JPH04161358A - Manufacture of ion generating device for dielectric recording - Google Patents

Abstract

PURPOSE:To make it possible to fix dielectrics to electrodes without disturbing generation of ion by forming a dielectric layer by coating the electrodes with dielectric solution consisting of acrylonitride monosaccharide, polysaccharide, polymer of polysaccharide, or mixture of these. CONSTITUTION:Surfaces of first electrodes 2 and/or second electrodes 4 are coated with solution consisting of acrylonitride monosaccharide, polysaccharide, polymer of polysaccharide or mixture of these. A formed dielectric layer 3 is heated and activated so as to fix to other electrode or the dielectric layer 3 on other electrode. Thus, an ion generating device for dielectric recording having a plurality of first electrodes 2 formed on one face of the dielectric layer 3 extending to one direction and a plurality of second electrodes 4 formed on other face extending in the direction crossing the first electrodes 2 is manufactured. In this device, there is no adhesive between the electrodes and the dielectric layer, so that ion can be generated uniformly and efficiently without any disturbance.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing an ion generator for electrostatic recording, and in particular to a method for producing an ion generator for electrostatic recording, and in particular, an ion generator for ion flow electrostatic recording used in electrostatic printing and copying. The present invention relates to a method of manufacturing a generator.

[Conventional technology] In electrostatic printing, etc., ions are generated at a high current density,
A method is known in which this is extracted and selectively applied to a member to be charged to imagewise charge it, and an apparatus for this purpose is disclosed, for example, in Japanese Patent Laid-Open No. 57-501348. The ion generator used in this method has a plurality of first electrodes fixedly extending in one direction on one surface of the dielectric layer, and a plurality of first electrodes extending in one direction on the other surface of the dielectric layer, and a plurality of first electrodes extending in one direction on the other surface of the dielectric layer. It is made by fixing a plurality of extending second electrodes, and the first electrode and the second electrode constitute a matrix.

When a high voltage is applied alternately between the first electrode and the second electrode corresponding to a selected portion of the matrix, positive and negative ions are generated near the second electrode corresponding to the selected portion. The generated ions are selectively extracted by the third electrode and applied to the member to be charged, thereby making it possible to charge the member to be charged. Therefore, electrostatic recording using dots can be performed by selectively driving the electrodes in the matrix structure.

The dielectric material used in such an ion generator is required to not break down even under the high voltage applied for ion generation.

Further, in order to efficiently generate ions, a material having a high dielectric constant is suitable. In the device shown in JP-A-57-501348, mica is used as a dielectric and is fixed to the electrode with an organic polysiloxane adhesive.

[Problems to be Solved by the Invention] However, as shown in Japanese Patent Application Laid-Open No. 57-501348, when an adhesive is used as a means for fixing the dielectric and the electrode, the surface of the dielectric at the opening of the second electrode is is covered with adhesive, which prevents ion generation. The openings of this second electrode are minute and there are an extremely large number of openings, and it is extremely difficult to remove all the adhesive present in such portions. Furthermore, if such an adhesive is removed by cleaning, there is a high possibility that the adhesive portion between the electrode and the dielectric material will peel off. In this case, there is a problem that a high-definition image cannot be obtained because there are parts where ions cannot be generated.

An object of the present invention is to provide a method for manufacturing an ion generating device that allows a dielectric and an electrode to be fixed together without hindering the generation of ions, thereby enabling high-definition image formation.

[Means for Solving the Problems] A method of manufacturing an ion generator for dielectric recording according to the present invention includes a dielectric layer and a plurality of first electrodes extending in one direction formed on one surface of the dielectric layer. and a method for manufacturing an ion generator for dielectric recording, comprising a plurality of second electrodes extending in a direction intersecting the first electrode formed on the other surface of the dielectric layer, wherein the first electrode and /or a step of applying a solution of an acrylonitrilated monosaccharide, polysaccharide, polysaccharide polymer, or a mixture thereof to the surface of the second electrode to form a dielectric layer; A step of stacking the electrodes or a dielectric layer on the other electrode, and a step of heating and activating the dielectric layer to fix the dielectric layer and the other electrode or the dielectric layer on the other electrode. It is characterized by

In the method of the present invention, a dielectric layer is formed by applying a dielectric solution consisting of an acrylonitrilated monosaccharide, polysaccharide, polysaccharide polymer, or a mixture thereof to the electrode.

