CN115064071B - Bearing device and thinning method of display structure - Google Patents
Bearing device and thinning method of display structure Download PDFInfo
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- CN115064071B CN115064071B CN202210708601.2A CN202210708601A CN115064071B CN 115064071 B CN115064071 B CN 115064071B CN 202210708601 A CN202210708601 A CN 202210708601A CN 115064071 B CN115064071 B CN 115064071B
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- 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]
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- 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
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Abstract
The embodiment of the invention discloses a bearing device and a thinning method of a display structure, wherein an acid-proof film layer and an acid-proof adhesive layer can realize single-sided thinning of the display structure; the low thermal expansion coefficient of the metal foil supporting layer ensures that the display structure does not warp during separation, and the thinning precision is improved; the magnetic property of the metal foil supporting layer can be utilized to absorb one side of the acid-proof film layer on the bearing plate with controllable magnetism by utilizing the magnetic absorption effect, so that the bearing plate is placed in thinning reaction equipment to etch the display structure, the non-magnetism of the bearing plate can be controlled, the display structure is separated from the bearing plate, and the problem that the thinned display structure is broken when the bearing plate is separated by external force is avoided; after the display structure is thinned and separated from the bearing plate, the display structure is separated from the metal foil supporting layer by heating the thermal separation adhesive layer, so that the problem that the display structure is broken when the display structure is separated from the metal foil supporting layer and the acid-proof film layer by external force is avoided.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a bearing device and a method for thinning a display structure.
Background
Along with the continuous development of display products, the size of display equipment is also larger and larger, and the display effect is also continuously improved. But as the size of the display device increases, difficulties are created in the handling of the display device. To facilitate handling of larger size display devices, the ability of the display device to be locally bendable or rollable is often required.
Currently, in order to achieve a flexible or rollable property of a display device, it is generally necessary to thin a display structure of the display device. The larger the size of the display device is, the larger the thinning depth is, the more easily broken is in the thinning process, particularly, the single-sided thinning of the oversized display structure needs to be attached to the bearing plate for etching, at present, the main attaching mode is that firstly, an acid-proof film is used for attaching one side of the display structure to be thinned, then, one side of the acid-proof film is attached to the bearing plate, only one display structure to be thinned can be attached at a time, then, a product attached with the display structure to be thinned is placed into a thinning reaction device, and hydrofluoric acid reacts with the display structure to realize the thinning of the display structure. After the single-sided thinning of the display structure is completed, the display structure and the acid-proof film are separated from the bearing plate by adopting external force, the problem that the display structure is broken due to the separation of the display structure from the bearing plate and the acid-proof film can occur, and the efficiency of the existing single-sided thinning process is lower.
Disclosure of Invention
The embodiment of the invention provides a bearing device and a thinning method of a display structure, which are used for solving the problems that the display structure, a bearing plate and an acid-proof film are separated and broken in the related art and the efficiency of the existing single-sided thinning process is low.
The embodiment of the invention provides a bearing device which is used for bearing a display assembly; the display assembly includes:
the display structure to be thinned comprises a first surface and a second surface which are oppositely arranged, wherein the second surface is a light emitting surface of the display structure, and the second surface is a side to be thinned of the display structure;
a thermal separation adhesive layer attached to the first surface of the display structure;
a metal foil support layer attached to a side of the thermal separation glue layer facing away from the display structure; the metal foil supporting layer is made of invar alloy;
the acid-proof film layer is attached to one side of the metal foil supporting layer, which is away from the display structure;
an acid-proof adhesive layer attached to the side surfaces around the display structure;
the bearing device comprises a controllable magnetic bearing plate, and the surface of the acid-proof film layer in the display assembly, which is away from one side of the display structure, is magnetically adsorbed with the controllable magnetic bearing plate.
Optionally, in the carrying device provided by the embodiment of the present invention, the controllable magnetic carrying plate includes: the magnetic control device comprises a bearing body, a controllable magnetic structure and a magnetic control switch, wherein the controllable magnetic structure is positioned in the bearing body; the magnetic control switch is used for controlling the magnetism of the controllable magnetic structure so as to enable the display assembly to be adsorbed or separated from the controllable magnetic bearing plate.
Optionally, in the carrying device provided by the embodiment of the present invention, a surface of the controllable magnetic carrying plate, which is attached to the display assembly, is a plane.
Optionally, in the carrying device provided by the embodiment of the present invention, two opposite surfaces of the controllable magnetic carrying plate are both adsorbed with one of the display components.
Optionally, in the carrying device provided by the embodiment of the present invention, a carrying groove is provided on a surface of the controllable magnetic carrying plate, which is attached to the display assembly, and the display assembly is embedded in the carrying groove.
Optionally, in the carrying device provided by the embodiment of the present invention, two opposite surfaces of the controllable magnetic carrying plate are each provided with one carrying groove, and each carrying groove is adsorbed with one display component.
Optionally, in the above bearing device provided by the embodiment of the present invention, the bearing device further includes a clip;
the clip has a receiving cavity in which a display assembly adsorbed on the controllable magnetic carrier plate is received.
