JPS5915088B2 - How to cut glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a glass cutting force method that allows only one blade of opposing upper and lower glass plates to be cut without causing any damage to the others.

Conventionally, various methods have been proposed as cutting force methods for glass.

That is, (9) Mechanical cutting (1) A method of cutting by making scratches on the surface by making use of the mechanical property of glass, which has low tensile strength, and applying tensile stress to the scratched area.

(2) A cutting method using abrasive grains such as diamond, carholundum, corundum, and diamond sand.

2. Flame cutting (1) A method in which the glass is scratched and the crack is progressed by applying force to the scratched area and then cutting the glass (crack-off method).

(2) A method of melting or cutting glass using a heat source such as combustion gas (fusion cutting method) (3) A method of melting or cutting glass using a high heat source such as a laser, plasma, or electron beam.

However, the above-mentioned method can be used to cut a single sheet of glass, cut several sheets of glass at the same time, cut glass tubes, melt ampoules, etc. Inside two pieces of glass that are glued or fixed together,
It was extremely difficult to cut one glass without damaging the other at all.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a glass cutting method that can cut only one of the opposing upper and lower glass plates without causing any damage to the other glass plates.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of the present invention, and in the figures, a shows the state before the glass is cut, and b shows the state after the glass is cut.

In each figure, the same parts are designated by the same reference numerals.

In Figure 1, 1 is an upper glass plate, 2 is a lower glass plate, and 3 is a reflective film formed on the inner surface of the uncut glass plate 2. This reflective film is used as a reflecting mirror of an optical resonator of a laser device. A reflective film made of aluminum, or a reflective film deposited with a high-purity metal such as aluminum, gold, or silver is used.

4 is an adhesive such as an organic compound or a low melting point glass frit, and this adhesive is used to integrate the upper and lower glass plates 1 and 2.

It goes without saying that the upper and lower glass plates may be integrated using some fixing means other than adhesive.

Reference numeral 5 denotes a laser beam irradiated from the outside of the upper glass plate 1 facing the reflective film 3 provided on the lower glass plate 2. This laser beam 5 melts and cuts only the upper glass plate 1, and the lower glass plate 2 Since the laser beam 5 is reflected by the opposite film 3, it is not cut, and therefore only the upper glass plate 1 can be cut.

A diagram of the state in the case of cutting is shown in FIG.

Further, as a laser device for glass cutting, for example, a carbon dioxide laser is used.

FIG. 2a shows a case where a reflective film 3 is provided on the inner surfaces of the upper and lower glass plates 1 and 2, and the state after the glass is cut is shown in the same figure.

Figure 3a shows reflective films 3, 3 on two places on the inner surface of the lower glass plate 2.
The figure shows the state of the glass after it has been cut by a laser beam.

The above-mentioned laser beam has a narrow beam, accurate cutting position, and extremely excellent cutting effect.

As explained above, according to the present invention, it is possible to cut only one force of the upper and lower glass plates without causing any damage to the other force, so it is necessary to cut only the - force of the two glass plates. For example, when forming an electrode structure on the uncut glass plate surface of a display device such as a liquid crystal, digitron, or ECD (electromic display), or forming an LSI or circuit wiring part on the uncut glass plate surface. It is effective to use it in cases where

[Brief explanation of the drawing]

1a and 1b are side views of the glass before and after cutting, showing an embodiment of the glass manufacturing method according to the present invention; FIGS. 2a and 2b are side views of the glass before and after cutting;
b is a side view showing another example of the same force method, Fig. 3a +
b is a side view showing still another embodiment of the same sword method. In the figure, 1: upper glass plate, 2: lower glass plate, 3: reflective film,
4: Adhesive, 5: Laser beam.

Claims (1)

[Claims] 1. Form a reflective film on the desired inner surfaces of the opposing upper and lower glass plates, integrate the upper and lower glass plates using adhesive or fixing means, and irradiate the reflective film with a laser beam from an external force on the glass plate facing the glass plate. A glass cutting force method characterized by cutting the glass plate.