CN117042566A - Display device, preparation method thereof and auxiliary film - Google Patents
Display device, preparation method thereof and auxiliary film Download PDFInfo
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- CN117042566A CN117042566A CN202210944608.4A CN202210944608A CN117042566A CN 117042566 A CN117042566 A CN 117042566A CN 202210944608 A CN202210944608 A CN 202210944608A CN 117042566 A CN117042566 A CN 117042566A
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 91
- 230000001681 protective effect Effects 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000002788 crimping Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 239000002243 precursor Substances 0.000 claims abstract description 16
- 239000012790 adhesive layer Substances 0.000 claims description 132
- 239000000853 adhesive Substances 0.000 claims description 51
- 230000001070 adhesive effect Effects 0.000 claims description 51
- 239000010410 layer Substances 0.000 claims description 20
- 239000003292 glue Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- -1 polyethylene terephthalate Polymers 0.000 claims description 10
- 239000004642 Polyimide Substances 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 229920001721 polyimide Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003522 acrylic cement Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000000499 gel Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 229920006304 triacetate fiber Polymers 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000010408 film Substances 0.000 description 240
- 230000000052 comparative effect Effects 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 4
- 206010040844 Skin exfoliation Diseases 0.000 description 3
- 239000012788 optical film Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
Classifications
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- 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
-
- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
-
- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
- G09F9/335—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 being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
-
- 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
- G09F9/35—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 being liquid crystals
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present disclosure provides a method for manufacturing a display device, comprising the steps of: providing a display precursor, wherein the display precursor comprises a bearing substrate, a base plate and a display device which are sequentially stacked, and the surface of one side of the display device, which is far away from the base plate, comprises a middle area and a crimping area positioned at the edge of the middle area; covering an auxiliary film on the display device, wherein the auxiliary film comprises a protective film, a first film and a second film, the first film and the second film are arranged on the protective film in the same layer at intervals, the first film contacts the middle area, and the second film contacts the crimping area; separating the carrier substrate from the base plate by a laser lift-off process; and removing the protective film and the second film to expose the crimp region. The display device prepared by the method has higher yield. The disclosure also provides an auxiliary film for preparing a display device and a display device prepared by the preparation method.
Description
Technical Field
The disclosure relates to the technical field of display devices, and in particular relates to a display device, a preparation method thereof and an auxiliary film.
Background
In the production of display devices, it is often necessary to separate the substrate in the device from the carrier substrate by laser lift-off. However, since the material of the substrate is generally flexible, for example, the material of the substrate may be polyimide, the substrate after laser separation is easily expanded due to heating, so that the interval between the outer wire bonding (outer lead bonding, OLB) pads on the substrate compression bonding area is increased, and the overlapping area of the subsequent OLB pads and Chip On Film (COF) pads is reduced or not overlapped, thereby reducing the yield of the display device.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
Accordingly, there is a need for a method of manufacturing a display device that can improve the yield of the display device.
In addition, it is also necessary to provide an auxiliary film for manufacturing a display device.
In addition, it is also necessary to provide a display device manufactured by the above manufacturing method.
At least one embodiment of the present disclosure provides a method for manufacturing a display device, including:
providing a display precursor, wherein the display precursor comprises a bearing substrate, a base plate and a display device which are sequentially stacked, and the surface of one side of the display device, which is far away from the base plate, comprises a middle area and a crimping area positioned at the edge of the middle area;
covering an auxiliary film on the display device, wherein the auxiliary film comprises a protective film, a first film and a second film, the first film and the second film are arranged on the protective film in the same layer at intervals, the first film contacts the middle area, and the second film contacts the crimping area;
separating the carrier substrate from the base plate by a laser lift-off process; and
and removing the protective film and the second film to expose the crimping region.
In some of these embodiments, the auxiliary film further comprises:
a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is arranged on the first film, and the second adhesive layer is arranged on the second film;
wherein when the auxiliary film is covered on the display device, the first adhesive layer contacts the middle region, and the second adhesive layer contacts the crimping region.
