EP0390338A1 - Method of manufacturing a substrate for a liquid jet recording head - Google Patents
Method of manufacturing a substrate for a liquid jet recording head Download PDFInfo
- Publication number
- EP0390338A1 EP0390338A1 EP90302165A EP90302165A EP0390338A1 EP 0390338 A1 EP0390338 A1 EP 0390338A1 EP 90302165 A EP90302165 A EP 90302165A EP 90302165 A EP90302165 A EP 90302165A EP 0390338 A1 EP0390338 A1 EP 0390338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recording head
- substrate
- jet recording
- ink
- electro
- 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
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 title claims description 53
- 239000011241 protective layer Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000011148 porous material Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 230000008093 supporting effect Effects 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 30
- 239000000945 filler Substances 0.000 claims description 19
- 239000011810 insulating material Substances 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000005530 etching Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 4
- 239000000976 ink Substances 0.000 description 55
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 34
- 238000007599 discharging Methods 0.000 description 19
- 239000010408 film Substances 0.000 description 19
- 229910052681 coesite Inorganic materials 0.000 description 17
- 229910052906 cristobalite Inorganic materials 0.000 description 17
- 239000000377 silicon dioxide Substances 0.000 description 17
- 235000012239 silicon dioxide Nutrition 0.000 description 17
- 229910052682 stishovite Inorganic materials 0.000 description 17
- 229910052905 tridymite Inorganic materials 0.000 description 17
- 239000000428 dust Substances 0.000 description 14
- 230000000875 corresponding effect Effects 0.000 description 12
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 8
- 230000007547 defect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000077 silane Inorganic materials 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 2
- 229910003862 HfB2 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910017083 AlN Inorganic materials 0.000 description 1
- 229910011255 B2O3 Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001182 laser chemical vapour deposition Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
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- 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
- B41J2/14088—Structure of heating means
- B41J2/14112—Resistive element
- B41J2/14129—Layer structure
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1601—Production of bubble jet print heads
- B41J2/1603—Production of bubble jet print heads of the front shooter type
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1601—Production of bubble jet print heads
- B41J2/1604—Production of bubble jet print heads of the edge shooter type
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1626—Manufacturing processes etching
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1626—Manufacturing processes etching
- B41J2/1628—Manufacturing processes etching dry etching
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1632—Manufacturing processes machining
- B41J2/1634—Manufacturing processes machining laser machining
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1642—Manufacturing processes thin film formation thin film formation by CVD [chemical vapor deposition]
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1643—Manufacturing processes thin film formation thin film formation by plating
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1645—Manufacturing processes thin film formation thin film formation by spincoating
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1646—Manufacturing processes thin film formation thin film formation by sputtering
Definitions
- the liquid jet recording method disclosed in the above Gazzette can not only be very effectively applied to the so-called drop-on demand recording method, but also can be easily realized by providing the recording head unit with highly dense multiple orifices over the full line width thereof corresponding to the recording region of the recorded member and therefore, has an advantage that images of high resolution and high quality can be obtained at a high speed.
- the heat generating resistance layer 107 and electrodes 103 and 104 are patterned into a predetermined shape by etching. That is, in the other portions than the portion being constituted the heat generating region 102, they are patterned almost into one and the same shape, and in the portion, being constituted the heat generating region 102, the electrodes are not laminated on the heat generating resistance layer 107, but the heat generating resistance layer 107 constitutes a heat generating portion 111.
- the first upper protective layer 108 and the third upper protective layer 110 are laminated over the whole surface of the base plate 101, while the second upper protective layer 109 is patterned so as not to be laminated on the heat generating region 102.
- the third protective layer 110 is in contact with ink, and with regard to the defects of the film forming these layers, care must be particularly taken of insulativeness or the like.
- Pin-holes and dust in the film may be mentioned as the defects of the film, and with regard to pin-holes, for example, as shown in JP Laid-Open Patent Application No. 60-157872 (corresponding USP 4777494), could be dissolved by anode-oxidizing the ground of the film portion, but the entry of dust into the film could not be sufficiently dissolved.
- Another object of the present invention is to eliminate the problems as noted above and to provide a method of manufacturing a substrate for a liquid jet recording head which is free of the possibility of recording liquid permeating from a recess created by the short-circuited wiring portion of electrodes being cut to thereby corrode the wiring and which is high in reliability, a substrate manufactured by the method, a liquid jet recording head using the substrate, and a liquid jet recording apparatus having the head.
- the present invention brings about excellent effects particularly in a recording head, recording device of the bubble jet system among the ink jet recording system.
- any ink which is solid or softened at room temperature may also be used in the present invention.
