CN112960899A - Glass breaking method and glass product - Google Patents
Glass breaking method and glass product Download PDFInfo
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- CN112960899A CN112960899A CN202110270386.8A CN202110270386A CN112960899A CN 112960899 A CN112960899 A CN 112960899A CN 202110270386 A CN202110270386 A CN 202110270386A CN 112960899 A CN112960899 A CN 112960899A
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- 239000011521 glass Substances 0.000 title claims abstract description 173
- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000000758 substrate Substances 0.000 claims abstract description 75
- 238000000608 laser ablation Methods 0.000 claims abstract description 37
- 238000003698 laser cutting Methods 0.000 claims abstract description 24
- 206010041662 Splinter Diseases 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000007650 screen-printing Methods 0.000 claims abstract description 14
- 238000007639 printing Methods 0.000 claims description 19
- 238000005498 polishing Methods 0.000 claims description 6
- 238000002679 ablation Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000003426 chemical strengthening reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000006058 strengthened glass Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/0222—Scoring using a focussed radiation beam, e.g. laser
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Laser Beam Processing (AREA)
Abstract
The application discloses a glass sheet splitting method and a glass product, wherein the method comprises the steps of forming a contour line of the glass product on a glass substrate through laser cutting, carrying out silk-screen printing treatment on the reverse side of the glass substrate, and covering ink on the contour line; removing the ink distributed in the contour line by using a laser ablation mode; cutting the glass substrate outside the contour line by using a laser cutting mode to form a splinter auxiliary line formed by continuous micropores; and removing the glass substrate outside the contour line through the auxiliary splinter line to obtain the glass product. According to the method, the ink in the contour line is removed in a laser ablation mode, then the glass substrate in the area outside the contour line is subjected to laser cutting to form the splitting auxiliary line, and the splitting difficulty can be effectively reduced when the glass substrate is split by the splitting auxiliary line; because the contour line is internally provided with no ink, the conditions of broken glass and edge breakage of the glass product can be reduced, and meanwhile, the conditions of peeling, saw teeth and the like of the ink at the edge of the glass product are avoided, so that the appearance quality of the ink is improved.
Description
Technical Field
The application relates to the technical field of glass panel processing, in particular to a glass sheet splitting method and a glass product.
Background
The glass product is widely applied to mobile terminal equipment such as smart phones and tablet computers, and glass needs to be subjected to splitting treatment in order to obtain the glass product meeting the shape requirement. At present, in the splitting process, the glass product with the contour line obtained by laser cutting needs to be subjected to screen printing before splitting, and a screen printing plate usually extends to cover the contour line of the glass product formed by laser cutting during screen printing so as to avoid the phenomenon of printing and light transmission leakage at the edge caused by printing deviation. After screen printing ink, printing ink can enter into the gap of contour line, and the contour line that relaxes originally can be cohered by printing ink again, and printing ink is through the high temperature baking solidification back, and the degree of difficulty that directly carries out the lobe of a leaf along the contour line increases, and the broken piece, the bad condition of collapsing the edge increase to there are micro crack, deckle edge and sawtooth in glass product edge printing ink microcosmically.
Therefore, how to solve the above technical problems should be a great concern to those skilled in the art.
Disclosure of Invention
The application aims to provide a glass splitting method and a glass product, so that the splitting difficulty is reduced, the yield of the glass product is improved, and the appearance quality of ink at the edge of the glass product is improved.
In order to solve the technical problem, the application provides a glass breaking method, which comprises the following steps:
forming a contour line of a glass product on a glass substrate in a laser cutting mode, and carrying out silk-screen printing treatment on the reverse side of the glass substrate, wherein the contour line is covered with printing ink;
removing the ink distributed in the contour line by using a laser ablation mode;
cutting the glass substrate outside the contour line by using a laser cutting mode to form a splinter auxiliary line formed by continuous micropores;
and removing the waste glass substrate pieces outside the contour line through the splitting auxiliary line to obtain the glass product.
