JPS60155469A - Manufacture of electrode head - Google Patents

Abstract

PURPOSE:To obtain an electrode head which enables recording with a high resolution by a method wherein a fixing material comprising a lubricating inorganic filling agent and a thermosetting resin is placed on a pattern, molded integral with a laminate body and then, a support layer is peeled off. CONSTITUTION:Copper undergoes a photoetching with respect to a laminate body 34 in which copper is laminated on a polyimide film 31 at the thick of 20mum by electrodeposition to form a stripe-shaped electrode 32. Then, a fixing material 33 produced by mixing a hexagonal boron nitride powder and unhardened thermosetting resin is placed on the electrode 32 and heated at 200 deg.C for 3hr to integrate a support 31, the stripe-shaped electrode 32 and the fixing material 33. Finally, the polyimide film 31 as support is peeled off to obtain an electrode head with the resolution capacity of 10lines/mm.. This electrode head enables printing without damaging a recording paper.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing an electrode head for a recording device that records electrical signals on a recording medium.

Conventional configurations and their problems In recent years, various terminals have been required for office automation. Among them, there is a great demand for recording devices that convert electrical signals into visible images, so-called printers.
2. Description of the Related Art Conventionally, recording devices using various methods have been manufactured. At the same time, development of high-resolution heads for each method is progressing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electrode head of a recording device using a conventional discharge rupture recording paper will be described below with reference to the drawings.

Figure 1 is an exploded cross-sectional view of an electrode head of a recording device using conventional discharge rupture recording paper (hereinafter referred to as a discharge printer). It is made by fixing the electrode needle 13 to the part with solder 14, and then supporting it with identification materials 15 and 16. 17 is an adhesive layer that adheres the polyimide film 11 and the copper foil 12.

However, in the above manufacturing method, the electrode needle 1
3 is fixed with solder 14, and if the interval between the electrode needles is narrowed, it becomes difficult to fix with solder 1 and 4.

In addition, since the electrode needle protrudes, a thick electrode needle must be used to remove it. For this reason, there was a problem in that an electrode head that enabled high-resolution recording was not available.

Therefore, there is an electrode head as shown in FIG. 2 that is capable of high-resolution recording. This board is made by integrating a substrate 26, which is made by etching a copper foil of a flexible printed circuit board into stripes, with a fixing material 21 of a resin molded product using an adhesive 22. Here, 23 is a polyimide film, 24
2 is an adhesive layer, and 26 is a striped etched insulator foil.

However, in this electrode head, the heat generated during recording causes the adhesive layer 24 that fixes the copper foil 26 and the polyimide fiber 23 to each other. The adhesive 22 bonding the polyimide film 23° flexible printed circuit board and the fixing material was destroyed, dust generated during recording was attached thereto, and the striped copper foil was deformed. Furthermore, since 21 resin molded fixing materials were used, the recording paper was scratched during recording, making it impossible to record well.

OBJECT OF THE INVENTION An object of the present invention is to provide a method for manufacturing an electrode head that enables high-resolution recording.

Structure of the Invention The method for manufacturing an electrode head of the present invention includes the steps of forming the electrically conductive layer of a laminate consisting of an electrically conductive layer and a support layer into a desired pattern, and applying a lubricating inorganic material on the pattern. A fixing material made of a mixture of a filler and a thermosetting resin is placed on the laminate and the fixing material. - It has a step of integral molding and a step of peeling off the support layer, and is a completely established method for manufacturing an electrode head that enables high-resolution recording. However, the lubricating inorganic filler is a material having excellent properties of lubricity, heat resistance, and military insulation, such as hexagonal boron, talc, kaolin, and carbon fluoride.

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

[Example 1] FIGS. 3(a) to 3(C) are cross-sectional views showing steps of a method for manufacturing an electrode head in an example of the present invention. In FIG. 3, 31 is a support (for example, a polyimide film), 32 is a striped electrical conductor (for example, copper foil),
33 is a fixing material (for example, a molded body of a mixture of 60% hexagonal boron nitride and 40% by weight thermosetting resin)
, 34 is a laminate consisting of an electrical conductor 32 and a support layer 31.

The manufacturing process will be described below in order.

FIG. 3(a) shows a laminate 34 in which copper is laminated to a thickness of 20 μm by electrodeposition on a polyimide film 31 in a striped pattern (
The electrode 32 with a line width of 50 μm and a line spacing of 50 μm is formed by photoetching. next.

A fixing material (hexagonal boron nitride 60 molar mass) (containing -cent), which is a mixture of hexagonal boron nitride powder and uncured thermosetting resin (epoxy resin), is placed on the striped electrode. Support 31. is heated at a temperature of 200° C. for 3 hours. Each of the striped electrode 32° fixing members 33 is integrally molded (FIG. 3(b)).

Finally, by peeling off the polyimide film 31 serving as the support, an electrode head capable of resolving 10 main channels is obtained (FIG. 3(C)).

The feature of the manufacturing method of the electrode head of the present invention is that striped electrodes are formed by photo-etching and the electrodes are transferred to the fixing material, so there is no need to solder the electrode needles as in the conventional method, and the electrodes also protrude. This manufacturing method makes it easy to obtain an electrode head capable of high-resolution recording. Furthermore, since the fixing material contains all hexagonal boron nitride, an electrode head that can print without damaging the recording paper during printing can be obtained.

