JPH0360194B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for visually aligning a ceramic substrate and a screen mask during thick film printing.

When performing thick film printing on a ceramic substrate, conventionally, a marker for indicating the substrate outline or a marker for positioning is formed on a screen mask, this screen mask is placed on the ceramic substrate, and the screen mask or the ceramic substrate is moved to print the substrate. Alignment is performed by visually matching the outer shape indicating marker and the outer shape of the ceramic substrate, or by visually matching the alignment indicating marker and the break groove formed in the ceramic substrate.

However, with such conventional alignment methods, in the former case, the outline of the ceramic substrate may become unclear due to burrs, chips, etc., and in the latter case, the break groove may be thin and the same as the ceramic substrate. Since the colors are difficult to see, both have the disadvantage that alignment accuracy is difficult to obtain visually.

The purpose of the present invention is to solve these drawbacks, and for this purpose, a colored line is obtained by coloring the break groove with an organic pigment that is burned out by firing, and this color line and the alignment instruction marker formed on the screen mask are The feature is that alignment can be performed accurately by matching the .

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1A and B, 1 is a ceramic substrate;
2 is a cross-sectional shape V formed on the ceramic substrate 1.
3 is a thin colored line obtained by coloring multiple parts of the break groove 2, and in FIG. 2, 4 is a screen mask;
5 is a printed pattern formed in the center of the screen mask 4, and 6 is a positioning instruction marker formed around the printed pattern 5.

A method of obtaining the colored line 3 by coloring the break groove 2 is to use an organic pigment that is easily distinguishable from the color of the ceramic substrate 1 and the color of the emulsion used in the screen mask 4, and that is burnt out by firing. An ink containing, for example, magic ink is dropped into the break groove 2, and the bottom of the break groove 2 is colored over an appropriate length by capillary action. The position to be colored is the position corresponding to the alignment instruction marker 6 on the screen mask 4, for example, in the figure, the intersection of the vertical and horizontal break grooves 2 is selected.

The ceramic substrate 1 with the colored lines 3 formed at multiple locations of the break grooves 2 in this manner is mounted on a printing press table (not shown), and a screen mask 4 is overlaid on the ceramic substrate 1 as shown in FIG. , ceramic substrate 1 or screen mask 4
is moved to visually align the color line 3 and the alignment instruction marker 6 so that they match.

After alignment, the normal thick film printing process is carried out.
Further, normal thick film substrate firing is performed in an air atmosphere.
By this firing, the organic pigment used for coloring is burnt out, so the color line 3 disappears and the break groove 2 takes on the color of the ceramic substrate 1 itself. Therefore, the ceramic substrate 1 is not contaminated.

As explained above, the present invention obtains easily distinguishable colored lines by coloring the break grooves formed in the ceramic substrate with an organic pigment that is burned away by firing, and the positions formed on the screen mask and the colored lines are easily distinguished. Since the alignment instruction markers are made to match, there is an effect that visual alignment can be performed easily and with high precision.

In addition, since the outline of the ceramic substrate is not used, the alignment line will not be obscured by burrs or chips, and the organic pigment used to obtain the color line will be burned off after the substrate is fired. It also has the advantage of not requiring a process to erase colored lines, and for these reasons can be used for thick film printing in general.

[Brief explanation of drawings]

FIG. 1A is a side view showing an example of a ceramic substrate used in the present invention, FIG. 1B is a plan view thereof, FIG. 2 is a plan view showing an example of a screen mask used in the present invention, and FIG. FIG. 1... Ceramic substrate, 2... Break groove, 3
...Colored line, 4...Screen mask, 5...Print pattern, 6...Positioning instruction marker.

Claims (1)

[Claims] 1 Break grooves formed on the ceramic substrate,
A thick film characterized in that alignment is achieved by matching a color line obtained by coloring with an organic pigment that is burnt out by firing and an alignment indicator marker formed on a screen mask overlaid on the ceramic substrate. How to align the print.