CN117858598A - Display backboard and manufacturing method thereof - Google Patents
Display backboard and manufacturing method thereof Download PDFInfo
- Publication number
- CN117858598A CN117858598A CN202211193444.2A CN202211193444A CN117858598A CN 117858598 A CN117858598 A CN 117858598A CN 202211193444 A CN202211193444 A CN 202211193444A CN 117858598 A CN117858598 A CN 117858598A
- Authority
- CN
- China
- Prior art keywords
- glue
- layer
- glass substrate
- area
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 108
- 239000011521 glass Substances 0.000 claims abstract description 74
- 239000003292 glue Substances 0.000 claims abstract description 53
- 239000000853 adhesive Substances 0.000 claims abstract description 43
- 230000001070 adhesive effect Effects 0.000 claims abstract description 43
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000004806 packaging method and process Methods 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 43
- 239000012790 adhesive layer Substances 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 34
- 239000000463 material Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
The invention provides a display backboard and a manufacturing method thereof. The method for manufacturing the display backboard comprises the following steps: providing a glass substrate; sequentially forming a flexible substrate, a driving circuit board layer, a light emitting device and a packaging layer on the glass substrate; forming a protective film on the surface of the packaging layer far away from the flexible substrate, wherein the protective film comprises a glue layer, at least part of the glue layer is a first glue area, and the adhesive stress of the first glue area is more than or equal to 15gf/25mm; thinning or peeling the glass substrate; and removing the protective film to obtain the display backboard. Therefore, the first adhesive area has larger adhesive force, and in the process of thinning or stripping the glass substrate, the falling-off between the adhesive layer and the packaging layer can be avoided, and the packaging effect of the packaging layer is influenced; and the utilization rate of the glass substrate can be improved, and the manufacturing efficiency of the display backboard can be improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display backboard and a manufacturing method thereof.
Background
Flexible OLEDs typically make a flexible PI (polyimide) substrate on a glass substrate, then a TFT drive circuit on the flexible PI substrate; then evaporating EL luminescent material on the TFT driving circuit; packaging the luminescent material by using TFE (thin film encapsulation) after evaporation is finished; and then thinning or glass the glass substrate according to the size of the display back plate. However, there are still some problems in the current process of thinning or glass the glass substrate, resulting in lower efficiency or affecting the working performance of the display back plate.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a method for manufacturing a display back plate, which can effectively thin or glass a glass substrate, and improve the production efficiency and the glass utilization rate.
In one aspect of the invention, a method of making a display back panel is provided. According to an embodiment of the present invention, a method of manufacturing a display back panel includes: providing a glass substrate; sequentially forming a flexible substrate, a driving circuit board layer, a light emitting device and a packaging layer on the glass substrate; forming a protective film on the surface of the packaging layer far away from the flexible substrate, wherein the protective film comprises a glue layer, at least part of the glue layer is a first glue area, and the adhesive stress of the first glue area is more than or equal to 15gf/25mm; thinning or peeling the glass substrate; and removing the protective film to obtain the display backboard. Therefore, the first adhesive area has larger adhesive force, and in the process of thinning or stripping the glass substrate, the falling-off between the adhesive layer and the packaging layer can be avoided, and the packaging effect of the packaging layer is influenced; and the utilization rate of the glass substrate can be improved, and the manufacturing efficiency of the display backboard can be improved.
According to the embodiment of the invention, the adhesive stress of the first adhesive area is more than or equal to 20gf/25mm.
According to an embodiment of the invention, the first glue area is a UV-reduced-viscosity, sub-sensitive glue.
According to an embodiment of the present invention, the glass substrate is thinned, and the thinning method includes: and (5) corroding by adopting acid liquor.
According to an embodiment of the invention, the first glue area comprises the whole glue layer.
According to the embodiment of the invention, the protective film further comprises a substrate and an acid-resistant coating, wherein the adhesive layer and the acid-resistant coating are arranged on two opposite surfaces of the substrate, the adhesive layer is attached to the packaging layer, and the acid-resistant coating is arranged on the surface of the substrate away from the rigid substrate.