Usable monosaccharides include heptose and hexose sugars, and polysaccharides include pullulan, cellulose,
Examples include galactose, mannose, fructose, galactopyranose, etc., and examples of polysaccharide polymers include ercinane.

In the method of the present invention, it is possible to apply the dielectric solution only to the surface of either one of the first and second electrodes, or to the surfaces of both.

After drying the applied dielectric layer and stacking the other electrode, by heating one or both electrodes,
The dielectric layer can be activated by heating. When the dielectric solution is applied to both electrodes, after the dielectric layers formed by coating are stacked on top of each other, the dielectric layers are activated by heating one or both electrodes. I can do it. When cooled after heating and activation, the electrode and the dielectric layer or the dielectric layers are firmly fixed to each other.

[Function] In the method of the present invention, a dielectric solution consisting of an acrylonitrilated monosaccharide, polysaccharide, polysaccharide polymer, or a mixture thereof is used to form a dielectric layer. After placing an electrode on the dielectric layer formed by applying this dielectric solution, heating the dielectric layer activates the dielectric layer and develops wettability, and cooling causes the dielectric layer and electrode to separate. Firmly adheres. Similarly, when a dielectric solution is applied to two electrodes, the dielectric layers are firmly fixed to each other.

In the ion generator for dielectric recording obtained by the method of the present invention, since there is no adhesive between the electrode and the dielectric layer, the surface of the dielectric layer at the opening of the electrode where ions are generated is covered with adhesive. Therefore, the generation of ions is not hindered in any way. Therefore, the ion generator for dielectric recording obtained by the method of the present invention can efficiently
Uniform ion generation is possible.

[Example] Hereinafter, with reference to the drawings, specific examples of the present invention will be described.
explain.

FIG. 1 is a sectional view of an ion generator manufactured by the method of the present invention, and FIG. 2 is a perspective view thereof.

In FIG. 1, a plurality of first electrodes 2 formed on an insulating substrate 1 extend in parallel to a direction perpendicular to the paper surface,
A plurality of second electrodes 4 are arranged in a direction different from this first electrode 2.
is growing. A dielectric layer 3 is sandwiched between these first and second electrodes.

The second electrode 4 has an opening at a position corresponding to the first electrode 2, that is, at an intersection area. A third electrode 6 is arranged on the opposite side of the second electrode 4 from the first electrode 2, and this third electrode 6 has an opening corresponding to the opening of the second electrode 4. An insulator layer 5 is sandwiched between the second electrode 4 and the third electrode 6, and the insulator layer 5 has an open lower opening corresponding to the openings of the second electrode 4 and the third electrode 6. have.

In the ion generator configured as described above, by selectively applying a voltage between the plurality of first electrodes 2 and the second electrodes 4, the second electrode corresponding to the selected portion is Positive and negative ions are generated near the opening of No. 4. Second
A bias voltage is applied between the electrode 4 and the third electrode 6, and only ions determined by the polarity are extracted from the generated ions. The extracted ions pass through the insulator layer 5 and the opening of the third electrode 6, and selectively charge a member to be charged (not shown) disposed opposite the third electrode 6. In this way, the plurality of first electrodes 2
By selectively driving the second electrode 4, a dot latent image is formed on the charged member.

That is, this ion generator functions as an electrostatic recording head.

Examples for specifically manufacturing the ion generator described above will be described below with reference to FIGS. 3 to 6.

Example 1 As shown in FIG. 3, an electric board was prepared by pasting a 5 μm thick copper foil on an insulating substrate 11 made of glass or epoxy FPC board, and the copper foil was selectively etched by ordinary photolithography. , a plurality of first electrodes 12 in a predetermined pattern were formed. The insulating substrate 11 provided with the first electrode 12 was cleaned and dried. Next, a mixture of a polymer obtained by converting methylated pullulan to acrylonitrile and a polymer obtained by converting cellulose to acrylonitrile (weight ratio 1:
5) was dissolved in an N,N-dimethylformamide solution to prepare a dielectric solution having a concentration of 25 weight.

This dielectric solution was applied onto the insulating substrate 11 so as to embed the first electrode 12 using ordinary screen printing. By heating the coating layer at 100°C for 15 minutes,
The coated layer was dried. The process from application to drying is 1~
This was repeated 10 times to form a dielectric layer 13 (dielectric constant 17) with a thickness of 40 μm so as to cover the first electrode 12.

