JPH01136764A - Recording electrode - Google Patents

Abstract

PURPOSE:To enable reliable connection and enable high-quality images to be recorded by magnetic electrodes, by providing a plurality of conductor wirings on an insulating substrate, disposing the magnetic electrodes on the wirings at the same pitch as that of the wirings, and electrically connecting the wirings and the electrodes to each other by a specified anisotropic conducive film. CONSTITUTION:A plurality of mutually independent magnetic electrodes 2 are arranged in parallel on the surface of a first insulating substrate 1. A plurality of wirings 4 are provided in parallel on the surface of a second insulating substrate 3 at the same pitch as that of the electrodes 2. The electrodes 2 and the wirings 4 are disposed opposite to each other, and are electrically connected to each other by an anisotropic conductive film 5 having conductivity in the thickness direction thereof, having an insulating property in the plane directions thereof and capable of circuit connection through thermocompression bonding. An adhesive 6 is charged into the gap between the first and second substrate 1, 3 on one side of the electrically connected part on which the magnetic electrodes 2 are exposed, thereby fixing the substrates 1, 3 relative to each other. By this, separation of the substrates 1, 3 from each other under external forces is obviated, and reliability of the recording electrodes is enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image recording device, and in particular to an image recording device in which recording electrodes directly charge conductive magnetic toner to perform recording, thereby enabling high quality recording. The present invention relates to a highly reliable recording electrode with good productivity.

[Conventional technology]

Conventionally, various methods have been proposed in which a recording electrode and conductive magnetic toner are brought into direct contact and a voltage is applied to the recording electrode to obtain an arbitrary recorded image. The recording electrodes used in these recording devices are 1, for example, as described in Japanese Patent Publication No. 51-46707, in which the electrodes are made of thin iron wire and the sides of the electrodes are covered with epoxy; 127578
As described in the publication, a part of the copper foil laminated on the disconnected sheet was selectively removed. A method of using the end face of an electrode as an electrode and a method of coating an etched copper electrode with a magnetic material have been proposed. Other multi-needle electrodes for electrostatic recording are made by forming conductive wires at predetermined intervals on an insulating substrate, and then soldering conductors or thin wires arranged at the same intervals as the wires to securely connect them. There are methods for this, and related electrodes of this type include, for example, Japanese Patent Publications No. 44781/1983 and Japanese Patent Publication No. 25065/1983.

[Problem that the invention seeks to solve]

This type of recording device is required to have high quality recording and high productivity. In particular, printing resolution, which is a prerequisite for high-quality recording, is required to be about 8 to 16 dots per meter, and in recent years this resolution has tended to increase more and more. Also,
For example, if this resolution is increased, the width of the recording paper will be 20
In the case of 0nwi, if the recording electrodes are arranged individually in a row and the resolution is 10 dots/mm, the total number of recording electrodes will be 2000, which is a very large number, and productivity must be improved for mass production. Must be.

A second requirement for high quality recording is good contact between the conductive magnetic toner and the recording electrode.

The device described in Japanese Patent Publication No. 51-46707 uses a fine wire made of iron, which is a magnetic material, so the magnetic coupling with the conductive magnetic toner is good. Connect by.

Furthermore, since wiring is required even to the drive circuit, the more recording electrodes there are, the more difficult the task becomes.

No consideration is given to problems such as reduced reliability due to disconnection of wiring and increased physical size.

Next, in the method of forming a plurality of electrodes by etching, as described in Japanese Patent Laid-Open No. 55-127578, since the steel foil is etched, soldering work for wiring the electrodes is not required. However, since the contact between the electrode and the conductive magnetic toner is determined by magnetic conditions, the electrode is preferably made of a magnetic material, and a magnetically permeable plate is provided near the copper electrode. Although the performance has been improved by coating the copper electrode with a magnetic material, the performance has still deteriorated.

In addition, a method in which wiring is formed at predetermined intervals using a conductor on an insulating substrate, and conductive magnetic materials or conductive magnetic wires arranged at the same intervals as the third wiring are soldered and fixedly connected increases the resolution. This poses problems in reliability, such as the solder causing electrical continuity between adjacent electrodes, and variations in solder thickness resulting in poor flatness of the electrodes, which adversely affects printing.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a recording electrode that has good productivity, high reliability, and performs high-quality recording.