Optionally, after the removing the ink distributed in the contour line by using the laser ablation method, the method further includes:
and ablating the printing ink on the two sides of the contour line by using a laser ablation mode to form a laser ablation line.
Optionally, when the two sides of the contour line are ablated, the number of ablation turns is 2-4 turns, each turn is ablated for 4-6 times, and the width of the laser ablation line is between 0.03mm and 0.06mm, including all end points.
Optionally, the distance between the splinter auxiliary line and the contour line is between 0.3mm and 0.5mm, including end point values.
Optionally, the removing the ink distributed in the contour line by using a laser ablation method includes:
and removing the ink distributed in the contour line by using laser generated by an ultraviolet laser above nanosecond level.
Optionally, the cutting the glass substrate outside the contour line by using a laser cutting method includes:
and cutting the glass substrate outside the contour line by using laser generated by an infrared picosecond laser.
Optionally, after the step of cutting the glass substrate outside the contour line to form a splitting auxiliary line formed by continuous micro-holes, the method further includes:
and removing the ink residues and the glass residues on the glass substrate by using ultrasonic waves.
Optionally, before the polishing the contour line, the method further includes:
forming at least two positioning marks on the surface of the glass substrate to be processed;
correspondingly, the removing the ink distributed in the contour line comprises:
determining the position of the positioning mark on the glass substrate to be processed according to a visual positioning method;
and determining the position of the contour line according to the position, and removing the printing ink distributed in the contour line.
Optionally, the number of the ink layers is four, in the direction away from the glass substrate, the first three layers are colored ink, and the fourth layer is black ink.
The application also provides a glass product obtained by the glass breaking method.
The application provides a glass lobe of a leaf method, includes: forming a contour line of a glass product on a glass substrate through laser cutting, and carrying out silk-screen printing treatment on the reverse side of the glass substrate, wherein ink covers the contour line and is removed in the contour line in a laser ablation mode; cutting the glass substrate outside the contour line by using a laser cutting mode to form a splinter auxiliary line formed by continuous micropores; and removing the glass substrate outside the contour line through the splinter auxiliary line to obtain the glass product.
Therefore, after the glass substrate is obtained, the glass substrate is firstly removed by using a laser ablation mode, then the glass substrate in the area outside the contour line is subjected to laser cutting to form a splitting auxiliary line, the splitting difficulty can be effectively reduced when the glass substrate is subsequently split by the splitting auxiliary line, and due to the fact that no ink exists in the contour line, the conditions of breakage and edge breakage are reduced, the yield of the glass product is improved, meanwhile, the conditions of peeling, sawtooth and the like do not exist in the ink at the edge of the glass product, and the appearance quality of the ink is improved.
The present application further provides a glass product.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a glass breaking method according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a silk-screen surface of a glass substrate after ink is silk-screen;
FIG. 3 is a schematic view of a screen printed surface after laser ablation lines are formed on a glass substrate;
FIG. 4 is a schematic view of a non-screen printed surface of a glass substrate after laser ablation lines are formed;
FIG. 5 is a schematic view of a screen printing surface after a glass substrate is formed with a splinter assist line;
FIG. 6 is a schematic view of a glass substrate breaking;
FIG. 7 is a microscopic view of an edge of a glass product obtained by the glass breaking method of the present application;
FIG. 8 is a microscopic view of the edge of a glass product made using the prior art;
fig. 9 is a partial cross-sectional view of a glass substrate when laser ablation lines are formed.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As described in the background section, at present, when the glass is cracked, ink exists in gaps of a contour line, the difficulty of cracking the glass directly along the contour line is increased, the defective edge breakage conditions are increased, and micro cracks, burrs and sawteeth exist on the edge of the glass product in microcosmic terms.
In view of the above, the present application provides a glass breaking method, please refer to fig. 1, where fig. 1 is a flowchart of a glass breaking method provided in an embodiment of the present application, the method including:
step S101: the method comprises the steps of forming contour lines of glass products on a glass substrate in a laser cutting mode, carrying out silk-screen printing on the reverse side of the glass substrate, and covering the contour lines with printing ink.
