JPS58199171A - Preparation of discharge recording head - Google Patents

Abstract

PURPOSE:To easily prepare a discharge recording head with high preciseness, by a method wherein a pattern comprising plural fine head parts and line parts formed on a print base board is coated with an insulating material and slightly protruded by removing the insulating material applied to the part other than the pattern part. CONSTITUTION:A pattern comprising plural fine head parts 2 having fine shape preciseness and line parts 3 connected thereto is formed on a print base board 1 and, after the whole of this base board is coated by an insulating material 4, the head leading end is cut to bring the base board 1, the head parts 2 and the insulating material 4 to a same plane. In the next step, the leading ends of the head parts 2 are immersed in a solvent 5 to dissolve and remove the base board 1 and the insulating material 4 and the pattern parts of the head parts are protruded several mum - several ten mum. By this method, because plural patterns can be formd on the base board in high preciseness at high density, printing quality can be enhanced to a large extent.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an electric discharge recording head that enables recording transfer by overlapping a medium and a recording paper, and colliding and adhering discharge minute fragments of the medium to the recording paper. It is something.

In discharge transfer recording, first, a medium consisting of a conductive layer, a semiconductive layer, and a conductive layer is superimposed on Shintsu recording paper.

Next, by bringing the anode and the pole f into contact with the medium and applying a constant voltage between the two poles, discharge breakdown occurs near the interface between the semiconductor I11 and the conductive layer. At this time, the broken pieces of the ridge collide with the recording paper and are fixed by the heat generated at the same time, thereby creating a permanent record. Therefore, by controlling this discharge breakdown to a desired state, it can function as a printer head. The printer head generally has 411 anode metal ronds with a diameter of about 0.2 to 0.3M arranged in parallel, and the anode is placed at a position away from the Fih electrode metal rond. In this case, the anode may be incorporated as a head together with the anode, or may be separate. Since the conventional head has only a few metal ronds and there is no need to improve the pitch consistency, there were almost no problems in manufacturing and mounting the head. However, with the recent demand for higher density, the dot density has increased from 8 to
For 10 pieces/11M, the total diameter of the metal ronds must be less than 0.1 length, the pitch dimension must be less than 0.1 iris, and the insulation between the metal ronds.

Keep pitch accuracy similar or improve implementation and connections (it
] There is a Zhao between K and Etc. Nine, if you make Kinjo Rondo protrude more than necessary, there is a risk of damaging the medium.
When pressing the metal iron, it is necessary to reduce the pressure. However, if the pressure of the metal iron is too low, printing errors may occur, making it difficult to achieve reliable, high-quality printing characteristics. Another method is to form a fine head pattern on a printed circuit board by etching, process the end face of this fine head flush, and press it against the medium. In other words, forming fine dots by etching can sufficiently cope with the increase in dot density and is extremely easy to implement.

However, since the nozzle/end portion and the end surface of the substrate are on the same surface, recording and transfer cannot be achieved unless the pressing pressure is extremely large (several to several degrees). However, increasing the pressing pressure places an unnecessary burden on the device, head, medium, recording paper, etc., and causes damage to each of them.

An object of the present invention is to provide a method for manufacturing a discharge recording head that eliminates such drawbacks. According to the present invention, an etching pattern consisting of a fine head portion and an M node portion is formed on a printed circuit board, and after coating an insulating material, the end t of the fine head portion is etched.
By finishing hI and dissolving and removing the insulating material and the printed circuit board at the tip of the head using a solvent, a method for manufacturing a discharge recording head with a slightly protruding pattern portion can be obtained.

This will be explained below using figures.

FIG. 1 is a t+ view of a printed circuit board on which a fine head portion and a line portion are formed, and FIGS. 2, 3, and 4 are enlarged sectional views of a fine head portion of a head manufacturing method showing an embodiment of the present invention. , FIG. 5 shows head 0. Contact form II with media and recording paper
FIG. In FIG. 1, it is an I#i printed board, and a pattern of a fine head portion 2 and a line portion 3 connected thereto is formed by etching. In FIG. 2, 4 is an insulating material, and the entire printed circuit board l in FIG. 1 is separated by this insulating material 4. AA indicates a cutting point, and as shown in FIG. 3, the tip of the head is cut, and the printed circuit board 1, the pattern part of the fine head part 2, and the insulating material 4 are made on the same surface.

