CN115073015A - Processing method of glass cover plate - Google Patents

Abstract

The invention relates to the field of glass processing, and discloses a processing method of a glass cover plate, which comprises the following steps: laser processing: punching a to-be-cut line of the glass cover plate (1) by using a laser (4); acid etching: and etching the to-be-cut line by using corrosive acid liquid so as to cut off the glass cover plate (1) along the to-be-cut line. Through the technical scheme, the part of the glass affected by the laser heat can be corroded, so that the part affected by the laser heat is eliminated, the area affected by the laser heat of the glass cover plate which is cut along the line to be cut does not exist, the edge processing technology of the glass cover plate is not needed, and the production efficiency and the yield are improved.

Description

Processing method of glass cover plate

technical field

The invention relates to the field of glass processing, in particular to a processing method of a glass cover plate.

Background technique

With the rapid development of flexible display technology, foldable flexible screens are gradually favored by the market. The traditional cover glass cannot be used because it is too thick and cannot be folded, but when the thickness of the glass is less than 0.1mm, it has flexibility. Flexible glass UTG (Ultra Thin Glass). Ultra-thin flexible glass has the characteristics of good bendability, good transparency, heat resistance and stability, and high hardness.

At present, glass manufacturers have produced 0.02mm ultra-thin flexible glass with a minimum bending radius of 1.5mm. Ultra-thin glass can become an ultra-thin flexible cover after multiple processes such as cutting, strengthening, compounding, and cleaning. At present, laser cutting is usually used in UTG processing, but after laser cutting is completed, a heat-affected zone of more than 2 μm will be generated on the edge. This area will have an adverse effect on the bending radius and bending times, so some process steps are needed to remove this area. area, resulting in cumbersome process, low production efficiency and low yield.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a processing method for a glass cover plate, so as to solve the problem that a heat-affected zone is easily generated when laser cutting glass.

In order to achieve the above purpose, the present invention provides a processing method of a glass cover plate, the processing method includes: laser treatment: using a laser to make holes on the line to be cut of the glass cover plate; acid etching: using an etching acid solution to The to-be-cut line is etched to cut the glass cover plate along the to-be-cut line.

Optionally, the laser is a femtosecond laser or a picosecond laser.

Optionally, the processing method includes applying a coating before the laser treatment, and the coating includes: applying an acid-proof coating on the surface of the glass cover, the acid-proof coating The layer is located in an area outside the line to be cut to form a gap at the line to be cut.

Optionally, the acid-proof coating has a thickness of 10 μm-100 μm.

Optionally, the width of the gap is 0.01mm-2mm.

Optionally, the processing method includes performing a first cleaning inspection before the coating is applied.

Optionally, the laser processing includes arranging the glass cover plate on a glass stage, the glass stage adsorbs the glass cover plate, and the glass stage is provided with a line aligned with the to-be-cut line groove.

Optionally, the acid etching includes etching the glass cover plate using a flowing etching acid solution.

Optionally, the processing method includes performing a second cleaning after the acid etching, and the second cleaning includes: stacking glass cover plates on a cleaning rack at intervals, placing the cleaning rack in Cleaning in a washing machine to remove corrosive acids and acid-resistant coatings.

Optionally, the processing method includes performing chemical strengthening after the second cleaning, and the chemical strengthening includes: placing the glass cover plate in a strengthening solution for strengthening.

Through the above technical solution, the part of the glass that is affected by the laser heat can be etched away, thereby eliminating the heat-affected part, so that the glass cover plate disconnected along the to-be-cut line does not have an area affected by the laser heat. The edge treatment process of the glass cover plate is carried out, which improves the production efficiency and the yield rate.

Description of drawings

1 is a perspective view of a glass cover plate and an acid-proof coating according to an embodiment of the present invention;

2 is a perspective view of a glass cover plate and a laser according to an embodiment of the present invention;

3 is a perspective view of a cleaning rack and a glass cover according to an embodiment of the present invention.

Description of reference numerals

1 Glass cover 2 Acid-proof coating

3 Gap 4 Laser

5 Glass stage 6 Washing rack

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

This solution provides a processing method for a glass cover plate, wherein the processing method includes:

Laser processing: use the laser 4 to make holes on the to-be-cut line of the glass cover 1;

Acid etching: etching on the to-be-cut line with an etching acid solution to cut the glass cover plate 1 along the to-be-cut line.