It should be noted that the contour lines are formed by continuous pores penetrating the thickness of the glass substrate, and the shape of the contour lines depends on the shape of the glass product, which includes but is not limited to circle, rectangle, square, ellipse, and various shapes.
The schematic diagram of the silk-screen surface (reverse surface) of the glass substrate 1 in this step is shown in fig. 2, and the ink 2 is printed on the glass product by silk-screen printing, and the contour line is covered by the ink 2. The number of the ink 2 layers is four, the first three layers are colored ink and the fourth layer is black ink in the direction away from the glass substrate 1.
Step S102: and removing the ink distributed in the contour line by using a laser ablation mode.
The laser generator generates high-energy continuous laser beams, and a laser ablation path is set to act on the contour line, so that the ink on the surface of the contour line and in the gap of the contour line is instantly melted and gasified.
The ink on the surface of the contour line and in the gap of the contour line can be cut off by laser ablation, and the ink on the two sides of the contour line can not be adhered, and the ink residue or loss can not be generated after the glass is split, so that the phenomenon that the ink on the edge of a glass product generates saw teeth to influence the appearance quality of the glass product can be avoided, a microscopic image of the edge of the glass product obtained by the glass splitting method in the application is shown in fig. 7, and a microscopic image of the edge of the glass product obtained by adopting the prior art is shown in; and the inner shape structure of the contour line is not affected and the glass substrate is not damaged. It should be noted that, although the prior art uses a gas laser, such as a carbon dioxide laser, to remove the ink layer on the sapphire surface, this method is not suitable for glass processing, and if the gas laser is used to remove the ink in the contour line gap on the glass substrate, the resulting edge ink of the glass product still forms a saw-tooth shape microscopically under the heat effect of the gas laser. Preferably, laser generated by an ultraviolet laser with the nanosecond level or above is used for removing the ink distributed in the contour line, so that the accuracy of removing the ink in the contour line is improved.
In order to ensure that the ink on the contour line is completely removed, the ink bonding is cut off, and after the ink distributed in the contour line is removed by using a laser ablation method, the method further comprises the following steps:
and ablating the printing ink on the two sides of the contour line by using a laser ablation mode to form a laser ablation line. When the two sides of the contour line are ablated, the number of ablation circles is 2-4 circles, each circle is ablated for 4-6 times, and the width of the laser ablation line is between 0.03mm and 0.06mm, including all end points.
In this step, a schematic view of the silk-screen surface of the glass substrate is shown in fig. 3, a schematic view of the non-silk-screen surface (front surface) of the glass substrate 1 is shown in fig. 4, both front and back surfaces of the glass substrate 1 are provided with laser ablation lines 3, an area within the laser ablation lines 3 is a glass product 4, a schematic cross-sectional view of the glass substrate when the laser ablation lines 3 are formed is shown in fig. 9, and the width of the laser ablation lines 3 is larger than the width of the contour lines 8.
Step S103: and cutting the glass substrate outside the contour line by using a laser cutting mode to form a splinter auxiliary line formed by continuous micropores.
Preferably, the glass substrate outside the contour line is cut by laser generated by an infrared picosecond laser, so as to improve the cutting precision when cutting the splitting auxiliary line.
The splinter auxiliary line is positioned in the area outside the contour line and does not act on the contour line of the glass product, thereby ensuring the strength of the glass product.
Optionally, the distance between the splinter assisting line and the contour line is between 0.3mm and 0.5mm, including end points, for example, 0.35mm, 0.4mm, 0.45mm, etc., so as to avoid cutting the splinter assisting line to the inner side of the contour line of the glass product.
The schematic diagram of the non-silk-screen printing surface of the glass substrate in the step is shown in fig. 5, and the splinter auxiliary line 5 is in the area outside the contour line of the glass substrate 1.