Optionally, in the above bearing device provided by the embodiment of the present invention, the clip is a U-shaped clip, a plurality of sliding rails are provided at the bottom of the clip, the sliding rails penetrate from one side to the other side of the bottom of the clip, and the end of the controllable magnetic bearing plate is clamped in the accommodating cavity of the clip through the sliding rails.
Optionally, in the foregoing carrying device provided by the embodiment of the present invention, an orthographic projection of the acid-proof film layer on the display structure completely covers the display structure.
Optionally, in the carrying device provided by the embodiment of the present invention, the acid-proof adhesive layer completely wraps the peripheral side surface of the display structure, and the acid-proof adhesive layer is disposed in contact with the acid-proof film layer.
Optionally, in the foregoing carrying device provided by the embodiment of the present invention, the size of the metal foil support layer, the size of the thermal separation glue layer, and the size of the acid-proof film layer are the same as the size of the display structure, and the acid-proof glue layer completely wraps the side surfaces around the whole periphery of the display structure, the thermal separation glue layer, the metal foil support layer, and the acid-proof film layer.
Optionally, in the foregoing carrying device provided by the embodiment of the present invention, the size of the metal foil supporting layer is smaller than the size of the display structure, the size of the metal foil supporting layer is the same as the size of the thermal separation glue layer, the acid-proof film layer covers the peripheral side surfaces of the metal foil supporting layer and the thermal separation glue layer, and the peripheral edge area of the acid-proof film layer covers the peripheral edge area of the display structure and is disposed in contact with the peripheral edge area of the display structure.
Optionally, in the foregoing carrying device provided by the embodiment of the present invention, a distance between an orthographic projection boundary of the metal foil supporting layer on the display structure and an edge of the display structure is greater than 5mm.
Optionally, in the foregoing carrying device provided by the embodiment of the present invention, the thermal separation adhesive layer is a planar structure, or the thermal separation adhesive layer is a grid structure.
Optionally, in the carrying device provided by the embodiment of the present invention, the thickness of the metal foil supporting layer is 0.08mm to 0.1mm.
Correspondingly, the embodiment of the invention also provides a thinning method of the display structure, which comprises the following steps:
the display component in the bearing device provided by any one of the embodiments of the invention and the controllable magnetic bearing plate are magnetically adsorbed together;
the display component and the controllable magnetic bearing plate which are adsorbed together are contained in a containing cavity of a clamping of the bearing device;
spraying an acidic etching liquid into the accommodating cavity of the clamp, wherein the acidic etching liquid reacts with the second surface of the display structure to thin the display structure;
controlling magnetism of the controllable magnetic bearing plate to separate the thinned display assembly from the controllable magnetic bearing plate;
and heating the thinned display assembly to separate the thermal separation adhesive layer from the thinned display structure.
The embodiment of the invention has the following beneficial effects:
the display component comprises a display structure to be thinned, a thermal separation adhesive layer, a metal foil supporting layer, an acid-proof film layer and an acid-proof adhesive layer, wherein the acid-proof film layer and the acid-proof adhesive layer can prevent other surfaces of the display structure except a second surface to be thinned from being corroded by sprayed acid etching liquid, and single-sided thinning of the display structure is realized; in addition, as the metal foil supporting layer made of invar alloy is used as the supporting substrate of the display structure, the supporting effect is effectively achieved after the display structure is thinned, and the metal foil supporting layer has the advantages of small thermal expansion coefficient and magnetism, wherein the low thermal expansion coefficient of the metal foil supporting layer can be used for supporting the display structure and radiating heat by means of the metal foil supporting layer, deformation of the display structure caused by temperature rise in the thinning process is reduced, the display structure can not warp during separation, and thinning precision is improved; the magnetic property of the metal foil supporting layer can be utilized to absorb one side of the acid-proof film layer, which is far away from the display structure, on the bearing plate with controllable magnetism by utilizing the magnetic absorption effect in the thinning process of the display structure, so that the display structure is etched in the thinning reaction equipment, and after the display structure is thinned, the bearing plate can be controlled to be nonmagnetic and the display structure is separated from the bearing plate, so that external force separation is not needed between the display structure and the bearing plate after the display structure is thinned, and the problem of breakage when the thinned display structure is separated from the bearing plate by adopting the external force is avoided; in addition, the display structure is attached to the metal foil supporting layer through the thermal separation adhesive layer, so that after the display structure is thinned and separated from the bearing plate, the display structure can be separated from the metal foil supporting layer through the heating thermal separation adhesive layer, the external force is not needed, and the problem that the display structure is broken when the display structure is separated from the metal foil supporting layer and the acid-proof film layer by the external force can be avoided.
