JPS5863457A - Liquid jet recorder - Google Patents

Abstract

PURPOSE:To provide a high density multiorifice-designed liquid jet recorder easy to compactize by arranging a liquid discharge section equipped with a plurality of liquid dropplet discharge orifices and electro-thermo coversion body corresponding thereto, a drive control section, a wire section and the like on one substrate. CONSTITUTION:A plurality of discharge orifices adapted to discharge a liquid and form a flying liquid dropplet, a liquid discharge section 101 with electro- thermo conversion bodies corresponding to discharge orifices, a drive control section 103 for driving the electro-thermo conversion bodies of the liquid discharge section, a connection wire section 102 for electrically connecting each of the electro-thermo conversion bodies to the wire control section 103 and a matrix wire section 104 for transmitting signals to the drive control section 103 are arranged on one substrate 102 to construct a liquid jet recorder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid jet recording apparatus, and particularly to a liquid jet recording apparatus having a novel high-density multi-orifice structure.

The inkjet recording method (liquid jet recording method) is capable of high-speed recording in that the noise generated during recording is so small that it can be ignored, and it does not require any special processing to fix onto plain paper. Recently, it has been attracting attention because of its ability to record.

Among them, for example, German Publication (DOLS) 828
The liquid jet recording method described in Publication No. 43064 is as follows:
It has a different feature from other liquid jet recording methods in that thermal energy is applied to the liquid to obtain the motive force for ejecting droplets.

That is, in the recording method disclosed in the above-mentioned publication, the liquid subjected to the action of thermal energy undergoes a state change accompanied by a steep increase in volume, and the acting force based on the change in the liquid state causes the tip of the recording head to The feature is that liquid is ejected from the orifice to form flying droplets, and the droplets adhere to the recording member to perform recording.

In particular, the liquid jet recording method disclosed in DOLS 2845064 is a so-called drop-and-dem
Not only can it be applied extremely effectively to the recording method, but it can also easily realize a recording head with a full 1ine type recording head and high density multi-orifice, making it possible to obtain high-resolution, high-quality images at high speed. It has the characteristic of being

The recording head section of the apparatus applied to the above recording method is a part that communicates with an orifice provided for ejecting liquid, and where thermal energy acts on the liquid to eject droplets. It includes a liquid discharge section that has a liquid flow path that includes a heat acting section and an electrothermal converter that serves as a means for generating thermal energy.

This electrothermal converter includes a pair of electrodes, and a heat generating resistance layer connected to these electrodes and having a heat generating region (heat generating portion) between these electrodes.

As described above, according to the liquid jet recording method disclosed in the above-mentioned publication, there are many problems that arise when a full recording medium is provided with a high density multi-orifice.

For example, if the orifice density is 8 degrees, then [full 1ine on the short side of A4 size paper, that is, full 1ine at 210 threshold]
In the case of an ine type, the number of orifices would be 1680, and the same number of electrothermal converters, which are means for forming droplets, would need to be installed at high density, which would improve the reliability, productivity, and productivity of the device.
A possible solution arises in terms of tIi and tIi.

In addition, the 1680 orifices are extremely large in order to make the flight direction, flight speed, and droplet diameter of the droplets discharged from each orifice as desired, and to make these uniform among the orifices. Requires advanced processing technology and precision. Furthermore, it is necessary to satisfy the demands of the times to make the device itself more compact and to reduce the probability of failure.

The present invention has been made in view of the above points, and an object of the present invention is to provide a high-density multi-orifice liquid jet recording device that is highly reliable, highly productive, mass-producible, and easy to downsize. .

The liquid jet recording device of the present invention includes a large number of ejection orifices for ejecting liquid to form flying droplets, and an electrothermal converter disposed for each ejection orifice corresponding to the ejection orifice. A liquid discharge part equipped with: a drive control part for driving each electrothermal converter of the liquid discharge part; a connection wiring part that electrically connects each electrothermal converter and the drive control part: a drive control part It is characterized in that the IJ Lux Wire Section and IJ Lux Wire Section for sending signals are provided on one board.

The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows one of the preferred embodiments of the liquid jet recording device of the present invention.

The liquid jet recording apparatus 100 shown in FIG. 1 includes a liquid ejecting section 101. Connection wiring section 102. The drive control section 103 and the matrix wiring section 104 are arranged on one common board 105. Supply tubes 106-1 and 106-2 are connected to the liquid discharge section 101 for supplying liquid from a liquid storage tank (not shown) to the liquid discharge section 101. The drive control unit 105 has a configuration in which a drive circuit 108 is provided on a drive control unit board 107,
The matrix wiring section 104 fixedly installed on the common board 105 has a configuration in which a matrix wiring circuit is provided on the surface of the board 109.