[Means for solving problems]

The above purpose is to provide a plurality of conductive wires on an insulating substrate by etching or film-forming technology, and arrange magnetic electrodes of electroconductive magnetic material on the wires at the same pitch as the wires, in the thickness direction of the film. The anisotropic conductive film, which has electrical conductivity in the plane direction and insulating properties in the plane direction, and can be connected to circuits by thermocompression bonding, is used to electrically conduct each wiring and the magnetic electrode, and to increase the bonding strength between the magnetic electrode and the insulating substrate. This is achieved by providing an increasing strength sharing member.

[Effect]

For wiring conductors on the insulating substrate, a highly productive film forming technique, etching method, plating method, or the like is used. On top of this wiring, conductive magnetic electrodes are connected using an anisotropic conductive film that has conductivity in the thickness direction of the film and M magnetism in the plane direction, and can be connected to circuits by thermocompression bonding. High-quality images can be obtained with the electrodes, and the thickness of the connection portion is made uniform without causing short circuits between adjacent electrodes during soldering, improving flatness, resulting in high reliability and improved productivity.

In addition, by providing a strength sharing member that increases the bonding strength between the magnetic electrode and the insulating substrate, it is possible to adjust the gap between the recording electrode and the recording electrode when mounting the recording electrode, which is a bonded assembly of the insulating substrate and the polar electrode, on an image recording device. Even if an external force is applied to the magnetic electrode at the tip, the force applied to the anisotropic conductive film, which does not have high bonding strength, can be minimized.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a recording electrode according to the present invention, and FIG. 2 is a longitudinal sectional view of FIG. 1. Figure 3 shows the first
The inside of the recording electrode connection section shown in the figure is shown.

The first insulating substrate 1 is made of a non-magnetic material such as ceramic, and has a plurality of independent magnetic electrodes 2 arranged in a row on its surface. The second insulating substrate 3 is made of ceramic, polyimide film, or the like, and a plurality of wires 4 arranged in rows at the same pitch as the magnetic electrodes 2 are provided on its surface. The magnetic electrode 2 and the wiring 4 are arranged to face each other, and are electrically connected by an anisotropic conductive film 5 that is conductive in the thickness direction of the film and insulated in the surface direction, and can be connected to a circuit by thermocompression bonding. ing.

The first . Second insulating substrate 1
The gap between and 3 is fixed by a strength sharing member made of adhesive. When the recording electrode shown in FIG. 1 is attached to an image recording apparatus and adjusted, an external force F shown in FIG. 2 is applied. The adhesive strength of the anisotropic conductive film 5 alone cannot withstand the component force F' caused by this external force F, and the first. The second insulating substrates 1 and 3 are separated, and the magnetic electrode 2 and the wiring 4 become non-conductive. Therefore, by fixing the part to which this component force F' is applied using the strength sharing member 6 with high adhesive strength, even if the external force F is received, the first part. The second insulating substrates 1 and 3 remain fixed to each other, and a highly reliable recording electrode can be realized. Further, as shown in FIG. 3, since the anisotropic conductive film 5 is continuously provided on the plurality of magnetic electrodes 2, there is no variation in the thickness of the film bonding part, and the flatness is high and the number of connections between the magnetic electrodes 2 and the magnetic electrodes 2 is high. Electrical connection with I4 can be easily made. The strength sharing member 6 may be disposed on the first insulating substrate 1 at the same time as the anisotropic conductive film 5, and then the second insulating substrate 2 may be aligned and fixed.

FIG. 4 shows the configuration of an image recording apparatus using the recording electrodes shown in FIG. 1. The end of the wiring 4 on the insulating substrate 3 that is not connected to the magnetic electrode 2 by the anisotropic conductive film 5 is connected to the output side of the electrode driving integrated circuit 7. The integrated circuit 7 is connected to signal and power supply wiring 8 and is molded with a synthetic resin protective film 9. The recording electrode 1o is composed of the parts numbered 1 to 9 mentioned above.

The developing member 11 is mostly made of a conductive member 11a, has a hollow shape, and has a mirror-finished surface and an insulating layer 11b having a thickness of about 2 to 100 μm. Memo @den p74i.

is installed with a gap of approximately 20 μm to 300 μm from the developing member 11. During this gap adjustment, the tip of the recording electrode 10 may be welded to the developing member 11, or
The first insulating substrate 1 on which the magnetic electrode 2 of the recording electrode 10 is applied is also subjected to an external force F due to toner transport, which will be described later.
The second insulating substrate 3 on which the wiring 4 is attached is strongly fixed by the strength sharing member 6, so that peeling does not occur.

A permanent magnet 12 is arranged below the S electrode 10 and inside the developing member 11. The toner supply means is hopper 1.
3, a magnet roll 15 and a sleeve 16 which are alternately magnetized to north and south poles. The hopper 13 includes a second sleeve 17 having a protruding shape, and contains conductive magnetic toner 14 .

