JPH02120259A - Sealed and bonded glass and production thereof - Google Patents

Abstract

PURPOSE:To obtain a sealed and bonded glass having improved reliability of the bonded part by closely contacting a pair of transparent glass materials interposing a light-absorbing thin member composed of a transparent colored glass and melting the light-absorbing thin member with laser light to bond both transparent glass materials. CONSTITUTION:A NESA glass 12 is placed on a light-absorbing colored thin film 13 formed on a bonding face of a substrate glass 11 beforehand and the positions of both glass materials 11 and 12 are aligned. A YAG laser beam 14 is radiated e.g., against the glass 12 from above while moving in the direction of the arrow. The laser light transmitting through the glass 12 is absorbed in the thin film 33, which is melted by the heat generated by the absorption of light. The contacting faces of the glass materials 11, 12 contacting with the thin film 13 are also melted by the heat of molten thin film 13. Accordingly, the glass 11 can be stably bonded to the glass 12 without causing the displacement between the glass plates. The objective sealed and bonded glass is produced by the above process.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to, for example, the first aspect. By bringing the second transparent glass body into close contact with the light-absorbing thin material via the light-absorbing thin material and melting the light-absorbing thin material by irradiating the laser beam, The present invention relates to a glass sealed bonded body formed by bonding a second glass transparent body and a manufacturing method thereof.

(Prior art) In recent years, when glass is bonded for sealing, a light-absorbing thin film made of a thin metal film is formed in advance at the bonded portion of the glass, and this light-absorbing thin film is melted by irradiation with laser light. A method of joining has been proposed. According to this method, it is possible to compensate for the drawbacks of conventional bonding methods using organic adhesives, such as the tendency for positional deviation to occur during engraving and the inability to precisely control the contour shape of the bonded portion.

However, the method of bonding the light-absorbing thin film described above by melting it with laser light has limitations on the combinations of bonding materials between glass and thin metal films to which this method can be applied, and the reliability of the bonded portion is limited. The problem was that it was bad. In other words, since glass and metal generally have different coefficients of thermal expansion, it is necessary to select materials with similar coefficients of thermal expansion for bonding, and there are very few combinations of materials for bonding glass and metal thin films. It becomes limited. Additionally, the thermal expansion properties of glass and metal are essentially different; for example, glass has a glass transition point, whereas metal does not. In this way, the above method has different thermal expansion coefficients and characteristics for glass and metal, so even if bonding is performed under certain conditions, environmental changes such as temperature changes, or There was a drawback that the joints were likely to break down over time.

(Problems to be Solved by the Invention) This invention solves the problem that the conventional method of bonding glass by irradiating a metal thin film with a laser beam and melting the metal thin film has limitations on the combination of bonding materials. This glass sealing joint was created to eliminate the drawback that the reliability of the joint was poor, and it is not limited by the joining material and can improve the reliability of the joint. The purpose is to provide a method for producing the same.

(Means for Solving the Problems) This invention has the following features: 1. By bringing the second transparent glass body into close contact with the light-absorbing thin material via the light-absorbing thin material and melting the light-absorbing thin material by irradiating the laser beam, In the glass sealing assembly formed by joining the second transparent glass body, a blue-tinted glass transparent body is used as the light-absorbing thin material.

(Function) This invention increases the light absorption coefficient of the light-absorbing thin material by using a colored glass transparent body as the light-absorbing thin material. The second glass transparent body and the light-absorbing thin material are made to have approximately the same thermal expansion characteristics.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a glass sealing assembly of the present invention, such as liquid crystal, EL (Electr).

Luminescence), ECD (Electr
This example shows a case where a substrate glass 11 and a Nesa glass 12 of a display element such as an ochromic display are hermetically bonded over the entire surface. Note that (a) is a top view, and (b) is a side view.

The substrate glass 11 is a normal float glass, and a light-absorbing thin film 13 as a roughening light-absorbing thin material is deposited on the bonding surface of the substrate glass 11 by sputtering. Further, the Nesa glass 12 is also a normal float glass.

As the light-absorbing thin film 13, for example, float glass is doped with 1% by weight of iron (Fe) ions.
The glass becomes the target material.

In this case, the light-absorbing thin film 13 is colored in a color unique to iron ions, and the light absorption coefficient increases.

FIG. 2 shows the light absorption characteristics when float glass is doped with 1% by weight of transition metal ions. As is clear from this characteristic diagram, even transition metal ions other than iron can be used in float glass, such as manganese (Mn), cobalt (co), chromium (Cr), nickel (Ni), copper (Cu), etc. If the float glass is doped with transition metal ions, the float glass will be blued to a color specific to each metal ion, so the light absorption coefficient can be increased in either case.

The joining method will be explained as shown in FIG. 1(a).

