JPS59230757A - Manufacture of electrode head - Google Patents

Abstract

PURPOSE:To obtain the electrode head of high resolution with good reliability, by a method wherein the burr causing the short-circuit between electrodes is removed by etching the cutting surface of cutting material cut out from the laminated material and therefore, the insulating layer is further thinned. CONSTITUTION:The close adhesive laminated material is foamed by alternately piling the electric conductor layer 201 and the electric insulating layer 202 in the direction of thickness, and is cut out as a read head. In that case, to prevent the conduction between electrodes with each other (conduction between electric conductors with each other), the cutting surface is chemically treated. Though the distance between the electrodes is shortened, the conduction between the electrodes is not generated on the cutting surface.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing an electrode head that is effective in a recording device that records electrical signals as visible images.

Conventional groove bottoms and their problems In recent years, with the development of office automation, various terminals have been required. Among these, recording devices that convert electrical signals into visible images, so-called printers, are in great demand, but there are few that are satisfactory in terms of performance.

Among various recording devices, discharge breakdown recording devices are generally well used because they are superior in terms of high speed, record preservation, and economical efficiency. However, the print quality of this recording device is very poor. That is, the resolution is not very good, and currently 5 to 6 dots/MPl is common.

Despite the ability of discharge rupture recording devices to achieve higher resolution, their functionality has been limited due to the difficulty in manufacturing the writing electrode head. The discharge breakdown recording device consists of a vapor-deposited aluminum layer, a black layer,
The vapor-deposited aluminum layer of the recording paper is grounded, and an electrode head to which a voltage is applied is brought into contact with the vapor-deposited aluminum layer, and the contact area is heated or discharge-destructed to remove the vapor-deposited aluminum and remove the black base layer. Printing is performed by exposing the layer. Therefore, in order to perform good writing, the writing electrode is made so that the electrode needle 101 is exposed in the first manner to ensure contact.

In the case shown in Figure 1 where the electrode needles are not exposed, the area around the electrode needles 1040 is broken, dust generated during recording accumulates, and the insulation between the electrodes is impaired, making it impossible to write well. This means that the exposed electrode needle must be made of a strong material, that is, it must be made of a very hard material, which makes it impossible to improve the resolution.

In order to solve this problem, a laminated type electrode head was devised, which is cut into a desired shape from a laminated body in which electrically conductive layers and electrically insulating layers are alternately laminated in the thickness direction. This electrode head can be used not only for recording discharge breakdown, but also for recording methods that utilize energization, such as generally known electrification thermosensitive recording and electrolytic recording.

It can also be applied to electrical thermal transfer and discharge transfer, and is expected to expand in the future.

However, to date, an inexpensive and effective manufacturing method has not yet been proposed, in which electrode heads are made by laminating multiple layers with a fine pitch between the electrodes, but the shape is unlikely to be used. .

In particular, when cutting a desired electrode head shape from a laminate, depending on the state of the cut surface due to the minute pitch between the electrodes, short circuits may occur in the cut state, and the short circuit point is searched for.
Finishing work had to be done. The thickness of the insulating layer could not be made very thin due to reliability issues due to the sharpness of the cut surface, and therefore it was difficult to manufacture high-resolution electrode heads.

OBJECTS OF THE INVENTION An object of the present invention is to provide a method for manufacturing a highly reliable laminated type electrode head used in a recording device that uses electricity.

Structure of the Invention The method for manufacturing an electrode head of the present invention includes a step of stacking electrically conductive layers and electrically insulating layers alternately in the thickness direction to form a laminate, and cutting the cut product into a desired shape. This process consists of a step of removing the cut object, and a step of etching the cut surface of the cut object, thereby realizing a recording device with high resolution and high reliability.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows an electrically conductive layer 201 and an electrically insulating layer 202.
FIG. 3 is a perspective view of a laminate in which the laminates are alternately stacked in the thickness direction to form a laminate in close contact with each other. FIG. 3 is a perspective view of a laminate cut out as a writing electrode head used for discharge breakdown recording. When cutting out the laminate, depending on the cutting method,
Due to the sharpness of the cut surface, the electrodes (electrical conductors) become electrically conductive. In particular, when the distance between the electrodes was reduced to increase resolution, most of the reeds were conductive at the cut surface. This problem can be easily prevented by chemically treating the cut surface.

An embodiment of the invention will be shown to clarify its effects.

(Example work) 36 μm thick electrolytic copper foil as electrical conductor layer.

6o~ using thermosetting epoxy resin as the electrical insulating layer
It was applied to copper foil to a thickness of 70 μm, heat-pressed to form a laminate, and cut into a desired shape using various cutting machines. The obtained electrode head is a laminated type electrode head with an inter-electrode pitch of 100 μm and a resolution of 10 lines per line.

Table 1 Continuity and conductivity in Table 1 were measured as follows.

(]) About Paris; Measured value of the spread of 36 μm copper foil based on a photograph of the cut surface.

(2) Regarding the measurement of conduction between conductive layers; short circuits between electrodes were checked, and those with short circuits were determined by ×, and those without were determined by ○.

As is clear from Table 1, depending on the method of cutting the laminate, cracks occur in the conductive layer, and short circuits are observed in many of the conductive layers in the initial state. Also, even if there is no short circuit, due to Paris,
There are problems with reliability.

When the laminated material cut by the plunge cut, which had the most fringing, was etched with concentrated nitric acid, the fringing was easily removed and there was no short circuit between the electrodes. If the etching time is longer than necessary, the metal part that is the conductive layer will be etched too much and only the resin of the insulating layer will remain.
Etching must be stopped when Paris is completely gone. Satisfactory etching times were obtained within 10 seconds and around 6 seconds.

(Example ■) A laminate with a resolution of 20 lines/MM or more was produced by hot pressing using an 18 μm rolled copper foil as the electrical conductor layer and a 26 μm modified acrylic adhesive sheet as the electrical insulating layer. When the electrodes were cut using six different methods and the conductivity between the electrodes was examined in the same way as in the example, short circuits were observed in all six methods. As the insulating layer becomes thinner, cutting becomes more difficult than before. When they were etched using iron chloride, the etching for 10 seconds completely eliminated the cracks and all short circuits. In this way, by cutting the laminate into a desired shape using appropriate machining equipment and etching the cut surface, the edges of the cut surface are completely removed, making it possible to manufacture highly reliable electrode heads. Ta.

Effects of the Invention The method for manufacturing an electrode head of the present invention is a further improvement on the method for manufacturing a laminated type electrode head that has been proposed in the past. By removing the particles that cause short circuits between stain electrodes, it is now possible to make the insulating layer even thinner, making it possible to reliably manufacture high-resolution electrode heads. The electrode head obtained by the manufacturing method of the present invention can not only be applied to a recording method that utilizes energization, but also can be applied to a wide variety of products as a very fine energization electrode.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are perspective views of a conventional electrode head, and FIGS. 2 and 3 are diagrams for explaining the present invention in detail. 101.104・Old・・Electrode, 102・Mountain・・Fixing part,
103... River lead, 201.301... Electrical conductor layer, 202.302... Electrical insulating layer. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure (α) (b) Figure 2 Figure 3

Claims (2)

[Claims] (1) A step of stacking electrically conductive layers and electrically insulating layers alternately in the thickness direction to form a laminate, a step of cutting the laminate into a desired shape to cut out a cut product, and a step of cutting the laminate into a desired shape; A method of manufacturing an electrode head, which consists of a process of etching the cut surface. (2) The method for manufacturing an electrode head according to claim 1, characterized in that copper is used as the electrical conductor layer.