In some of these embodiments, the adhesion between the protective film and the first film and the adhesion between the protective film and the second film are both greater than the adhesion between the second glue layer and the display device.
In some of these embodiments, after the separation of the carrier substrate from the substrate by the laser lift-off process, and before the removal of the protective film and the second film, the method further comprises:
and forming a support film on the surface of the substrate away from the auxiliary film.
In some of these embodiments, the adhesive force between the first film and the first adhesive layer, the adhesive force between the first adhesive layer and the display device, and the adhesive force between the substrate and the support film are all greater than the adhesive force between the protective film and the first film.
In some of these embodiments, the adhesion between the protective film and the second film, the adhesion between the second film and the second adhesive layer, and the adhesion between the second adhesive layer and the display device decrease in order.
In some embodiments, the material of the first adhesive layer includes at least one of acrylic adhesive and OCA optical adhesive; and/or
The second adhesive layer is made of at least one of silica gel and polyurethane gel; and/or
The first membrane is made of triacetate fiber or polyvinyl alcohol; and/or
The second film is made of polyethylene terephthalate; and/or
The bearing substrate is made of glass, metal or ceramic; and/or
The substrate is a flexible substrate, and the flexible substrate is made of polyimide, polyethylene, polypropylene or polystyrene.
In some of these embodiments, the auxiliary film further comprises a release film, the release film being located on the first and second glue layers, the method of preparing further comprising, prior to the overlaying the auxiliary film on the display device:
and removing the release film.
In some of these embodiments, the first film and the second film are spaced apart at a location corresponding to the intermediate region; and/or
The first film and the second film are spaced apart by a distance of 0.2mm to 1.5mm.
In some embodiments, the separating the carrier substrate from the substrate by a laser lift-off process specifically includes:
performing laser scanning treatment on an interface between the bearing substrate and the base plate;
the carrier substrate is separated from the base plate by mechanical peeling.
In some of these embodiments, after the removing the protective film and the second film, the method further comprises:
and mounting an electronic device on the crimping area.
At least one embodiment of the present disclosure provides an auxiliary film for preparing a display device, including:
a protective film; and
and the first film and the second film are arranged on the protective film at the same layer and interval.
In some of these embodiments, the auxiliary film further comprises:
a first adhesive layer and a second adhesive layer, the first adhesive layer being disposed on the first film;
a second glue layer disposed on the second film;
and the release film is positioned on the first adhesive layer and the second adhesive layer.
At least one embodiment of the present disclosure provides a display device prepared by the preparation method.
In the process of separating the bearing substrate from the substrate through the laser peeling treatment, the expansion of the crimping area can be reduced due to the supportability of the second film, so that the interval of the OLB bonding pads on the crimping area is kept basically unchanged, the lap joint area of the follow-up OLB bonding pads and the COF bonding pads is kept basically unchanged, and the yield of the display device is improved.
Drawings
Fig. 1 is a flowchart of a preparation of a display device provided by the present disclosure;
FIG. 2 is a cross-sectional view of a display precursor provided by the present disclosure;
FIG. 3 is a cross-sectional view of an auxiliary film provided by the present disclosure;
FIG. 4 is a cross-sectional view of the auxiliary film of FIG. 3 after it has been applied to the display precursor of FIG. 2;
fig. 5 is a cross-sectional view of the carrier substrate and base plate shown in fig. 4 separated;
fig. 6 is a cross-sectional view of the substrate shown in fig. 5 after a support film is formed on the surface thereof;
fig. 7 is a cross-sectional view of the protective film, the second adhesive layer, and the second film shown in fig. 6 after removal.
Reference numerals: 10-displaying the precursor; 11-a carrier substrate; 12-a substrate; 13-a display device; 131-an intermediate zone; 132-crimping zone; 20-an auxiliary film; 30-a protective film; 40-a first film; 401-a first interval; 41-a second film; 50-a first adhesive layer; 501-a second interval; 51-a second glue layer; 60-support membrane.