Next, as shown in FIG. 4, a plurality of second electrodes 14 (made of stainless steel, thickness 30 μm) each having a plurality of openings are placed on the dielectric layer 13 so that the openings 15 are connected to the first electrode 1.
2, the first electrode 12 was arranged in a different direction from the first electrode 12. In this state, a heating plate was gently placed on the second electrode 14 and heat-pressed at a temperature of 125° C., and the surface of the dielectric layer 13 was activated by heating to develop adhesiveness.

Thereafter, the heating plate is cooled to room temperature, and the dielectric layer 13 and the second
The electrodes 14 were fixed to each other.

After removing the heating plate, a layer with a thickness of 100 mm is placed on the second electrode 14.
A .mu.m photosensitive insulating resin film (solder resist) was vacuum laminated, and this film was patterned by photolithography to provide openings corresponding to the openings of the second electrodes 14.

Further, a third electrode (not shown) made of stainless steel with a thickness of 30 μm is positioned on top of it so that its opening corresponds to the opening of the photosensitive insulating resin film.
The ion generator was obtained by bonding through a silicone adhesive layer with a thickness of m.

In the ion production device manufactured in this manner, no adhesive is present near the openings 15 of the second electrode. Therefore, when a voltage was applied alternately between the first electrode and the second electrode, ions were efficiently and uniformly generated without being hindered by the adhesive. In addition, since a high dielectric constant polymer with a dielectric constant of 17 is used as the dielectric material, it is possible to lower the applied voltage for ion generation, thereby reducing the burden on the electric circuit. became.

In this example, a dielectric polymer with a dielectric constant of 17 was used, but the dielectric constant could be adjusted within the range of 16 to 19 by changing the dielectric material, polymer compounding ratio, film forming conditions, etc. You can.

In addition, the concentration of the dielectric solution was 25% by weight, but 3% by weight was used.
It can be used between 0 and 50% by weight. Furthermore, although the drying temperature of the coating layer was set to 100°C, it can be dried at 70 to 120°C. Heat breath can also be performed at a temperature of 80 to 130°C.

Example 2 As shown in FIG. 5, on a flexible substrate 21 in which a 5 μm thick copper foil is pasted on a 70 μm thick polyimide film 21, the copper foil is selectively etched by ordinary photolithography to form a predetermined pattern. A plurality of first electrodes 22 were formed in a pattern of .

A 40% acetone-N,N-dimethylformamide solution of a polymer obtained by converting methylated pullulan to acrylonitrile is discharged onto the flexible substrate 21 having the first electrode 22 using an air dispenser, and this dielectric solution is then applied using a doctor blade. It was applied so as to be embedded between the first electrodes. The coating layer is heated and dried at 80 to 100°C, and the first
A first dielectric layer 23 having the same thickness as the electrode 22 was formed.

Next, a mixture of a polymer obtained by converting methylated pullulan to acrylonitrile and a polymer obtained by converting cellulose to acrylonitrile (weight ratio 1:5) was mixed with N.

A dielectric solution having a concentration of 25 weight was prepared by dissolving it in N-dimethylformamide solution. This dielectric solution was applied by ordinary screen printing onto a polished flat plate made of a difficult-to-adhesive material such as Teflon, and dried by heating to a thickness of 35 μm.
A dielectric film of m was formed. This dielectric film was peeled off from the difficult-to-adhesive material plate and placed on the first electrode 22 as shown in FIG. 6 to form a second dielectric layer 24. A second electrode is further placed on top of this in the same manner as in Example 1,
Heat breathing was performed in the same manner as in Example 1. The second dielectric layer 24 was heated and activated by this heat breath and developed adhesive properties. Thereafter, the first and second electrodes 22 and 25 were fixed to the dielectric layer 24 by cooling. Thereafter, the same procedure as in Example flJ 1 was followed to obtain an ion generator.

When a voltage was applied alternately between the first electrode and the second electrode using the ion production device manufactured in this way, as in Example 1, the generation of ions was prevented by the adhesive. Ions were generated efficiently and uniformly.

In this example, the dielectric solution for forming the first dielectric layer was 40% by weight, but it was 30 to 50% by weight.
It can be used between. In addition, although the dielectric solution for forming the second dielectric layer was 25% by weight, it was 20 to 50% by weight.
It is possible to use between % by weight.