- the ink jet recording apparatus it is a common practice to control the temperature of ink itself within a range of 30 to 70 °C, thus adjusting the viscosity of the ink to be within the stable ejection range. Accordingly any ink which is liquid upon applying a recording signal may be used. Furthermore, any ink which is liquefied upon application of thermal energy may also be used in the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
- This invention, as a typical manner of recording, relates to a method of manufacturing a substrate used as constitutional member for a liquid jet recording head which causes a condition change including the production of bubbles in liquid by heat energy, discharges the liquid from a discharge opening by the condition change to thereby form flying droplets, and causes the flying droplets to adhere to a recording surface to thereby accomplish recording of information such as characters and images, a substrate manufactured by the method, a liquid jet recording head formed by use of the substrate, and liquid jet recording apparatus having the haed.
- The non-impact recording methods have recently drawn more attention in that the production of noise during recording is negligibly small. Among them, the so-called ink jet recording method (the liquid jet recording method) which is capable of high-speed recording and moreover can effect recording on plain paper without requiring the special process of fixation is a very promising recording method, and various systems using it have heretofore been proposed and apparatuses which embody them have been desired, and some of them have been improved and commercialized and some are still now under the effort to put them into practical use.
- Among them, the liquid jet recording methods described, for example, in Japanese Laid-Open Patent Application No. 54-59936 (corresponding USP 4723129, 4740796) and German Laid-Open Patent Application (DOLS) No. 2843064 have a feature differing from that of the other liquid jet recording methods in that heat energy which is energy to be used for discharging liquid is caused to act on liquid to thereby obtain a motive force for liquid droplet discharge.
- That is, in the typical example of recording methods disclosed in the above-mentioned publications, liquid subjected to the action of the heat energy causes a condition change involving a steep increase in volume, and by an action force based on the condition change, a liquid is discharged as droplet from a discharge opening (hereinafter referred to as the orifice), for example, provided at the fore end of a recording head unit and flies and adheres to a recording medium, whereby recording of information is accomplished.
- The liquid jet recording method disclosed in the above Gazzette can not only be very effectively applied to the so-called drop-on demand recording method, but also can be easily realized by providing the recording head unit with highly dense multiple orifices over the full line width thereof corresponding to the recording region of the recorded member and therefore, has an advantage that images of high resolution and high quality can be obtained at a high speed.
- An embodiment of the recording head of an apparatus applied to the above-described recording system is provided with a liquid discharge portion having an orifice provided to discharge ink as droplet therethrough and an ink liquid path provided with a heat-acting portion as a portion communicating with the orifice and causing heat energy to be used for discharging ink to act on the ink, and an electro-thermal transducer provided corresponding to the heat-acting portion as means for generating the heat energy.
- A typical example of this electro-thermal transducer comprises a pair of electrodes, and a heat generating resistance layer connected to these electrodes and a heat generating region (a heat generating portion) being constituted at a position corresponding to the portion between the electrodes. The heat generating resistance layer and electrodes are generally formed in the surface portion of the base plate of the ink jet recording head as a layer. An example of the prior-art construction of the base plate in which such an electro-thermal transducer is formed is shown in Figures 1A and 1B of the accompanying drawings. The example of the prior art will hereinafter be described with reference to these figures.
- Figure 1A is a fragmentary plan view showing the vicinity of an electro-thermal transducer in a substrate (hereinafter also referred to as the base plate) constituting an ink jet recording head, and Figure 1B is a fragmentary cross-sectional view of a portion indicated by dot-and-dash line XY in Figure 1A.
- In these figures, the
base plate 101 is formed by alower layer 106, a heatgenerating resistance layer 107,electrodes protective layer 108, a second upperprotective layer 109 and a third upperprotective layer 110 successively laminated on a supportingmember 105. - The heat generating
resistance layer 107 andelectrodes heat generating region 102, they are patterned almost into one and the same shape, and in the portion, being constituted theheat generating region 102, the electrodes are not laminated on the heatgenerating resistance layer 107, but the heat generatingresistance layer 107 constitutes aheat generating portion 111. The first upperprotective layer 108 and the third upperprotective layer 110 are laminated over the whole surface of thebase plate 101, while the second upperprotective layer 109 is patterned so as not to be laminated on theheat generating region 102. - The material to be used for forming each layer provided in the surface portion of the base plate formed as described above is suitably chosen based on characteristics such as heat-resisting property, liquid-resisting property, heat conductivity and insulativeness required corresponding to respective portion of layers. The main function of the first upper
protective layer 108 in the above-described example of the prior art is to keep the insulativeness between thecommon electrode 103 and theselected electrode 104, the main function of the second upperprotective layer 109 is to prevent the permeation of liquid and resist the liquid, and the main function of the third upperprotective layer 110 is to reinforce the liquid-resisting property and mechanical strength. - Now, of the first and third
protective layers protective layer 110 is in contact with ink, and with regard to the defects of the film forming these layers, care must be particularly taken of insulativeness or the like. Pin-holes and dust in the film may be mentioned as the defects of the film, and with regard to pin-holes, for example, as shown in JP Laid-Open Patent Application No. 60-157872 (corresponding USP 4777494), could be dissolved by anode-oxidizing the ground of the film portion, but the entry of dust into the film could not be sufficiently dissolved. - That is, in the ink jet system in which heat is caused to act, the first and third
protective layers - In the case of a base plate on which about twenty-four heater portions for discharging are formed, the probability with which the base plate becomes unsatisfactory due to the entry of dust does not become extremely high and therefore, there will be a little problem if base plate entered dust is dealt with as unsatisfactory one, but in the case of, for example, a base plate on which one thousand or more heater portions for discharging are formed, the entry of dust into a base plate may become great and therefore many problems cause. In either case due to the entry of dust in the film durability of the head itself may become bad. That is, if dust is present in the film, the dust will separate from within the film due to the action force during the extinction of a bubble for discharging ink and it will provide a pin-hole. The ink may come into such pin-hole and come into contact with the heater portion for discharging and react thereto, whereby the heater portion for discharging may be disconnected.