Detailed Description
In order that the disclosure may be understood, a more complete description of the disclosure will be rendered by reference to the appended drawings. Preferred embodiments of the present disclosure are shown in the drawings. This disclosure may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the disclosure provides a method for manufacturing a display device, including the following steps:
in step S11, referring to fig. 2, a display precursor 10 is provided.
In one embodiment, the display precursor 10 includes a carrier substrate 11, a substrate 12, and a display device 13 stacked in order.
In an embodiment, the carrier substrate 11 may be glass, metal or ceramic. Specifically, the material of the carrier substrate 11 is glass, metal or ceramic. In one embodiment, the substrate 12 may be a flexible substrate. The flexible substrate is made of Polyimide (PI), polyethylene (PE), polypropylene (PP) or Polystyrene (PS). Specifically, the flexible substrate is made of polyimide.
In one embodiment, the display device 13 may be an organic light emitting diode, a quantum dot light emitting diode, a nixie tube, a liquid crystal display, a fluorescent screen, or the like. Wherein, the surface of the display device 13 far from the side of the substrate 12 comprises a middle area 131 and a crimping area 132 positioned at the edge of the middle area 131.
In step S12, referring to fig. 3, an auxiliary film 20 is provided.
In one embodiment, the auxiliary film 20 includes a protective film 30, a first film 40, a second film 41, a first adhesive layer 50, and a second adhesive layer 51.
In one embodiment, the first film 40 is positioned on the protective film 30. In one embodiment, the first film 40 may be a Polarizer (POL) or other optical film. In an embodiment, the material of the first film 40 is triacetate fiber or polyvinyl alcohol. The polaroid can be used for reducing the influence of external parasitic light on a display device which is prepared subsequently, so that the display quality of the display device is improved.
In one embodiment, the second film 41 is also disposed on the protective film 30, and the first film 40 and the second film 41 are disposed in the same layer and spaced apart. I.e. with a first spacing 401 between said first film 40 and said second film 41.
In an embodiment, the length of the first space 401 may be 0.2mm to 1.5mm. In one embodiment, the second film 41 may be a polyethylene terephthalate (PET) film or other film material with good support.
In one embodiment, the first adhesive layer 50 is located on the first film 40, and two opposite sides of the first adhesive layer 50 and two opposite sides of the first film 40 are respectively flush. The first adhesive layer 50 has high adhesion and insulation. In an embodiment, the material of the first adhesive layer 50 includes at least one of acrylic adhesive and OCA (Optically Clear Adhesive) optical adhesive.
In an embodiment, the second adhesive layer 51 is located on the second film 41, and two opposite sides of the second adhesive layer 51 and two opposite sides of the second film 41 are respectively flush. Wherein the first glue layer 50 and the second glue layer 51 are also arranged at the same layer and are separated from each other. I.e. with a second spacing 501 between the first glue layer 50 and the second glue layer 51. In one embodiment, the length of the second interval 501 is equal to the length of the first interval 401. In an embodiment, the position of the second interval 501 corresponds to the position of the first interval 401, and the second interval 501 communicates with the first interval 401. The second adhesive layer 51 has low viscosity and does not remain after being torn off. In an embodiment, the material of the second adhesive layer 51 includes at least one of silica gel or polyurethane gel.
In another embodiment, the auxiliary film 20 further includes a release film (not shown). Wherein the release film is located on the first adhesive layer 50 and the second adhesive layer 51, and the release film can be peeled off on the first adhesive layer 50 and the second adhesive layer 51. Wherein, the adhesion force between the release film and the first adhesive layer 50 and the adhesion force between the release film and the second adhesive layer 51 are smaller than the adhesion force between the protective film 30 and the first film 40, the adhesion force between the protective film 30 and the second film 41, the adhesion force between the first film 40 and the first adhesive layer 50, and the adhesion force between the second film 41 and the second adhesive layer 51, so that when the release film is peeled off on the first adhesive layer 50 and the second adhesive layer 51, the protective film 30, the first film 40, the second film 41, the first adhesive layer 50, and the second adhesive layer 51 are not peeled off.
