TW202023836A - Method for scribing glass substrate having glass frit film simultaneously forming scribe lines on both a glass frit film and a glass plate - Google Patents

Abstract

The present invention provides a method for scribing a glass substrate having a glass frit film, which can simultaneously form scribe lines on both a glass frit film and a glass plate, wherein the scribe lines are processed for dividing the glass substrate having a glass frit film (W). The glass substrate having a glass frit film (W) has a glass frit film (W2) with a thickness of 20[mu]m to 30[mu]m on a surface laminate of a glass plate (W1) with a thickness of 0.5mm to 1mm. The scribing method is to have a grooved cutter wheel (A) with a tip angle ([alpha]) of 140 DEG to 160 DEG press tightly with a load of 2N to 10N on the surface of the glass frit film (W2) of the substrate and rotate at the same time so as to form scribe lines on both the glass frit film (W2) and the glass plate (W1).

Description

Scribing method of glass substrate with glass frit film

The present invention relates to a scribe line (notch) for processing and cutting a glass substrate with a glass frit film laminated on the surface of a glass plate. Planning method. The present invention particularly relates to a scoring method for laminating a thin glass frit film of about 20 μm to 30 μm on a glass substrate with a frit film on the surface of a soda glass plate.

In recent years, as a substrate for various electronic equipment, a glass substrate with a frit film in which frit is thinly coated on the surface of a soda glass plate is known. A glass substrate with a frit film is formed by adding a glass frit formed by adding oxides such as sodium oxide, aluminum oxide, boron oxide, etc. to silicon dioxide into a paste, and thinly coating the surface of the glass plate It is formed by firing.

Conventionally, in the case of cutting out a unit product from a large-size glass substrate, for example, a scribing device as shown in Patent Document 1 is used to press a cutter wheel against the surface of the glass substrate while pressing It rotates to form longitudinal and lateral scribe lanes (notches), and then breaks the scribe lanes by bending the substrate, thereby taking out the unit products.

As a dicing wheel for processing scribe tracks on a glass substrate, there are dicing wheels with a diameter of 2mm to 5mm, and there are also types with grooves provided with grooves at a certain pitch on the edge of the blade. Cutting cutter wheel, and normal cutter wheel without grooves (normal cutter wheel). These cutter wheels are used separately according to the thickness or material of the glass substrate.

In the glass substrate with the frit film, since the frit film is formed by firing, the film-forming surface tends to be curved into a concave shape due to shrinkage during cooling. When the curve is large, the work of scribing from the surface of the glass plate is often performed in order to facilitate suction and fixation. Here, when the thickness of the substrate is 0.5 mm to 1.0 mm, a cutting wheel with a diameter of 2 mm and a cutting edge angle α of the cutting edge ridge line portion is usually 100° to 130°. The cutting wheel is pressed and rotated from the surface of the glass plate to form the scoring channel on the glass plate, and then by tightening from the surface of the glass frit film on the opposite side to the surface where the scoring channel is formed A pressing member such as a break roller or a break bar bends the substrate and breaks it by extending the vertical crack below the scribe lane in the thickness direction of the substrate.

[Prior Technical Literature]

[Invention Patent Literature]

Invention Patent Document 1: Japanese Patent No. 3787489.

However, according to the above-mentioned processing method, since the frit film is not formed with a scribe line, the frit film is reluctantly separated by tearing at the same time as the breaking by the bending of the glass plate. Therefore, the material film cannot be separated with high quality along the scribed path of the glass plate, and irregular fracture marks are formed on the breaking end surface, or particles caused by the reluctant breaking of the glass frit film are generated. Powder), which is a major cause of quality degradation.

In addition, even when scribing from the frit film surface, when the cutting wheel with a generally used tip angle of 100° to 130° relative to the thickness of the substrate When scribing the surface, irregular horizontal cracks and a large number of fine particles may sometimes occur on the glass frit film, and the yield and quality of the cut unit products may deteriorate.

Therefore, the object of the present invention is to solve the above-mentioned problems and provide a method for scribing a glass substrate with a frit film that can simultaneously form scribe channels on both the frit film and the glass plate.

In order to achieve the above objectives, the following technical means are adopted in the method of the present invention. That is, the scribing method of the present invention is a scribing method for processing a scribe channel for breaking on a glass substrate with a frit film, and the glass substrate with a frit film has a thickness of 0.5 mm to 1 mm The surface area of the glass plate has a glass frit film with a thickness of 20 μm to 30 μm. The scribing method uses a cutting wheel with a tip angle of 140° to 160°, and the cutting wheel is removed from the glass frit of the aforementioned substrate The film surface is pressed and rotated with a load of 2N to 10N, so as to process a scribe on both the glass frit film and the glass plate.

Here, as the aforementioned cutting wheel, it is preferable to use a cutting wheel with grooves in which grooves are provided at a certain distance between the edge line portions of the cutting edges.

