connecting members according to the present invention (namely the recording element unit).
  • 44 is a recording element substrate
  • 54 and 55 are electrodes
  • 43 is an electrical connecting member.
  • the electrodes 55 may be arranged at equal intervals, but more preferably arranged so as to form groups each of a certain number as shown in Fig. 14A. This is because the electrical connecting members 43 can be arranged more easily.
  • the number of the electrodes 55 constituting each electrode group may be determined in view of the pitch of the electrodes 55, the balance between the pitch precision of electroconductive members 43 and the production cost.
  • electroconductive members 43 are arranged in Fig. 14B to form the recording element unit according to this Example.
  • the respective electrical connecting members 43 may be mutually contacted with each other, or not.
  • the interval of the electrical connecting members 43 may be determined in view of the difference in thermal expansion coefficient, etc. between the recording element substrate 44 and the electrical connecting members 43.
  • the material of the driving element substrate to be used may be preferably of the same material as the recording element substrate, or one with little difference in thermal expansion coefficient. For, if a material with great difference in thermal expansion coefficient is used, there is not influence on the above former effect, but the above latter effect may be lost.
  • Fig. 15 and Fig. 16 are diagrams for illustration of the recording element unit according to the ninth example of the present invention. That is, this Example has grooves provided in electrical connecting members. The difference between Fig. 15 and Fig. 16 is that the positions where grooves are provided are different.
  • the number of elecrodes constituting the respective electrode groups of the electrical connecting member of this Example, the intervals between the electrode groups, the number of grooves, the size of the groove do not relate to the essence of the present invention, but may be determined freely depending on the practice conditions as a matter of course.
  • the holding member according to this Example may be one having electrical connecting members as shown in the above Example 8 secured on a lengthy plate, or alternatively formed initially integrally, or may be formed according to other methods.
  • grooves are formed in the direction vertical to the recording element substrate, but the grooves may be also horizontal to the recording element substrate, and holes may be also formed in place of grooves, and it is also evident that grooves and holes may be used in combination.
  • Example 8 and Example 9 the recording element unit according to the preset invention has been described.
  • the recording element driving unit, the ink jet unit, the ink jet driving unit and the ink jet device according to the present invention are to be described.
  • the recording element driving unit according to the present invention is formed by connecting a driving element substrate to the recording element unit prepared as described above and takes, for example, a constitution as shown in Fig. 17.
  • 43 is the recording element
  • 44 the recording element substrate
  • 45 the driving element substrate
  • 46 the driving element.
  • the ink jet unit according to the present invention has liquid pathways communicated to discharging openings for discharging ink formed on the recording element unit prepared as described above, and the ink jet driving unit according to the present invention has a driving element substrate connected to this ink jet unit.
  • Fig. 18 shows an example of the ink jet unit and the ink jet driving unit according to the present invention.
  • 48 is the ink jet unit, 45 the driving element substrate and 46 the driving element.
  • Fig. 19 illustrates an example of the main part of the ink jet recording device according to the present invention.
  • the recording sheet 21 is conveyed by paper feeding rollers to sheet delivery rollers 23, 24 set up and down with a predetermined interval, and subjected to sheet delivery in the direction of the arrowhead A along the platen 22.
  • the above carriage 26 is driven in a reciprocal fashion by the carriage driving motor (not shown) through the belt transmission mechanism 27.
  • ink is discharged as a droplet through the discharging opening of the above ink jet driving unit toward the recording sheet 21 to effect recording thereon.
  • the liquid pathway of the ink jet driving unit has at, for example, its tip end a discharging opening formed as directed to the recording sheet 21.
  • ink is discharged from the discharging opening to permit an ink droplet to fly.
  • the symbol 28 shows schematically a restoration means including the cap for preventing defective discharging of ink from the discharging opening.
  • Fig. 20 shows another example of the ink jet recording device of the present invention.
  • the difference of this Example from the above ink jet recording device resides in that the ink jet driving unit 29 of this Example is provided with the recording elements corresponding to the recording width of the recording paper 21. Accordingly, the carriage is not required to be driven in a reciprocal fashion, whereby the mechanism can be simple and high speed recording is possible.
  • the effect of the present invention is enormous.
  • Fig. 21 is a schematic exploded perspective view showing an example of the ink jet unit and the ink jet driving unit according to the present invention.
  • the symbol 61 is a discharging opening, 62 an ink pathway communicated to the discharging opening 61, and 63 an ink chamber communicated to the ink channel 62.
  • the liquid pathway in this Example has an ink pathway 62 and an ink chamber 63.
  • the ink pathway 62 and the ink chamber 63 are formed by bonding the recording element substrate 184 in Fig. 21 (for better understanding of explanation, the length is drawn shorter), the wall forming member 64 and the covering member 65 mutually together.
  • heat-generating portions 67 of a heat-generating elements as the recording elements are provided corresponding to each ink pathway 62, and these heat-­generating portions 67 have electrodes (not shown in Fig. 21) arranged thereon.
  • the symbol 66 in Fig. 21 is an ink feeding inlet into the ink chamber 63.
  • Fig. 22 is a schematic appearance perspective view showing an example of the ink jet device according to the present invention.
  • the symbol 1000 is the main device, 1100 the power switch and 1200 the panel for operation.
  • the present invention will bring about excellent effects particularly in the recording head and the recording device of the bubble jet system among ink jet recording systems.
  • the liquid (ink) is discharged through the opening for discharging to form at least one droplet.
  • the driving signal is made a pulse shape, growth and shrinkage of bubbles can be effected instantly and adequately and therefore particularly excellent discharging of liquid (ink) can be accomplished, more preferably.
  • the pulse-shaped driving signal those as described in U.S. patents 4,463,359 and 4,345,262 are suitable. Further excellent recording can be done by employment of the conditions as described in U.S. Patent 4,313,124 of the invention concerning temperature elevation rate of the heat-acting surface.