According to an embodiment of the invention, the acid-resistant coating is polytetrafluoroethylene acid-resistant coating.
According to the embodiment of the invention, the glass substrate is peeled off, the adhesive layer further comprises a second adhesive area, the first adhesive area is a peripheral area of the adhesive layer and is arranged around the second adhesive area, and the first adhesive area is directly contacted with the glass substrate, wherein the adhesive stress of the first adhesive layer is larger than that of the second adhesive area.
According to an embodiment of the invention, the orthographic projection of the second glue area on the rigid substrate overlaps with the orthographic projection of the flexible substrate on the glass substrate.
According to the embodiment of the invention, the adhesion force of the first adhesive area is larger than or equal to the sum of the self weight of the adhesive layer and the self weight of the display backboard.
In another aspect of the invention, a display back panel is provided. According to an embodiment of the present invention, the display back plate is manufactured by the method described above. Therefore, the display backboard has higher production efficiency. Those skilled in the art will appreciate that the display back panel has all of the features and advantages of the fabrication of the display back panel described above and will not be described in further detail herein.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a structure for fabricating a display back plate according to an embodiment of the present invention;
FIG. 2 is a flow chart of a structure for fabricating a display back plate according to another embodiment of the present invention;
FIG. 3 is a schematic view of the structure of a protective film according to yet another embodiment of the present invention;
FIG. 4 is a flow chart of a structure for fabricating a display back plate according to another embodiment of the present invention;
FIG. 5 is a schematic plan view showing the structure between the back plate and the adhesive layer according to another embodiment of the present invention;
FIG. 6 is a schematic plan view showing the structure between the back plate and the adhesive layer according to another embodiment of the present invention;
FIG. 7 is a flow chart of a structure for fabricating a display back plate according to another embodiment of the present invention.
Detailed Description
The scheme of the present invention will be explained below with reference to examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the present invention and should not be construed as limiting the scope of the invention. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not limiting in any way.
In one aspect of the invention, a method of making a display back panel is provided. Referring to fig. 1, according to an embodiment of the present invention, a method of manufacturing a display back plate includes: providing a glass substrate 100; sequentially forming a flexible substrate 200, a driving circuit board layer 300, a light emitting device 400, and a package layer 500 on the glass substrate 100; forming a protective film 600 on the surface of the packaging layer 500 away from the flexible substrate 200, wherein the protective film 600 comprises a glue layer 610, at least part of the glue layer 610 is a first glue area 611, and the adhesive stress of the first glue area 611 is more than or equal to 15gf/25mm; thinning or peeling the glass substrate; the protective film 600 is removed to obtain a display back plate. In the prior art, the adhesive layer is common hyposensitive adhesive (PSA) with smaller viscosity, and the first adhesive area with larger adhesive force is arranged in the invention, so that the falling (peeling) between the adhesive layer and the packaging layer can be avoided in the process of thinning or stripping the glass substrate, and the packaging effect of the packaging layer is influenced; and because the viscosity of the first glue area is larger, the same cohesive force is applied to the area where the protective film is directly contacted with the glass substrate, so that the contact area between the glue layer and the glass substrate can be reduced, and the saved glass space can be used for setting more display back plates, so that the utilization rate of the glass substrate can be improved, and the manufacturing efficiency of the display back plates is improved.
According to an embodiment of the present invention, a plurality of driving circuit board layers, light emitting devices, light emitting layers, etc. are typically fabricated on a glass substrate, that is, a plurality of display back plates are fabricated on the same large glass substrate, and then a plurality of display back plates are obtained simultaneously by dicing, referring to fig. 2, that is, a method for fabricating a display back plate further includes: before the protective film 600 is removed, the product of thinning or peeling the glass substrate is cut, and a plurality of display back plates are obtained after the protective film is peeled off.