According to the present invention, when scribing by the cutting wheel, the glass frit film can be pressed tightly by increasing the angle of the blade tip to become a gentle slope of the blade, so that vertical cracks are generated between the frit film and the glass plate. both sides. This can effectively increase the scribing load, and can form sufficient deep scribing channels on both the glass frit film and the glass plate without breaking or horizontal cracks in the irregular direction, and the frit film The production of fine particles is suppressed to a minimum to prevent quality degradation.

In addition, since the scribe lanes associated with vertical cracks are formed on both the glass frit film and the glass plate, when the substrate is bent and broken, the frit film can also be along the scribe path at the same time as the glass plate is broken. The beautiful separation has the following effects: eliminating irregular fracture marks on the broken end surface as in the past, or generation of fine particles caused by reluctant division, so that excellent quality unit products can be cut.

1‧‧‧Subject

2‧‧‧Axle hole

3a‧‧‧Slope

4‧‧‧Cutting edge

5‧‧‧Groove

6‧‧‧Cutting knife holder

7‧‧‧Axis

8‧‧‧Adsorption table

A‧‧‧Cutting wheel

D‧‧‧Outer diameter

L‧‧‧Thickness

S‧‧‧Scribe Road

W‧‧‧Glass substrate with glass frit film

W1‧‧‧Glass plate

W2‧‧‧Frit glass film

α‧‧‧Tool tip angle

Figure 1 is a perspective view of the cutting wheel used in the method of the present invention.

Figure 2 is a front view of the cutter wheel.

FIG. 3 is a cross-sectional view when the glass substrate with the frit film attached is scribed by the above-mentioned cutter wheel.

Fig. 4 is an enlarged cross-sectional view during scribing.

Hereinafter, the details of the method of the present invention will be explained based on the drawings.

Figure 1 is a perspective view of the cutting wheel used in the method of the present invention, and Figure 2 is a front view thereof. The cutting wheel A is made of a metal material with excellent tool characteristics, for example, made of cemented carbide, sintered diamond, single crystal diamond, etc., and has the center of the disc-shaped body 1 The shaft hole 2 for mounting is formed with a blade edge ridge 4 composed of left and right inclined surfaces 3a, 3a that intersect each other on the circumferential surface. Although the outer diameter D of the cutter wheel A is selected from 1.8mm to 3.0mm, in this embodiment, the outer diameter D is 2mm, and the cutting edge angle α at which the left and right inclined surfaces 3a, 3a intersect is from 140° to 160 ° It is formed with a thickness L of 650 μm and an inner diameter of the shaft hole 2 of 0.8 mm. Furthermore, in this embodiment, grooves 5 are formed in the entire area of the blade edge ridge portion 4 at a predetermined interval, and the grooves 5 and the remaining blade edge ridge portions 4 are alternately formed to form a blade tip.

In addition, in Figure 3, the symbol W is a glass substrate with a frit film scribed by the method of the present invention, and a frit film W2 is layered on the surface of the glass plate W1 used as the base. The thickness of the glass plate W1 is 0.5 mm to 1.0 mm, and the thickness of the glass frit film W2 is 20 μm to 30 μm. These glass plates W1 and the glass frit film W2 are the processing objects. In this embodiment, the glass plate W1 is formed of soda glass, and the glass frit film W2 is formed by adding silicon dioxide (SiO ₂ ) with sodium oxide (Na ₂ O), aluminum oxide (Al ₂ O ₃ ), It is formed from oxides selected from boron oxide (B ₂ O ₃ ) and zinc oxide (ZnO).

As shown in Figure 3, when processing the scribe track, the above-mentioned cutter wheel A is rotatably mounted on the cutter holder 6 through the shaft 7, and the glass substrate with the frit film W is sucked and held by a suction table 8 so that the glass plate W1 becomes the lower side.

In this state, the cutter wheel A is pressed and rotated with a load of 2N to 10N from the surface of the glass frit film to score. When performing this scribing, as shown in FIG. 4, the glass frit film W2 is pressed tightly with the blade edge slope 3a which is made gentle by increasing the blade edge angle, and the tip of the blade edge penetrates at least into the glass frit film W2. Thereby, the scribing load can be effectively applied to the glass substrate, and the beautiful scribing line S can be processed on both the glass frit film W2 and the glass plate W1 without causing cracks or horizontal cracks in an irregular direction.

In addition, since the cutter wheel A rotates by friction with the substrate W, no slippage occurs on the contact surface of the blade tip inclined surface 3a and the glass frit film W2. Therefore, as shown in Fig. 4, except for the deep part of the tip of the blade, the part of the frit film in contact with the gentle slope 3a of the blade is pressed by the surface pressure, thereby suppressing the frit film W2 Side of the horizontal crack The processing of both the frit film and the glass plate is accompanied by vertical cracks in the scribe lanes, and the quality degradation due to the generation of fine particles can be suppressed.