Further, a means for removing unnecessary toner on the developed image is arranged at a position sandwiching the recording electrode 10 with respect to the toner supply means.
It consists of a hopper 18, a second magnet roll 19 which is alternately magnetized to N and S poles, and a sleeve 20.

A conductive rubber roller 21 is suppressed below the developing member 11 with a recording paper 22 interposed therebetween. The signal and power supply wiring 8 of the recording electrode 10 is connected to an image signal edge and a power supply line (not shown), and the conductive material member 11a of the developing member 11 is grounded. Also, for the conductive rubber roller 21.

A transfer voltage circuit (not shown) for transferring toner from the developing member 11 to the recording paper 22 is connected.

During image recording, the toner 14 stored in the hopper 13 is transferred to the sleeve 16.1 by the rotation of the magnet roll 15.
7 and reaches the tip of the recording electrode 10. A toner chain is created by the toner 14 that connects the magnetic electrode 2 and the outer surface of the developing member 11 in a chain shape by the magnetic field of the permanent magnet 12, and voltage is applied to the plurality of magnetic electrodes 10 from the electrode driving integrated circuit 7 according to one image signal. When the voltage is applied, charge is injected into the toner 14. At the same time, charges of a different polarity from the charges injected into the toner 14 are induced at the boundary between the conductive member 11a and the insulating layer 11b of the developing member 11, and these two charges attract each other due to Coulomb force.

Further, by rotating the developing member 11 in the direction of the arrow,
The toner chain is cut and a developed image is formed using the charged toner. At this time, some of the toner is transferred to the developing member 1.
1 is transported over the developing member 11 irrespective of the image, resulting in stains on the recorded image. This unnecessary non-image toner can be selectively attracted by the magnetic attraction force of the magnet roll 19, conveyed on the sleeve 20 by rotation of the magnet roll 19, stored in the hopper 18, and removed from the developing member 11. . Developing member 11
The developed image recorded on the recording paper 22 is transferred to the recording paper 22 by mechanical contact with the electrostatic field created by the conductive rubber roller 21, and is fixed onto the recording paper 22 by a fixing device (not shown).

During image recording as described above, the pressure of the transported toner 14 is applied to the tip of the electrode 10, but since the strength sharing member 6 is provided, the anisotropic conductive film 5 is not adversely affected. I won't give it.

According to this embodiment, since the magnetic electrode is provided on the non-magnetic insulating substrate, it can be fixed to multiple wires in one piece.
This has the effect of increasing productivity.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a perspective view showing the configuration of a recording electrode according to a second embodiment of the present invention, and FIG. 6 is a longitudinal sectional view of FIG. 5.

The magnetic electrode 2 is an electrode manufactured using double-sided etching technology on a magnetic plate, and is arranged facing a plurality of independent wiring lines 4 arranged in a row on the surface of an insulating substrate 3, and is anisotropically arranged. Electrical connection is made by a conductive film 5, and the tip end of the magnetic electrode 2 is fixed to an insulating substrate 3 by a strength sharing member 6 made of adhesive.

According to this embodiment, the number of electrode patterns produced by double-sided etching is 8/I or more, 3! For the II wire, the electrode is etched with ears for holding the electrode at both ends, and then the ears are cut off to create the shape of the magnetic electrode 2 shown in Figure 5. By first adhering one side of the anisotropic conductive film 5 onto the magnetic electrode etching pattern and then molding it, the spacing between each electrode can be kept constant.

Subsequent alignment and adhesion to the wiring pattern on the insulating substrate can be easily performed, which has the effect of increasing reliability.

A third embodiment of the present invention will be described with reference to FIG.

FIG. 7 is a perspective view showing the structure of the recording electrode, and FIG. 8 is a longitudinal sectional view of FIG. 7.

The reinforcing member 23 is an insulator. 1st. The electrodes and wiring on the second insulating substrates 1 and 3 are electrically connected by an anisotropic conductive film 5, and a reinforcing member 23 is attached to each corner of the insulating substrates 1 and 3 with adhesive. It is fixed due to the strength-sharing member properties.

According to this embodiment, since only the anisotropic conductive film 5 is involved in bonding the insulating substrates 1 and 3 together, there is no need to control the thickness of the adhesive of the strength sharing member 6, and the flatness is high. .

Furthermore, since the magnetic electrode is reinforced at two places, one on the front end and the other on the rear end, it has the effect of further increasing its strength.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The figure is a cross-sectional view showing the configuration of a recording electrode.