Step S13, referring to fig. 4, the auxiliary film 20 is covered on the display device 13, and the first film 40 is brought into contact with the intermediate region 131, and the second film 41 is brought into contact with the press-bonding region 132.
Specifically, the first film 40 is in contact with the intermediate zone 131 through the first glue layer 50, and the second film 41 is in contact with the crimp zone 132 through the second glue layer 51.
The position of the first space 401 and the position of the second space 501 correspond to the middle area 131, the projection of the first adhesive layer 50 on the display device 13 is completely located on the middle area 131, and the projection of the second adhesive layer 51 on the display device 13 is completely located on the press-connection area 132.
In an embodiment, the adhesion between the first film 40 and the first adhesive layer 50, the adhesion between the first adhesive layer 50 and the display device 13, the adhesion between the display device 13 and the substrate 12, and the adhesion between the substrate 12 and the carrier substrate 11 are substantially equal. Wherein the adhesive force between the protective film 30 and the first film 40, the adhesive force between the protective film 30 and the second film 41, and the adhesive force between the second film 41 and the second adhesive layer 51 are all larger than the adhesive force between the second adhesive layer 51 and the display device 13.
In another embodiment, when the auxiliary film 20 includes the release film, the release film is also required to be removed before proceeding to step S13.
In step S14, referring to fig. 5, the carrier substrate 11 is separated from the base plate 12 by a laser lift-off process.
Specifically, the interface between the carrier substrate 11 and the substrate 12 is first subjected to laser scanning treatment, and then the carrier substrate 11 is separated from the substrate 12 by mechanical peeling. I.e. the carrier substrate 11 is separated from the base substrate 12, the base substrate 12 remains integral with the display device 13.
In step S15, referring to fig. 6, a supporting film 60 is formed on the surface of the substrate 12 away from the auxiliary film 20.
In one embodiment, the adhesive force between the first film 40 and the first adhesive layer 50, the adhesive force between the first adhesive layer 50 and the display device 13, the adhesive force between the display device 13 and the substrate 12, and the adhesive force between the substrate 12 and the support film 60 are all greater than the adhesive force between the protective film 30 and the first film 40. Wherein the adhesion between the protective film 30 and the second film 41, the adhesion between the second film 41 and the second adhesive layer 51, and the adhesion between the second adhesive layer 51 and the display device 13 are sequentially reduced.
In step S16, referring to fig. 7, the protective film 30 and the second film 41 are removed to expose the crimp region 132.
In removing the second film 41, the second adhesive layer 51 needs to be removed together.
Since the adhesive force between the protective film 30 and the first film 40 and the adhesive force between the protective film 30 and the second film 41 are larger than the adhesive force between the second adhesive layer 51 and the display device 13, and the adhesive force between the first film 40 and the first adhesive layer 50, the adhesive force between the first adhesive layer 50 and the display device 13, the adhesive force between the display device 13 and the substrate 12, and the adhesive force between the substrate 12 and the support film 60 are larger than the adhesive force between the protective film 30 and the first film 40, the second film 41 and the second adhesive layer 51 are removed together when the protective film 30 is peeled off, and the first film 40, the first adhesive layer 50, the display device 13, the substrate 12, and the support film 60 are not removed.
The relationship between the adhesive force between the protective film 30 and the first film 40, the adhesive force between the protective film 30 and the second film 41, the adhesive force between the first film 40 and the first adhesive layer 50, the adhesive force between the first adhesive layer 50 and the display device 13, the adhesive force between the display device 13 and the substrate 12, the adhesive force between the substrate 12 and the support film 60, the adhesive force between the protective film 30 and the second film 41, the adhesive force between the second film 41 and the second adhesive layer 51, and the adhesive force between the second adhesive layer 51 and the display device 13 is not limited to the above list, as long as the second film 41 and the second adhesive layer 51 can be removed together at the time of tearing the protective film 30, and the first film 40, the first adhesive layer 50, the display device 13, the substrate 12, and the support film 60 can be prevented from being removed.