As shown in fig. 1, the Protective Film (TPF) 600 includes, in addition to the above-mentioned adhesive layer 610, a substrate 620, where the substrate 620 is disposed on a surface of the adhesive layer 610 away from the flexible substrate 200, and in some embodiments, the substrate 620 may be a PET substrate.
According to the embodiment of the invention, the adhesive stress of the first adhesive area is more than or equal to 20gf/25mm, such as 20gf/25mm, 22 gf/25mm, 24gf/25mm, 25gf/25mm, 26gf/25mm, 27gf/25mm, 29gf/25mm, 30gf/25mm and the like. Therefore, falling-off between the protective film and the packaging layer can be better avoided, so that falling-off of certain film layers in the display backboard is caused, and packaging of the packaging layer is invalid; when the first rubber region is positioned in the peripheral area of the rubber layer, the protective film is prevented from being separated from the glass substrate before glass or thinning is completed, and the display backboard is prevented from falling off.
According to an embodiment of the invention, the first adhesive region is a UV-tack-reducing sub-sensitive adhesive (PSA). Therefore, before the protective film is removed, the first adhesive area has larger viscosity, when the protective film layer is required to be removed, the first adhesive area of the adhesive layer is smaller in viscosity by irradiating UV light, the protective film can be removed, and the packaging layer cannot be torn.
According to an embodiment of the present invention, the following is a specific description according to a specific process of thinning or peeling a glass substrate:
in some embodiments of the present invention, a method of thinning a glass substrate includes: and (5) corroding by adopting acid liquor. The glass substrate 110 with a thinner thickness is obtained by partially corroding the glass substrate with acid liquor, and the thinned glass substrate and the flexible substrate are used as a Hybrid substrate, and the Hybrid substrate has certain rigidity, can be suitable for manufacturing large-size display panels, and provides certain mechanical strength for the large-size display panels.
Further, when the glass substrate is thinned, the first glue area comprises the whole glue layer, namely the whole glue layer is the first glue area with high viscosity. Therefore, the protective film can keep good high adhesion in the carrying, thinning or cutting process of the large substrate before thinning, so that the structures such as the light-emitting device and the packaging layer are well protected, the problem that the protective film falls off is solved, and the structures such as the packaging layer are not damaged when the protective film is removed later.
Still further, referring to fig. 3, the protective film 600 further includes a substrate 620 and an acid-resistant coating 630, and the adhesive layer 610 and the acid-resistant coating 630 are disposed on two opposite surfaces of the substrate 620, wherein the adhesive layer is disposed in contact with the encapsulation layer, and the acid-resistant coating 630 is disposed on a surface of the substrate 620 remote from the rigid substrate 100. In the prior art, the protective film only comprises a substrate and a PSA adhesive, and an acid-resistant film layer is usually attached to the surface of the protective film independently when the glass substrate is thinned, so that the display backboard is protected from acid liquor, but the glass substrate thinned by glass is broken easily when the subsequent acid-resistant film layer is torn off. In the invention, the acid-resistant coating is arranged in the protective film, so that the acid-resistant film layer does not need to be attached independently, and the acid-resistant coating is removed at the same time when the protective film is torn off later, thereby protecting the glass substrate.
Wherein the acid-resistant coating is polytetrafluoroethylene acid-resistant coating. Therefore, the corrosion resistance to acid liquor is better, the material sources are wide, and the manufacturing cost is lower.
