CN113045208A - Ultrathin glass layer, preparation method thereof and cover plate - Google Patents
Ultrathin glass layer, preparation method thereof and cover plate Download PDFInfo
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- CN113045208A CN113045208A CN202110225809.4A CN202110225809A CN113045208A CN 113045208 A CN113045208 A CN 113045208A CN 202110225809 A CN202110225809 A CN 202110225809A CN 113045208 A CN113045208 A CN 113045208A
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- 239000011521 glass Substances 0.000 title claims abstract description 158
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000005498 polishing Methods 0.000 claims abstract description 27
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 155
- 230000003287 optical effect Effects 0.000 claims description 28
- 239000012790 adhesive layer Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 239000011241 protective layer Substances 0.000 claims description 11
- 238000002834 transmittance Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000003426 chemical strengthening reaction Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 5
- 238000007517 polishing process Methods 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000005354 aluminosilicate glass Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 150000007522 mineralic acids Chemical class 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000005530 etching Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 3
- 229940104869 fluorosilicate Drugs 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
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- 238000011084 recovery Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
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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
-
- 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
- C03C15/02—Surface treatment of glass, not in the form of fibres or filaments, by etching for making a smooth surface
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
-
- 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
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
-
- 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
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/365—Coating different sides of a glass substrate
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention discloses an ultrathin glass layer, a preparation method thereof and a cover plate, wherein the preparation method of the ultrathin glass layer comprises the following steps: spraying a frosting solution on at least one side surface of the ultrathin glass layer to form a surface concave-convex structure; cleaning the surface of the ultrathin glass layer by adopting hydrofluoric acid; and carrying out chemical polishing treatment on the surface of the ultrathin glass layer. Compared with the existing ultrathin glass layer, the preparation method thereof and the cover plate, the invention has the advantages that the surface concave-convex structure is arranged on at least one side surface of the ultrathin glass layer, so that the contact area between the ultrathin glass layer and the adjacent film layer is increased, the bending performance of the cover plate is improved, and the film layer in the cover plate is prevented from being layered; simultaneously, concave-convex structure helps reducing ambient light interference, increases the diffuse reflection, promotes display device's outdoor demonstration performance.
Description
Technical Field
The invention relates to the technical field of display, in particular to an ultrathin glass layer, a preparation method thereof and a cover plate.
Background
With the development of science and technology, flexible display devices show more and more extensive application prospects. The main advantage lies in its wraparound nature, can realize the diversification of product, reaches outstanding display effect and outward appearance effect. Currently, mobile phone terminals and display screen manufacturers are actively laying out and developing technologies.
For a bendable display device, it is an extremely important subject that the original glass cover plate cannot be used and what material is used to protect the display screen on the surface. It needs to have the following main characteristics: the surface hardness is high, the scratch is not easy, the bending is easy, the restorability is good, the light transmittance is high, and the smoothness is high.
The development of materials for the protective Cover sheet (CW) of flexible display devices is still in an early stage, and the main flow directions are the following two: 1. a flexible substrate material represented by a transparent Polyimide Film (CPI) is subjected to surface Hardening (HC) treatment on the surface thereof to increase the surface hardness. It has good bending properties, but does not perform well in terms of bending recovery, product life, and surface strength in a modular structure. 2. And a cover plate using Ultra Thin Glass (UTG) as a base material. The ultrathin glass also has the flexibility, and the glass has higher hardness after being strengthened. Compared with the CPI base material, the CPI base material has the characteristics of better bending recovery, high surface hardness, high permeability, bending resistance and the like, and is more and more emphasized by the terminal. However, in the whole module structure in the prior art, the modulus of the ultrathin glass layer is the largest, the ultrathin glass layer is not positioned in the neutral layer, and the stress between the ultrathin glass layer and the adjacent layer is large. When the whole body is bent, the ultra-thin glass layer is easily layered with the optical cement of the upper layer or the lower layer, resulting in abnormal appearance and abnormal display.
In summary, the bending area of the flexible display device in the prior art is prone to generate the technical problems of bright lines, dark lines, and the like.
Disclosure of Invention
The embodiment of the invention provides an ultrathin glass layer, a preparation method thereof and a cover plate, which are used for solving the technical problems that bright lines, dark lines and the like are easy to generate in a bending area of a flexible display device.