[Example 2] The mixing ratio of hexagonal boron nitride powder, which is a fixing material for an electrode head obtained by the same manufacturing method as in Example 1, and a thermosetting resin (epoxy resin) was changed to use it as a fixing material. obtained using n
The electrode head was attached to a discharge printer, and the results were evaluated by printing on discharge breakdown recording paper, and Table 1 shows the results.

US h-BN: Hexagonal boron nitride In Table 1, printing quality is an evaluation of the stability of the dot shape after 60,000 characters have been printed. The difficulty of dust adhesion is about the tip of the electrode head after printing 50,000 characters. Hardness is a total evaluation of whether printing can be done without damaging the discharge rupture recording paper when printing on the discharge rupture recording paper.

The flame retardance was evaluated in accordance with UL Standard 94 using a test piece with a total thickness of 1/16 inch. Processability is a measure of whether striped electrodes can be transferred to the fixing material.

As is clear from Table 1, the hexagonal boron nitride content is 1
If it is less than 0 weight percent, the area around the electrode will be destroyed by heat during printing, etc., and dust generated during recording will adhere to it, causing deformation and disconnection of the electrode, making it unusable as an electrode head. Furthermore, when the content of hexagonal boron nitride was 90% by weight or more, the striped electrode could not be transferred to the fixing material and could not be evaluated as an electrode head.

From the above, it follows that the method for manufacturing the electrode head of the present invention is effective, and (2) that the fixing material that can be used as the electrode head is preferably one containing 20 to 80 percent by weight of hexagonal boron nitride. More preferably, those containing 40 to 70 weight percent exhibited a greater effect.

[Example 3] A mixture of Ketalc powder and thermosetting resin (epoxy resin), which is the fixing material for the electrode head obtained by the same manufacturing method as in Example 1, was used, and the mixing ratio of Merck and thermosetting resin was varied. Table 2 shows the evaluation results obtained by attaching the obtained π electrode head to a discharge printer and printing on discharge breakdown recording paper.

In Table 2, print quality and dust resistance.

Hardness, flame retardancy, and 710 workability were evaluated using the same evaluation methods as in Example 2. As is clear from Table 2, Merck content is 2
If the weight is 0 weight or less than -cent, the area around the electrode will be destroyed by heat during printing, and dust generated during recording will adhere to it, damaging the insulation between the electrodes and causing deformation of the electrode and disconnection noise.The electrode head will be damaged. It could not be used as such. 1, the talc content could not be transferred to the 90-layer fixing material, and it could not be evaluated as an electrode head.

From the above, even when a mixture of Merck and a thermosetting resin is used as the fixing material, the method for manufacturing an electric head of the present invention is effective as long as the total Merck content is in the range of 30 to 80% by weight. , electrode head and -. Preferably, those containing 60 to 70 cents by weight exhibited greater effects.

As described above, similar results were obtained even when Merck was used instead of hexagonal boron nitride as the fixing material.

In addition, although the manufacturing method of the electrode head using copper as the electrode formed in the stripe shape was described in the Example, it is not limited to copper and other electrical conductors may be used. For example, nickel is a common example.

Further, regarding the transfer, the entire or part of the support layer may be peeled off from the fixing material. Six types of lubricating inorganic fillers were used for the fixing material.
Properties of hexagonal boron nitride and talc (lubricity, heat resistance,
It has excellent electrical insulation properties), and n can be easily estimated from the present invention.

Effects of the Invention As is clear from the above explanation, the present invention provides a step of forming the electrically conductive layer of a laminate consisting of an electrically conductive layer and a support layer into a desired pattern, and a step of forming a lubricious layer on the pattern. A step of integrally molding the laminate and the fixing material by placing a fixing material made of a mixture of an inorganic filler and a thermosetting resin, and a step of peeling off the support layer,
This method allows easy production of electrode heads that enable high-resolution recording.

Furthermore, by using hexagonal boron nitride or a mixture of talc and a thermosetting resin as a fixing material, it is possible to obtain an electrode head that does not scratch the recording paper during printing.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view when a conventional electrode head is disassembled, Figure 2
The figure is a cross-sectional view of a conventional high-resolution recording electrode head, and FIG. 3 is a cross-sectional view showing the manufacturing method of the electrode head in an embodiment of the present invention in the order of steps. 11.23...Polyimide film, 12...
...Copper foil formed into stripes, 13...
... Electrode needle, 14 ... Solder, 16, 16, 21
．． 33...Fixing material, 22...Adhesive,
17, 24...adhesive layer, 26°32...
... Striped electrical conductor, 26 ... Flexible printed circuit board, 34 ... Laminate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure f, Figure 2 113!1,'? 2

Claims (1)

[Claims] (1) A laminate comprising an electrically conductive layer and a support layer. forming the electrically conductive layer in a desired pattern;
The method includes the steps of: placing a fixing material made of a mixture of a lubricating inorganic filler and a thermosetting resin on the pattern and integrally molding the laminate and the fixing material; and peeling off the support layer. A method for manufacturing an electrode head characterized by: (匈) Manufacture of an electrode head according to claim 1, which uses hexagonal boron nitride as the lubricating inorganic filler of the fixing material and contains 20 to 80 weight percent of hexagonal boron nitride. (3) The method for producing an electrode head according to claim 1, characterized in that talc is used as the lubricating inorganic filler of the fixing material, and the talc is contained in an amount of 30 to 80% by weight.