The details of the front part (liquid discharge part, connection wiring part) of the apparatus shown in FIG. 1 will be explained with reference to FIGS. 2(a), (b), and (C).

Figure 2 (1) is a schematic exploded view, Figure 2 (b) is a schematic cross-sectional view showing the assembled state, and Figure 2 (C) includes the dash-dotted lines AB and CD in Figure 2 (b). FIG. 3 is a schematic cross-sectional view taken along a plane.

The liquid discharge part and the connection wiring part include a head substrate 201, a large number of electrothermal converters (not shown) formed on the surface thereof, and a head plate 201.
07, Ushiroate board 208, top board strip, and stacked board 21
0, an ink supply pipe 211, a common electrode plate 212, and threads 215 and 214 for protecting the connection portion.

The head substrate 201 has a thickness of 1 mm, a width of 27 mm, and a length of 12 mm.
It is a 2mm plate with good flatness, and M is mainly used, but other materials include Fe, stainless steel, and brass.

Metals and alloys such as copper and silicon, alumina, silica,
Inorganic compounds such as glass, polymeric compounds such as acrylic, vinyl chloride, epoxy, polycarbonate, and ABS, and flat plates subjected to surface treatment (for example, plating, enameling, etc.) may also be used.

The heater board 202 has a thickness of 0.4 mm and a width of 28 IIn+.
, the length is 28 mm, and a silicone wafer is mainly used, but alumina, glass, a metal plate with surface insulation treatment, etc. can also be used, but a flat plate with good flatness is preferable.

The grooved plate 204 has a thickness of 0.7 am, a width of 24 mm, a length of 1.5 mm, a width of 50 μm, a depth of 50 μm, and a length of 1.5 μm.
- 162 grooves are formed at intervals of 7 m.

Glass is mainly used because of its thermal and chemical stability and the ability to observe inside the grooves, but other materials include inorganic compounds such as alumina, silica, and silicone, and polymeric compounds with good heat resistance to ink (e.g., epoxy). ) does not necessarily need to be attached if the width of the plate 204 is sufficiently long and is equivalent to the heater board 202. The main material used is glass, but
In addition to this, aluminum.

Metal alloys such as iron, stainless steel and brass, inorganic compounds such as alumina and silica, and polymer compounds such as epoxy and ABS may be used. As shown in FIG. 2(C), 1
Ink relay chamber 206 that supplies ink to 62 nozzles
In order to form a
．． 6 (goods), width 17.0wm, length 2. Own)
208, top plate (thickness 0.7 m, width 24.0 m, length 6
．． 0 Peng) 209, stacked board (thickness 0.6 wi, width 2
4.0 mm, length 1.0 mm) 210 is provided.

The stacked plate 210 is provided to adjust the height between the ink relay chamber 206 and the grooved plate part, so that the thickness of the grooved plate 204 is 1.
It is not necessary if it is about 1 mm. Also, the knob plate 207. Ushiroate board 208. The top plate 2091 and the stacked plate 210 may be made of the same material and may be integrally molded. In addition, these materials are mainly glass; in addition, alumina,
Metals such as aluminum, iron, copper, stainless steel, epoxy, polycarbonate, silicone, ABC, acrylic, Teflon, etc. whose surfaces are chemically stabilized by treating the surface with inorganic compounds such as silica, plating, enamel finishing, resin coating, etc. Polymer compounds such as these can be used.

Pie from Ink Tank. One ink supply pipe 211-
1.211-2 is used.

The ink supply pipes 211-1 and 211-2 are! Figure 2 (C)
It has an inner diameter of 1.0 mm, an outer diameter of 1.3 mm, and a length of 6 mm, and is bent at an angle of about 60 to 45 degrees from the center.Stainless steel is mainly used as the material, but mechanically As long as they are strong and do not alter the quality of the ink, metal tubes with plating, enameling, or resin coating, glass tubes, and various polymer compounds may be used.

Ink supply pipes 211-1 and 211-2 are also connected to ink relay chamber 2.
06, the knob plate 207. Ushiroate board 2
When molding the 08° top plate 2091 and stacked plate 210F+, they may be made integrally.

The common electrode plate 212 is provided for the purpose of connecting common electrodes corresponding to each nozzle of the heater substrate 202 with wire bonding 217 to form the same electrode, as shown in FIG. 2(e)K. Thickness 0.5 mm, medium 28.011101
．． A gold-plated alumina plate with a length of 4.0 aun is mainly used, but other materials can also be used if the surface or the entire surface is coated with a material that allows wire bonding of Au, W or H, such as gold plating or aluminum evaporation. .

Further, the common electrode plate 212 has a lead portion provided for inputting a signal to a lead wire 216, the details of which are shown in FIGS. 6(a), 6(b), and 6(c).