In addition, by using a dicing wheel with grooves, even when a plurality of scribed roads formed on the surface of the substrate intersect, the scribed road can be formed reliably, and it is possible to suppress The quality is reduced.

Table 1 shows the results of a scribing test on the dicing wheel A with a changed blade tip angle α from the glass frit film surface with a scribing load (pressing load to the substrate) of 2N to 10N, respectively. Use a cutter wheel A with an outer diameter of 2 mm and a groove number of 200. In addition, a glass substrate with a glass frit film was used as a processing object with a thickness of the glass plate W1 of 0.7 mm and a thickness of the glass frit film W2 of 27 μm.

In the same table, the ○ mark indicates the vertical crack of the glass frit film and the glass plate that can be processed well in the state where the generation of fine particles has been suppressed. The × mark indicates the vertical crack of the glass plate W1 In the case of insufficiency, the △ mark indicates that a bad horizontal crack has occurred in the glass frit film.

In this scribing test, a good scoring track can be formed with a scribing load of 2N and 3N at a cutting edge angle of 140°. It can also be formed with a load of 2N to 5N at 145°, and at 150° It can be formed with a load of 2N to 7N, and can be formed with a load of 2N to 10N at 155°. In addition, it has been found from this test that it is possible to perform scribing in a wider load range as the angle of the tool tip becomes larger. In addition, it has been found that all cutting wheels with a tip angle of 140° to 155° can process the scribe path even with a scoring load as low as 2N. In addition, it can be understood from the test results that within the range of the above-mentioned ○ mark, the scribe lane can be processed beautifully.

In addition, although the test data is omitted, even in the case of a 2.5mm diameter grooved cutting wheel with the same tip as the above-mentioned 2mm diameter grooved cutting wheel A As a result of the same test as above, it is possible to form good scribe lines on both the glass plate and the glass frit film as in the test data of the 2mm diameter grooved cutter wheel.

Table 2 shows that for comparison with the present invention, the same cutting wheel with grooves as above is used on a soda glass with a thickness of 0.7mm on a single plate of soda glass without a frit film formed with different blades. A table of data for the angle marking test. According to this, in the cutting wheel with the tip angle of 140° to 155°, the scoring path cannot be processed at the scoring load of 2N to 8N. Even in the case where a scribe lane is formed on the surface of the glass plate of the substrate with the frit film, the same tendency can be seen. In contrast, when scribing from the glass frit film surface by the method of the present invention, as shown in Table 1 above, all the cutting wheels with a blade tip angle of 140° to 155° even have a cutting wheel as low as 2N. The scribing load can still process a good scribing path, and can be scribed in a wider load range as the angle of the tool tip becomes larger.

As described above, according to the method of the present invention, when scribing by the cutting wheel, the glass frit film W2 can be pressed by increasing the angle of the blade to become a gentle slope 3a. As a result, the scribing load can be effectively increased without causing cracks in irregular directions or horizontal cracks, and a sufficiently deep scribe channel can be formed on both the glass frit film W2 and the glass plate W1, and can be suppressed The production of fine particles in the glass frit film.

In addition, since the scribe lanes accompanying vertical cracks are formed on both the glass frit film W2 and the glass plate W1, when the substrate is bent and broken, the glass frit film can also be along the same time as the glass plate is broken. Scribe and separate beautifully, and thereby have the following effects: eliminate the irregular fracture marks on the end face of the split, or generate fine particles caused by the marginal split, so that the unit with excellent quality can be cut Products.

Although the representative embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-mentioned embodiments, and changes and corrections can be appropriately applied without departing from the scope of the present invention. .

[Industrial availability]

The present invention can be used for processing and cutting scribe lanes on a glass substrate with a frit film laminated on the surface of a glass plate.

3a‧‧‧Knife tip bevel

A‧‧‧Cutting wheel

S‧‧‧Scribe Road

W‧‧‧Glass substrate with glass frit film

W1‧‧‧Glass plate

W2‧‧‧Frit glass film

Claims (3)

A scribing method for a glass substrate with a frit film, which is a scribing method for processing a scribe channel for breaking on a glass substrate with a frit film. The glass substrate with a frit film is in the thickness A glass frit film with a thickness of 20 μm to 30 μm on one surface of a glass plate of 0.5 mm to 1 mm is characterized by: Use a cutting wheel with a blade tip angle of 140° to 160°, and press the cutting wheel from the glass frit film surface of the aforementioned substrate with a load of 2N to 10N while making it rotate, whereby the glass frit film and Both sides of the glass plate are processed and carved. The method for scribing a glass substrate with a glass frit film as described in the first item of the scope of patent application, wherein the cutting wheel is a grooved cutting with grooves provided at a certain distance from the edge of the blade Knife wheel. The scribing method of glass substrate with frit film as described in item 1 or item 2 of the scope of patent application, wherein the outer diameter of the cutting wheel is 1.8mm to 3.0mm.

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