Step S17, mounting an electronic device on the crimp region 132.
In an embodiment, the electronic device may be a COF pad. Specifically, the COF pad is overlapped on the OLB pad of the crimp region 132, and further, other overlapping or connection is performed, to obtain a display device (not shown). In addition, step S17 may further include a packaging step, such as packaging the support film 60, the substrate 12, the display device 13, the first adhesive layer 50, the first film 40, and other structures to obtain a final display device.
It should be noted that the present disclosure does not require removal of the first film 40, the first adhesive layer 50, and the support film 60. I.e. the display device finally prepared comprises the first film 40, the first glue layer 50 and the support film 60.
The present disclosure can reduce expansion of the crimp region 132 due to the adhesiveness of the second adhesive layer 51 and the supportability of the second film 41 in the process of separating the carrier substrate 11 and the substrate 12 by the laser lift-off process, thereby maintaining the interval of the OLB pads on the crimp region 132 substantially unchanged, maintaining the overlapping area of the subsequent OLB pads and COF pads substantially unchanged, and thus improving the yield of the display device, by utilizing the supportability of the second film 41 and the weak adhesiveness of the second adhesive layer 51. An embodiment of the present disclosure provides an auxiliary film for manufacturing a display device, including a protective film, and first and second films which are co-layered and spaced apart on the protective film.
In one embodiment, the first film 40 may be a Polarizer (POL) or other optical film. In an embodiment, the material of the first film 40 is triacetate fiber or polyvinyl alcohol. The polaroid can be used for reducing the influence of external stray light on the display device, so that the display quality of the display device is improved. In an embodiment, the second film may be a polyethylene terephthalate (PET) film or other film material with good support. In one embodiment, the first film and the second film are spaced apart by a distance of 0.2mm to 1.5mm.
In an embodiment, the auxiliary film further comprises a first adhesive layer and a second adhesive layer. In an embodiment, the first adhesive layer is located on the first film, and two opposite sides of the first adhesive layer and two opposite sides of the first film are respectively flush. The first adhesive layer has higher adhesiveness and insulativity. In an embodiment, the material of the first adhesive layer includes at least one of acrylic adhesive and OCA optical adhesive.
In an embodiment, the second adhesive layer is located on the second film, and two opposite sides of the second adhesive layer are respectively flush with two opposite sides of the second film. Wherein the first adhesive layer and the second adhesive layer are arranged in the same layer and are separated from each other. In an embodiment, the distance between the first adhesive layer and the second adhesive layer is also 0.2 mm-1.5 mm. The second adhesive layer has lower viscosity and does not remain after being torn off. In an embodiment, the material of the second adhesive layer includes at least one of silica gel or polyurethane gel.
In one embodiment, the auxiliary film further comprises a release film. The release film is positioned on the first adhesive layer and the second adhesive layer, and the release film can be peeled off from the first adhesive layer and the second adhesive layer. The adhesive force between the release film and the first adhesive layer and the adhesive force between the release film and the second adhesive layer are smaller than the adhesive force between the protective film and the first film, the adhesive force between the protective film and the second film, the adhesive force between the first film and the first adhesive layer and the adhesive force between the second film and the second adhesive layer, so that the protective film, the first film, the second film, the first adhesive layer and the second adhesive layer are not peeled when the release film is peeled off from the first adhesive layer and the second adhesive layer.
In an embodiment, the adhesion between the first film 40 and the first adhesive layer 50 is greater than the adhesion between the first film 40 and the protective film 30, the adhesion between the second film 41 and the protective film 30, and the adhesion between the second film 41 and the second adhesive layer 51. The present disclosure also provides a display device prepared by the above preparation method.
The present disclosure is further illustrated by the following specific examples and comparative examples.
Example 1
(1) A display precursor is provided. The display precursor comprises a bearing substrate, a base plate and a display device which are sequentially stacked, wherein the surface of one side of the display device, which is far away from the base plate, comprises a middle area and a crimping area positioned at the edge of the middle area.
