CN114772940A - Method for manufacturing foldable glass by laser direct-writing micro-nano structure - Google Patents
Method for manufacturing foldable glass by laser direct-writing micro-nano structure Download PDFInfo
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- CN114772940A CN114772940A CN202210578974.2A CN202210578974A CN114772940A CN 114772940 A CN114772940 A CN 114772940A CN 202210578974 A CN202210578974 A CN 202210578974A CN 114772940 A CN114772940 A CN 114772940A
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- 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
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
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- 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
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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Abstract
The invention relates to the technical field of new glass materials, in particular to a method for manufacturing foldable glass by using a laser direct-writing micro-nano structure, which comprises the following steps: selecting and cleaning glass; performing laser etching on the position to be processed of the glass by adopting laser according to a preset processing path to form a micro-nano structure; after laser processing, putting the glass into molten salt containing potassium ions to generate a stress layer and an ion exchange layer on the surface of the glass and at a laser processing interface; and taking the glass out of the molten salt, cooling and cleaning to obtain the foldable glass. According to the invention, firstly, through laser processing, a micro-nano crack structure is generated in glass by utilizing the instantaneous high temperature generated by the interaction of high-energy laser and the glass, and then a folding rotating shaft is formed. And then carrying out ion exchange chemical enhancement on the glass subjected to laser processing to generate a pressure stress layer and an ion exchange layer in the glass, so that high-strength pressure stress on the surface of the glass and high-strength stress on a micro-nano structure part are realized, and the folding strength and the folding stability of the glass are ensured.
Description
Technical Field
The invention relates to the technical field of new glass materials, in particular to a method for manufacturing foldable glass by using a laser direct-writing micro-nano structure.
Background
In recent years, the electronic industry has developed rapidly, and various electronic products have developed endlessly, so that the requirements of people on electronic products tend to be portable and diversified in functions, and the appearance of the folding display technology attracts wide social attention. With the continuous development of electronic display technology, various performance requirements of display devices are correspondingly improved, and flexibility and foldability become important directions for the development of display industries.
The glass material has good chemical stability, light transmittance, biocompatibility and the like, and is widely applied to the manufacture of key parts in the fields of semiconductors, sensors, biomedicine, chemistry, optical communication, optical storage equipment and the like. However, due to its brittleness, cracks and defects are easily generated during the processes of etching, drilling, welding, etc. by using conventional mechanical or chemical processing methods, resulting in low processing efficiency. The appearance of a novel special processing method, namely a laser technology, can accurately focus high-energy pulses on the surface or inside of a glass material to be processed, instantly melt or gasify the material, and realize non-contact processing. Compared with the conventional processing mode, the laser technology can realize non-contact, has higher processing efficiency, precision and flexibility, and can be widely applied to the field of glass processing.
With the increasing demand for glass foldability, how to achieve stable foldability with high precision, high speed, and high quality on glass materials has become an important issue that currently restricts the development of integrated glass cover plates. At present, the existing folding glass is formed by continuously thinning glass materials, so that the stress applied to the glass during bending is not enough to cause the breakage of a silicate framework to form permanent deformation, and the glass can be bent repeatedly in a macroscopic view.
Patent CN112309266A discloses an ultra-thin flexible glass one-way folding screen for electronic products, which realizes folding of a glass body by arranging a downward concave part on the upper surface of the glass body and forming a folding part below the concave part.
The flexibility and durability of 30 μm ultra-Thin glass are enhanced by the samsung corporation by subjecting ultra-Thin flexible glass utg (ultra Thin glass) to a strengthening process. During the treatment, the uniform flexibility is ensured by injecting special materials into the ultra-thin glass.
The premise of realizing the foldability of the glass is on the basis of the ultrathin flexible glass, the foldability of the glass is difficult to realize through thinning, a large amount of manpower and material resources and time cost are consumed, and a series of problems can be caused in subsequent cutting, processing and other treatment processes. Therefore, the invention is urgently needed to provide a folding glass processing method which is simple in process, simple and convenient to operate and better in stability.
Disclosure of Invention
One of the purposes of the invention is to provide a method for manufacturing foldable glass by laser direct-writing micro-nano structure, which realizes high-strength compressive stress on the surface of the glass and high-strength stress on the micro-nano structure part so as to ensure the folding strength and folding stability of the glass, has simple process, is easy to operate, saves cost and can realize mass production.