- Thus, the presence of defects in the protective layers of the heat generating portion due to the entry of dust into the film, reduces the durability of the head remarkably. Again, in such a case, if the base plate is one on which for example, about twenty-four heater portions for discharging are formed, the probability with which the base plate becomes unsatisfactory is low and therefore, it will pose no problem in terms of yield to regard base plate entered dust as being unsatisfactory, but in the case of, for example, a base plate on which one thousand or more heater portions for discharging are formed, the probability of heater portions for discharging which suffer from the entry of dust into a base plate will become great and if all these are regarded as being unsatisfactory, it will cause a reduction in yield.
- On the other hand, when in the liquid jet recording head as described above, short-circuiting has occurred between wirings during the manufacturing process, the short-circuited wiring portion has been cut by the use of a laser beam to thereby separate the wirings from each other, but when a laser beam is thus used, as shown in Figures 2A-1 and 2B-1 of the accompanying drawings, a damage has been imparted to the heat
generating resistance layer 202 on thesupport member 201 of the substrate for recording head to form a large hole (recess) 206. Then, in order to protect the wirings from recording liquid (ink), an upperprotective layer 204 is formed near thewirings 203 by a film making method such as the sputtering method, but in the location of thislarge hole 206, thewiring 203 could not be sufficiently covered with the upperprotective layer 204. - Therefore, as indicated by arrow K in Figure 2B-2 of the accompanying drawings, during the use, the ink has sometimes permeated into the portion in which the
hole 206 has been formed to thereby corrode theelectrodes 203, and finally this has sometimes led to the disconnection of the wirings. Thereference numeral 205 designates that portion of the electrode which has been corroded by the ink. - So, an attempt has been made to further provide a second upper protective layer on the
protective layer 204, but in the case of such a large hole 206 (usually having a depth of 1 µm or more), bubbles have collected there or have been repelled by the protective film, and it has been the case that the wirings cannot be covered well even with the second upper protective layer. Also, aluminum has heretofore been generally used as the material for the wirings, and in order to prevent the above-described corrosion, attempts have been made to find out other electrically conductive materials than aluminum, but there has not been yet found out anticorrosive conductive materials optimum in respect of manufacturing cost, workability and resistivity characteristic. - Thus, heretofore, it has happened that the ink permeates from the portion in which the wirings have been cut by a laser beam and the wirings are corroded and thereby disconnected, and this has sometimes reduced the reliability of the recording head.
- The present invention has been made in view of the above-noted problems and an object thereof is to provide a method of manufacturing a substrate for an ink jet recording head in which pores created in the protective layer of an electro-thermal transducer generating heat energy to be used for discharging ink are filled with another protective material, whereby the durability of the recording head can be increased and the yield of manufacture thereof can be improved, a substrate manufactured by the method, a liquid jet recording head formed using the substrate, and a liquid jet recording apparatus having the head.
- Another object of the present invention is to eliminate the problems as noted above and to provide a method of manufacturing a substrate for a liquid jet recording head which is free of the possibility of recording liquid permeating from a recess created by the short-circuited wiring portion of electrodes being cut to thereby corrode the wiring and which is high in reliability, a substrate manufactured by the method, a liquid jet recording head using the substrate, and a liquid jet recording apparatus having the head.
- Still another object of the present invention is to provide a method of manufacturing a substrate for an ink jet recording head having an electro-thermal transducer disposed on a supporting member and generating heat energy available to discharge ink, and a protective layer laminated over the electro-thermal transducer to protect the electro-thermal transducer from the ink, characterized by the step of filling pores created in the protective layer with a protective material.