Drawings
Fig. 1 is a schematic structural diagram of a display assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another display assembly according to an embodiment of the present invention;
FIG. 3 is a schematic plan view of the thermal release adhesive layer of FIGS. 1 and 2;
FIG. 4 is a schematic structural diagram of another display assembly according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display module according to an embodiment of the present invention;
FIG. 6 is a schematic plan view of the thermal release liner of FIGS. 4 and 5;
fig. 7 is a schematic structural diagram of a carrying device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a bonding structure of a carrier and a display assembly according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a magnetically controlled switch controlling the magnetism of a controllable magnetic structure;
FIG. 10 is a schematic diagram of a magnetically controlled switch controlling the absence of magnetism of a controllable magnetic structure;
FIG. 11 is a schematic diagram illustrating a structure of a display assembly and a controllable magnetic carrier plate according to an embodiment of the present invention;
FIG. 12 is a schematic view of a display assembly and a controllable magnetic carrier plate according to an embodiment of the present invention;
FIG. 13 is a schematic view of a display assembly and a controllable magnetic carrier plate according to an embodiment of the present invention;
FIG. 14 is a schematic view of a display assembly and a controllable magnetic carrier plate according to an embodiment of the present invention;
fig. 15 is a schematic flow chart of a thinning method of a display structure according to an embodiment of the present invention;
FIG. 16 is a schematic view showing the structure after it has been thinned within the carrier;
FIG. 17 is a schematic view of the thinned display structure with the controllable magnetic carrier plate removed from the clip;
FIG. 18 is a schematic diagram showing the display assembly separated from the controllable magnetic carrier plate after thinning;
FIG. 19 is a schematic view of a thinned display assembly;
FIG. 20 shows the thinned display structure separated from the thermal release liner;
fig. 21 is a structure after the metal foil support layer, the acid-proof film layer, and the acid-proof adhesive layer are separated from the thermal separation adhesive layer.
Detailed Description
In order to make the technical solution and advantages of the present invention more clear, a specific implementation of the method for thinning a carrying device and a display structure provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the following description of the preferred embodiments is provided for the purpose of illustrating and explaining the invention, and is not intended to limit the invention. And embodiments and features of embodiments in this application may be combined with each other without conflict.
The thickness, size and shape of the films in the drawings do not reflect the true proportions of the display assembly, and are intended to illustrate the present invention.
The embodiment of the invention also provides a bearing device, which is used for bearing a display assembly, as shown in fig. 1 and 2, and the display assembly comprises:
the display structure 1 to be thinned, wherein the display structure 1 comprises a first surface 11 and a second surface 12 which are oppositely arranged, the second surface 12 is a light emitting surface of the display structure 1, and the second surface 12 is a side of the display structure 1 to be thinned; specifically, during the thinning of the display structure 1, the second surface 12 is used as a surface on which hydrofluoric acid is sprayed during the thinning, that is, the second surface 12 is the thinning side of the display structure 1, and the first surface 11 is the non-thinning side of the display structure 1;
a thermal release adhesive layer 2 attached to the first surface 11 of the display structure 1; for example, the material of the thermal release adhesive layer 2 may include, but is not limited to, azodicarbonamide, diazoaminobenzene, or p-toluenesulfonyl hydrazide, etc.;
a metal foil support layer 3 attached to a side of the thermal separation glue layer 2 facing away from the display structure 1; the material of the metal foil support layer 3 is invar (also called invar); invar is a nickel-iron alloy, wherein the nickel content accounts for 36% -42%, and the invar has extremely low thermal expansion coefficient and magnetism;
the acid-proof film layer 4 is attached to one side of the metal foil supporting layer 3, which is away from the display structure 1;
the acid-proof adhesive layer 5 is attached to the side surfaces 13 around the display structure 1;
as shown in fig. 7, the carrying device comprises a controllable magnetic carrying plate 6; as shown in fig. 8, the surface of the acid-proof film layer 4 facing away from the display structure 1 in the display assembly is magnetically attracted to the controllable magnetic carrier plate 6.
According to the bearing device provided by the embodiment of the invention, the acid-proof film layer and the acid-proof adhesive layer can prevent other surfaces of the display structure except the second surface to be thinned from being corroded by the sprayed acid etching liquid, so that single-sided thinning of the display structure is realized; in addition, as the metal foil supporting layer made of invar alloy is used as the supporting substrate of the display structure, the supporting effect is effectively achieved after the display structure is thinned, and the metal foil supporting layer has the advantages of small thermal expansion coefficient and magnetism, wherein the low thermal expansion coefficient of the metal foil supporting layer can be used for supporting the display structure and radiating heat by means of the metal foil supporting layer, deformation of the display structure caused by temperature rise in the thinning process is reduced, the display structure is prevented from warping during separation, and thinning precision is improved; because the metal foil supporting layer in the display component has magnetism, in the thinning process of the display structure, one side of the acid-proof film layer, which is away from the display structure, can be adsorbed on the bearing plate with controllable magnetism by utilizing the magnetic adsorption effect so as to be placed in the bearing device for etching the display structure, and after the display structure is thinned, the bearing plate can be controlled to be nonmagnetic and the display structure is separated from the bearing plate, so that no external force separation is needed between the display structure and the bearing plate after the display structure is thinned, and the problem of breakage when the thinned display structure is separated from the bearing plate by adopting external force is avoided; in addition, the display structure is attached to the metal foil supporting layer through the thermal separation adhesive layer, so that after the display structure is thinned and separated from the bearing plate, the display structure can be separated from the metal foil supporting layer through the heating thermal separation adhesive layer, the external force is not needed, and the problem that the display structure is broken when the display structure is separated from the metal foil supporting layer and the acid-proof film layer by the external force can be avoided.
