JPS58140280A - Manufacture of thermal printer head - Google Patents

Abstract

PURPOSE:To obtain a thermal printer head having a glass graze layer without upheaval part on its upper end by a method in which a glass graze layer is formed across the base plate and the other base plate leading to the upper end of the base plate so as to break the boundary between both the base plates. CONSTITUTION:A snap line 14 is formed on the boundary between both base plates 21A and 21B as two base plates 21, and a paste for the graze layer 12 is printed across a snap line 14 and baked. By dividing the base plate 21 at the snap line 14 into two sections by breaking, two thermal printer heads having no upheaval part on its upper end can be obtained at a time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a thermal printer head. The formation of the glaze layer is usually done using the same printing method as thick film printing, but the surface of this glaze layer should be as flat as possible. FIG. 1 shows a plan view of a conventional head, which includes a single-digit ceramic substrate, a 2σ glass glazing layer, and a three-digit resistance heating element (including figures 2M and subsequent figures). ) The line for connecting I11 to the resistive heating element is omitted 1. It is.

In manufacturing this head, the above-mentioned 1. In order to form a glaze M2 on the surface of the substrate 1, when the base F is printed and fired on the surface of the substrate 1, the periphery becomes raised after firing and becomes about 5μ thicker than the flat part in the center of the top. Knowledge
ing. Of course, the width of this mound is about 25mm wide, so if you change the width of Reze Mausoleum 2 to this @JF, it will be the left and right edges. is the same thickness as the central flat H1 part, but it is necessary to make the erosion of the glaze layer 2 less than 25mm. Sei hhi ga 6 part 2
A begins to form and curl. However, if you use the raised part 2A with such a raised part 2A remaining, the raised part 2A will get in the way when printing, and the surface of the resistance heating element will come into contact with the 1^ rough assembly! , and it becomes impossible to print clearly. In order to ensure contact with the heat-sensitive paper, it is necessary to increase the F force of the head against the thermal paper.
Ha.

The inventor V has proposed a method of manufacturing such a bulge portion of the glaze layer so that the terminal end Mνr of the glaze layer is not formed.
Therefore, I made a separate proposal. 3 and 41, the glass glaze layer 12 is formed by printing a partial VC paste on the surface of a substrate of high thermal conductivity (eg, ceramic such as A4/Mina) Form. A resistance heating element] 3 is formed on the surface thereof. When printing the paste for forming the glaze layer 12, one end of the substrate 11 is extended [7] with the extension portion 11A and 11. Here, print one layer of 12 J-1 and extend it to the required length. This j+l encroachment part 12' is a raised part 12 after firing. It is easily understood that A is formed.

After that, this extended portion 12 is broken. The brace left by the pulling process 12 has a bulge at its upper end.
2 A ir, -1 ω II - remainder I - (8). This state is shown in Fig. 5.

In order to make the break easier, it is a good idea to create a snap line 4 on the surface of the board 1 in advance. In this case, the paste for the glaze layer is printed, and during post-baking, the paste swells out along the snap lines.
Sometimes you bury the snap line, then break later 11. In order to avoid lining that may become difficult, place sleeve brine 1 on the back side of the board 1 so that there is an I mark.
4 A H-! If you apply the snap line 14A on the back, it will be easier to break.
).

By the way, according to the above-mentioned manufacturing method, the extension part 1A is discarded, which is wasteful and economical.

The object of the present invention is to propose a method for manufacturing a thermal photoreprinter head having a glass glaze layer without a glaze on the upper end by eliminating discarded parts.

An embodiment of this invention will be explained with reference to FIGS. 6 and 7.

In addition, parts with the same reference numerals as in FIG. 3 and F1.41 indicate the same or corresponding parts. As can be seen in FIGS. 6 and 7, two substrates 21 are prepared, such as one substrate 21A and a substrate 21B, which is the upper end of the substrate 21A. In other words, when comparing the drawing with Figure 3, if 1'#, the board 1
The extension portion 11A corresponds to the substrate 11B. First, a snap line 14 is formed at the boundary between the substrates 21A and 2!1B. Paste lath nut line for glaze layer] 2] Print and bake across 4, the upper and lower ends of glaze layer 12
A raised portion 1.2A will be formed. After this, break snap line 14≠＼medical board 21! , part. According to this, two heads can be manufactured on the skin and one substrate 21Δ, 21B obtained.
As in Figure 5, the soil glaze layer is raised at the top and has some form on the shingle area. Note that -13Δ and 131-1 are resistors for each head @thermal element.

Note that the width of the glaze layer 2 is such that the raised 11 parts do not form on the left and right edges after firing. By doing this in this way, the bulge will form only at the top and bottom of the glaze layer.
Just like the C chip, make 4 numbers in one stroke to create 9 IJIs. Therefore, place sleeve lines on the front surface of the board in the vertical and horizontal directions or in the vertical direction.
Two heads facing each other in %-Hv as a pair and 12,
All you have to do is straddle both of them and do the pace for the blended layer as shown in Figure 6. In this case, place the snap line in the arcuate groove 1. If you keep this in mind, the periphery of the head obtained after the break will be in an arc shape.
a diagonally and its periphery touches the thermal paper 1. Even so, it is convenient because when the thermal paper is moved by the feed hK, the peripheral edge does not scratch the surface of the thermal paper.

As shown in Figure 5, the bulge at the bottom of the glaze layer 2 has not been removed, but the platen facing the hepa-do has this remaining bulge. If you do not face the glaze layer, it will not get in the way at all during printing. The head that does not exist is also obtained at the top of the glaze layer, and the head that does not exist is obtained by pulling it. 11. Since there is no part to be discarded in the furnace, it is extremely economical.

[Brief explanation of drawings]

Fig. 1 is a plan view of the conventional example, Fig. 2 is a sectional view of the same side, and Fig. 3 is a plane M-
Fig. 4 is a sectional view of the same side - Fig. 5 is a sectional view of the side after blurring - 1
';A, Figure 6 is a cross-sectional view of plane 1-1 and 7th bacterium I for detailed explanation of the invention. 21A, 2] 1-(...Private board,] 2...3. Glaze layer, 12A...6 parts of fill +, 14...Boundary snap line Patent applicant ROHM Co., Ltd. ``(0 people) Kinnosuke Nakazawa～～＼

Claims (2)

[Claims] (1) Spread the paste for the glass gelase layer across the substrate and another substrate at one end, and after baking, print and bake the paste for the glass gelatin layer with a width that is not too thick on the left and right edges. Method 9 for manufacturing a thermal paste that breaks the boundary between the two substrates after firing (2) A method for manufacturing a thermal printer head according to claim 1, which comprises forming snap lines for breaking on the front and back surfaces of the boundary between both substrates.