In order to solve the above problems, the present invention provides, in a first aspect, a method for producing an ultra-thin glass layer, comprising the steps of:
spraying a frosting solution on at least one side surface of the ultrathin glass layer to form a surface concave-convex structure;
cleaning the surface of the ultrathin glass layer by adopting hydrofluoric acid;
and carrying out chemical polishing treatment on the surface of the ultrathin glass layer.
In some embodiments of the present invention, the composition materials of the frosting solution comprise fluoride, organic matter and insoluble inorganic matter, and the pH of the frosting solution is in the range of 2-4.
In some embodiments of the present invention, the step of chemically polishing the surface of the ultra-thin glass layer comprises: and preparing polishing liquid, and immersing the ultrathin glass layer in the polishing liquid for soaking.
In some embodiments of the present invention, the constituent materials of the polishing solution include hydrofluoric acid, inorganic acid, and organic substance.
In some embodiments of the present invention, before the step of spraying the frosting solution on the ultra-thin glass layer or after the step of performing a chemical polishing treatment on the ultra-thin glass layer, the method further comprises: and carrying out edge cutting, processing and chemical strengthening treatment on the ultrathin glass layer.
In some embodiments of the present invention, the step of spraying a frosting solution on the ultra-thin glass layer comprises: and coating an acid-resistant protective layer on the non-frosted etched surface of the ultrathin glass layer, wherein the material of the acid-resistant protective layer comprises polyester resin or acrylic acid.
In a second aspect, the present invention provides an ultrathin glass layer, which is prepared by the preparation method according to any one of the embodiments of the first aspect, and at least one side surface of the ultrathin glass layer is provided with a surface concave-convex structure.
In some embodiments of the present invention, the material of the ultra-thin glass layer comprises aluminosilicate glass, and the thickness of the ultra-thin glass layer is 30um to 50 um.
In some embodiments of the present invention, the ultra-thin glass layer has a light transmittance of greater than 85%, a haze of less than 6%, and a roughness of less than 0.5 um.
In a third aspect, the present invention provides a cover plate comprising: a surface protective layer, a first optical cement layer, a second optical cement layer and an ultra-thin glass layer as described in any of the embodiments of the second aspect; the ultrathin glass layer is arranged on one side of the first optical adhesive layer, the second optical adhesive layer is arranged on one side, away from the first optical adhesive layer, of the ultrathin glass layer, and the surface protection layer is arranged on one side, away from the ultrathin glass layer, of the second optical adhesive layer.
Compared with the existing ultrathin glass layer, the preparation method thereof and the cover plate, the invention has the advantages that the surface concave-convex structure is arranged on at least one side surface of the ultrathin glass layer, so that the contact area between the ultrathin glass layer and the adjacent film layer is increased, the bending performance of the cover plate is improved, and the film layer in the cover plate is prevented from being layered; simultaneously, concave-convex structure helps reducing ambient light interference, increases the diffuse reflection, promotes display device's outdoor demonstration performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a preparation method according to an embodiment of the present invention;
FIGS. 2A-2C are schematic step-by-step illustrations of a manufacturing process according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the structure of an ultra-thin glass layer in one embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cover plate according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Based on the above, the embodiment of the invention provides an ultrathin glass layer, a preparation method thereof and a cover plate. The following are detailed below.
First, the embodiment of the invention provides a preparation method of an ultrathin glass layer. As shown in fig. 1 and fig. 2A to 2C, fig. 1 is a schematic flow chart of a production method in one embodiment of the present invention, and fig. 2A to 2C are schematic stepwise views of the production method in one embodiment of the present invention. The preparation method of the ultrathin glass layer comprises the following steps:
s1, spraying a frosting liquid on at least one side surface of the ultrathin glass layer 101 to form a surface concave-convex structure;
s2, cleaning the surface of the ultrathin glass layer 101 by using hydrofluoric acid;
and S3, performing chemical polishing treatment on the surface of the ultrathin glass layer 101.
Compared with the preparation method of the ultrathin glass layer in the prior art, the preparation method of the ultrathin glass layer has the advantages that the surface concave-convex structure is arranged on at least one side surface of the ultrathin glass layer 101, so that the contact area between the ultrathin glass layer 101 and an adjacent film layer is increased, the bending performance of the cover plate 10 is improved, and the inner film layer of the cover plate 10 is prevented from being layered; simultaneously, concave-convex structure helps reducing ambient light interference, increases the diffuse reflection, promotes display device's outdoor demonstration performance.
In the embodiment of the present invention, the step S1 of spraying a frosting solution on at least one side surface of the ultra-thin glass layer 101 includes: providing an ultra-thin glass layer 101, wherein the surface of the ultra-thin glass layer 101 is flat, as shown in fig. 2A; placing the ultrathin glass layer 101 into a frosting pool, spraying a frosting solution on one side surface of the ultrathin glass layer 101 for a certain time, removing the residual frosting solution on the surface of the ultrathin glass layer 101 by hydrofluoric acid after the frosting process is finished, cleaning the surface of the ultrathin glass layer 101 by clean water and air flow, and forming a surface concave-convex structure on the surface of the ultrathin glass layer 101, as shown in fig. 2B. Here, frosting only one side surface of the ultra-thin glass layer 101 is exemplified, and in fact in other embodiments, the frosting liquid is sprayed on other surfaces, and this step is repeated to complete the frosting treatment of both side surfaces or more of the ultra-thin glass layer 101.
Preferably, the composition materials of the frosting solution comprise fluoride, organic matters and insoluble inorganic matters, and more preferably, the fluoride in the frosting solution is ammonium bifluoride. The pH value of the frosting liquid is within the range of 2-4. When the frosting solution is sprayed on the ultrathin glass layer 101, fluoride in the frosting solution reacts with silicon dioxide in the ultrathin glass layer 101 to generate insoluble fluorosilicate, and the insoluble fluorosilicate is attached to the surface of the ultrathin glass layer 101 to prevent the frosting solution from eroding to a deeper position of the ultrathin glass layer 101. Because the distribution positions of the insoluble fluorosilicate on the surface of the ultrathin glass layer 101 are not uniform, some areas in the ultrathin glass layer 101 are not eroded, some areas in the ultrathin glass layer 101 are eroded, the eroded areas are also shallow, a concave-convex structure is formed on the surface of the ultrathin glass layer 101, light is reflected diffusely, a fog visual effect is formed, and a frosting process is completed.
The step S1 of spraying the frosting solution on the ultra-thin glass layer 101 includes: and coating an acid-resistant protective layer on the non-frosted etched surface of the ultrathin glass layer 101, wherein the material of the acid-resistant protective layer comprises polyester resin or acrylic acid. The terylene resin or acrylic acid has good chemical stability, and can prevent the frosting liquid from eroding the non-frosting etched surface and damaging the flatness of the non-frosting etched surface.
The step S2 of cleaning the surface of the ultra-thin glass layer 101 with hydrofluoric acid includes: the frosting liquid is remained on the surface of the ultrathin glass layer 101, hydrofluoric acid is sprayed on the ultrathin glass layer 101, the hydrofluoric acid corrodes the whole surface of the ultrathin glass layer 101 due to the strong corrosivity of the hydrofluoric acid, the area where the frosting liquid is remained can be removed together, the surface of the ultrathin glass layer 101 is washed by clean water, and liquid drops on the ultrathin glass layer 101 are scattered by air flow.
At this time, the roughness of the concave-convex structure is relatively large, the haze of the ultra-thin glass layer 101 is high, the light transmittance of the ultra-thin glass layer 101 is poor, and the display effect of the display device formed by the ultra-thin glass layer 101 is poor. The ultra-thin glass layer 101 may be polished for this defect to improve.
The step S3 of performing the chemical polishing process on the surface of the ultra-thin glass layer 101 includes: a polishing liquid is prepared in a polishing tank, the ultra-thin glass layer 101 is immersed in the polishing liquid for immersion, and bubbling treatment is performed on the bottom and the side surfaces of the polishing tank, so that the roughness of the uneven structure becomes small as shown in fig. 2C. Preferably, the polishing solution comprises hydrofluoric acid, inorganic acid and organic matter.
In this embodiment, the polishing solution includes concentrated acid, has an etching effect on the ultra-thin glass layer 101, and immerses the ultra-thin glass layer 101 in the polishing solution for immersion, the concave-convex structure includes convex portions 101a and concave portions 101b, a contact area between the convex portions 101a and the polishing solution is larger than a contact area between the concave portions 101b and the polishing solution, an etching rate of the convex portions 101a is larger than an etching rate of the concave portions 101b, and roughness of the ultra-thin glass layer 101 gradually decreases, so that haze and light transmittance of the ultra-thin glass layer 101 also decrease. Specifically, the bubbling process serves to make the temperature of the polishing liquid uniform throughout, and the bubbles agitating the flow of the polishing liquid also helps to accelerate the dispersion of the reaction products on the surface of the ultra-thin glass layer 101. In other embodiments, the bubbling process may be replaced by a stirring process for the polishing bath.
In the embodiment of the present invention, according to the roughness, the haze and the light transmittance parameters of the ultra-thin glass layer 101 required for actually producing different products, the method can be implemented by adjusting the component contents, the processing time, the temperature, the air pressure and other environmental parameters of the frosting solution and the polishing solution in the frosting process and the chemical polishing process.
Typically, the ultra-thin glass layer 101 is formed by thinning, cutting and strengthening raw glass. Since the thickness of the raw material glass is usually 70um to 500um, the thickness required by the ultra-thin glass layer 101 is achieved only by performing multiple thinning processes on the raw material glass in this embodiment.
Preferably, the method further includes, before the step S1 of spraying the frosting solution on the ultra-thin glass layer 101 or after the step S3 of performing a chemical polishing process on the ultra-thin glass layer 101: the ultra-thin glass layer 101 is subjected to edge cutting, machining, and chemical strengthening. In some embodiments, only one side surface of the ultra-thin glass layer 101 needs to be provided with the concave-convex structure, and the required ultra-thin glass layer 101 can be obtained by etching the raw glass, and then performing edge cutting, thinning processing and chemical strengthening processing on the raw glass; or the raw material glass is subjected to edge cutting, thinning processing and chemical strengthening treatment, and then is etched to obtain the required ultrathin glass layer 101. In other embodiments, the concave-convex structures are prepared on the upper and lower surfaces of the ultra-thin glass layer 101, and then the raw glass is subjected to edge cutting, thinning processing, chemical strengthening treatment and etching, so as to prevent the concave-convex structures formed by etching from being damaged in the thinning process.
In order to better implement the preparation method of the ultrathin glass layer in the embodiment of the invention, the embodiment of the invention also provides the ultrathin glass layer on the basis of the preparation method, and the ultrathin glass layer is prepared by adopting the preparation method in the embodiment.
As shown in fig. 3, fig. 3 is a schematic structural diagram of an ultra-thin glass layer in an embodiment of the present invention. At least one side surface of the ultra-thin glass layer 101 is provided with a surface concave-convex structure. Wherein the concavo-convex structure includes a convex portion 101a and a concave portion 101 b. The height difference and the distance between the convex part 101a and the concave part 101b are related to the component content, the processing time, the temperature, the air pressure and other environmental parameters of the frosting liquid and the polishing liquid in the frosting process and the chemical polishing process, and are specifically determined according to the haze, the roughness and the light transmittance of the ultrathin glass layer required by an actual product. The difference in height between the projections 101a and the recesses 101b is less than 5 μm, and is observed only at a microscopic level.
Preferably, the material of the ultra-thin glass layer 101 includes aluminosilicate glass, and the thickness of the ultra-thin glass layer is 30um to 50 um. The aluminosilicate glass comprises silicon dioxide (SiO2) and alumina (Al2O3), wherein the silicon dioxide can improve the strength and the chemical stability of the glass, and the alumina can improve the chemical stability of the glass and simultaneously can inhibit the phase separation of the phosphorus-containing glass.
In the present embodiment, the ultra-thin glass layer 101 has a light transmittance of greater than 85%, a haze of less than 6%, and a roughness of less than 0.5 um. At this time, the display effect and the interlayer friction of the ultra-thin glass layer 101 are balanced, so that the display effect of the display device is not excessively influenced, and the film layer in the cover plate is prevented from being layered in the bending process.
By using the ultra-thin glass layer 101 as described in the above embodiments, the performance of the cover plate is further improved. As shown in fig. 4, fig. 4 is a schematic structural diagram of a cover plate in an embodiment of the present invention. The cover plate includes: a surface protective layer 104, a first optical cement layer 102, a second optical cement layer 103, and an ultra-thin glass layer 101 as described in the above embodiments; the ultrathin glass layer 101 is arranged on one side of the first optical adhesive layer 102, the second optical adhesive layer 103 is arranged on one side, far away from the first optical adhesive layer 102, of the ultrathin glass layer 101, and the surface protection layer 104 is arranged on one side, far away from the ultrathin glass layer 102, of the second optical adhesive layer 103.