Optionally, the display structure to be thinned provided in the embodiment of the invention may be a single glass, or may be a display device, for example, a liquid crystal display device or an OLED display device, where when the display structure is a display device, the thinning may be a glass cover plate in the display device, the thickness before thinning may be 0.5mm to 1.0mm, and the thickness after thinning is less than 0.2mm, so that the thinning of a large depth of a large-size display structure may be achieved.
Optionally, the thickness of the metal foil supporting layer provided by the embodiment of the invention can be 0.05 mm-0.1 mm, and the thermal expansion coefficient of the metal foil supporting layer is less than 1.25 ppm/DEG C within the range of 20-60 ℃.
Optionally, the material of the acid-proof film layer provided in the embodiment of the present invention may be a polytetrafluoroethylene film, a polyethylene film or a polypropylene film, which is not limited in the embodiment of the present invention.
Optionally, the material of the acid-proof adhesive layer may be UV acid-proof adhesive, for example, the acid-proof adhesive layer may include a monomer, a composition and a prepolymer, and the prepolymer may include epoxy acrylate, urethane acrylate, polyether acrylate, polyester acrylate and acrylic resin, so that the acid-proof adhesive layer may be quickly attached to the side surface of the display structure to seal the side surface of the display structure, and prevent the side surface of the display structure from being corroded by an acidic etching solution. The acid-proof adhesive layer has certain elasticity, so that the strength of the display structure on the side surface can be enhanced, and the damage to the structure of the display structure caused by scratch on the side surface in the carrying process is avoided.
In a specific implementation, in the above-mentioned carrying device provided by the embodiment of the present invention, as shown in fig. 1 and fig. 2, the front projection of the acid-proof film layer 4 on the display structure 1 completely covers the display structure 1, so that when the second surface 11 (the thinned side) of the display structure 1 is etched by using the acid etching solution, the first surface 11 (the non-thinned side) of the display structure 1 can be completely prevented from being corroded by the acid etching solution.
In a specific implementation, in the carrying device provided by the embodiment of the present invention, as shown in fig. 1 and fig. 2, the acid-proof adhesive layer 5 completely wraps the peripheral side surface of the display structure 1, and the acid-proof adhesive layer 5 is disposed in contact with the acid-proof film layer 4. This can improve the sealing of the acid-proof adhesive layer 5 and the acid-proof film layer 4 to other parts of the display structure 1 than the second surface 12.
In a specific implementation, in the carrying device provided by the embodiment of the invention, as shown in fig. 1, the size of the metal foil support layer 3, the size of the thermal separation adhesive layer 2 and the size of the acid-proof film layer 4 are the same as those of the display structure 1, that is, the shape and size of the metal foil support layer 3, the shape and size of the thermal separation adhesive layer 2 and the shape and size of the acid-proof film layer 4 are completely consistent with those of the display structure 1, and the acid-proof adhesive layer 5 completely wraps the display structure 1, the thermal separation adhesive layer 2, the metal foil support layer 3 and the side surfaces around the whole circumference of the acid-proof film layer 4, so that the acid-proof adhesive layer 5 and the acid-proof film layer 4 can completely seal other parts of the display structure 1 except the second surface 12.
In a specific implementation, in the above-mentioned carrying device provided by the embodiment of the present invention, as shown in fig. 2, the size of the metal foil supporting layer 3 may be smaller than the size of the display structure 1, the size of the metal foil supporting layer 3 is the same as the size of the thermal separation adhesive layer 2, the acid-proof film layer 4 covers the peripheral side surfaces of the metal foil supporting layer 3 and the thermal separation adhesive layer 2, and the peripheral edge area of the acid-proof film layer 4 covers and contacts the peripheral edge area of the display structure 1, so that the acid-proof adhesive layer 5 and the acid-proof film layer 4 can also completely seal other parts of the display structure 1 except the second surface 12.
Alternatively, in the above-mentioned carrying device provided by the embodiment of the present invention, as shown in fig. 2, the distance d between the orthographic projection boundary of the metal foil support layer 3 on the display structure 1 and the edge of the display structure 1 may be greater than 5mm.
In a specific implementation, in the carrying device provided by the embodiment of the present invention, as shown in fig. 1-3, fig. 3 is a schematic plan view of the thermal separation adhesive layer 2 in fig. 1 and 2, where the thermal separation adhesive layer 2 has a planar structure, so that a manufacturing process of the thermal separation adhesive layer 2 can be reduced; as shown in fig. 4 to 6, fig. 6 is a schematic plan view of the thermal separation glue layer 2 in fig. 4 and 5, where the thermal separation glue layer 2 is a grid structure, so that the use of thermal separation glue materials can be reduced, and the contact area between the display structure 1 and the metal foil supporting layer 3 can be reduced, which is beneficial to separating the display structure 1 from the metal foil supporting layer 3 after thinning.