- According to the above-described construction, the insulation between the ink and the electro-thermal transducer is accomplished reliably.
- Yet still another object of the present invention is to provide a method of manufacturing a substrate for a liquid jet recording head provided with a support member and an electro-thermal transducer provided on the support member and having a heat generating resistance layer and electrodes connected to the heat generating resistance layer, characterized by the steps of cutting the short-circuited wiring portion of the electrodes, embedding a filler into a recess created in the support member by the cutting, and providing a protective layer on the embedded filler and the electrodes.
- In the present invention, a filler is embedded into a recess created in the support member by cutting the short-circuited wiring portion of the electrodes by a laser beam or the like, whereby the great level difference of the recess is eliminated, and a protective layer is provided on the embedded filler and the electrodes so that the covering property of the protective layer may be improved and therefore, the permeation of recording liquid into the electrodes can be eliminated to thereby prevent the corrosion of the electrodes. Also, an insulating material is used as the embedded filler, whereby the reliability of the recording head during the long-term use thereof in the recording liquid can be improved.
-
- Figures 1A and 1B are a top plan view and a cross-sectional view, respectively, showing an embodiment of the construction of a base plate for ink jet head.
- Figures 2A-1, 2A-2 and 2B-1, 2B-2 are perspective views showing main portion of an embodiment of ink jet apparatus of the present invention.
- Figures 3A and 3B are a top plan view of a base plate according to an embodiment of the present invention and a cross-sectional view, respectively, taken along line X-Y in the plan view.
- Figures 4 to 6 are cross-sectional views showing an embodiment of the present invention and illustrating the process of filling a pore.
- Figures 7 to 10 are cross-sectional views showing another embodiment of the present invention and illustrating the process of filling a pore.
- Figures 11A-1, 11A-2, 11A-3, 11A-4 and 11B-1, 11B-2, 11B-3, 11B-4 are plan views and cross-sectional views, respectively, showing the steps of an embodiment of the present invention.
- Figure 12 is a fragmentary perspective view of a recording head according to an embodiment of the present invention.
- Figure 13 is a perspective view of a recording head according to another embodiment of the present invention.
- Figure 14 is cross-sectional view showing technical problem in manufacturing process of substrate for ink jet head according to the prior art.
- Some embodiments of the present invention will hereinafter be described in detail with reference to the drawings.
- Figures 3A and 3B are a top plan view and a side cross-sectional view, respectively, of a base plate (also called a substrate) for a recording head according to an embodiment of the present invention. In these figures, feature elements similar to those shown in Figures 1A and 1B are given similar reference numerals and need not be described. In Figures 3A and 3B, on a lower layer comprising SiO₂ on which a supporting
member 105 comprising Si is formed, a heat generating resistance member, a layer comprising HfB₂ and Al conductive layer to form electrode are formed by the use of the vacuum thin film making technique. Subsequently, the patterns of a heatgeneraitng resistance member 102 andelectrodes protective layer 108 formed of SiO₂ is formed with a thickness of 0.5 µm by sputtering. - After the first
protective layer 108 has been formed, the base plate is inspected by means of an optical microscope, and the base plate having adefect 112 in theprotective layer 108 for the heat generatingresistance member 102 is extracted. This extracted base plate is then placed into a powerful ultrasonic wave tank, and dust (foreign substance) in thedefect 112 is removed. The result is shown in Figure 4, wherein thereference character 112A designates the pore from which the foreign substance has been removed. - Then, in order to fill a filler in this pore, the base plate is placed into a vacuum chamber and silane (SiH₄) and NO₂ are poured thereinto to provide an atmosphere of 1 Torr. Subsequently, a laser beam is applied to the
pore 112A, and in this portion, silane (SiH₄) and NO₂ are caused to react to each other. As a result, as shown in Figure 5, afiller 113 comprising SiO₂ is accumulated in thepore 112A. The amount of SiO₂ accumulated in the pore is adjusted by adjusting the application time of the laser beam. When the filling of the pore is completed, upperprotective layers - As another example of filling the pore, there is a method as shown below.
- As shown in Figure 7,
SiO₂ layer 116 is formed into film having a thickness of 0.5 µm on the base plate as shown in Figure 4 by sputteirng. Resist 114 (OFPR 800; trade name, manufactured by TOK Co., Ltd.) is then applied with a thickness of 4 µm by spin coat. A pattern having awindow 114A formed corresponding to the pore is formed by the photolithography technique. Further, resist 115 (OFPR 800; trade name, manufactured by TOK Co., Ltd.) is applied with a thickness of 1 µm by spin coat. The thickness of the resist 115 applied later is smaller than the thickness of the resist 114 applied earlier and therefore is not flattened, but assumes a shape as shown in Figure 8. - Thereafter, CF₄ and H₂ are poured at a ratio of 1 : 1 by the use of a reactive ion etching apparatus, and etching is effected at a power of 400 W. At this time, the etching speed of the resist is 500 Å/min. and that of SiO₂ is 500 Å/min. and therefore, the resist and SiO₂ are etched at an equal speed. By this etching, that portion of the heat generating resistance member to which the resist has been applied is such that the thickness of
SiO₂ 116 is 0.5 µm, whereas the thickness of the resist 115 is 1 µm and therefore, the surface formed by etching becomes flat and accordingly, the resist is etched while keeping its original shape. At a point of time whereat the resist is no longer etched in said portion of the heat generatingresistance member 102, etching is terminated. As a result, the shape of the base plate becomes such as shown in Figure 9. Subsequently, the resists 114 and 115 are peeled off, and a secondprotective layer 109 formed of organic polyimide is formed as a protective layer forelectrodes protective layer 110 by sputtering, to thereby provide such a shape as shown in Figure 10. - The result of the discharge durability test of a recording head having the shape as shown in Figure 12 made by the use of the substrate formed in the manner described above will be shown below.
- As a comparative example, use was made of a recording head constructed of a base plate having a defect of about 3 µm diameter. Also, as the applied pulse, use was made of a rectangular pulse having a frequency of 2 kHz and a pulse width of 10 µs, and the applied voltage was 1.2 times as great as the voltage value for ordinary discharge.
- As a result, in the above mentioned two examples, the life of the recording head filled pore was more than 5 times that of the comparative example.
- As is apparent from the foregoing description, according to the present invention, the insulation between the ink and the electro-thermal transducer is reliably ensured.
- As a result, it becomes difficult for the disconnection or the like of the electro-thermal transducer to occur with the use of the recording head, and the durability of the recording head is extremely improved.
- Also, the defects of the base plate can be reduced and the yield is improved with a result that the manufacturing cost of the recording head can be reduced.
- Figures 11A-1 to 11A-4 and 11B-1 to 11B-4 show the steps of an embodiment of the present invention, and Figures 11A-1 to 11A-4 are plan views showing the course of the steps, and Figures 11B-1 to 11B-4 are corresponding cross-sectional views along line X - Y in Figures 11A-1 to 11A-4 which show the course of the steps. The
reference numeral 201 designates a support member for a substrate (also called a base plate) 201A for a recording head, thereference numeral 201B denotes a lower layer formed on the support member, thereference numeral 202 denotes a heat generating resistance layer provided on thelower layer 201B, thereference numeral 203 designates lead-out electrodes of aluminum connected to the heat generatingresistance layer 202, thereference numeral 204 denotes an upper protective layer formed of SiO₂ and provided on the heat generatingresistance layer 202 and theelectrodes 203, thereference numeral 206 designates a hole (a recess) created in thesupport member 201 by the cutting by a laser beam, thereference numeral 207 denotes a short-circuited wiring portion, and thereference numeral 208 designates a filler formed of an insulating material such as SiO₂ embedded in thehole 206. The electro-thermal transducer has at least the heat generatingresistance layer 202 and theelectrodes 203. - First, when manufacturing a recording head, the heat generating
resistance layer 202 formed of HfB₂ is laminated on thelower layer 201B formed of heat-oxidized SiO₂ on the Si (silicon)support member 201, and theelectrodes 203 of aluminum are deposited thereon by evaporation with a thickness of 5000 Å and are subjected to patterning and wiring. In this process, in Figure 11A-1, theportion 207 is short-circuited. - Subsequently, this short-circuited
wiring portion 207 is cut by a laser beam. When the short-circuitedwiring portion 207 was actually short three times by a laser beam having a wavelength of 1.06 µm, a beam intensity of 20 mJ/puls and a pulse width of 20 nS, the short-circuitedwiring portion 207 could be cut. Figure 11A-2 shows the state of that portion after cut, and it is seen that as shown in Figure 11B-2, ahole 206 is formed on thesupport member 201 at the cut portion thereof. - Subsequently, the insulating