In FIG. 4, the insulating material 4 and printed circuit board 1 at the tip of the head are slightly dissolved and removed using s#i solvent.

The printed circuit board 1 and the insulating material 4#i are generally made of epoxy, and dimethylformamide, for example, is effective as a solvent. Therefore, by removing the printed circuit board 1 and the insulating material 4, the pattern portion of the fine head portion 2 protrudes by only several μm to several lθμ. in this case,
Since the two pattern parts of the head part are protruded and the other parts are dissolved, there is no need for a combination of epoxy resin and dimethylformamide. In Figure 5, 6#
In the i-medium, the recording paper 7 is in contact with the - side, and the pattern of the fine head section 2 and the cathode 8 are in contact with the other side. That is, since the recording transfer state 11t--t is shown, the medium 6 and the recording paper 7 are set so that they are superimposed and can be fed. Next, the pattern portion of the fine head 2 is lightly pressed (a gram - several tens of grams), and a constant voltage is applied between the head 2, which is an anode, and the cathode 8. Therefore, the current at this time causes discharge micro-destruction in the medium 6,
These minute broken pieces collide with the recording paper 7 and are fixed. This minute break Jli! By controlling I with a microcomputer etc.
It can function as a printer.

As described above, according to the present invention, it is possible to extremely easily form a fine head with a height of 1n1 degree on a printed circuit board by etching, thereby making it possible to significantly reduce costs compared to the metal rond method. Furthermore, etching allows formation of a large number of patterns with high precision and high @fK, resulting in a significant improvement in printing quality. Insulation is reliably maintained between each pattern #i, and terminal processing and connection are simple, rounding and mounting are extremely easy. In addition, since the 9m head pattern protrudes slightly, it was possible to print with extremely light contact pressure compared to conventional printed circuit board edge contact. The contact pressure is reduced (without damaging the medium), and the need for replacing, maintaining, and staining the medium and recording paper can be eliminated. Furthermore, the mechanical structure of the printer can be easily and compactly constructed, and the power consumption can be reduced. Furthermore, as a result of the micro pressure, the consumption of the medium was reduced, resulting in 1.
It can withstand many times more use than conventional products. When the contact pressure is high, dust, metal pieces, minute pieces of media, etc. tend to accumulate on the tip of the head, which can lead to electrical short circuits between patterns and between metal ronds. The occurrence of accidents can also be suppressed. Even if dust or the like occurs, the present head is completely covered by the insulating material, so it is possible to prevent dust from entering. This head has many advantages as described above, and is extremely advantageous in terms of mounting accuracy, connection, cost, density, etc.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a printed circuit board on which a fine head part and a line part are formed, and FIGS. 2, 3, and 4 show a fine head part for explaining an embodiment of the head manufacturing method of the present invention. An enlarged cross-sectional view of the board f/P shown in Figure 1 is shown in Figure 2.
3. An enlarged cross-sectional view of a fine head portion covered with edge material and showing round nodes. FIG. 3 is a cross-sectional view of the end portion cut away. FIG. FIG. 5 is a cross-sectional view showing the contact between the fine head, the medium, and the recording paper. In the figure, a printed circuit board, a 2 #i fine head section,
3 is a line part, 4 is an insulating material, 5 is a solvent, 6 is a Fi medium, 7 is a recording paper, and 8 is a cathode.The cutting position of the AAFi fine head is shown. Figure 1 Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] Each pattern of one or more fine head portions having extremely fine shape accuracy and the groove portions connected thereto is formed on a printed circuit board, and after this printed circuit board is covered with an insulating material, the end surface of the fine head portion is formed. A method for manufacturing an electric discharge recording head, characterized in that the pattern portion is slightly protruded by finishing the fine head portion, immersing the vicinity of the fine head portion in a solvent, and removing the molten layer from areas other than the pattern portion.