In a specific implementation, in the carrying device provided by the embodiment of the invention, the thickness of the metal foil supporting layer may be 0.08 mm-0.1 mm.
Alternatively, as shown in fig. 7 and 8, the carrier plate 6 is a strip-shaped plate-like structure having a certain thickness.
In specific implementation, in the display assembly provided by the embodiment of the present invention, as shown in fig. 7 and 8, the controllable magnetic carrier plate 6 includes: a carrying body 61, a controllable magnetic structure 62 inside the carrying body 61, and a magnetic control switch 63 outside the carrying body 61; the magnetic control switch 63 is used for controlling the magnetism of the controllable magnetic structure 62 so as to enable the display component to be adsorbed or separated from the controllable magnetic carrier plate 6. Specifically, during the thinning process of the display structure 1, the magnetic control switch 63 may be used to control the controllable magnetic structure 62 to have magnetism so as to make the bearing plate 6 have magnetism, so that the side of the acid-proof film layer 4 facing away from the display structure 1 is adsorbed on the bearing plate 6, and the display component is placed in the bearing device to etch the display structure 1; after the display structure 1 is thinned, the controllable magnetic structure 62 can be controlled to be nonmagnetic by the magnetic control switch 63 so as to enable the bearing plate 6 to be nonmagnetic, so that the display structure 1 and the bearing plate 6 are automatically separated, and therefore, no external force is required to be used for separating the display structure 1 from the bearing plate 6 after the display structure 1 is thinned, and the problem that the thinned display structure 1 and the bearing plate 6 are broken when the external force is used for separating is avoided.
Alternatively, as shown in fig. 9 and 10, fig. 9 and 10 only show the controllable magnetic structure 62 and the magnetic control switch 63 inside the controllable magnetic bearing plate 6 in fig. 7, the controllable magnetic structure 62 controls magnetism on two sides of the controllable magnetic bearing plate 6 through the magnetic control switch 63, the controllable magnetic structure 62 may be a plurality of magnetic blocks with rotatable S/N poles distributed inside the bearing body 61, and the magnetic control switch 63 may be a physical mechanical switch or an electromagnetic switch, for example, rotation of magnetic poles is realized through lifting of the magnetic control switch 63, so as to realize magnetic controllability of the controllable magnetic bearing plate 6; specifically, as shown in fig. 9, for example, by the pulling action of the magnetic control switch 63, the S pole and the N pole of the magnetic block are arranged in the horizontal direction, and at this time, both the S pole (end portion) and the N pole (end portion) of the magnetic block have magnetism, so that the controllable magnetic carrier plate 6 has magnetism; as shown in fig. 10, for example, by the pulling action of the magnetic control switch 63, the S pole and the N pole of the magnetic blocks are arranged in the vertical direction, and at this time, the S pole (end portion) and the N pole (end portion) of the adjacent two magnetic blocks are attracted to each other, so that the positions of the two magnetic blocks except the end portions are not magnetic, and thus the controllable magnetic carrier plate 6 is not magnetic.
Alternatively, as shown in fig. 7 and 8, the controllable magnetic structure 62 may control the magnetic properties of both sides of the controllable magnetic carrier plate 6, so that both sides of the controllable magnetic carrier plate 6 may be attached to the display assembly provided above.
In a specific implementation, in the display assembly provided by the embodiment of the present invention, as shown in fig. 11 and fig. 12, fig. 11 and fig. 12 are schematic diagrams of the display assembly shown in fig. 1 provided above by magnetic attraction on a controllable magnetic carrier plate, where a surface of the controllable magnetic carrier plate 6 attached to the display assembly may be a plane. Because the metal foil supporting layer 3 has magnetism, and the controllable magnetic structure 62 can control the magnetism of the two sides of the controllable magnetic bearing plate 6 through the magnetic control switch 63, the acid-proof film layer 4 generally does not influence the magnetism of the display component, so that the controllable magnetic bearing plate 6 and the display component can be well attached through magnetism.
In a specific implementation, in the display assembly provided in the embodiment of the present invention, as shown in fig. 11, the controllable magnetic carrier plate 6 may be a display assembly with one surface thereof being attached; alternatively, as shown in fig. 12, two opposite surfaces of the controllable magnetic bearing plate 6 may be both adsorbed with a display component, so that two display components may be fixed by one controllable magnetic bearing plate 6, thereby improving the acid etching efficiency of the display structure 1 of the display component.
In a specific implementation, in the display assembly provided by the embodiment of the present invention, as shown in fig. 13 and 14, a bearing groove 64 is provided on a surface of the controllable magnetic bearing plate 6, which is attached to the display assembly, and the display assembly is embedded in the bearing groove 64. Optionally, the controllable magnetic bearing plate 6 is in a strip-shaped plate structure with a certain thickness, a bearing groove 64 facing upwards is formed in the middle of the controllable magnetic bearing plate 6, and the notch of the bearing groove 64 and the surface of the controllable magnetic bearing plate 6 are positioned on the same horizontal line. When the display component is installed, the thermal separation adhesive layer 2, the metal foil supporting layer 3, the acid-proof film layer 4 and the acid-proof adhesive layer 5 attached to the first surface 11 of the display structure 1 can be embedded in the bearing groove 64, so that the controllable magnetic bearing plate 6 has certain supporting and limiting effects on the display component, the influence of deformation in the thinning process of the display structure 1 on the thinning precision is reduced, and fragments generated when the display structure 1 is separated from the controllable magnetic bearing plate 6 can be reduced.