material 208 as a filler is embedded into thishole 206. It is to be understood that the depth of thehole 206 is 2 µm. Therefore, the substrate 201 - 204 is placed into a vacuum chamber, not shown, and a mixture gas of silane (SiH₄) and nitrogen dioxide (NO₂) is caused to flow into the chamber to thereby provide an atmosphere of 1 Torr. When a laser beam is applied to thehole 206, SiH₄ (silane) and NO₂ react to each other in thishole 206, wherebySiO₂ 208 is accumulated therein. At that time, the application time of the laser beam is determined so that thehole 206 may be filled. The state in which thehole 206 has been filled with the insulatingmaterial 208 which is SiO₂ by such laser CVD (vapor phase growing method) is shown in Figure 11A-3. As shown in this figure, particularly thefiller 208 which is the insulating material is formed with said application time adjusted so that there may hardly be provided a level difference with respect to the height of theelectrodes 203 of the wiring. - Subsequently, the
layer 204 of SiO₂ as an upper protective layer is formed with a thickness of 1 µm on thefiller 208 and theelectrodes 203 by the sputtering method. As shown in Figures 11A-4 and 11B-4, theprotective layer 204 of SiO₂ sufficiently covers thehole 206 formed by cutting the short-circuited wiring portion of theelectrodes 203 by the laser beam and the lead-outelectrodes 203. - Figure 12 shows an example of a recording head made by forming discharge openings of recording liquid in the recording head substrate made in this manner, and actually mounting an integrated circuit thereon. In this figure, the
reference numeral 211 designates heat generating portions (heater portions), thereference numeral 402 denotes discharge opening, thereference numeral 403 designates an ink path wall forming liquid paths, thereference numeral 404 denotes a common liquid chamber, thereference numeral 405 designates a top plate, and thereference numeral 406 denotes ink supply ports. - The liquid jet recording head shown in Figure 12 was subjected to an ink permeation test for a long period of time, but there occurred no corrosion of the
electrodes 203 by the permeation of ink from the portion in which thehole 206 was created, i.e., the portion filled with thefiller 208. Accordingly, it could be confirmed that the reliability of the recording head can be enhanced by filling the recess created in that portion of the support member in which the short-circuited wiring portion was cut by the laser beam as in the present embodiment with a filler such as an insulating material. - The filler embedded into the hole may preferably be an insulating material, because there is the possibility of short-circuiting being caused between the wirings if the filler is not an insulating material. However, in the above-described embodiment, the insulating material embedded into the recess is SiO₂, but of course, another insulating material may be used. That is, at least one kind selected from SiO₂, Si₃N₄, SiC, Ta₂O₅, Al₂O₃, AlN, BN, B₂O₃, BeO, TiN, TiO₂ and WO₃ can be used as a preferred material. Also, in the above-described all embodiments, as shown in Figure 12, the direction of ink discharge is the surface direction of the
heater portion 211, but the present invention is also applicable to a liquid jet recording head as shown in Figure 13 wherein ink is discharged in a direction almost perpendicular to theheater portion 211. - As described above, according to the present invention, the recess formed in the support member of the substrate by cutting the short-circuited wiring portion by a laser beam or the like is filled with a filler and the great level difference of the recess is eliminated so that the covering property of the upper protective layer for protecting the wiring may be improved and therefore, the permeation of the recording liquid into the electrode wiring portion can be prevented and the wiring is not corroded with a result that disconnection does not occur and the long-term reliability of the recording head can be improved.
- Figure 14 is a schematic perspective view showing an example of the ink jet recording apparatus IJRA to which the present invention is applied. A carriage HC which engages with a
spiral groove 5004 of alead screw 5005 being rotatable through drivingforce transmitting gears drive motor 5013 has a pin (not shown) and is reciprocated in the directions of arrows a, b. 5002 is a paper holding plate and presses paper against a platen 5000 throughout the range of the movement of the carriage. 5007, 5008 are photocouplers, which are used as home position detecting means for detecting the presence of thelever 5006 of the carriage in the predetermined area to switch the direction of rotation of themotor 5013. 5016 is a member which holds acapping member 5022 for capping the front surface of a cartridge recording head IJC integrally provided with an ink tank. 5015 is a suction means for suction of the inside of the cap and effects suction recovery of the head through aopening 5023 in the cap. 5017 is a cleaning blade and 5019 is a member for moving the blade forward and afterward, the both being supported on amainbody supporting member 5018. The shape of the blade is not limited to that shown in the figure, and any one of well known blades may be employed for this example. 5012 is a lever for starting suction for suction recovery, which moves in conjunction with the movement of acam 5020 engaged with the carriage, whereby the driving force of the drive motor is transmitted by a conventional transmitting means such as clutch transfer and the like to be utilized for control. - The present invention brings about excellent effects particularly in a recording head, recording device of the bubble jet system among the ink jet recording system.
