JPH068145A - Processing method for sheet glass - Google Patents

Abstract

PURPOSE:To eliminate a process for washing away an adhesive deposited on sheet glass and another process for arraying the sheet glass, and prevent fine glass powder due to sandblasting from adhering to a product. CONSTITUTION:This method is for processing sheet glass, using a sandblaster. In the method, a support plate 3 and sheet glass 1 are bonded to each other with a double-side adhesive tape 2. In addition, a mask 6 is pasted to the sheet glass 1 and, then, this glass 1 is cut with the sandblaster. Thereafter, the sheet glass 1 is separated from the support plate 3 and formed.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

A conventional processing method using a sand blaster will be described in detail with reference to FIGS. 5 and 6. First the thickness
As shown in FIG. 5 (a), a thin glass sheet 1 having a thickness of 0.2 to 1.0 mm is usually used as a glass for a backstay having a thickness of about 2 mm by using an adhesive agent such as a thermosetting agent, a UV curing agent and an anaerobic agent. Stick on board 12. The adhesive 11 used here is
A solvent-soluble material is used so that the thin glass plate 1 after processing can be peeled off.

Next, as shown in FIG. 5 (b), a thin plate glass adhered to the backstay glass plate 12 is provided with a mask 6 of a specific shape made of a material such as a rubber sheet, which can withstand the work in the sandblasting process. Form. As this mask, a mask having a specific shape may be attached, or a resist film may be formed over the entire surface and patterned by a photolithography process.

After that, when processing (sandblasting) by spraying powder of alumina or the like is performed, as shown in FIG. 6, the unmasked portion is scraped off, and only the thin glass sheet of the portion covered by the mask remains.

After that, the mask 6 is peeled off, the adhesive is dissolved in a solvent, and the obtained thin glass plate is washed to remove the adhesive, thereby forming a thin glass plate having the same shape as the mask.

[0007]

In the above-described thin glass processing method, a washing step for removing the adhesive adhered to the thin glass is required after the sandblasting step, and therefore equipment for that is required. Further, there is a problem that a defective product in which the adhesive is not completely removed is generated and the yield is reduced.

Further, there is a problem in that fine powder of glass produced by sandblasting tends to adhere to the glass, resulting in a defective product due to defective dust.

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

Furthermore, when the adhesive is melted with a solvent after sandblasting, the obtained thin glass pieces are separated, and the thin glass sheets are arranged in a container such as a tray so that the thin glass sheets can be easily taken out for automation in a later process. There is a problem that equipment is required.

The present invention does not require the steps of removing the adhesive adhered to the thin glass sheet by washing and the step of arranging the processed thin glass sheets, and a novel thin glass processing in which fine glass powder does not adhere to the product. The purpose is to provide the law.

[0012]

A method of processing thin glass using a sand blaster of the present invention is a method of cutting thin glass using a sand blaster, wherein (a)
Bond the support plate and thin glass with double-sided adhesive tape,
(B) A mask is formed on the thin glass, (c) the thin glass is cut and processed by a sand blaster, and (d) the thin glass is peeled from the support plate.

[0013]

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

Further, since the fine powder generated by the above processing is trapped by the adhesive agent exposed on the double-sided tape and does not scatter, it does not adhere to the thin glass product and a defective product due to a dust defect does not occur.

Further, when a pressure-sensitive adhesive layer whose adhesion is weakened by heat treatment or the like is used as an adhesive agent for adhering the thin glass sheet, the thin glass sheet is peeled from the supporting plate by heat treatment after sandblasting. Because it is done
By performing the peeling step on the tray, the cut thin glass products are arranged on the tray in the aligned state, and the arrangement step can be omitted.

[0016]

EXAMPLE A method for forming a thin glass sheet using the sand blaster of the present invention will be described with reference to FIG.

The thin glass plate 1 has a thickness of 0.2 to 1.0 mm and is made of borosilicate glass or the like, and is used for a window of emitted light such as a laser cap of a semiconductor laser.
Can be used as long as it has a flat surface, and examples thereof include metal plates such as aluminum and plastic plates such as polypropylene,
Examples include glass plates. Among the support plates, a glass plate is preferable because it is inexpensive and a flat surface is easily obtained.

In the present invention, the thin glass plate 1 and the support plate 3 are used.
It is characterized in that and are bonded with the double-sided adhesive tape 2.

Of the adhesive surfaces of the double-sided adhesive tape, one surface that adheres to the thin glass plate 1 is formed of a foamed pressure-sensitive adhesive layer 2a that loses its adhesive strength by heat treatment, and the other surface that adheres to the support plate 3 is formed. At a temperature at which the adhesive strength of the adhesive surface 2a with the thin glass plate 1 disappears, the adhesive layer 2b is formed by a normal pressure-sensitive adhesive layer 2b, and the intermediate layer 2c is formed by a base film. As a specific example, for example, double-sided adhesive tape 3195M (manufactured by Nitto Electric Industry Co., Ltd.,
Like the product name), one surface is formed of the foamed pressure-sensitive adhesive layer 2a, and when heated to 120 ° C., it foams and expands, the adhesive surface becomes indefinite, and the adhesive is peeled off. On the other hand, the other surface is formed of an ordinary pressure-sensitive adhesive layer 2b such as acrylic or rubber. Therefore, even if the temperature is raised to about 120 ° C., the adhesive force does not change at all, the adhesive force of only the foamed adhesive layer 2a is lost, and only one surface is peeled off.