Preferably, a surface concave-convex structure is arranged on the opposite surface of the ultra-thin glass layer 101 and the first optical adhesive layer 102 and/or the opposite surface of the ultra-thin glass layer 101 and the second optical adhesive layer 103. The ultra-thin glass layer 101 comprises at least six faces, wherein the area of the upper surface in contact with the second optical adhesive layer 103 and the area of the lower surface in contact with the first optical adhesive layer 102 are larger, the concave-convex structure is prepared on the upper surface or the lower surface, and the effect of increasing the interlayer friction force is more remarkable.
In some embodiments, the concave-convex structure is prepared by etching only one side of the upper surface or the lower surface of the ultra-thin glass layer 101, so that sufficient friction force can be provided between the concave-convex structure and other film layers to avoid delamination. In other embodiments, the concave-convex structure is formed by etching both the upper surface and the lower surface of the ultra-thin glass layer 101, so that sufficient friction force can be obtained between the concave-convex structure and other film layers.
The first optical adhesive layer 102 and the second optical adhesive layer 103 both comprise adhesives which are colorless and transparent, have light transmittance of more than 90%, have good bonding strength, and can be cured at room temperature or intermediate temperature. Coating a gel adhesive on the surface of the ultrathin glass layer 101, wherein the surface can be a flat surface or a surface comprising a concave-convex structure, adhering other film layers to the surface of the adhesive on the side away from the ultrathin glass layer 101, and curing to form the first optical adhesive layer 102 or the second optical adhesive layer 103. One side of the second optical adhesive layer 103, which is far away from the ultra-thin glass layer 101, is further provided with a surface protective layer 104, and the surface protective layer 104 is subjected to hardening treatment on the surface, so that the mechanical strength of the cover plate is enhanced, and the ultra-thin glass layer 101 is prevented from being damaged by external force.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again. In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and specific implementations of each unit, structure, or operation may refer to the foregoing method embodiments, which are not described herein again.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of making an ultra-thin glass layer, comprising the steps of:
spraying a frosting solution on at least one side surface of the ultrathin glass layer to form a surface concave-convex structure;
cleaning the surface of the ultrathin glass layer by adopting hydrofluoric acid;
and carrying out chemical polishing treatment on the surface of the ultrathin glass layer.
2. The preparation method of claim 1, wherein the composition materials of the frosting solution comprise fluoride, organic substances and insoluble inorganic substances, and the pH value of the frosting solution is in a range of 2-4.
3. A producing method according to claim 1, wherein the step of subjecting the surface of the ultra-thin glass layer to chemical polishing treatment includes: and preparing polishing liquid, and immersing the ultrathin glass layer in the polishing liquid for soaking.
4. The method according to claim 3, wherein the constituent materials of the polishing liquid include hydrofluoric acid, an inorganic acid, and an organic substance.
5. The method of claim 1, wherein the step of spraying a frosting fluid onto the ultra-thin glass layer comprises: and coating an acid-resistant protective layer on the non-frosted etched surface of the ultrathin glass layer, wherein the material of the acid-resistant protective layer comprises polyester resin or acrylic acid.
6. The method for preparing the glass according to claim 1, further comprising, before the step of spraying the frosting solution on the ultra-thin glass layer or after the step of performing a chemical polishing process on the ultra-thin glass layer: and carrying out edge cutting, processing and chemical strengthening treatment on the ultrathin glass layer.
7. An ultra-thin glass layer, characterized in that the ultra-thin glass layer is produced by the production method according to any one of claims 1 to 6.
8. The ultra-thin glass layer as claimed in claim 1, characterized in that the material of the ultra-thin glass layer comprises an aluminosilicate glass, the thickness of the ultra-thin glass layer being between 30um and 50 um.
9. The ultra-thin glass layer as claimed in claim 1, wherein the ultra-thin glass layer has a light transmittance of more than 85%, a haze of less than 6%, and a roughness of less than 0.5 um.
10. A cover plate, comprising: a surface protective layer, a first optical cement layer, a second optical cement layer and an ultra-thin glass layer as claimed in any one of claims 7 to 9; the ultrathin glass layer is arranged on one side of the first optical adhesive layer, the second optical adhesive layer is arranged on one side, away from the first optical adhesive layer, of the ultrathin glass layer, and the surface protection layer is arranged on one side, away from the ultrathin glass layer, of the second optical adhesive layer.
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| CN114967203A (en) * | 2022-05-16 | 2022-08-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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