- As to its representative constitution and principle, for example, one practiced by use of the basic principle disclosed in, for example, U.S. Patents 4,723,129 and 4,740,796 is preferred. This system is applicable to either of the so called on-demand type and the continuous type. Particularly, the case of the on-demand type is effective because, by applying at least one driving signal which gives rapid temperature elevation exceeding nucleus boiling corresponding to the recording information on an electricity-heat convertors arranged corresponding to the sheets or liquid channels holding liquid (ink), heat energy is generated at the electricity-heat converters to effect film boiling at the heat acting surface of the recording head, and consequently the bubbles within the liquid (ink) can be formed corresponding one by one to the driving signals. By discharging the liquid (ink) through an opening for discharging by growth and shrinkage of the bubble, at least one droplet is formed. By making the driving signals into pulse shapes, growth and shrinkage of the bubble can be effected instantly and adequately to accomplish more preferably discharging of the liquid (ink) particularly excellent in response characteristic. As the driving signals of such pulse shape, those as disclosed in U.S. Patents 4,463,359 and 4,345,262 are suitable. Further excellent recording can be performed by employment of the conditions described in U.S. Patent 4,313,124 of the invention concerning the temperature elevation rate of the above-mentioned heat acting surface.
- As the constitution of the recording head, in addition to the combination constitutions of discharging orifice, liquid channel, electricity-heat converter (linera liquid channel or right angle liquid channel) as disclosed in the above-mentioned respective specifications, the constitution by use of U.S. Patent 4,558,333, 4,459,600 disclosing the constitution having the heat acting portion arranged in the flexed region is also included in the present invention. In addition, the present invention can be also effectively made the constitution as disclosed in Japanese Patent Laid-Open Application No. 59-123670 which discloses the constitution using a slit common to a plurality of electricity-heat converters as the discharging portion of the electricity-heat converter or Japanese Patent laid-Open Application No. 59-138461 which discloses the constitution having the opening for absorbing pressure wave of heat energy correspondent to the discharging portion.
- Further, as the recording head of the full line type having a length corresponding to the maximum width of recording medium which can be recorded by the recording device, either the constitution which satisfies its length by combination of a plurality of recording heads as disclosed in the above-mentioned specifications or the constitution as one recording head integrally formed may be used, and the present invention can exhibit the effects as described above further effectively.
- In addition, the present invention is effective for a recording head of the freely exchangeable chip type which enables electrical connection to the main device or supply of ink from the main device by being mounted on the main device, or for the case by use of a recording head of the cartridge type provided integrally on the recording head itself.
- Also, addition of a restoration means for the recording head, a preliminary auxiliary means, etc. 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 may include, for the recording head, capping means, cleaning means, pressurization or aspiration means, electricity-heat converters or another heating element or preliminary heating means according to a combination of these, and it is also effective for performing stable recording to perform preliminary mode which performs discharging separate from recording.
- Further, as the recording mode of the recording device, the present invention is extremely effective for not only the recording mode only of a primary stream color such as black etc., but also a device equipped with at least one of plural different colors or full color by color mixing, whether the recording head may be either integrally constituted or combined in plural number.
- In the examples of the present invention as set forth above, the use of liquid ink is discussed but any ink which is solid or softened at room temperature may also be used in the present invention. In the ink jet recording apparatus as described above it is a common practice to control the temperature of ink itself within a range of 30 to 70 °C, thus adjusting the viscosity of the ink to be within the stable ejection range. Accordingly any ink which is liquid upon applying a recording signal may be used. Furthermore, any ink which is liquefied upon application of thermal energy may also be used in the present invention. Such a type of inks include, for example, one which upon application of thermal energy depending on recording signal, is liquefied to be ejected in the form of ink droplet and one which is being solidified at the time of arriving at a recording medium. Such a type of inks are used for the purpose of, for example, positively utilizing thermal energy as the energy for phase change of ink from solid to liquid to prevent temperature elevation due to thermal energy or using an ink which is solidified when left to stand to prevent evaporation of ink. When such an ink is to be used, the ink may be held in the form of liquid or solid in recessed portions or through holes of a porous sheet while facing the electro-thermal transducer as shown in, for example, Japanese Laid-Open Patent Application Nos. 54-56847 and 60-71260. In the present invention, the most useful system for use of the inks as described above is the system effecting film boiling as described above.