The adhesive tape whose adhesive strength on one side only decreases as temperature rises is not limited to foaming, and any adhesive that loses its adhesive strength as temperature rises may be used. Irradiation with ultraviolet rays does not mean temperature rise. For example, an adhesive whose adhesive strength is reduced may be used.

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

After the thin glass sheet 1 is attached to the support plate 3 by the double-sided adhesive tape 2, the thin glass sheet 1 is attached to the supporting plate 3 as shown in FIG.
As shown in (b), a mask 6 having a predetermined shape and having adhesiveness is formed in a predetermined array.

If the mask is a mask conventionally used for sandblasting a glass plate,
Any of them can be used, but a specific example thereof is a rubber sheet or the like, and the thickness thereof is usually about 0.5 to 1 mm. Further, 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 process, the thin glass plate 1 is sandblasted. The sandblasting is performed under the same conditions as those conventionally used.

By the sandblasting process, the mask is not formed and the exposed portion of the thin glass sheet 1 is scraped off, but the mask is not scraped off because of its elasticity.
The part covered by the mask remains in its original shape.

In the conventional sandblasting process, the back stay glass is also scraped off and cannot be reused. However, in the processing method of the present invention, the double-sided adhesive adhered on the support plate 3 is adhered. Since the tape has the foamed adhesive formed on the base film as described above and has elasticity, the tape is not scraped by absorbing the pressure of the sandblast, and therefore the support plate 3 is not damaged. Therefore, the support plate 3 can be repeatedly used.

Further, as described above, since the double-sided adhesive tape exposed by scraping off the thin glass has elasticity and remains as it is, the fine glass powder 8 generated by the sandblasting process is as shown in FIG. It is trapped by the adhesive tape and does not scatter. Therefore, even if the mask is peeled off,
The fine glass powder is not detached and reattached to the thin glass sheet 1, and a defective product due to a defective product does not occur.

After the sandblasting is completed, the mask 6 on the thin glass plate 1 is peeled off. As a method of peeling, for example, as shown in FIG. 3, a method of using a mask peeling tape 9 and adhering the tape to a mask and peeling the tape can be cited.

After that, the remaining thin glass plate is peeled off to obtain a thin glass product. In order to peel off this thin glass, if a pressure-sensitive adhesive whose adhesive surface 1a of the double-sided adhesive tape with the thin glass 1 is weakened by heating is used, the mask is peeled off, and then the same as the mask. The support plate 3 on which the thin glass sheet having a shape is left,
As shown in FIG. 4A, the thin glass plate 1 is placed on the receiving tray 10 so that the glass plate 1 is on the lower side, and heat treatment is performed. By performing this heat treatment at 100 to 120 ° C. for 10 to 20 minutes, the foamed adhesive expands and expands, and the processed thin glass sheet 1 peels off and falls into the receiving tray 10 (FIG. 4 (b). )reference).

By the peeling treatment of the thin glass sheet 1 by the above-mentioned heating, the thin glass products which have been sandblasted are arranged on the tray 10 in the same manner as the masks 6 are initially arranged.

Therefore, the thin glass products can be arranged on the receiving tray 10 in the same manner as the first formed mask 6 is arranged, and the conventional process for rearranging the products can be omitted. In addition, since the adhesive area is reduced due to foaming on the adhesive surface side and the adhesive strength is reduced and peeling occurs, the adhesive surface is peeled off from the thin glass sheet, and the adhesive is peeled off neatly without adhering to the back surface of the thin glass sheet. Therefore, the step of cleaning treatment with a solvent for removing the adhesive becomes unnecessary.

[0032]

According to the method of processing a thin glass sheet using the sand blaster of the present invention, it is not necessary to wash the thin glass product with a solvent which has been conventionally performed.

Further, since the fine powder produced by the sandblasting process is trapped in the double-sided adhesive tape, dust defects due to the fine powder adhering to the thin glass product are eliminated.

Further, by using a double-sided adhesive tape whose adhesive strength only on the surface to be adhered to the thin sheet glass is weakened by heating or the like, the obtained thin sheet glass products are directly arranged on a receiving tray or the like by peeling treatment by heating or the like. It is immediately subjected to automation for the next process.

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

[Brief description of drawings]

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

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

FIG. 3 is an explanatory diagram showing a step of peeling a mask, which is one step of the method for processing a thin glass plate 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 for processing thin glass of the present invention.

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

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

[Explanation of symbols]

 1 Thin Glass 2 Double-sided Adhesive Tape 2a Foamed Adhesive Layer 2b Ordinary Adhesive Layer 3 Support Plate 6 Mask

Claims (2)

[Claims] 1. A thin glass processing method for cutting thin glass using a sand blaster, comprising: (a) bonding a support plate and thin glass with a double-sided adhesive tape;
(B) A mask is formed on the thin glass, (c) the thin glass is cut by a sand blaster, and (d) the thin glass is peeled from the support plate. Law. 2. The adhesive on the thin glass side of the double-sided tape is formed of a pressure-sensitive adhesive layer whose adhesive strength is weakened by heat treatment, and the adhesive on the side of the supporting plate of the double-sided tape is adhered at a temperature by the heat treatment. The processing method according to claim 1, wherein the thin glass sheet is formed from a pressure-sensitive adhesive layer that does not decrease in strength, and the thin glass is peeled from the support plate by heat treatment.