The glass cover plate 1 needs to be cut into multiple parts along the line to be cut, and the glass cover plate 1 can be an ultra-thin flexible and foldable glass cover plate or other glass cover plates with a smaller thickness.

The laser 4 can emit pulsed laser, and the pulsed laser can punch holes on the surface of the glass cover plate 1. The holes can be through holes or blind holes, and the laser 4 can form spaced rows of holes along the line to be cut. It should be noted that the pulsed laser does not directly cut the glass cover, but only forms spaced holes.

During the acid etching treatment, an etchant acid solution capable of corroding the glass material is placed at the line to be cut, and the etchant acid solution enters the hole punched by the laser to corrode the glass cover plate around the hole, and as the hole is corroded, the By expanding, the adjacent holes are connected, thereby realizing the cutting of the glass cover plate 1 . The cutting of the glass cover plate 1 is realized by acid etching treatment on the basis of laser treatment.

In particular, in the through hole or blind hole formed by the pulsed laser, the part of the glass affected by the laser heat can be etched away during the etching process of the etching acid solution to the surrounding, thereby eliminating the part affected by the heat, making the The glass cover plate disconnected along the line to be cut does not have an area affected by the laser heat, and the edge processing process of the glass cover plate is no longer required, thereby improving production efficiency and yield.

Wherein, the etching acid can be hydrofluoric acid or other acid that can corrode glass.

Wherein, the laser 4 is a femtosecond laser or a picosecond laser. The laser 4 can be an ultrafast laser, and can emit a femtosecond laser or a picosecond laser, so as to better control the energy of the laser and reduce the thermal influence on the surroundings.

In addition, the processing method includes applying a coating layer before the laser treatment, and the coating layer includes: applying an acid-proof coating 2 on the surface of the glass cover plate 1 , the acid-proof coating The layer 2 is located in an area outside the line to be cut to form a gap 3 at the line to be cut. Referring to FIG. 1 , a plurality of acid-proof coatings 2 are spaced apart from each other to form gaps 3 . During laser processing, the laser perforates the line to be cut in the gap 3 . The acid-proof coating 2 is used to prevent the corrosive acid from contacting the glass cover 1 outside the line to be cut (with a certain width), so that the corrosive acid only corrodes the glass cover 1 at the line to be cut, so as to follow the line to be cut. Cut cover glass 1. The acid-proof coating 2 may be formed by coating with an acid glue. Of course, the etching acid will not completely corrode the glass cover plate 1 between the gaps 3. When the glass cover plate 1 is etched and cut off, there is a small amount of exposed part at the edge of the acid-proof coating 2. The acid-resistant coating 2 can be made of acid-resistant protective ink.

Among them, the coating operation can be performed only on one surface of the glass cover plate 1, and the laser treatment and acid etching operations can be performed only on this surface; of course, the coating can also be performed on the two surfaces respectively. Coating operations, and laser treatment and acid etching operations were performed on both surfaces, respectively.

Wherein, the thickness of the acid-proof coating 2 is 10 μm-100 μm. The thickness of the acid-proof coating 2 needs to ensure that it will not be penetrated by the corrosive acid, therefore, it should not be too thin, and it should not be too thick, so that it can be easily removed during subsequent processing.

Wherein, the width of the gap 3 is 0.01mm-2mm. The width of the gap 3 corresponds to the width of the glass cover plate 1 that the etching acid solution can contact. The width of the gap 3 can be determined according to the size of the heat-affected area caused by the laser during drilling, so as to ensure that the heat-affected area is completely etched away. The width of the gap 3 may be larger than the width of the etched part, and the exposed part that is not etched can be easily clamped, for example, clamped by the cleaning rack described below for cleaning operation.

Wherein, the processing method includes performing a first cleaning inspection before the coating is applied. Between coating, the cover glass 1 can be cleaned to keep the surface of the cover glass 1 clean; after it is detected that the cleanliness of the surface of the cover glass 1 reaches the standard, the coating operation can be performed.