As shown in (b), first, the Nesa glass 12 is placed on the light-absorbing thin film 13 previously formed on the bonding surface of the substrate glass 11, and the two glasses 11 and 12 are aligned. In this state, for example, the YAG laser beam is irradiated from above the Nesa glass 12 while moving the YAG laser beam in the direction of the arrow shown by the dashed line. Then, the laser beam 14
The light passes through the transparent Nesa glass 12 without being absorbed, but is absorbed by the light-absorbing thin film 13. Therefore, the light-absorbing thin film 13 is melted by the heat generated by light absorption. Furthermore, the heat generated when the light-absorbing thin film 13 is melted causes the substrate glass 11 and Nesa glass 12 in contact with the thin film 13 to
The contact surfaces also dissolve.

Therefore, the substrate glass 11 and the Nesa glass 12 can be stably joined without being displaced.

In this case, even if float glass is doped with a few percent by weight of transition metal ions, the physical property of the glass's coefficient of thermal expansion will hardly change, so it will be resistant to changes in the environment such as temperature changes and over the long term. It is also possible to maintain a stable bonded state.

The glass sealed bonded body manufactured as described above uses a light-absorbing thin film in which float glass, which is the material of the substrate glass and Nesa Glass, is doped with transition metal ions to bond the substrate glass and Nesa Glass. Therefore, the substrate glass and Nesa glass are bonded via a light-absorbing thin film of substantially the same composition, which is a material with a coefficient of thermal expansion similar to that of the substrate glass and Nesa glass.

For this reason, it is possible to achieve stable bonding without being subject to conventional restrictions on the combination of bonding materials, and in addition, the bonded portion will not be destroyed by changes in the environment such as temperature changes or over a long period of time. Can be done.

FIG. 3 shows another embodiment of the invention. Here, an optical filter 32 for wavelength separation is placed at a predetermined location of a glass optical waveguide 31 formed by an ion exchange method.
In order to keep the characteristics of the optical filter 32 stable, the glass body 3 is fixed with an adhesive 33.
4 is bonded around the optical filter 32 and hermetically sealed.

Generally, the glass optical waveguide 31 and glass body 34 are of the same composition. Therefore, the glass optical waveguide 31
and the glass body 34 are joined via a light-absorbing thin plate (light-absorbing thin material) 35 having the same composition.

The light-absorbing thin plate 35 turns blue when irradiated with electromagnetic waves such as gamma rays and ultraviolet rays, thereby increasing the light absorption coefficient. FIG. 4 shows the glass optical waveguide 3
1 and the glass body 34 are made of soda-lime glass, for example, and the absorption spectrum of the light-absorbing thin plate 35 is shown when the soda-lime glass is irradiated with 10b X-rays using gamma rays from cobalt-60 as a radiation source.

Then, in a state where the glass guide waveguide 31 and the glass body 34 are aligned and in contact with each other via the light absorption thin plate 35, for example, YA is applied from above the glass body 34.
By emitting 6 beams of 3 beams of the G laser beam, the glass guide waveguide 31 and the glass body 34 can be easily bonded together, as in the previous embodiment described above, and are resistant to environmental changes such as temperature changes. Also, the glass guide waveguide 31 and the glass body 34 can be bonded in a stable state over a long period of time.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As detailed above, according to the present invention, there is provided a glass sealed bonded body and a method for manufacturing the same, which can improve the reliability of the bonded portion without being limited by the bonding material. can be provided.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and FIG.
Figure 2 shows the top view of the sealed glass assembly, Figure 2 (b) shows the same side view, and Figure 2 shows the changes in the light absorption coefficient when float glass is doped with 1% by weight of various transition metal ions. FIG. 3 is a sectional view showing another embodiment of the present invention, and FIG. 4 is a diagram showing the absorption spectrum of light when soda lime glass is irradiated with gamma rays from a cobalt-60 source using a 10b X-ray. It is. 11...Substrate glass, 12...Nesa glass, 13.
... Light absorption thin film (light absorption thin material), 14 ... YAG laser beam, 31 ... Glass optical waveguide, 32 ... Optical filter, 34 ... Glass body, 35 ... Light absorption thin plate ( light absorbing thin material), 36...YAG laser light.

Claims (4)

[Claims] (1) The first and second glass transparent bodies are brought into close contact with each other through a light-absorbing thin material, and the light-absorbing thin material is melted by irradiation with laser light. What is claimed is: 1. A glass sealing assembly formed by bonding, wherein the light-absorbing thin material is made of a colored glass transparent body. (2) The light-absorbing thin material is a glass transparent body having substantially the same composition as the first and second glass transparent bodies, doped with transition metal ions and colored.
1) A sealed bonded body of glass as described above. (3) The light-absorbing thin material is a glass transparent body having substantially the same composition as the first and second glass transparent bodies, and is colored by irradiating electromagnetic waves. glass sealing joint. (4) A light-absorbing thin material made of a colored glass transparent body is arranged between the first glass transparent body and the second glass transparent body, and the light-absorbing thin material is connected to the light-absorbing thin material through the glass transparent body. A glass sealed bonded body, characterized in that the first glass transparent body and the second glass transparent body are bonded by irradiating laser light to melt the light-absorbing thin material. Production method.