Ink residue and glass residue generated during laser ablation and laser cutting are attached on a glass substrate, and in order to obtain a clean glass product, after the glass substrate positioned outside the contour line is cut to form a splitting auxiliary line formed by continuous micropores, the method further comprises the following steps:
and removing the ink residues and the glass residues on the glass substrate by using ultrasonic waves.
Step S104: and removing the waste glass substrate pieces outside the contour line through the splitting auxiliary line to obtain the glass product.
Since the ink 2 in the contour line has been ablated by the laser, and the splinter assisting line 5 exists, the glass substrate waste 7 in the area other than the glass product can be easily removed by hand in this step, and the glass product 2 is obtained, as shown in fig. 6.
The processing of the glass substrate in step S101 will be described in detail below.
Step S1011: and cutting the glass substrate by using a laser cutting mode to form a contour line.
Step S1012: and (5) polishing the contour line.
The purpose of polishing the contour line is to increase the width of the contour line, eliminate microcracks formed by laser cutting on the contour line and effectively improve the strength of a glass product.
Step S1013: and strengthening the cut glass substrate to meet the strength condition required by the glass product.
Optionally, the glass substrate is strengthened by chemical strengthening, and the specific strengthening process is well known to those skilled in the art and will not be described in detail herein.
Step S1014: printing ink is printed on the back surface of the strengthened glass substrate in a screen printing mode, and the printing ink expands a preset distance along the contour line so that the printing ink is distributed in the contour line and the area inside the contour line.
It should be noted that, the preset distance is not specifically limited in this application, and may be set by itself, for example, the preset distance may be 0.5mm, 0.6mm, and the like.
Further, before the polishing the contour line, the method further includes:
forming at least two positioning marks on the surface of the glass substrate to be processed;
correspondingly, the removing the ink distributed in the contour line comprises:
determining the position of the positioning mark on the glass substrate to be processed according to a visual positioning method;
and determining the position of the contour line according to the position, and removing the printing ink distributed in the contour line.
Alternatively, the positioning mark 6 may be shaped as a circle, as shown in fig. 2.
According to the glass splitting method, after the glass substrate is obtained, the ink in the contour line of the glass product is removed in a laser ablation mode, then the glass substrate in the area outside the contour line is subjected to laser cutting to form a splitting auxiliary line, the difficulty of splitting can be effectively reduced when the glass substrate is subsequently split through the splitting auxiliary line, the condition of poor edge breakage is reduced due to the fact that no ink exists in the contour line, the yield of the glass product is improved, meanwhile, the conditions of peeling, saw teeth and the like of the ink at the edge of the glass product do not exist, and the appearance quality of the ink is improved.
The glass breaking method is explained below in a specific case.
And 2, chemically strengthening the area where the glass product is located.
And 3, printing 4 layers of ink by adopting a screen printing mode, wherein the ink expands by 0.5mm along the contour line, 1 to 3 layers of color ink and the 4 th layer of black ink are provided, and the total thickness of the ink is about 0.04 mm.
And 4, grabbing the positioning mark on the glass substrate by using a visual positioning system, calibrating the position of the positioning mark, further determining the position of the contour line, ablating and gasifying the ink covered on the contour line by adopting an ultraviolet laser above nanosecond level, then performing laser ablation on the contour line and two sides for 3 circles, and ablating for 6 times in each circle to form a laser ablation line with the width of about 0.045 mm.
And 5, forming a plurality of splinter auxiliary lines beneficial to splinting by adopting an infrared picosecond laser, wherein the distance between the splinter auxiliary lines and the contour line is kept at 0.5 mm.
And 6, cleaning the glass substrate subjected to laser ablation and laser cutting by adopting ultrasonic waves.
And 7, splitting off a plurality of waste materials divided by the splitting auxiliary lines to obtain the required silk-screen glass product.
In order to verify the quality of the glass product obtained by the splitting method of the present application, three comparative examples were used for splitting, and the quality of the glass product was compared, and the comparison results are shown in table 1.