Alternatively, the bearing body 61 may be a metal plate or an acryl plate, or other plates with a certain strength, which is not limited in the present invention.
In a specific implementation, in the display assembly provided by the embodiment of the present invention, as shown in fig. 13, the controllable magnetic carrier plate 6 may have a carrier groove 64 on one surface thereof; alternatively, as shown in fig. 14, two opposite surfaces of the controllable magnetic carrier plate 6 are provided with a carrier groove 64, and a display component is adsorbed at each carrier groove 64. Thus, one controllable magnetic bearing plate 6 can fix two display components, so that the acid etching efficiency of the display structure 1 of the display components is improved.
In a specific implementation, in the display assembly provided by the embodiment of the present invention, as shown in fig. 7 and fig. 8, the bearing device further includes a clip 7;
the clip 7 has a housing cavity 71, and a display component adsorbed on the controllable magnetic carrier plate 6 is housed in the housing cavity 71. In this way, a plurality of display components embedded on the controllable magnetic bearing plate 6 can be fixed in the accommodating cavity 71 of the clamp 7, so that the display structures 1 of the display components can be subjected to acid etching operation at the same time, and the display structures 1 of the display components can be protected to a certain extent while the acid etching efficiency of the display structures 1 of the display components is improved.
In a specific implementation, in the display assembly provided by the embodiment of the invention, as shown in fig. 7 and 8, the clip 7 is a U-shaped clip, the bottom of the clip 7 is provided with a plurality of slide rails 72, the slide rails 72 penetrate from one side to the other side along the bottom of the clip 7, and the end of the controllable magnetic bearing plate 6 is clamped in the accommodating cavity 71 of the clip 7 through the slide rails 72. Like this, when the fixed display module of inlaying on controllable magnetism loading board 6, can slide the tip of controllable magnetism loading board 6 from slide rail 72's tip to in clamping 7's the holding cavity for a plurality of display module of inlaying on controllable magnetism loading board 6 can the equipartition be arranged, and can make things convenient for the installation and the dismantlement of the display module of inlaying on controllable magnetism loading board 6, and then promote the acid etching efficiency of display module's display structure 1.
It should be noted that, fig. 8 is an example in which two opposite surfaces of the controllable magnetic carrier plate 6 attached to the display assembly are planar, and one display assembly is adsorbed to each of the opposite surfaces, i.e. the structure shown in fig. 12. Of course, in the embodiment, the opposite surfaces of the controllable magnetic carrier plate 6 shown in fig. 8, which are attached to the display assembly, may have the carrying grooves 64, i.e. the structure shown in fig. 14. Of course, the controllable magnetic carrier plate 6 shown in fig. 8 may also be a display assembly structure as shown in fig. 11 and 13. Of course, the display assembly of fig. 8, in which the controllable magnetic carrier plate 6 is attached, may also be the structure of fig. 2, 4 or 5.
In summary, in the embodiment of the invention, the deformation of the display structure caused by the temperature rise in the thinning process is reduced by adopting the metal foil supporting layer made of Invar material, so that the thinning precision is improved; and simultaneously, the rigidity is improved for carrying the display structure after the glass display structure is thinned. Meanwhile, the controllable magnetic bearing plate is used, the display structure is fixed on the controllable magnetic bearing plate by magnetism, a method of adhering glue in the related technology is abandoned, and the problem of separating fragile sheets by external force is avoided. And moreover, the display structure can be separated from the metal foil supporting layer in a heating thermal separation adhesive layer mode, the external force is not required, and the problem that the display structure is broken when the display structure is separated from the metal foil supporting layer and the acid-proof film layer by the external force can be avoided. In addition, the controllable magnetic bearing plate with controllable double-sided magnetism can be used for efficiently and conveniently attaching two display structures to be thinned at a time, and a plurality of bearing plates are placed at a time through the sliding rail of the clamp, so that the acid etching efficiency is greatly improved.
Based on the same inventive concept, the embodiment of the present invention further provides a method for thinning a display structure, as shown in fig. 15, including:
s1501, magnetically adsorbing the display component and the controllable magnetic bearing plate in the bearing device provided by the embodiment of the invention;
specifically, the display assembly shown in fig. 1 provided by the embodiment of the present invention and the controllable magnetic carrier plate 6 in fig. 7 provided by the embodiment of the present invention are magnetically absorbed together, as shown in fig. 12.
S1502, accommodating the display assembly and the controllable magnetic bearing plate which are adsorbed together in an accommodating cavity of a clamp of a bearing device;
specifically, the structure shown in fig. 12 is accommodated in the accommodating cavity 71 of the clip 7 of the carrying device, and more specifically, the end of the controllable magnetic carrying plate 6 shown in fig. 12 is snapped into the accommodating cavity 71 of the clip 7 by the slide rail 72, as shown in fig. 8.