Example 3 In the same manner as in Example 1, as shown in FIG.
5 μm thick on an insulating substrate 11 made of an epoxy FPC board.
A plurality of first electrodes 12 in a predetermined pattern were formed on an electrical board to which a copper foil was attached by selectively etching the copper foil by ordinary photolithography. The insulating substrate 1 provided with the first electrode 12 was cleaned and dried. Next, a mixture of a polymer obtained by converting methylated pullulan to acrylonitrile and a polymer obtained by converting cellulose to acrylonitrile (weight ratio 1:5) was dissolved in an N,N-dimethylformamide solution to prepare a dielectric solution having a concentration of 25 weight. This dielectric solution was applied onto the insulating substrate 11 so as to embed the first electrode 12 using ordinary screen printing. The coating layer was dried by heating it at 100° C. for 15 minutes. This process from coating to drying is repeated 1 to 10 times to form the first dielectric layer 13 (dielectric constant 1
7) was formed to cover the first electrode 12.

On the other hand, a plurality of second electrodes 14 each having a plurality of openings
(Made of stainless steel, thickness 30 μm) The above-mentioned dielectric solution was applied to the surface other than the opening, and the applied layer was dried by heating it at 100° C. for 15 minutes. This process from coating to drying was repeated 1 to 10 times to form a second dielectric layer (not shown) on one surface of the second electrode 12.

Next, as shown in FIG. 4, a plurality of second electrodes 14 are placed on the dielectric layer 13 so that the openings 15 correspond to the first electrodes 12, and the first and second dielectric The layers were arranged in a different direction from the first electrode 12 so that they overlapped with each other.

In this state, gently place the heating plate on the second electrode 14 and
Heat pressing was performed at a temperature of 25° C., and the surfaces of the first and second dielectric layers were activated by heating to develop adhesive properties.

Thereafter, the heating plate was cooled to room temperature, and the first dielectric layer and the first electrode, the second dielectric layer and the second electrode, and the first and second dielectric layers were fixed to each other.

Thereafter, the same procedure as in Example 1 was followed to obtain an ion generator.

In the ion production device manufactured in this manner, no adhesive is present near the openings 15 of the second electrode. Therefore, when a voltage was applied alternately between the first electrode and the second electrode, ions were efficiently and uniformly generated without being hindered by the adhesive. In addition, since a high dielectric constant polymer with a dielectric constant of 17 is used as the dielectric material, it is possible to lower the applied voltage for ion generation, thereby reducing the burden on the electric circuit. became.

In this example, a dielectric polymer with a dielectric constant of 17 was used, but the dielectric constant could be adjusted within the range of 16 to 19 by changing the dielectric material, polymer compounding ratio, film forming conditions, etc. You can.

In addition, the concentration of the dielectric solution was 25% by weight, but 2
It can be used between 0 and 50% by weight. Furthermore, although the drying temperature of the coating layer was set to 100°C, it can be dried at 70 to 120°C. The heat press can also be performed at a temperature of 80 to 130°C.

[Effects of the Invention] As explained above, in the ion generator for dielectric recording obtained by the method of the present invention, since there is no adhesive between the electrode and the dielectric layer, the opening of the electrode where ions are generated is The surface of the dielectric layer in is not covered with adhesive, so the generation of ions is not hindered in any way. Therefore, according to the ion generator for dielectric recording obtained by the method of the present invention, it is possible to efficiently and uniformly generate ions.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an ion generator manufactured by the method of the present invention, FIG. 2 is a perspective view thereof, and FIGS. 3 and 4 illustrate the manufacturing process of an ion generator according to an embodiment of the present invention. The cross-sectional views shown in FIGS. 5 and 6 are cross-sectional views showing the manufacturing process of an ion generator according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Insulating substrate, 2... First electrode, 3... Dielectric layer, 4... Second electrode, 5... Insulator layer, 6...
- Third electrode, 7... opening. Applicant's representative Patent attorney Jun Tsuboi Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] a dielectric layer, a plurality of first electrodes extending in one direction formed on one surface of the dielectric layer, and a plurality of first electrodes extending in one direction formed on the other surface of the dielectric layer; In the method for manufacturing an ion generator for dielectric recording, which includes a plurality of extending second electrodes, the surface of the first electrode and/or the second electrode is coated with an acrylonitrile monosaccharide, a polysaccharide, or a polysaccharide polymer. applying a solution of a combination or a mixture thereof to form a dielectric layer, overlaying the other electrode on this dielectric layer or overlaying a dielectric layer on the other electrode; A method for manufacturing an ion generating device for dielectric recording, comprising a step of fixing the dielectric layer and the other electrode or the dielectric layer on the other electrode by heat activation.