The magnetic electrode 2 is provided on a transparent insulating substrate or film 1'.
One end is exposed and fixed.

Magnetic electrode 2 on first insulating substrate 1 configured in this way
and the wiring 4 of the second insulating substrate 3 are electrically connected by an anisotropic conductive film. The gap between the second insulating substrates 1 and 3 is fixed by a strength sharing member.

According to this embodiment, since a part of the bonded portion is provided with a magnetic electrode on a transparent insulating substrate, there is an effect that alignment with the wiring 4 on the second insulating substrate 3 can be easily performed. 1. Effects similar to those of this embodiment can be obtained from 1.1 in FIG. Second insulating substrate 1
, 3 can also be obtained as a transparent insulating substrate or a partially transparent insulating substrate.

Note that the present invention is not limited to the above-mentioned embodiments, and, for example, the strength sharing member may be disposed at two or more locations, and in order to further increase the strength, a portion of the magnetic electrode portion shown in FIG. 5 may be arranged. It may be covered with a reinforcing film or molded with synthetic resin.

〔Effect of the invention〕

According to the present invention, wiring having the same pitch as the electrodes to be manufactured is provided on an insulating substrate, and a conductive magnetic electrode is placed on the wiring so as to have electrical conductivity in the direction of the thickness of the film and insulating properties in one surface direction, and is bonded by thermocompression. Since conductive bonding is performed using an anisotropic conductive film that allows circuit connection, and a strength sharing member is provided to increase the bonding strength between the conductive electromagnetic electrode and the insulating substrate, it is possible to simply conduct conductive connection. Productivity is improved. In addition, the flatness is high without causing short circuits between adjacent electrodes.

The strength-sharing member prevents direct external force from being applied to the anisotropic conductive film, so a highly reliable connection can be achieved without becoming non-conductive, and the effect of obtaining high-quality images with magnetic electrodes is increased. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a recording electrode according to an embodiment of the present invention. 2 is a longitudinal sectional view of FIG. 1, FIG. 3 is a perspective view of the inside of the recording electrode connection portion of FIG. 1, and FIG. 4 is a diagram showing the configuration of an image recording apparatus using the recording electrode of FIG. 1. . FIG. 5 is a perspective view of a recording electrode according to a second embodiment of the present invention, FIG. 6 is a longitudinal sectional view of FIG. 5, and FIG. 7 is a perspective view of a recording electrode according to a third embodiment of the present invention. 8 is a longitudinal sectional view of FIG. 7, and FIG. 9 is a sectional view of a recording electrode showing a fourth embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Insulating substrate, 2... Magnetic electrode, 3... Insulating substrate, 4... Wiring, 5... Anisotropic conductive film, 6... Strength sharing member. Agent Patent attorney Masaru Koyo F, -”% 2, Figure 1 Z 2 Figure 3 Liver Sotosexual Board 4 !L! 5 Anisotropic + 14 Densuno L Muro Strength Konsai Dankaku 1 Husband 3 Thought 1 Insulation・）1 Substrate 2 Magnetic electrode Tertiary edge and Substrate 6 Strong 7V, current bearing material not 4 16 Existing eaves material / 7 Eimata Oeki Figure 5 Futsu Figure 4 Wiring 5 $ direction I゛ 66 j 3 White; Electric; Autumn 2nd iron ai extreme 3rd era R sex certain selection 4 Nishiotaku nail 23 no strong group Chichi 9th Figure 1 Bo? Green base 3 Zetsu soft vermilion 11 base sales 4 Wiring 5 Anisotanoe conductive 7+) L4 6 Strength now flat 9y autumn

Claims (1)

[Claims] 1. In a recording electrode used in an image recording device, the recording electrode includes a plurality of independent conductive wires arranged in a row on an insulating substrate, and a conductive magnetic material arranged at the same pitch as the wires. A recording electrode characterized in that the electrode is conductively fixed to the electrode using an anisotropic conductive film. 2. A recording electrode according to claim 1, in which a strength sharing member is provided in contact with or near both the insulating substrate on which the wiring is provided and the electromagnetic conductive electrode. 3. The recording electrode according to claim 2, wherein the strength sharing member is provided with a reinforcing member. 4. In the recording electrode according to claim 2, the electroconductive magnetic material electrode is provided with a conductive magnetic material on an insulating substrate, and the electroconductive magnetic material electrode and conductive wire are provided. A recording electrode in which at least one of the insulating substrates is transparent.