JP3263128B2 - Processing of thin glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a thin glass by cutting a thin glass using a sand blaster.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a thin glass having a specific shape by processing a thin glass, a mask having a specific shape is attached to the thin glass, and a portion having no mask is removed by sandblasting. A method for producing a thin glass sheet having a specific shape is used.

[0005] A processing method using a conventional sandblaster will be described in detail with reference to FIGS. 5 and 6. First, the thickness
As shown in FIG. 5 (a), a thin glass 1 having a thickness of about 2 mm is formed on a thin glass 1 having a thickness of about 2 mm by using an adhesive such as thermosetting, UV-curing or anaerobic. Paste on the board 12. The adhesive 11 used here is
What is soluble in a solvent is used so that the processed thin glass 1 can be peeled off.

[0005] Next, as shown in FIG. 5 (b), a mask 6 of a specific shape made of a material that can withstand the processing in the sandblasting process, for example, a rubber sheet is applied to the thin glass adhered to the glass plate 12 for the back stay. Form. This mask may be formed by attaching a mask formed in a specific shape, or by forming a resist film over the entire surface and patterning it by a photolithography process.

[0005] After that, when processing (sand blasting) by spraying a powder of alumina or the like is performed, as shown in FIG. 6, an unmasked portion is shaved off, leaving only the thin glass covered by the mask.

After that, the mask 6 is peeled off, the adhesive is dissolved by a solvent, and the obtained thin glass is washed and the adhesive is removed to form a thin glass having the same shape as the mask.

[0007]

In the above-mentioned method of processing a thin glass, a washing step for removing an adhesive adhered to the thin glass is required after a sand blasting step, so that equipment is required. In addition, there is a problem that a defective product in which the adhesive is not completely removed occurs to lower the yield.

In addition, there is a problem that fine powder of glass by sand blasting tends to adhere to the glass, and therefore, it is liable to be defective due to dust.

Further, since the back stay glass is also shaved off by the sandblasting, there is a problem that the back stay glass cannot be reused.

Further, when the adhesive is dissolved by a solvent after the sandblasting, the obtained thin glass is disintegrated, and the thin glass is arranged in a container such as a tray so as to be easily taken out for automation in a later process. There is a problem that equipment is required.

The present invention eliminates the need for the step of removing the adhesive adhered to the thin glass by washing as described above and the step of arranging the processed thin glass, and the novel thin glass processing wherein fine glass powder does not adhere to the product. The purpose is to provide the law.

[0012]

Means for Solving the Problems A method for processing thin glass using a sand blaster according to the present invention is a method for cutting thin glass using a sand blaster. , Sandblast pressure
The support plate has elasticity to absorb
Bonded with double-sided adhesive tape to protect from Engineering, (b) a mask is formed thin plate glass, (c) was cut with the thin glass by sandblasting, be separated from the support plate (d) is the thin glass It is characterized by consisting of.

[0013]

In the present invention, since a flexible double-sided adhesive tape is used, the support plate has elasticity, and the support plate is not scraped even by sandblasting.

Further, since the fine powder generated by the above processing is not trapped and scattered by the exposed adhesive of the double-sided tape, it does not adhere to the thin glass product, and no defective product due to defective dust is generated.

Further, when an adhesive layer whose adhesive strength is weakened by heat treatment or the like is used as an adhesive for bonding the thin glass, the thin glass is separated from the support plate by performing a heat treatment after sandblasting. So that
By performing the peeling step on the tray, the cut thin glass products are arranged on the tray in an aligned state, and the arrangement step can be omitted.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for forming a thin glass using the sandblaster of the present invention will be described with reference to FIG.

The thin glass plate 1 is made of borosilicate glass and has a thickness of 0.2 to 1.0 mm and is used for a window of emitted light such as a laser cap of a semiconductor laser.
Can be used as long as a flat surface can be obtained, for example, a metal plate such as aluminum, a plastic plate such as polypropylene,
Glass plates and the like can be mentioned. Among the support plates, a glass plate is preferable because a flat surface is easily obtained at low cost.

In the present invention, the thin glass 1 and the support plate 3
Is characterized by being adhered with a double-sided adhesive tape 2.

One of the adhesive surfaces of the double-sided adhesive tape, which adheres to the thin glass 1, is formed of a foamed pressure-sensitive adhesive layer 2 a which loses its adhesive strength by heat treatment, and the other surface which adheres to the support plate 3 is At a temperature at which the adhesive strength of the adhesive surface 2a to the thin glass 1 is lost, the adhesive layer 2b is formed of a normal pressure-sensitive adhesive layer 2b with no change in adhesive strength, and the intermediate layer 2c is formed of a base film. As a specific example, for example, double-sided adhesive tape 3195M (manufactured by Nitto Electric Industries, Ltd.,
One surface is formed of a foamed pressure-sensitive adhesive layer 2a as shown in (trade name), and when heated to 120 ° C., expands and expands, the bonding surface becomes indefinite, and the adhesive is peeled off. On the other hand, the other surface is formed of a normal pressure-sensitive adhesive layer 2b such as an acrylic or rubber type. Therefore, even if the temperature is raised to about 120 ° C., no change occurs in the adhesive strength, the adhesive strength of the foamed adhesive layer 2a alone is lost, and only one surface is peeled off.

The adhesive tape whose adhesive force on one side only decreases with an increase in temperature is not limited to the foaming property, but may be any adhesive that loses its adhesive force with an increase in temperature. For example, an adhesive whose adhesive strength is reduced due to such factors may be used.

In the glass processing method of the present invention, first, the thin glass 1 and the support plate 3 are bonded by the double-sided adhesive tape 2.

After the thin glass 1 is attached to the support plate 3 with the double-sided adhesive tape 2, the thin glass 1
As shown in (b), a mask 6 having a predetermined shape having adhesiveness is formed in a predetermined arrangement.

As the mask, any mask that has been conventionally used for sandblasting a glass plate can be used.
Any of them can be used. Specific examples thereof include a rubber sheet and the like, and the thickness thereof is usually about 0.5 to 1 mm. This mask may be formed by forming a resin mask such as a resist film on one surface and patterning it by a photolithography process without attaching a preformed mask.

After the mask forming step, the thin glass 1 is subjected to sandblasting. The sandblasting is performed under the same conditions as those conventionally performed.

Although the mask is not formed by the sand blasting process and the portion where the thin glass 1 is exposed is scraped off, the mask is not scraped off because it has elasticity.
The portion covered by the mask remains in the same shape.

Further, in the conventional sand blasting, the back stay glass is scraped off, so that there is a problem that it cannot be reused. However, in the processing method of the present invention, the double-sided adhesive stuck on the support plate 3 is used. Since the tape has the foamed adhesive formed on the base film as described above and has elasticity, the tape absorbs the pressure of the sand blast and is not cut off, so that the support plate 3 is not damaged. Therefore, the support plate 3 can be used repeatedly.

As described above, since the double-sided adhesive tape which has been exposed after the thin glass has been scraped off has elasticity and remains as it is, the glass fine powder 8 generated by the sand blasting process is as shown in FIG. It does not scatter when trapped by adhesive tape. Therefore, even if you remove the mask,
The glass fine powder is not released and reattached to the thin glass 1, and no defective products due to defective products are generated.

After the completion of the sandblasting, the mask 6 on the thin glass 1 is peeled off. As a method of peeling, for example, as shown in FIG. 3, there is a method in which a tape is adhered to a mask using a mask peeling tape 9 and peeled.

After that, the thin glass product is obtained by peeling off the remaining thin glass. When an adhesive whose adhesive strength is weakened by heating the adhesive surface 1a of the double-sided adhesive tape to the thin glass 1 is used for peeling the thin glass, the mask is peeled off, and then the same as the mask. The support plate 3 in which the thin glass sheet is left,
As shown in FIG. 4A, the thin glass 1 is placed on the receiving tray 10 so that the lower side thereof is on the lower side, and the heat treatment is performed. This heat treatment is performed at about 100 to 120 ° C. for about 10 to 20 minutes, so that the foamed adhesive expands and expands, and the processed thin glass sheet 1 peels and falls into the receiving tray 10 (FIG. 4 (b)). )reference).

By the above-mentioned stripping treatment of the thin glass 1 by heating, the thin glass products, which have been subjected to the sandblasting, are arranged on the receiving tray 10 as if the masks 6 were initially arranged.

Therefore, the thin glass products can be arranged on the receiving tray 10 in accordance with the arrangement of the masks 6 formed first, and the step of rearranging the products as in the prior art can be omitted. In addition, since the adhesive area is reduced due to foaming on the adhesive surface side, the adhesive strength is reduced and the adhesive is separated, the adhesive surface is separated from the thin glass, and the adhesive is peeled cleanly without adhering to the back surface of the thin glass. Therefore, a step of a cleaning process using a solvent for removing the adhesive is not required.

[0032]

According to the method for processing thin glass using the sandblaster of the present invention, cleaning of a thin glass product with a solvent, which has been conventionally performed, becomes unnecessary.

Further, since the fine powder by the sand blasting process is trapped by the double-sided adhesive tape, there is no dust defect due to the adhesion of the fine powder to the thin glass product.

Further, by using a double-sided adhesive tape whose adhesive strength only to the adhesive surface with the thin glass is weakened by heating or the like, the obtained thin glass product is arranged in a receiving tray or the like by a peeling treatment by heating or the like. And immediately used for automation in the next process.

Further, since the support plate is not cut off in the sandblasting process, it can be used repeatedly.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one step of a method for processing thin glass using a sandblaster of the present invention.

FIG. 2 is a cross-sectional view showing one step of a method for processing thin glass of the present invention.

FIG. 3 is an explanatory view showing a step of removing a mask, which is one step of the method for processing a thin glass sheet of the present invention.

FIG. 4 is an explanatory view showing a step of receiving a thin glass product in a tray, which is one step of the method of processing a thin glass according to the present invention.

FIG. 5 is a perspective view showing one step of a method for processing thin glass using a conventional sandblaster.

FIG. 6 is a cross-sectional view showing one step of a conventional thin glass processing method.

[Description of Signs] 1 Thin glass 2 Double-sided adhesive tape 2a Foamed pressure-sensitive adhesive layer 2b Normal pressure-sensitive adhesive layer 3 Support plate 6 Mask

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B24C 1/04 C03B 33/02

Claims (2)

(57) [Claims] 1. A thin glass processing method for cutting a thin glass using a sand blaster, wherein (a) a supporting plate and a thin glass are subjected to a sandblast pressure.
The support plate has elasticity to absorb
Bonded with double-sided adhesive tape to protect from Engineering, (b) a mask is formed thin plate glass, (c) by a sand blaster cutting the sheet glass, it is peeled off from the support plate (d) is the thin glass Of thin glass using a sandblaster consisting of 2. A forming an adhesive layer the adhesive strength is weakened by heat treatment of the adhesive of the thin glass side of the double-sided adhesive tape, by the heat treatment of the adhesive of the support plate side of the double-sided adhesive tape 2. The processing method according to claim 1, wherein the thin glass sheet is peeled off from the support plate by a heat treatment by forming an adhesive layer whose adhesive strength does not become weak at a temperature.