Comparative example 1
Compared with the cracking method described above in the present application, the present embodiment is different in that: the treatment of the ink in the laser ablation profile in step 4 is not included.
Comparative example 2
Compared with the cracking method described above in the present application, the present embodiment is different in that: the process of forming the splinter-assisting lines by laser cutting in step 5 is not included.
Comparative example 3
Compared with the cracking method described above in the present application, the present embodiment is different in that: the treatment of ink in the laser ablation contour line in the step 4 and the treatment of forming the splinter assisting line by laser cutting in the step 5 are not included.
As can be seen from Table 1, the glass product breaking and edge breakage after the glass product is broken can be effectively reduced by the sheet breaking method, the appearance quality of the glass product is ensured, and the yield is improved.
TABLE 1 quality inspection results of the appearance of glass products
The present application also provides a glass product obtained by the glass breaking method of any of the above embodiments.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The glass breaking method provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. A glass breaking method, comprising:
forming a contour line of a glass product on a glass substrate in a laser cutting mode, and carrying out silk-screen printing treatment on the reverse side of the glass substrate, wherein the contour line is covered with printing ink;
removing the ink distributed in the contour line by using a laser ablation mode;
cutting the glass substrate outside the contour line by using a laser cutting mode to form a splinter auxiliary line formed by continuous micropores;
and removing the waste glass substrate pieces outside the contour line through the splitting auxiliary line to obtain the glass product.
2. The glass breaking method of claim 1, wherein after the removing the ink distributed in the contour line by laser ablation, the method further comprises:
and ablating the printing ink on the two sides of the contour line by using a laser ablation mode to form a laser ablation line.
3. The glass breaking method of claim 2, wherein the ablation is performed on both sides of the contour line for 2-4 ablation cycles, 4-6 ablations per cycle, and the width of the laser ablation line is between 0.03mm and 0.06mm, inclusive.
4. The glass breaking method of claim 1, wherein the distance between the breaking auxiliary line and the contour line is between 0.3mm and 0.5mm, inclusive.
5. The glass breaking method of claim 1, wherein the removing the ink distributed in the contour line by laser ablation comprises:
and removing the ink distributed in the contour line by using laser generated by an ultraviolet laser above nanosecond level.
6. The glass breaking method of claim 1, wherein the cutting the glass substrate outside the contour line by laser cutting comprises:
and cutting the glass substrate outside the contour line by using laser generated by an infrared picosecond laser.
7. The glass breaking method according to any one of claims 1 to 6, further comprising, after the cutting the glass substrate located outside the contour line to form a breaking auxiliary line formed by continuous micro holes:
and removing the ink residues and the glass residues on the glass substrate by using ultrasonic waves.
8. The glass breaking method of claim 7, further comprising, prior to the polishing the contour line:
forming at least two positioning marks on the surface of the glass substrate to be processed;
correspondingly, the removing the ink distributed in the contour line comprises:
determining the position of the positioning mark on the glass substrate to be processed according to a visual positioning method;
and determining the position of the contour line according to the position, and removing the printing ink distributed in the contour line.
9. The glass breaking method of claim 8, wherein the number of layers of ink is four, the first three layers being colored ink and the fourth layer being black ink in a direction away from the glass substrate.
10. A glass product obtained by the glass breaking method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270386.8A CN112960899A (en) | 2021-03-12 | 2021-03-12 | Glass breaking method and glass product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270386.8A CN112960899A (en) | 2021-03-12 | 2021-03-12 | Glass breaking method and glass product |
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| CN112960899A true CN112960899A (en) | 2021-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620614A (en) * | 2021-07-27 | 2021-11-09 | 深圳市若菲特科技有限公司 | Method, device and equipment for removing ink on glass surface and storage medium |
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| CN108067744A (en) * | 2016-11-18 | 2018-05-25 | 蓝思科技（长沙）有限公司 | A kind of processing method of the sapphire wafer product of the frame containing ink |
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Application publication date: 20210615 |