(2) Providing an auxiliary film. The auxiliary film comprises a protective film, a first film, a second film, a first adhesive layer, a second adhesive layer and a release film. The first film and the second film are both positioned on the protective film, and the first film and the second film are arranged at intervals. The first adhesive layer is positioned on the first film, and two opposite side surfaces of the first adhesive layer are respectively flush with two opposite side surfaces of the first film. The second adhesive layer is positioned on the second film, and two opposite side surfaces of the second adhesive layer are respectively flush with two opposite side surfaces of the second film. The release film is positioned on the first adhesive layer and the second adhesive layer.
(3) And removing the release film.
(4) And covering the auxiliary film after the release film is removed on the display precursor, and covering the first adhesive layer on the middle area and the second adhesive layer on the crimping area. The first and second spaces are located at the same position, and the projection of the first adhesive layer on the substrate is located on the middle region completely, and the projection of the second adhesive layer on the substrate is located on the crimping region completely. The bonding force between the protective film and the first film and the bonding force between the protective film and the second film are larger than the bonding force between the second adhesive layer and the display device, and the bonding force between the first film and the first adhesive layer, the bonding force between the first adhesive layer and the display device, the bonding force between the display device and the substrate, and the bonding force between the substrate and the carrier substrate are larger than the bonding force between the protective film and the first film.
(5) And carrying out laser scanning treatment on the interface between the bearing substrate and the base plate, and separating the bearing substrate from the base plate through mechanical stripping.
(6) And forming a support film on a surface of the substrate remote from the auxiliary film. The bonding force between the substrate and the support film is larger than the bonding force between the protective film and the first film, and the bonding force between the substrate and the support film, the bonding force between the substrate and the display device, the bonding force between the display device and the first adhesive layer and the bonding force between the first film and the first adhesive layer are equal.
(7) And removing the protective film, the second adhesive layer and the second film to expose the crimping region.
(8) And (3) lapping the COF bonding pad on the OLB bonding pad on the crimping area, and carrying out subsequent other lapping or connection, thus obtaining the display device after packaging.
Comparative example 1
(1) A display precursor is provided. The display precursor comprises a bearing substrate, a base plate and a display device which are sequentially stacked, wherein the surface of one side of the display device, which is far away from the base plate, comprises a middle area and a crimping area positioned at the edge of the middle area.
(2) The carrier substrate and the base plate are separated by a laser lift-off process.
(3) And providing a polarizer.
(4) And covering the polarizer on the middle area.
(5) And forming a support film on the surface of the substrate away from the polarizer.
(6) And overlapping the COF bonding pad on the OLB bonding pad on the crimping area, and carrying out subsequent other overlapping or connection without removing the first film, the first adhesive layer and the supporting film, and packaging to obtain the display device.
1000 display devices were prepared in example 1 and comparative example 1, respectively, and the average expansion ratio of the intermediate region in the substrates in example 1 and comparative example 1, and the yield of the display devices in example 1 and comparative example 1, respectively, were tested.
The test results show that: the average expansion ratio of the intermediate region in the substrate in example 1 was smaller than that in the substrate in comparative example 1. In addition, the test results also show that: the yield of the display device in example 1 was higher than that of the display device in comparative example 1. This illustrates that the second adhesive layer and the second film in embodiment 1 can reduce expansion of the intermediate region, thereby improving the yield of the display device.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present disclosure, which are described in more detail and detail, but are not to be construed as limiting the scope of the disclosure. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure. Accordingly, the scope of protection of the present disclosure should be determined by the following claims.
Claims (14)
1. A method of manufacturing a display device, comprising the steps of:
providing a display precursor, wherein the display precursor comprises a bearing substrate, a base plate and a display device which are sequentially stacked, and the surface of one side of the display device, which is far away from the base plate, comprises a middle area and a crimping area positioned at the edge of the middle area;
covering an auxiliary film on the display device, wherein the auxiliary film comprises a protective film, a first film and a second film, the first film and the second film are arranged on the protective film in the same layer at intervals, the first film contacts the middle area, and the second film contacts the crimping area;
separating the carrier substrate from the base plate by a laser lift-off process; and
and removing the protective film and the second film to expose the crimping region.