The scheme adopted by the invention for realizing the purpose is as follows: a method for manufacturing foldable glass by using a laser direct-writing micro-nano structure comprises the following steps:
(1) selecting and cleaning glass to be processed;
(2) performing laser etching on the position to be processed of the glass according to a preset processing path by adopting laser to form a micro-nano structure;
(3) preheating the glass processed by laser, putting the glass into molten salt which is molten and contains potassium ions, and preserving heat at a certain temperature to generate a stress layer and an ion exchange layer on the surface of the glass and at a laser processing interface;
(4) and taking the glass out of the molten salt, cooling and cleaning to obtain the foldable glass.
Preferably, in the step (1), the glass to be processed is any one of silicate glass, soda-lime-silica glass, lithium-aluminum-silica glass, borosilicate glass, soda-borosilicate glass, germanate glass, tellurite glass, phosphate glass and borate glass.
Preferably, in the step (1), the thickness of the glass to be processed is 2mm or less.
Preferably, in the step (2), the laser used is a continuous laser or a pulsed laser, the wavelength is 172-4400nm, the pulse width of the pulsed laser is any one of microsecond, nanosecond, picosecond and femtosecond, the single-pulse energy of the pulsed laser is 1nJ-100mJ, and the power of the continuous laser is 0.1 mW-1000W.
Preferably, in the step (2), the width of a crack generated by laser etching in the micro-nano structure is 10nm-10 μm; the width of the laser processing area is 1 μm-5 mm.
Preferably, in the step (2), during the processing, the relative moving speed of the laser and the glass to be processed is 0.5 μm/s-5mm/s, and the action time of the laser and the glass to be processed on a single point is 100ns-2 s.
Preferably, in the step (2), the shape of the micro-nano structure is at least one of a rectangle, a circle, a triangle, a snap, a strip and an irregular shape.
Preferably, in the step (3), the molten salt containing potassium ions is KNO3Fused salt, NaNO3/KNO3Mixed molten salts, LiNO3/KNO3Mixed molten salts, RbNO3/KNO3Mixed molten salt, CsNO3/KNO3Any one of the mixed molten salts has the preheating temperature of 200-300 ℃, the heat preservation temperature of 380-500 ℃ and the heat preservation time of 30 minutes-10 hours.
Preferably, in the step (4), the foldable glass can rotate at will in the forward direction or the reverse direction at any angle and hover at any angle by taking the micro-nano structure as a folding rotating shaft, and the bending radius of the folded part is 0.1mm-10 mm.
Preferably, in the step (4), the transmittance of the prepared foldable glass micro-nano structure area in a visible light wave band is 40% -95%, and the transmittance of the glass on an unprocessed position in the visible light wave band can be 60% -95%.
The invention has the following advantages and beneficial effects:
the preparation method firstly processes the glass by laser and utilizes the interaction between high-energy laser and the glassThe generated instantaneous high temperature generates a micro-nano crack structure in the glass, thereby forming a folding rotating shaft. Then carrying out ion exchange chemical enhancement on the glass after laser processing to generate a pressure stress layer and an ion exchange layer in the glass, realizing high-strength pressure stress on the surface of the glass and high-strength stress on a micro-nano structure part so as to ensure the folding strength and the folding stability of the glass, and utilizing Na+-K+The micro expansion generated by ion exchange reduces the crack spacing and generates the stress of the rotating shaft, so that the glass can rotate at any angle of 0-180 degrees and hover. The structure of the rotating shaft is a micro-nano structure, so that the transmittance of the glass at the rotating shaft is slightly influenced. The surface CS value of the manufactured foldable glass after ion strengthening is 300-1500MPa, and the depth of the ion exchange layer is 5-150 μm.
The foldable glass prepared by the preparation method can be used in various foldable electronic devices such as televisions, displays, mobile phones and intelligent wearable devices.
Drawings
FIG. 1 is a schematic process diagram of the process of the present invention;
FIG. 2 is a schematic diagram of the large folding radius (outward folding and inward folding) (a) and the small folding radius (inward folding) (b) of the foldable glass processed by the method of the present invention;
FIG. 3 is a schematic diagram of the shape of the micro-nano structure of the foldable glass prepared by the method of the present invention;
FIG. 4 is a schematic diagram of size definition in a micro-nano structure;
fig. 5 is a schematic diagram of a foldable glass processed by laser micro-nano processing and used for a foldable display device.
Detailed Description
The following examples are provided to further illustrate the present invention for better understanding, but the present invention is not limited to the following examples.
Example 1:
a method for manufacturing foldable glass by laser direct-writing micro-nano structures is shown in figure 1, and is a schematic diagram of a process for processing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting the one to be processedBorosilicate glass having a composition of 75% SiO2、10％B2O3、6％Na2O、5％Al2O32 percent of BaO and 2 percent of CaO, the size is 300mm multiplied by 600mm, the thickness is 1mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) the wavelength of ultraviolet laser for processing glass is 365nm, the pulse width of the laser is adjusted to be 100ps, the pulse power is adjusted to be 10 mu J, and an objective lens and an ocular lens are adjusted to focus the laser on the initial position of the bottom of the glass;
(4) designing a rectangular laser processing path (figure 3, a) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the processing is finished;
(6) taking off the glass, preheating the glass at 300 ℃, and placing the glass in KNO3In the molten salt, keeping the temperature at 400 ℃ for 2 hours to generate a stress layer and an ion exchange layer on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 1 main performance parameters of foldable glass prepared in example 1
Example 2:
a method for manufacturing foldable glass by laser direct writing micro-nano structure is shown in figure 1, and is a schematic diagram of a process for manufacturing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting germanate glass to be processed, wherein the composition of the germanate glass is 15% Na2O、85％GeO2The size is 325mm multiplied by 525mm, the thickness is 2mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) processing continuous laser with visible laser wavelength of 532nm and output power of 5W, and adjusting an objective lens and an eyepiece to focus the laser on the initial position of the bottom of the glass;
(4) designing a 'circular' laser processing path (figure 3, b) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the process is finished;
(6) the glass was removed and, after preheating at 200 ℃, placed in a 50: 50NaNO3-KNO3In the mixed molten salt, keeping the temperature at 420 ℃ for 5 hours to generate a stress layer and an ion exchange layer on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 2 main performance parameters of foldable glass prepared in example 2
Example 3
A method for manufacturing foldable glass by laser direct-writing micro-nano structures is shown in figure 1, and is a schematic diagram of a process for processing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting tellurate glass to be processed, wherein the tellurate glass consists of 75% of TeO2、10％Na2O、8％PbF2、7％Bi2O3The size is 275mm multiplied by 325mm, the thickness is 0.2mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) processing glass near-infrared laser with the wavelength of 1064nm, adjusting the pulse width of the laser to 150fs and the pulse power to 25 muJ, adjusting an objective lens and an eyepiece, and focusing the laser on the initial position of the bottom of the glass;
(4) designing a triangular laser processing path (figure 3, c) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the processing is finished;
(6) the glass was removed and, after preheating at 250 ℃, placed in a 30: 70 CsNO3-KNO3In the mixed molten salt, keeping the temperature at 450 ℃ for 5 hours to generate a stress layer and an ion exchange layer on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 3 main performance parameters of foldable glass prepared in example 3
Example 4
A method for manufacturing foldable glass by laser direct-writing micro-nano structures is shown in figure 1, and is a schematic diagram of a process for processing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting borosilicate glass to be processed, wherein the composition of the borosilicate glass is as follows: 66.4% SiO2，12.3％B2O3，0.4％PbO，0.4％ZnO，8.0％Na2O，12.5％K2O, the size is 275mm multiplied by 325mm, the thickness is 0.2mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) processing glass near-infrared laser with the wavelength of 1064nm, adjusting the pulse width of the laser to 120fs and the pulse power to 10 muJ, adjusting an objective lens and an eyepiece, and focusing the laser on the initial position of the bottom of the glass; (ii) a
(4) Designing a 'buckle-shaped' laser processing path (figure 3, d) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the processing is finished;
(6) taking off the glass, preheating the glass at 300 ℃, and putting the glass into the melting furnaceKNO3In molten salt, keeping the temperature at 450 ℃ for 3 hours to generate a stress layer and an ion exchange layer on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 4 main performance parameters of foldable glass prepared in example 4
Example 5
A method for manufacturing foldable glass by laser direct-writing micro-nano structures is shown in figure 1, and is a schematic diagram of a process for processing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting the silicate ultrathin glass to be processed, wherein the composition of the silicate ultrathin glass is 75% SiO2、10％B2O3、6％Na2O、5％Al2O32 percent of BaO and 2 percent of CaO, the size is 275mm multiplied by 325mm, the thickness is 0.03mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) processing glass near-infrared laser with wavelength of 1064nm, adjusting laser pulse width of 100fs and pulse power of 10 muJ, adjusting objective lens and eyepiece to focus laser on the initial position of the bottom of the glass; (ii) a
(4) Designing a 'bar-shaped' laser processing path (figure 3, e) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the processing is finished;
(6) taking off the glass, preheating the glass at 220 ℃, and putting the preheated glass into molten KNO3In the molten salt, the temperature is kept for 3 hours at 420 ℃, so that a stress layer and an ion exchange layer are generated on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 5 performance parameters of foldable glass prepared in example 5
Example 6:
a method for manufacturing foldable glass by laser direct-writing micro-nano structures is shown in figure 1, and is a schematic diagram of a process for processing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting lithium-aluminum-silicon glass to be processed, wherein the composition of the lithium-aluminum-silicon glass is 68 percent SiO2、10％Al2O3、10％Li2O、1％Na2O、5％ZrO2、3％P2O5、2％Sb2O3、0.5％CaO、0.1％K2O, 0.2 percent of MgO and 0.2 percent of ZnO, the size is 300mm multiplied by 500mm, the thickness is 1mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) the visible laser wavelength of the processed glass is 480nm, continuous laser is obtained, the output power is 5W, and an objective lens and an ocular lens are adjusted to focus the laser on the initial position of the bottom of the glass;
(4) designing a rectangular laser processing path (figure 3, a) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the process is finished;
(6) taking the glass down, preheating the glass at 300 ℃, and placing the glass in a temperature range of 40: 60NaNO3-KNO3In the mixed molten salt, keeping the temperature at 400 ℃ for 2 hours to generate a stress layer and an ion exchange layer on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 6 main performance parameters of foldable glass prepared in example 6
Example 7
A method for manufacturing foldable glass by laser direct writing micro-nano structure is shown in figure 1, and is a schematic diagram of a process for manufacturing foldable glass by laser micro-nano, and the method is prepared according to the following steps:
(1) selecting phosphate glass to be processed, wherein the phosphate glass has the composition of 71% SiO2、8％Al2O3、8％Li2O、6％P2O5、2％Sb2O3、1.8％Na2O、1.2％TiO2、1％ZrO2、0.5％CaO、0.5％K2O, the size is 250mm multiplied by 300mm, the thickness is 0.05mm, and the glass is completely cleaned;
(2) placing glass on a three-dimensional sample table;
(3) processing glass near-infrared laser with wavelength of 800nm, adjusting laser pulse width of 100fs and pulse power of 5 muJ, adjusting objective lens and ocular lens to focus laser on the initial position of the bottom of the glass;
(4) designing a triangular laser processing path (figure 3, c) and time in a control computer, and positioning the initial and end positions of laser processing;
(5) opening a laser baffle to focus laser on the glass, and automatically processing the glass according to set parameters until the process is finished;
(6) taking the glass down, preheating the glass at 300 ℃, and placing the glass in a 30: 70NaNO3-KNO3In the mixed molten salt, keeping the temperature at 400 ℃ for 4 hours to generate a stress layer and an ion exchange layer on the surface of the glass and at the laser processing interface;
(7) and taking the glass out of the molten salt, slowly cooling and cleaning to obtain the foldable glass.
Table 7 main performance parameters of foldable glass prepared in example 7
FIG. 2 is a schematic diagram of the large folding radius (outward folding and inward folding) (a) and the small folding radius (inward folding) (b) of the foldable glass processed by the method of the present invention; the inward folding is that the micro-nano structure is positioned on the inner side of the folded glass, and the outward folding is that the micro-nano structure is positioned on the outer side of the folded glass;
as shown in fig. 4, a schematic diagram of size definition in the micro-nano structure is shown;
the foldable glass prepared by the invention can be used in various foldable electronic devices such as televisions, displays, mobile phones and intelligent wearable devices, and is a schematic diagram of a foldable display device made of the foldable glass processed by laser micro-nano technology as shown in figure 5.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A method for manufacturing foldable glass by using a laser direct-writing micro-nano structure is characterized by comprising the following steps:
(1) selecting and cleaning glass to be processed;
(2) performing laser etching on the position to be processed of the glass according to a preset processing path by adopting laser to form a micro-nano structure;
(3) preheating the glass processed by laser, putting the glass into molten salt which is molten and contains potassium ions, and preserving heat at a certain temperature to generate a stress layer and an ion exchange layer on the surface of the glass and at a laser processing interface;
(4) and taking the glass out of the molten salt, cooling and cleaning to obtain the foldable glass.
2. The method for manufacturing foldable glass by using the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (1), the glass to be processed is any one of silicate glass, soda-lime-silica glass, lithium-aluminum-silica glass, borosilicate glass, soda-borosilicate glass, germanate glass, tellurate glass, phosphate glass and borate glass.
3. The method for manufacturing foldable glass by using the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (1), the thickness of the glass to be processed is less than or equal to 2 mm.
4. The method for manufacturing foldable glass by using the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (2), the adopted laser is continuous laser or pulse laser, the wavelength is 172-4400nm, the pulse width of the pulse laser is any one of microsecond level, nanosecond level, picosecond level and femtosecond level, the single pulse energy of the pulse laser is 1nJ-100mJ, and the power of the continuous laser is 0.1 mW-1000W.
5. The method for manufacturing the foldable glass by the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (2), the width of a crack generated by laser etching in the micro-nano structure is 10nm-10 μm; the width of the laser processing area is 1 μm-5 mm.
6. The method for manufacturing foldable glass by using the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (2), in the processing process, the relative movement speed of the laser and the glass to be processed is 0.5 mu m/s-5mm/s, and the action time of the laser and the glass to be processed on a single point is 100ns-2 s.
7. The method for manufacturing foldable glass by using the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (2), the shape of the micro-nano structure is at least one of a rectangle, a circle, a triangle, a buckle, a strip and an irregular shape.
8. The method for manufacturing foldable glass by using the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (3)The molten salt containing potassium ions is KNO3Molten salt, NaNO3/KNO3Mixed molten salts of LiNO3/KNO3Mixed molten salts, RbNO3/KNO3Mixed molten salts, CsNO3/KNO3Any one of the mixed molten salts has the preheating temperature of 200-300 ℃, the heat preservation temperature of 380-500 ℃ and the heat preservation time of 30 minutes-10 hours.
9. The method for manufacturing the foldable glass by the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (4), the foldable glass can rotate forwards or reversely at will at any angle in a range of 0-180 degrees by taking the micro-nano structure as a folding rotating shaft, and can hover at any angle, and the bending radius of the folded part is 0.1-10 mm.
10. The method for manufacturing the foldable glass by the laser direct-writing micro-nano structure according to claim 1, wherein the method comprises the following steps: in the step (4), the transmittance of the prepared foldable glass micro-nano structure area in a visible light wave band is 40% -95%, and the transmittance of the glass at a non-processing position in the visible light wave band can be 60% -95%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107241904A (en) * | 2013-12-17 | 2017-10-10 | 康宁股份有限公司 | The 3D shapings of glass |
| CN109523923A (en) * | 2018-12-20 | 2019-03-26 | 武汉华星光电半导体显示技术有限公司 | Bent cover board and flexible display apparatus |
| US20210107829A1 (en) * | 2019-10-14 | 2021-04-15 | Corning Incorporated | Methods of making a foldable apparatus |
| CN114380510A (en) * | 2021-12-24 | 2022-04-22 | 凯盛科技股份有限公司 | Preparation process of foldable flexible glass |
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2022
- 2022-05-25 CN CN202210578974.2A patent/CN114772940A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107241904A (en) * | 2013-12-17 | 2017-10-10 | 康宁股份有限公司 | The 3D shapings of glass |
| CN109523923A (en) * | 2018-12-20 | 2019-03-26 | 武汉华星光电半导体显示技术有限公司 | Bent cover board and flexible display apparatus |
| US20210107829A1 (en) * | 2019-10-14 | 2021-04-15 | Corning Incorporated | Methods of making a foldable apparatus |
| CN114380510A (en) * | 2021-12-24 | 2022-04-22 | 凯盛科技股份有限公司 | Preparation process of foldable flexible glass |
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