Claims (12)
cutting the short-circuited wiring portion of said electrodes;
embedding a filler into a recess created in said support member by said cutting; and
providing a protective layer on said embedded filler and said electrodes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93201057A EP0559295B1 (en) | 1989-03-01 | 1990-02-28 | Method of manufacturing a substrate for a liquid jet recording head |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4883989A JPH02227255A (en) | 1989-03-01 | 1989-03-01 | Manufacture of base material for liquid jet recording head, base material manufactured thereby and liquid jet recording head using the base material |
JP4883889A JP2659238B2 (en) | 1989-03-01 | 1989-03-01 | Ink jet recording head, substrate for the head, and method of manufacturing the substrate |
JP48838/89 | 1989-03-01 | ||
JP48839/89 | 1989-03-01 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93201057.2 Division-Into | 1990-02-28 |
Publications (2)
Publication Number | Publication Date |
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EP0390338A1 true EP0390338A1 (en) | 1990-10-03 |
EP0390338B1 EP0390338B1 (en) | 1994-12-07 |
Family
ID=26389165
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90302165A Expired - Lifetime EP0390338B1 (en) | 1989-03-01 | 1990-02-28 | Method of manufacturing a substrate for a liquid jet recording head |
EP93201057A Expired - Lifetime EP0559295B1 (en) | 1989-03-01 | 1990-02-28 | Method of manufacturing a substrate for a liquid jet recording head |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP93201057A Expired - Lifetime EP0559295B1 (en) | 1989-03-01 | 1990-02-28 | Method of manufacturing a substrate for a liquid jet recording head |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP0390338B1 (en) |
AT (2) | ATE115051T1 (en) |
DE (2) | DE69014690T2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0698494A3 (en) * | 1994-08-26 | 1997-02-19 | Canon Kk | Method for producing substrate for ink jet recording head, ink jet recording head and ink jet recording apparatus |
EP0768182A2 (en) * | 1995-10-13 | 1997-04-16 | Canon Kabushiki Kaisha | A method for manufacturing an ink jet recording head, an ink jet recording head manufactured by such method, and an ink jet recording apparatus having such ink jet recording head mounted thereon |
CN1094425C (en) * | 1998-11-03 | 2002-11-20 | 三星电子株式会社 | Nozzle plate module of minitype ejector and method of manufacturing nozzle plate module |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0032087A2 (en) * | 1980-01-04 | 1981-07-15 | Thomson-Csf | Plate with a row of resistors with very small spacing |
US4536250A (en) * | 1983-04-20 | 1985-08-20 | Canon Kabushiki Kaisha | Method of making liquid jet recording head |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4707708A (en) * | 1985-09-27 | 1987-11-17 | Hitachi, Ltd. | Thermal print head |
-
1990
- 1990-02-28 DE DE69014690T patent/DE69014690T2/en not_active Expired - Fee Related
- 1990-02-28 EP EP90302165A patent/EP0390338B1/en not_active Expired - Lifetime
- 1990-02-28 EP EP93201057A patent/EP0559295B1/en not_active Expired - Lifetime
- 1990-02-28 AT AT90302165T patent/ATE115051T1/en not_active IP Right Cessation
- 1990-02-28 DE DE69027685T patent/DE69027685T2/en not_active Expired - Fee Related
- 1990-02-28 AT AT93201057T patent/ATE139940T1/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0032087A2 (en) * | 1980-01-04 | 1981-07-15 | Thomson-Csf | Plate with a row of resistors with very small spacing |
US4536250A (en) * | 1983-04-20 | 1985-08-20 | Canon Kabushiki Kaisha | Method of making liquid jet recording head |
Non-Patent Citations (2)
Title |
---|
IEEE CIRCUITS AND DEVICES MAGAZINE * |
PATENT ABSTRACTS OF JAPAN * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0698494A3 (en) * | 1994-08-26 | 1997-02-19 | Canon Kk | Method for producing substrate for ink jet recording head, ink jet recording head and ink jet recording apparatus |
US5660739A (en) * | 1994-08-26 | 1997-08-26 | Canon Kabushiki Kaisha | Method of producing substrate for ink jet recording head, ink jet recording head and ink jet recording apparatus |
EP0768182A2 (en) * | 1995-10-13 | 1997-04-16 | Canon Kabushiki Kaisha | A method for manufacturing an ink jet recording head, an ink jet recording head manufactured by such method, and an ink jet recording apparatus having such ink jet recording head mounted thereon |
EP0768182A3 (en) * | 1995-10-13 | 1998-12-02 | Canon Kabushiki Kaisha | A method for manufacturing an ink jet recording head, an ink jet recording head manufactured by such method, and an ink jet recording apparatus having such ink jet recording head mounted thereon |
US6315853B1 (en) | 1995-10-13 | 2001-11-13 | Canon Kabushiki Kaisha | Method for manufacturing an ink jet recording head |
CN1094425C (en) * | 1998-11-03 | 2002-11-20 | 三星电子株式会社 | Nozzle plate module of minitype ejector and method of manufacturing nozzle plate module |
Also Published As
Publication number | Publication date |
---|---|
DE69027685D1 (en) | 1996-08-08 |
ATE139940T1 (en) | 1996-07-15 |
DE69014690D1 (en) | 1995-01-19 |
EP0390338B1 (en) | 1994-12-07 |
ATE115051T1 (en) | 1994-12-15 |
DE69027685T2 (en) | 1996-11-28 |
DE69014690T2 (en) | 1995-05-04 |
EP0559295B1 (en) | 1996-07-03 |
EP0559295A1 (en) | 1993-09-08 |
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