S1503, spraying an acidic etching solution into the accommodating cavity of the clamp, wherein the acidic etching solution reacts with the second surface of the display structure to thin the display structure;
specifically, an acidic etching solution (for example, hydrofluoric acid) is sprayed into the accommodating cavity 71 of the clip 7 shown in fig. 8, and the acidic etching solution reacts with the second surface 12 of the display structure 1 to etch the second surface 12 of the display structure 1, so as to reduce the thickness of the display structure 1, as shown in fig. 16.
Next, the controllable magnetic carrier plate 6 shown in fig. 16 is taken out from the slide rail 72, as shown in fig. 17.
S1504, controlling magnetism of the controllable magnetic bearing plate to separate the thinned display assembly from the controllable magnetic bearing plate;
specifically, the controllable magnetic structure 62 in fig. 17 is controlled to be non-magnetic by the pulling action of the magnetic control switch 63, and the controllable magnetic carrier plate 6 is controlled to be non-magnetic as shown in fig. 18, so that the thinned display assembly is separated from the controllable magnetic carrier plate 6 as shown in fig. 19 (fig. 19 only shows the separated display assembly). Therefore, no external force is needed to be used for separation between the thinned display structure and the controllable magnetic bearing plate 6, and the problem that the thinned display structure is broken when the thinned display structure and the controllable magnetic bearing plate 6 are separated by the external force is avoided.
S1505, heating the thinned display assembly to separate the thermal separation adhesive layer from the thinned display structure;
specifically, the thinned display assembly shown in fig. 19 is heated, so that the thermal separation adhesive layer 2 is deformed, and the thermal separation adhesive layer 2 is separated from both the thinned display structure 1 and the metal foil support layer 3, so as to obtain the thinned display structure 1, as shown in fig. 20; therefore, the display structure is separated from the metal foil supporting layer without external force, and the problem that the display structure is broken when the display structure is separated from the metal foil supporting layer and the acid-proof film layer by external force can be avoided. Further, a composite structure of the metal foil support layer 3, the acid-proof film layer 4 and the acid-proof adhesive layer as shown in fig. 21 is obtained, and the metal foil support layer 3 can be separated by an external force so as to be reused.
Finally, the thinned display structure 1 shown in fig. 20 may be subjected to related processes such as handling.
The display component comprises a display structure to be thinned, a thermal separation adhesive layer, a metal foil supporting layer, an acid-proof film layer and an acid-proof adhesive layer, wherein the acid-proof film layer and the acid-proof adhesive layer can prevent other surfaces of the display structure except a second surface to be thinned from being corroded by sprayed acid etching liquid, and single-sided thinning of the display structure is realized; in addition, as the metal foil supporting layer made of invar alloy is used as the supporting substrate of the display structure, the supporting effect is effectively achieved after the display structure is thinned, and the metal foil supporting layer has the advantages of small thermal expansion coefficient and magnetism, wherein the low thermal expansion coefficient of the metal foil supporting layer can be used for supporting the display structure and radiating heat by means of the metal foil supporting layer, deformation of the display structure caused by temperature rise in the thinning process is reduced, the display structure is prevented from warping during separation, and thinning precision is improved; the magnetic property of the metal foil supporting layer can be utilized to absorb one side of the acid-proof film layer, which is far away from the display structure, on the bearing plate with controllable magnetism by utilizing the magnetic absorption effect in the thinning process of the display structure, so that the display structure is etched in the thinning reaction equipment, and after the display structure is thinned, the bearing plate can be controlled to be nonmagnetic and the display structure is separated from the bearing plate, so that external force separation is not needed between the display structure and the bearing plate after the display structure is thinned, and the problem of breakage when the thinned display structure is separated from the bearing plate by adopting the external force is avoided; in addition, the display structure is attached to the metal foil supporting layer through the thermal separation adhesive layer, so that after the display structure is thinned and separated from the bearing plate, the display structure can be separated from the metal foil supporting layer through the heating thermal separation adhesive layer, the external force is not needed, and the problem that the display structure is broken when the display structure is separated from the metal foil supporting layer and the acid-proof film layer by the external force can be avoided.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (16)
1. The bearing device is characterized by being used for bearing the display assembly; the display assembly includes:
the display structure to be thinned comprises a first surface and a second surface which are oppositely arranged, wherein the second surface is a light emitting surface of the display structure, and the second surface is a side to be thinned of the display structure;
a thermal separation adhesive layer attached to the first surface of the display structure;
a metal foil support layer attached to a side of the thermal separation glue layer facing away from the display structure; the metal foil supporting layer is made of invar alloy;
the acid-proof film layer is attached to one side of the metal foil supporting layer, which is away from the display structure;
an acid-proof adhesive layer attached to the side surfaces around the display structure;
the bearing device comprises a controllable magnetic bearing plate, and the surface of the acid-proof film layer in the display assembly, which is away from one side of the display structure, is magnetically adsorbed with the controllable magnetic bearing plate.