Optionally, referring to FIG. 2 , the laser processing includes disposing the cover glass 1 on a glass stage 5 , the glass stage 5 adsorbs the cover glass 1 , and the glass stage 5 5 is provided with a groove aligned with the line to be cut. A vacuum suction port may be provided on the glass stage 5 to absorb the glass cover plate 1 , so as to realize the relative fixation of the glass cover plate 1 and ensure the flatness of the glass cover plate 1 . In addition, a groove is provided on the glass stage 5, and when the glass cover plate 1 is placed on the glass stage 5, the line to be cut is aligned with the groove, and when the pulsed laser emitted by the laser 4 penetrates the to-be-cutted glass cover plate 1 After the line, the grooves can avoid the pulsed laser, so as to prevent the pulsed laser from damaging the glass stage 5 .

Optionally, the acid etching includes etching the glass cover plate 1 by using a flowing etching acid solution. During acid etching, the etching acid can be made to flow relative to the glass cover plate 1 to improve the etching efficiency.

In addition, the processing method includes performing a second cleaning after the acid etching, and the second cleaning includes: arranging the glass cover plates 1 on the cleaning rack 6 at intervals, and placing the cleaning rack 6 on the cleaning rack 6 . It is cleaned in a cleaning machine to remove corrosive acids and acid-proof coatings2. Referring to FIG. 3 , the glass cover plates 1 are arranged on the cleaning rack 6 at a distance from each other, so as to avoid adhesion of adjacent glass cover plates 1 . The cleaning rack 6 clamps the uncoated portion of the edge of the glass cover plate 1 to support a plurality of glass cover plates 1 and allows the cleaning liquid to enter between adjacent glass cover plates 1 to clean the glass cover plates 1 The surface of the glass cover plate 1 is cleaned to wash off the residual corrosive acid solution and the acid-proof coating 2, so that the surface of the glass cover plate 1 is kept clean. The second cleaning can be performed in a plurality of cleaning tanks containing different types of cleaning liquids to improve the cleanliness. In addition, ultrasonic cleaning machine can be used for cleaning to improve cleaning efficiency.

In addition, the processing method includes chemical strengthening after the second cleaning, and the chemical strengthening includes: placing the glass cover plate 1 in a strengthening solution for strengthening. The cleaned glass cover plate 1 can be put into the potassium nitrate solution prepared in the strengthening furnace for chemical strengthening, so as to improve the surface hardness of the glass cover plate 1 .

The preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings, however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed in the present invention, and all belong to the protection scope of the present invention.

Claims (10)

1. A processing method of a glass cover plate is characterized by comprising the following steps:

laser processing: punching a to-be-cut line of the glass cover plate (1) by using a laser (4);

acid etching: and etching the to-be-cut line by using corrosive acid liquid so as to cut off the glass cover plate (1) along the to-be-cut line.

2. The method of processing a glass cover plate according to claim 1, characterized in that the laser (4) is a femtosecond laser or a picosecond laser.

3. The method for processing a glass cover plate according to claim 1, characterized in that it comprises, before the laser treatment, a coating of a coating comprising: and coating an acid-proof coating (2) on the surface of the glass cover plate (1), wherein the acid-proof coating (2) is positioned in the area outside the line to be cut so as to form a gap (3) at the line to be cut.

4. A method for processing a glass cover plate according to claim 3, characterized in that the thickness of the acid-proof coating (2) is 10 μm to 100 μm.

5. A method for processing a glass cover plate according to claim 3, characterized in that the width of the gap (3) is 0.01 mm-2 mm.

6. A method for processing a glass cover plate according to claim 3, characterized in that it comprises a first cleaning check before the application of the coating.

7. The method according to claim 1, wherein the laser treatment comprises arranging the glass cover plate (1) on a glass carrier (5), the glass carrier (5) absorbing the glass cover plate (1), and the glass carrier (5) being provided with grooves aligned with the lines to be cut.

8. Method for processing a glass cover plate according to claim 1, characterized in that the acid etching comprises etching the glass cover plate (1) using a flowing etching acid.

9. The method for processing a glass cover plate according to claim 1, wherein the processing method comprises performing a second cleaning after the acid etching, the second cleaning comprising: the glass cover plates (1) are arranged on a cleaning frame (6) at intervals in a laminated mode, and the cleaning frame (6) is placed into a cleaning machine to be cleaned so as to remove the corrosive acid liquid and the acid-proof coating (2).

10. The method for processing a glass cover plate according to claim 9, characterized in that the processing method comprises performing chemical strengthening after the second cleaning, the chemical strengthening comprising: and placing the glass cover plate (1) in a strengthening solution for strengthening.

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