2. The method of manufacturing a display device according to claim 1, wherein the auxiliary film further comprises:
a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is arranged on the first film, and the second adhesive layer is arranged on the second film;
wherein when the auxiliary film is covered on the display device, the first adhesive layer contacts the middle region, and the second adhesive layer contacts the crimping region.
3. The method of manufacturing a display device according to claim 2, wherein an adhesive force between the protective film and the first film and an adhesive force between the protective film and the second film are both larger than an adhesive force between the second adhesive layer and the display device.
4. The method for manufacturing a display device according to claim 1, wherein after the separation of the carrier substrate from the base plate by the laser lift-off treatment and before the removal of the protective film and the second film, the method further comprises:
and forming a support film on the surface of the substrate away from the auxiliary film.
5. The method of manufacturing a display device according to claim 4, wherein an adhesive force between the first film and the first adhesive layer, an adhesive force between the first adhesive layer and the display device, and an adhesive force between the substrate and the support film are each larger than an adhesive force between the protective film and the first film.
6. The method of manufacturing a display device according to claim 5, wherein an adhesive force between the protective film and the second film, an adhesive force between the second film and the second adhesive layer, and an adhesive force between the second adhesive layer and the display device are sequentially decreased.
7. The method according to any one of claims 2 to 5, wherein the material of the first adhesive layer includes at least one of acrylic adhesive and OCA optical adhesive; and/or
The second adhesive layer is made of at least one of silica gel and polyurethane gel; and/or
The first membrane is made of triacetate fiber or polyvinyl alcohol; and/or
The second film is made of polyethylene terephthalate; and/or
The bearing substrate is made of glass, metal or ceramic; and/or
The substrate is a flexible substrate, and the flexible substrate is made of polyimide, polyethylene, polypropylene or polystyrene.
8. The method of manufacturing a display device according to any one of claims 2 to 5, wherein the auxiliary film further comprises a release film on the first adhesive layer and the second adhesive layer, the method further comprising, before the covering of the auxiliary film on the display device:
and removing the release film.
9. The method for manufacturing a display device according to any one of claims 1 to 6, wherein a position where a space between the first film and the second film is located corresponds to the intermediate region; and/or
The first film and the second film are spaced apart by a distance of 0.2mm to 1.5mm.
10. The method for manufacturing a display device according to any one of claims 1 to 6, wherein the separating the carrier substrate from the substrate by a laser lift-off process specifically comprises:
performing laser scanning treatment on an interface between the bearing substrate and the base plate;
the carrier substrate is separated from the base plate by mechanical peeling.
11. The method for manufacturing a display device according to any one of claims 1 to 6, wherein after the removing of the protective film and the second film, the manufacturing method further comprises:
and mounting an electronic device on the crimping area.
12. An auxiliary film for manufacturing a display device, comprising:
a protective film; and
and the first film and the second film are arranged on the protective film at the same layer and interval.
13. The auxiliary film for manufacturing a display device according to claim 12, wherein the auxiliary film further comprises:
a first glue layer disposed on the first film;
a second glue layer disposed on the second film;
and the release film is positioned on the first adhesive layer and the second adhesive layer.
14. A display device manufactured by the manufacturing method according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210944608.4A CN117042566A (en) | 2022-08-08 | 2022-08-08 | Display device, preparation method thereof and auxiliary film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210944608.4A CN117042566A (en) | 2022-08-08 | 2022-08-08 | Display device, preparation method thereof and auxiliary film |
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| Publication Number | Publication Date |
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| CN117042566A true CN117042566A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210944608.4A Pending CN117042566A (en) | 2022-08-08 | 2022-08-08 | Display device, preparation method thereof and auxiliary film |
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| Country | Link |
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| CN (1) | CN117042566A (en) |
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2022
- 2022-08-08 CN CN202210944608.4A patent/CN117042566A/en active Pending
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