2. The carrier of claim 1, wherein the controllable magnetic carrier plate comprises: the magnetic control device comprises a bearing body, a controllable magnetic structure and a magnetic control switch, wherein the controllable magnetic structure is positioned in the bearing body; the magnetic control switch is used for controlling the magnetism of the controllable magnetic structure so as to enable the display assembly to be adsorbed or separated from the controllable magnetic bearing plate.
3. The carrier of claim 1, wherein the surface of the controllable magnetic carrier plate to which the display assembly is attached is planar.
4. A carrier as claimed in claim 3, wherein the controllable magnetic carrier plate has one of the display elements attached to opposite surfaces thereof.
5. The carrying device according to claim 1, wherein a carrying groove is formed in a surface of the controllable magnetic carrying plate, which is attached to the display assembly, and the display assembly is embedded in the carrying groove.
6. The carrier of claim 5, wherein the controllable magnetic carrier plate has one of the carrying grooves on each of opposite surfaces thereof, and one of the display modules is attached to each of the carrying grooves.
7. The carrier according to any one of claims 1-6, further comprising a clip;
the clip has a receiving cavity in which a display assembly adsorbed on the controllable magnetic carrier plate is received.
8. The carrying device of claim 7, wherein the clip is a U-shaped clip, a plurality of sliding rails are provided at the bottom of the clip, the sliding rails penetrate from one side to the other side of the bottom of the clip, and the end of the controllable magnetic carrying plate is clamped in the accommodating cavity of the clip through the sliding rails.
9. The carrier of claim 1, wherein the orthographic projection of the acid resistant film layer on the display structure completely covers the display structure.
10. The carrier of claim 9, wherein the acid-proof adhesive layer completely wraps around the side surface of the display structure, and the acid-proof adhesive layer is in contact with the acid-proof film layer.
11. The carrier of claim 10, wherein the dimensions of the metal foil support layer, the thermal release adhesive layer, and the acid-proof film layer are the same as the dimensions of the display structure, and the acid-proof adhesive layer completely encapsulates the entire peripheral side surfaces of the display structure, the thermal release adhesive layer, the metal foil support layer, and the acid-proof film layer.
12. The carrier of claim 10, wherein the metal foil support layer has a size smaller than the display structure, the metal foil support layer has a size identical to the thermal release adhesive layer, the acid-proof film layer covers the metal foil support layer and the thermal release adhesive layer on the peripheral side surfaces, and the acid-proof film layer has a peripheral edge area covering the display structure and contacting the peripheral edge area.
13. The carrier of claim 12, wherein a distance between an orthographic projection boundary of the metal foil support layer on the display structure and an edge of the display structure is greater than 5mm.
14. The carrier according to any one of claims 9 to 13, wherein the thermal release glue layer is a planar structure or the thermal release glue layer is a grid-like structure.
15. The carrier of any one of claims 9-13, wherein the metal foil support layer has a thickness of 0.08mm to 0.1mm.
16. A method for thinning a display structure, comprising:
magnetically attracting the display assembly of the carrier device of any one of claims 1-15 to a controllable magnetic carrier plate;
the display component and the controllable magnetic bearing plate which are adsorbed together are contained in a containing cavity of a clamping of the bearing device;
spraying an acidic etching liquid into the accommodating cavity of the clamp, wherein the acidic etching liquid reacts with the second surface of the display structure to thin the display structure;
controlling magnetism of the controllable magnetic bearing plate to separate the thinned display assembly from the controllable magnetic bearing plate;
and heating the thinned display assembly to separate the thermal separation adhesive layer from the thinned display structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708601.2A CN115064071B (en) | 2022-06-21 | 2022-06-21 | Bearing device and thinning method of display structure |
| PCT/CN2023/088879 WO2023246257A1 (en) | 2022-06-21 | 2023-04-18 | Display assembly, bearing device, and thinning method for display structure |
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| CN202210708601.2A CN115064071B (en) | 2022-06-21 | 2022-06-21 | Bearing device and thinning method of display structure |
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| JP2015063096A (en) * | 2013-09-26 | 2015-04-09 | フリージア・マクロス株式会社 | Metal foil with carrier and production method of laminated substrate using the metal foil with carrier |
| CN206635229U (en) * | 2017-04-05 | 2017-11-14 | 信利光电股份有限公司 | A kind of fixing device of glass substrate thinning single surface technique |
| CN108319403A (en) * | 2017-11-22 | 2018-07-24 | 汕头超声显示器技术有限公司 | A kind of manufacturing method of ultra-thin capacitance touch screen |
| CN109192760A (en) * | 2018-08-31 | 2019-01-11 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting display panel and its manufacturing method |
| CN110950541A (en) * | 2019-12-19 | 2020-04-03 | 苏州凯利昂光电科技有限公司 | Method for thinning single surface of glass |
| CN111681985A (en) * | 2020-06-23 | 2020-09-18 | 广东聚华印刷显示技术有限公司 | Display panel stripping method |
| CN113345938A (en) * | 2021-05-17 | 2021-09-03 | 深圳市华星光电半导体显示技术有限公司 | Display panel, strengthening method thereof and display device |
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| WO2023246257A1 (en) | 2023-12-28 |
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