In other embodiments of the present invention, the glass substrate is peeled off to make a flexible display back plate. In some embodiments, referring to fig. 4, a method of making a display backplate may include: after the protective film 600 is formed on the surface of the encapsulation layer 500 away from the flexible substrate 200, the product is turned over by 180 ° so that the glass substrate 100 is disposed with the protective film facing upward; then, the glass substrate 100 is peeled off; the protective film 600 is removed. For the flexible display panel with glass substrate glass, in the above process, the adhesion of the adhesive layer area directly above the flexible substrate is relatively not too high to prevent the package layer from being damaged when the protective film is torn off, and therefore, in the embodiment of the present invention, referring to fig. 5 and 6 (fig. 6 is a cross-sectional view along AA' in fig. 5), the adhesive layer 610 further includes a second adhesive area 612, the first adhesive area 611 is a peripheral area of the adhesive layer and is disposed around the second adhesive area 612, and the first adhesive area 611 is disposed in direct contact with the glass substrate 100, where the adhesion stress of the first adhesive area 611 is greater than that of the second adhesive area 612. Further, the orthographic projection of the second glue area 612 on the rigid substrate 100 overlaps the orthographic projection of the flexible substrate 200 on the glass substrate 100. Therefore, the first glue area directly contacted with the glass substrate 100 has larger viscosity, and the glass substrate and the first glue area can be effectively prevented from falling off before the flexible substrate and the glass substrate are completely separated, so that falling off of sheets is prevented; in addition, the first rubber area is positioned in the peripheral area of the glass substrate, and the display backboard is not arranged in the peripheral area, so that UV light is adopted to irradiate when the glass substrate is subsequently subjected to glass, and when the viscosity of the UV-reducing hyposensitive adhesive is reduced, the UV light cannot irradiate the light-emitting device, and further the electrical property and the light-emitting efficiency of the light-emitting device cannot be affected by the UV light; in addition, because the first glue area has larger viscosity, the second glue area with larger area is not needed, the area of the second glue area can be reduced, more display back plates 543 can be arranged on the glass substrate, namely, the number of the display back plates 543 arranged on one glass substrate is increased, and the utilization rate of the glass substrate is further increased.
In some embodiments, the adhesion of the first glue area 611 is greater than or equal to the sum of the weight of the glue layer 610 and the weight of the display back plate. Therefore, the glass substrate and the first glue area can be more effectively prevented from falling off before the flexible substrate and the glass substrate are completely separated, and further the falling-off of the sheet is prevented. For example, the adhesive stress of the first adhesive area is more than or equal to 20gf/25mm.
In addition, in the scheme of glass substrate, the adhesive layer of the first adhesive region may not be UV-reduced adhesion and hyposensitive adhesive, but a high-viscosity material with unchanged viscosity, and when the glass substrate is separated from the flexible substrate, referring to fig. 7, the glass substrate 100 may be separated from the flexible substrate 200 by increasing the force of inserting the slotting tool 700.
In another aspect of the invention, a display back panel is provided. According to an embodiment of the present invention, the display back plate is manufactured by the method described above. Therefore, the display backboard has higher production efficiency. Those skilled in the art will appreciate that the display back panel has all of the features and advantages of the fabrication of the display back panel described above and will not be described in further detail herein.
In yet another aspect of the present invention, a display device is provided, which includes the display back plate described above. The specific type of the display device is not particularly required, and a person skilled in the art can flexibly select the display device according to actual requirements, for example, the display device can be any display device with a display function, such as a mobile phone, a notebook, a television, an iPad, a kinedle, a game machine and the like.
It will be understood by those skilled in the art that the display device may further comprise necessary structures and components of the display device, such as a mobile phone, in addition to the aforementioned display back panel, the display device may further comprise necessary structures and components of a mobile phone, such as a glass cover plate, a touch panel, a fingerprint film group, an audio module, a camera module, a CPU, a battery, and a housing.
The terms "first," "second," and the like herein 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, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (11)
1. A method of making a display back panel, comprising:
providing a glass substrate;
sequentially forming a flexible substrate, a driving circuit board layer, a light emitting device and a packaging layer on the glass substrate;
forming a protective film on the surface of the packaging layer far away from the flexible substrate, wherein the protective film comprises a glue layer, at least part of the glue layer is a first glue area, and the adhesive stress of the first glue area is more than or equal to 15gf/25mm;
thinning or peeling the glass substrate;
and removing the protective film to obtain the display backboard.
2. The method of claim 1, wherein the adhesive stress of the first adhesive region is greater than or equal to 20gf/25mm.
3. The method of claim 1, wherein the first glue area is a UV-tack hyposensitive glue.
4. A method according to any one of claims 1 to 3, wherein the glass substrate is thinned, the thinning method comprising: and (5) corroding by adopting acid liquor.