Figure 85 (a) is a view from above, WJ6 figure (b) is the 6th
FIG. 6(a) is a sectional view, and FIG. 6(C) is a usage pattern.

The material is thickness 0-06m+, width 27.6va, length 64-
A polyimide film 601 with copper foil attached to the surface is used.

The copper foil portion is patterned by the number of individual electrodes, and the rad portion 502 and the crimp portion 506 are plated with gold. Other parts are covered with a cover film 504.

The pad support 5605 is used to reinforce the pad electrode portion 502 and is mainly made of copper foil. The signal input section 203 is finally used in the form shown in FIG. 6(e). That is, the crimp part 3
03 is bent, sandwiched with a polyimide film, glass, or epoxy composite 606, and then adhered with an adhesive and placed on the side opposite to the one pad portion 302.

The four pad portions 602 are bonded to the heater substrate 202, and wire bonded 218 as shown in FIG. 2(C).
The individual electrodes corresponding to each nozzle are drawn out to the crimp part 503 of the signal 0'' input line part 206.The holes 213 and 214 shown in Fig. 82 are both provided for the purpose of protecting the wire bonding part. Furthermore, a protective resin (mainly silicone resin and epoxy resin) is injected into the workpieces to mechanically and chemically protect the bonding part.Although not shown in the drawings, the workpieces 213 and 214 are provided with lids. You can do that.Waku213.21
For 4, a polymer compound such as polycarbonate, epoxy, or acrylic, or an inorganic compound such as glass, silica, or alumina is used.

FIG. 4(a) is a partial front view as seen from the orifice side to show a preferred embodiment of the liquid ejecting section of the liquid jet recording apparatus of the present invention, and FIG. a) K is a partial cross-sectional view taken along the dashed line XY.

The liquid discharge part 401 shown in the figure has an orifice 405 and a liquid flow path part 406 formed by joining a grooved plate 404 that is electrically connected to the surface thereof so as to cover it (a joining layer 415 is formed). It has a similar structure.

The liquid flow path section 406 has an orifice 405 at its end for discharging the liquid, and thermal energy generated by the electrothermal converter 402 acts on the liquid to generate bubbles, which expand and contract in volume. It has a heat acting part 407 that causes a rapid state change.

The heat acting part 407 is the heat generating part 40 of the electrothermal converter 402.
The bottom surface thereof is a heat acting surface 409 which is located at the top of the heat generating section 8 and comes into contact with the liquid of the heat generating section 408.

The heat generating section 408 is a lower layer 4 provided on the substrate 403.
10. Heat generating resistance layer 411 provided on the lower layer 410
, and an upper layer 412 provided on the heating resistance layer 411. The heating resistance layer 411 is provided with electrodes 413 and 414 on its surface for supplying electricity to the layer 411 in order to generate heat. The electrode 413 is an electrode common to the heat generating section of each liquid discharging section, and the electrode 414 is a selection electrode for selectively generating heat in the heat generating section of each liquid discharging section. It is provided along the flow path.

FIG. 5 shows a fully multi-layered liquid jet recording device 500 of the 4th version, in which a total of 16 units of the liquid jet device shown in FIG. 1 are provided on both surfaces of a fully multi-board 5010. (6 units on the bottom and 7 units on the top).

Liquid injection device unit) 502-1-J502-13
Each ζ ink supply tube 503-1.505-2
(Only 502-1 is marked with a symbol) is connected to the ink tank 504, and each unit is supplied with ink from the ink tank.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the configuration of a preferred embodiment of the liquid jet recording apparatus of the present invention, and FIG. FIG. 2(b) and FIG. 2(C) are for explaining the front part of the device shown in FIG. 1, and FIG. 2(a) is a schematic exploded view, and FIG. b) is a schematic perspective view showing the assembly, FIG. 2(C) is a schematic cross-sectional view, and FIG. 6(a). Figure 3 (C) is a schematic explanatory diagram for explaining the signal input wiring section, and Figures 4 (a) and 4 (b) are for explaining the configuration of the liquid discharge section. 4(a) is a front partial view, FIG. 4(b) is a sectional view, and FIG. 5 is a schematic perspective view showing a second embodiment. 100...Liquid jet recording device 1'01...Liquid discharge section 102...Connection wiring section 106...Drive control section 1
04... Matrix wiring section 105... Common board. Applicant Canon Co., Ltd.

Claims (1)

[Claims] A liquid ejection unit comprising a large number of ejection orifices for ejecting liquid to form flying droplets, and an electrothermal converter disposed in a trap for each ejection orifice corresponding to the ejection orifice. Drive control unit for driving each electrothermal converter of the discharge part: Connection wiring 11 that electrically connects each electrothermal converter and the drive control unit; Matrix wiring for sending signals to the drive control unit Department