  • the constitution of the recording head in addition to the combined constitution of discharging opening, liquid pathway, electrothermal transducer (linear liquid pathway or right angle liquid pathway) as disclosed in the respective specifications as described above, the constitutions by use of U.S. Patents 4,558,333 and 4,459,600 disclosing the constitution in which the heat-acting portion is arranged in a flexed region are also included in the present invention.
  • the present invention is also effect as the constitution based on Japanese Laid-open Patent Application No. 59-123670 which discloses the constitution having a common slit as the discharging portion of the electrothermal transducer to a plurality of electrothermal transducer or Japanese Laid-open Patent Application No. 59-138461 which discloses the constitution having the opening absorbing the pressure wave of heat energy corresponding to the discharging portion.
  • the recording head of the full line type having a length corresponding to the maximum recording medium width which can be recorded by the recording device
  • a constitution which fills its length by a combination of a plurality of recording heads as disclosed above or a constitution as one recording head integrally formed may be available, but the present invention can exhibit further effectively the effects as described above.
  • the present invention is also effective in the case when a recording head of the freely exchangeable chip type which enables electrical connection to the main device or feeding of ink from the main device when mounted on the main driver, or a recording head of the cartridge type provided integrally onto the recording head itself is used.
  • a restoration means for the recording head provided as the constitution of the recording device of the present invention is preferable because the effect of the present invention can be further stabilized.
  • Specific examples of these means may include capping means, cleaning means, pressurization or aspiration means, electricity-heat convertors, preliminary heating means separate from these or preliminary heating means according to a combination of these, and it is also effective for performing stable recording to perform preliminary discharging mode which performs another discharging separate from recording.
  • the recording mode of the recording device not only the recording only of black, etc. as the main color, but also the recording head may be integrally constituted or a plurality of recording heads may be combined, but the present invention is also very effective for a device equipped with at least one of complex color with different colors or full color by color mixing.
  • the present invention has been constituted as described above and therefore can give a number of effects as set forth below.
  • the electrical connecting member as described above is used and connected to the recording element or the driving element, it becomes possible to permit the connecting portions of the recording element or the driving element at high density, whereby the number of connecting portions can be increased to effect higher densification. This also enables miniaturiztion even of a lengthy unit.
  • electrical connecting members can be made thinner, and also from this aspect, the unit can be made thinner.
  • the amount of the metal member used for the electrical connecting member is small, cost reduction becomes possible even if expensive gold may be used as the metal member.
  • connection becomes possible without performing registration or without requiring registration of high precision even if registration may be performed.
  • the ink jet unit is the bubble jet system
  • registration can be done with difficulty because high density wiring is required, but according to the present invention, registration can be done with very ease even in the case of such high density wiring.
  • the recording element substrate and the driving element substrate can be connected freely detachably, and the driving element substrate can be easily separated and hence can be exchanged easily.
  • the driving element heat-generating element
  • the present invention also has the advantage that the unit as a whole can be exchanged, thus being capable of copying with such case.
  • the tolerance width in voltage drop is relatively narrower, and the degree of freedom of electrical wiring is not seldom limited.
  • the present invention can be very effective in accomplishing the technical requirement to provide discharging openings at high density and in a large number in such ink jet head of the bubble jet system.
  • recording element driving unit can be formed on one base member, preparation of the recording element driving unit can be made easier, and also mounting of the recording element driving unit onto the recording device can be made easier.
  • the present invention by setting the difference between the thickness of the base member at the portions in contact with the recording element substrate and the circuit substrate and that at the portion confronting the driving element as desired, a driving element even with great thickness can be freely mounted.
  • each electrical connecting member in connecting the recording element or the driving element by use of an electrical connecting member, by use of a plurality of small electrical connecting members juxtaposed, each electrical connecting member can be small and the precision of the pitch of electroconductive members is not required to be so high even when used for a lengthy unit.
  • the unit in juxtaposing the above plurality of small electrical connecting members, by taking sufficient intervals between the respective electrical connecting members, or by use of electrical connecting members having grooves and/or holes in the holding member, the unit can be prevented from warping through thermal expansion of the recording element substrate, the electrical connecting member, the driving element substrate, etc.
  • a recording element unit comprises an electrical connecting member having a holding member formed by use of an electrically insulating material and a plurality of electroconductive members arranged on said holding member, with one end of said electroconductive member being exposed on one surface of said holding member and the other end of said electroconductive member being exposed on the other surface of said holding member; and a recording element substrate having a plurality of recording elements more by at least one than the necessary number arranged thereon; one end of the electroconductive member exposed on one surface of said electrical connecting member being connected to said recording element.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP19890112127 1988-07-03 1989-07-03 Tintenstrahlaufzeichnungsvorrichtung Expired - Lifetime EP0349959B1 (de)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP16538688 1988-07-03
JP165386/88 1988-07-03
JP168194/88 1988-07-06
JP16819488 1988-07-06
JP63172295A JP2695441B2 (ja) 1988-07-11 1988-07-11 記録素子駆動ユニット並びにそれを用いたインクジェット駆動ユニット及びインクジェット記録装置
JP172294/88 1988-07-11
JP63172294A JP2825159B2 (ja) 1988-07-11 1988-07-11 記録素子駆動ユニット並びにそれを用いたインクジェット駆動ユニット及びインクジェット記録装置
JP172295/88 1988-07-11
JP182879/88 1988-07-22
JP63182879A JP2927432B2 (ja) 1988-07-22 1988-07-22 記録素子ユニット並びにそれを用いた記録素子駆動ユニット、インクジェットユニット、インクジェット駆動ユニット及びインクジェット装置
JP2273/89 1989-01-09
JP1002273A JP2798403B2 (ja) 1988-07-03 1989-01-09 記録素子駆動ユニット、インクジェット駆動ユニット及びインクジェット装置

Publications (3)

Publication Number Publication Date
EP0349959A2 true EP0349959A2 (de) 1990-01-10
EP0349959A3 EP0349959A3 (de) 1991-07-17
EP0349959B1 EP0349959B1 (de) 1997-12-10

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DE (1) DE68928480T2 (de)

Cited By (3)

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WO1991008899A1 (en) * 1989-12-18 1991-06-27 Eastman Kodak Company Bubble jet print head having improved multiplex actuation construction
EP0451727A2 (de) * 1990-04-06 1991-10-16 Sony Corporation Thermodruckkopf
EP0535557A1 (de) * 1991-09-30 1993-04-07 Rohm Co., Ltd. Druckkopf und Drucker, welcher diesen aufweist

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US4199637A (en) * 1975-11-26 1980-04-22 Shin-Etsu Polymer Co., Ltd. Anisotropically pressure-sensitive electroconductive composite sheets and method for the preparation thereof
US4729166A (en) * 1985-07-22 1988-03-08 Digital Equipment Corporation Method of fabricating electrical connector for surface mounting
US4740800A (en) * 1986-02-18 1988-04-26 Canon Kabushiki Kaisha Liquid jet recording head
JPS63299065A (ja) * 1987-05-29 1988-12-06 Toshiba Corp 電子部品の接続方法

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US4199637A (en) * 1975-11-26 1980-04-22 Shin-Etsu Polymer Co., Ltd. Anisotropically pressure-sensitive electroconductive composite sheets and method for the preparation thereof
US4729166A (en) * 1985-07-22 1988-03-08 Digital Equipment Corporation Method of fabricating electrical connector for surface mounting
US4740800A (en) * 1986-02-18 1988-04-26 Canon Kabushiki Kaisha Liquid jet recording head
JPS63299065A (ja) * 1987-05-29 1988-12-06 Toshiba Corp 電子部品の接続方法

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991008899A1 (en) * 1989-12-18 1991-06-27 Eastman Kodak Company Bubble jet print head having improved multiplex actuation construction
EP0451727A2 (de) * 1990-04-06 1991-10-16 Sony Corporation Thermodruckkopf
EP0451727A3 (en) * 1990-04-06 1992-02-12 Sony Corporation Thermal head
EP0535557A1 (de) * 1991-09-30 1993-04-07 Rohm Co., Ltd. Druckkopf und Drucker, welcher diesen aufweist
US5335002A (en) * 1991-09-30 1994-08-02 Rohm Co., Ltd. Printing head and printer incorporating the same

Also Published As

Publication number Publication date
EP0349959B1 (de) 1997-12-10
DE68928480D1 (de) 1998-01-22
EP0349959A3 (de) 1991-07-17
DE68928480T2 (de) 1998-04-23

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