5. The method of claim 4, wherein the first glue area comprises the entire glue layer.
6. The method of claim 4, wherein the protective film further comprises a substrate and an acid-resistant coating, the glue layer and the acid-resistant coating being disposed on opposite surfaces of the substrate, wherein the glue layer is disposed in conforming relation to the encapsulation layer, the acid-resistant coating being disposed on a surface of the substrate remote from the rigid substrate.
7. The method of claim 4, wherein the acid resistant coating is a polytetrafluoroethylene acid resistant coating.
8. A method according to any one of claims 1 to 3, wherein the glass substrate is peeled off, the glue layer further comprises a second glue area, the first glue area is a peripheral area of the glue layer and is arranged around the second glue area, the first glue area is arranged in direct contact with the glass substrate, and the adhesive stress of the first glue area is larger than the adhesive stress of the second glue area.
9. The method of claim 8, wherein the orthographic projection of the second glue area on the rigid substrate overlaps the orthographic projection of the flexible substrate on the glass substrate.
10. The method of claim 8, wherein the adhesive force of the first glue area is greater than or equal to the sum of the weight of the glue layer and the weight of the display back plate.
11. A display back sheet produced by the method of any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211193444.2A CN117858598A (en) | 2022-09-28 | 2022-09-28 | Display backboard and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211193444.2A CN117858598A (en) | 2022-09-28 | 2022-09-28 | Display backboard and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117858598A true CN117858598A (en) | 2024-04-09 |
Family
ID=90535082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211193444.2A Pending CN117858598A (en) | 2022-09-28 | 2022-09-28 | Display backboard and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117858598A (en) |
-
2022
- 2022-09-28 CN CN202211193444.2A patent/CN117858598A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107819072B (en) | Supporting film, organic light emitting display device and method of manufacturing the same | |
| JP5345303B2 (en) | Display device and manufacturing method thereof | |
| CN104205041B (en) | The manufacturing method of flexible display substrates and technique film for manufacturing flexible display substrates | |
| CN109817684A (en) | Flexible OLED mould group stacked structure and preparation method thereof | |
| WO2012104989A1 (en) | Thin plate glass substrate bonded body and method for producing same | |
| US8236126B2 (en) | Encapsulation method of environmentally sensitive electronic element | |
| CN109873020B (en) | Laminated film material, display panel, display device and preparation method of display panel | |
| JP2019102770A (en) | Method of manufacturing laminate for flexible device | |
| JP5407649B2 (en) | ELECTRO-OPTICAL DEVICE, ITS MANUFACTURING METHOD, AND ELECTRONIC DEVICE | |
| US11289675B2 (en) | Display panel with support structure and method of manufacturing the same | |
| KR102526047B1 (en) | Glass laminate and method for producing same | |
| WO2020056862A1 (en) | Protective film of oled packaging structure, oled packaging structure, and fabricating method for protective film | |
| CN104465528B (en) | The preparation method and flexible base board precast segment of flexible base board | |
| CN109166890A (en) | Flexible display panels and preparation method thereof and flexible display apparatus | |
| CN111180600B (en) | Organic light emitting diode device structure and manufacturing method thereof | |
| CN117858598A (en) | Display backboard and manufacturing method thereof | |
| TW201715360A (en) | Flexible touch panel and manufacturing method thereof and touch display panel | |
| TWI393494B (en) | Substrate strip with wiring and method for fabricating the same | |
| CN111315131A (en) | Circuit board and manufacturing method thereof | |
| CN112562524B (en) | Display panel and display panel manufacturing method | |
| CN210271563U (en) | Display panel and display device | |
| CN210156378U (en) | Display mother board and display panel | |
| KR20110116776A (en) | Method of fabricating flexible display | |
| KR101370604B1 (en) | Method of manufacturing display panel and partial masking tape for display panel | |
| CN110534647A (en) | Flexible substrate, display base plate and display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |