CN107994063B - Magnetic rubber material, magnetic rubber film, laminating method and AMOLED display device - Google Patents

Magnetic rubber material, magnetic rubber film, laminating method and AMOLED display device Download PDF

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CN107994063B
CN107994063B CN201711354884.0A CN201711354884A CN107994063B CN 107994063 B CN107994063 B CN 107994063B CN 201711354884 A CN201711354884 A CN 201711354884A CN 107994063 B CN107994063 B CN 107994063B
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magnetic
film layer
magnetic film
component
bonding
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CN107994063A (en
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高司恒
王剑波
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • 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

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract

The invention provides a magnetic adhesive material, a magnetic adhesive film, a laminating method and an AMOLED display device. The magnetic glue material has the property of reversible solidification, and can improve the rework yield of the bonding process, thereby improving the yield of the bonding process. The magnetic adhesive film provided by the invention comprises the magnetic film layer prepared by adopting the magnetic adhesive material, and the yield of the laminating process can be improved. The laminating method of the invention adopts the magnetic adhesive film to realize the lamination of the two parts, can improve the rework yield of the laminating process, further improve the yield of the laminating process and reduce the production cost. The AMOLED display device disclosed by the invention adopts the glue film containing the magnetic glue material to realize the bonding of at least two parts, so that the bonding yield can be improved, and the production yield and the product quality of the AMOLED display device are improved.

Description

Magnetic rubber material, magnetic rubber film, laminating method and AMOLED display device
Technical Field
The invention relates to the technical field of display, in particular to a magnetic adhesive material, a magnetic adhesive film, a laminating method and an AMOLED display device.
Background
The flat display device has the advantages of thin body, power saving, no radiation and the like, and is widely applied. Conventional flat panel Display devices mainly include Liquid Crystal Displays (LCDs) and Organic Light Emitting Displays (OLEDs).
The OLED display is a new flat panel display device, and has the advantages of simple preparation process, low cost, low power consumption, high brightness, wide application range of working temperature, light and thin volume, high response speed, easy realization of color display and large-screen display, easy realization of matching with an integrated circuit driver, easy realization of flexible display and the like, so the OLED display has wide application prospect.
OLEDs can be classified into two broad categories, namely, direct addressing and thin film transistor Matrix addressing, namely, Passive Matrix OLEDs (PMOLEDs) and Active Matrix OLEDs (AMOLEDs) according to driving methods. The AMOLED has pixels arranged in an array, belongs to an active display type, has high luminous efficiency, and is generally used as a large-sized display device with high definition.
At present, the liquid crystal display industry has already advanced into the mature stage, and a Flexible AMOLED (AMOLED) is a new growth point of the future display industry and can meet the high requirements of the market on mobile portable products. As shown in fig. 1, the conventional flexible AMOLED display includes a copper (Cu) heat dissipation Plate 110, a Foam (Foam) heat conduction Plate 120, a Back Plate (Back Plate)130, a flexible AMOLED display panel 200, a touch screen (TP)140, a circular Polarizer (POL)150, and a display screen glass 160, which are sequentially stacked from bottom to top; the flexible AMOLED display panel 200 includes: the light emitting diode comprises a flexible PI (polyimide) substrate 210, a Buffer layer (Buffer)220, a Low Temperature Polysilicon (LTPS) TFT layer 230, an OLED light emitting layer 240 and a thin film encapsulation structure layer (TFE)250 which are sequentially stacked from bottom to top.
In the flexible AMOLED display, any two adjacent components of the copper heat dissipation plate 110, the foam heat conduction plate 120, the back plate 13, the flexible AMOLED display panel 200, the touch screen 140, the circular polarizer 150, and the display screen glass 160 are all bonded together through the adhesive material 300, so the bonding process is a main process in the manufacturing process of the flexible AMOLED display, however, due to unstable yield of the bonding process, defects such as foreign matters, bubbles, or stains often occur between the bonded two components, and this situation usually requires reworking (Rework) to save the defective products, where the reworking refers to peeling off the two components bonded together by the adhesive material again and then bonding again.
The Adhesive material 300 used in the conventional bonding process of the flexible AMOLED display is usually an Optical Clear Adhesive (OCA), which has high viscosity and can ensure adhesion stability and weather resistance, however, the OCA has high viscosity, so that peeling during rework is difficult, and the success rate of rework is low.
As shown in fig. 2, when the poor adhesion between the display screen glass 160 and the circular polarizer 150 is repeated, the display screen glass 160 needs to be peeled off from the circular polarizer 150, and since the adhesive force of the adhesive material 300 between the display screen glass 160 and the circular polarizer 150 is strong, a large external force needs to be applied to peel off the display screen glass 160 from the circular polarizer 150, which easily causes the falling off (peeling) of the thin film encapsulation structure layer 250 from the OLED light emitting layer 240, so that the flexible AMOLED display panel 200 is poor, which causes the failure of adhesion (peeling) and wastes the cost. Therefore, a method for increasing the rework yield of the bonding process is needed in the art to increase the yield of the bonding process of the flexible AMOLED display and reduce the production cost.
Disclosure of Invention
The invention aims to provide a magnetic adhesive material which has the property of reversible solidification and can improve the yield of a bonding process.
The invention also provides a magnetic adhesive film, which comprises the magnetic film layer prepared by the magnetic adhesive material, and can improve the rework yield of the bonding process, further improve the yield of the bonding process and reduce the production cost.
The invention also aims to provide a laminating method, the magnetic adhesive film is adopted to realize the lamination between the two parts, the laminating yield is high, and the laminating effect is good.
The invention also aims to provide the AMOLED display device, and the adhesive film containing the magnetic adhesive material is adopted to realize the adhesion between at least two parts, so that the adhesion yield can be improved, and the production yield and the product quality of the AMOLED display device can be improved.
In order to achieve the above object, the present invention provides a magnetic adhesive material, which includes a matrix and magnetic particles dispersed in the matrix, wherein the matrix includes a polymerizable monomer and a solvent, and the magnetic particles include magnetic nanoparticles and oligomers modified on the surfaces of the magnetic nanoparticles.
Specifically, the material of the magnetic nanoparticles comprises ferroferric oxide; the oligomer is a polymer with the molecular weight of less than 1500 and the molecular length of no more than 5 nanometers; the oligomer comprises one or more of amide oligomers and carboxylic acid oligomers.
Specifically, the polymerizable monomer comprises a polyethylene glycol modified diamine compound; the solvent is an organic solvent, and the organic solvent comprises polyurethane.
The invention also provides a magnetic adhesive film, which comprises a first magnetic film layer and a second magnetic film layer which are attached together, wherein the first magnetic film layer and the second magnetic film layer are two independent film bodies, the first magnetic film layer and the second magnetic film layer are in a colloid state, and the first magnetic film layer and the second magnetic film layer are made of the magnetic adhesive material.
Specifically, the magnetic adhesive film further comprises a first non-magnetic film layer attached to the surface of one side, far away from the second magnetic film layer, of the first magnetic film layer, and a second non-magnetic film layer attached to the surface of one side, far away from the first magnetic film layer, of the second magnetic film layer; the materials of the first non-magnetic film layer and the second non-magnetic film layer both comprise organic resin.
The invention also provides a fitting method, which comprises the following steps: providing the magnetic adhesive film and a first component and a second component which need to be attached together; the magnetic adhesive film is adopted to adhere the first component and the second component together to form an adhering structure; and curing the first magnetic film layer and the second magnetic film layer in the magnetic adhesive film to firmly bond the first component and the second component together.
The process of curing the first magnetic film layer and the second magnetic film layer in the magnetic adhesive film comprises the following steps:
heating the attaching structure to a first temperature, applying a magnetic field around the attaching structure, and enabling the first magnetic film layer and the second magnetic film layer to respectively perform reversible curing reaction to be changed into a solid state;
checking the bonding effect of the first component and the second component, if the bonding is not poor, heating the bonding structure to a second temperature, melting the first magnetic film layer and the second magnetic film layer into a whole third magnetic film layer, crosslinking oligomers on the surfaces of the magnetic particles and polymerizable monomers in the matrix to enable the third magnetic film layer to generate irreversible curing reaction and become a solid state, and finishing the bonding process; the second temperature is higher than the first temperature;
if the bonding is poor, performing a rework process, wherein the rework process comprises: removing the magnetic field around the attaching structure, and respectively converting the first magnetic film layer and the second magnetic film layer from a solid state to a colloid state; separating the first magnetic film layer from the second magnetic film layer along the binding surface of the first magnetic film layer and the second magnetic film layer, and further separating the first component from the second component; removing the adhesive materials adhered to the first component and the second component, and adopting a new magnetic adhesive film to attach the first component and the second component again;
and after the rework process is finished, checking the bonding effect of the first component and the second component, if poor bonding does not occur, heating the bonding structure to a second temperature, melting the first magnetic film layer and the second magnetic film layer into a whole third magnetic film layer, crosslinking oligomers on the surfaces of the magnetic particles and polymerizable monomers in the matrix to enable the third magnetic film layer to be subjected to irreversible curing reaction and become a solid state, and finishing the bonding process.
Specifically, the first temperature is 40-50 ℃; the second temperature is 90-110 ℃.
Applying a magnetic field around the conformable structure while heating the conformable structure to a second temperature.
The invention also provides an AMOLED display device, which comprises a back plate, an AMOLED display panel, a circular polarizer and display screen glass which are sequentially stacked;
at least two adjacent components in the back plate, the AMOLED display panel, the circular polarizer and the display screen glass are adhered together by glue films, wherein at least one glue film comprises the magnetic glue material.
The invention has the beneficial effects that: the magnetic glue material has the property of reversible solidification, and can improve the rework yield of the bonding process, thereby improving the yield of the bonding process. The magnetic adhesive film provided by the invention comprises the magnetic film layer prepared by adopting the magnetic adhesive material, and the yield of the laminating process can be improved. The laminating method of the invention adopts the magnetic adhesive film to realize the lamination of the two parts, can improve the rework yield of the laminating process, further improve the yield of the laminating process and reduce the production cost. The AMOLED display device disclosed by the invention adopts the glue film containing the magnetic glue material to realize the bonding of at least two parts, so that the bonding yield can be improved, and the production yield and the product quality of the AMOLED display device are improved.
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
In the drawings, there is shown in the drawings,
fig. 1 is a schematic structural diagram of a conventional flexible AMOLED display;
FIG. 2 is a schematic diagram illustrating a thin film encapsulation structure layer falling off from an OLED light emitting layer due to rework of a bonding process;
FIG. 3 is an enlarged schematic view of magnetic particles in the magnetic rubber material according to the present invention;
FIG. 4 is a schematic structural diagram of a magnetic adhesive film according to a first embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a second embodiment of a magnetic adhesive film according to the present invention;
fig. 6 to 9 are schematic views illustrating a bonding method according to the present invention;
fig. 10 is a schematic structural diagram of the AMOLED display device of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 3 to 5, the present invention first provides a magnetic adhesive material, which includes a matrix 60 and magnetic particles 70 dispersed in the matrix 60, wherein the matrix 60 includes a polymerizable monomer and a solvent, and as shown in fig. 3, the magnetic particles 70 include magnetic nanoparticles 71 and oligomers 72 modified on the surfaces of the magnetic nanoparticles 71.
Specifically, the material of the magnetic nanoparticles 71 includes ferroferric oxide (Fe)3O4)。
Specifically, the particle diameter of the magnetic nanoparticles 71 is 1-100 nm.
Specifically, the polymerizable monomer comprises a polyethylene glycol (PEG) modified diamine compound.
Specifically, the solvent is an organic solvent, and the organic solvent comprises polyurethane.
Specifically, the oligomer 72 is a polymer with a molecular weight below 1500 and a molecular length not more than 5 nanometers.
Specifically, the oligomer 72 includes one or more of amide oligomers and carboxylic acid oligomers.
The magnetic glue material has the property of reversible solidification, and is specifically represented as follows:
heating the magnetic glue material to a first temperature, and when a magnetic field is applied around the magnetic glue material, performing reversible curing reaction on the magnetic glue material to change the magnetic glue material into a solid state; after the magnetic field is removed, the magnetic glue material is converted into a glue state from a solid state;
when the magnetic adhesive material is heated to a second temperature, the magnetic adhesive material is melted, and the oligomers 72 on the surface of the magnetic particles 70 are crosslinked with the polymerizable monomers in the matrix 60, so that the magnetic adhesive material is subjected to irreversible curing reaction and is changed into a solid state; wherein the second temperature is higher than the first temperature.
Specifically, the first temperature is 40-50 ℃; the second temperature is 90-110 ℃.
Specifically, under the action of the first temperature and the magnetic field, the mechanism of the reversible curing reaction of the magnetic glue material is as follows: after the temperature is properly raised, the fluidity of the magnetic adhesive material is increased, and the magnetic particles 70 are arranged along the magnetic lines of force under the action of the magnetic field force, so that the magnetic particles 70 are agglomerated under the action of the magnetic field force, the viscosity is greatly increased, and the magnetic adhesive material is changed into a solid state. When the magnetic field is removed, the magnetic particles 70 are re-dispersed due to the mutual repulsion between the magnetic particles 70, and the viscosity is rapidly reduced, so that the magnetic glue material is converted into a colloidal state.
Referring to fig. 4, the present invention provides a first embodiment of a magnetic adhesive film 40, which includes a first magnetic film 41 and a second magnetic film 42 bonded together, where the first magnetic film 41 and the second magnetic film 42 are two independent films, the first magnetic film 41 and the second magnetic film 42 are both in a colloid state, and the first magnetic film 41 and the second magnetic film 42 are both made of the magnetic adhesive material as described above.
Referring to fig. 5, the present invention provides a second embodiment of a magnetic film 40, which is different from the first embodiment in that: the magnetic adhesive film 40 further includes a first non-magnetic film 51 attached to the surface of the first magnetic film 41 away from the second magnetic film 42, and a second non-magnetic film 52 attached to the surface of the second magnetic film 42 away from the first magnetic film 41.
Compared with the first embodiment, the overall thickness of the magnetic adhesive film 40 of the second embodiment is not changed, and since the two film bodies of the first non-magnetic film layer 51 and the second non-magnetic film layer 52 are added to the magnetic adhesive film 40, the thicknesses of the first magnetic film layer 41 and the second magnetic film layer 42 can be reduced, and since the production cost of the first non-magnetic film layer 51 and the second non-magnetic film layer 52 is less than the production cost of the first magnetic film layer 41 and the second magnetic film layer 42, the production cost of the whole magnetic adhesive film 40 can be reduced.
Specifically, the material of each of the first non-magnetic film layer 51 and the second non-magnetic film layer 52 includes an organic resin, and preferably, the organic resin includes one or more of an epoxy resin and a polyacrylic resin.
Specifically, the first non-magnetic film layer 51 and the second non-magnetic film layer 52 both have good thermal stability, and the melting points of the first non-magnetic film layer 51 and the second non-magnetic film layer 52 both exceed 150 ℃.
The magnetic adhesive film provided by the invention comprises the magnetic film layer prepared by adopting the magnetic adhesive material, so that the rework yield of the laminating process can be improved, the yield of the laminating process is further improved, and the production cost is reduced.
Referring to fig. 6 to 9, based on the magnetic adhesive film 40, the present invention further provides a bonding method, including: as shown in fig. 6, the magnetic film 40 and the first member 81 and the second member 82 to be bonded together are provided; the magnetic adhesive film 40 is adopted to adhere the first component 81 and the second component 82 together to form an adhering structure 90; and curing the first magnetic film layer 41 and the second magnetic film layer 42 in the magnetic adhesive film 40, so that the first component 81 and the second component 82 are firmly bonded together.
Specifically, the process of curing the first magnetic film 41 and the second magnetic film 42 in the magnetic adhesive film 40 includes:
as shown in fig. 7, the bonded structure 90 is heated to a first temperature, a magnetic field is applied around the bonded structure 90, and the first magnetic film layer 41 and the second magnetic film layer 42 respectively undergo a reversible curing reaction to become a solid state.
Specifically, the first temperature is 40 ℃ to 50 ℃.
Specifically, the bonding method of the present invention utilizes a magnetic field to make the first magnetic film 41 and the second magnetic film 42 become solid through a reversible curing reaction, so as to fix the shapes of the first magnetic film 41 and the second magnetic film 42, avoid the glue overflow phenomenon, and make the result of the bonding effect check in the solid state more reliable.
Inspecting the bonding effect of the first member 81 and the second member 82, and if no poor bonding occurs, heating the bonding structure 90 to a second temperature, as shown in fig. 9, melting the first magnetic film layer 41 and the second magnetic film layer 42 into a whole third magnetic film layer 43, and crosslinking the oligomers 72 on the surface of the magnetic particles 70 with the polymerizable monomer in the matrix 60 to make the third magnetic film layer 43 undergo an irreversible curing reaction and become a solid state, and ending the bonding process; the second temperature is higher than the first temperature;
if the bonding is poor, performing a rework process, wherein the rework process comprises: removing the magnetic field around the attachment structure 90, and respectively converting the first magnetic film 41 and the second magnetic film 42 from the solid state to the colloid state (as shown in fig. 6); separating the first magnetic film 41 from the second magnetic film 42 along the joint surface of the first magnetic film 41 and the second magnetic film 42, and further separating the first component 81 from the second component 82 (as shown in fig. 8); removing the adhesive materials adhered to the first component 81 and the second component 82, and adhering the first component 81 and the second component 82 again by using a new magnetic adhesive film 40;
after the rework process is finished, the bonding effect of the first component 81 and the second component 82 is checked, if no bonding failure occurs, the bonding structure 90 is heated to a second temperature, as shown in fig. 9, the first magnetic film layer 41 and the second magnetic film layer 42 are melted into a whole third magnetic film layer 43, the oligomer 72 on the surface of the magnetic particle 70 is crosslinked with the polymerizable monomer in the matrix 60, so that the third magnetic film layer 43 is subjected to an irreversible curing reaction and becomes a solid state, and the bonding process is finished.
Specifically, the second temperature is 90 ℃ to 110 ℃.
Specifically, a magnetic field may or may not be applied around the conformable structure 90 when the conformable structure 90 is heated to the second temperature. Preferably, a magnetic field is applied around the conformable structure 90, because the application of the magnetic field helps to shape the third magnetic film 43, so that the third magnetic film 43 has a better shape after being cured.
Specifically, the method for inspecting the bonding effect of the first component 81 and the second component 82 is Automated Optical Inspection (AOI).
Specifically, the adhesion failure includes the occurrence of foreign matter, bubbles, dirt, or the like between the first member 81 and the second member 82.
Compared with the prior art, the reworking process of the attaching method is easy to realize, the success rate is high, the first magnetic film layer 41 and the second magnetic film layer 42 are not really cured during reworking, the adhesion force between the first magnetic film layer 41 and the second magnetic film layer 42 is small, the first magnetic film layer and the second magnetic film layer are easy to separate, the first component 81 and the second component 82 can be separated only by applying a small external force, the first component 81 and the second component 82 are prevented from being damaged, when the attaching method is applied to the attaching process of the flexible AMOLED display device, the flexible AMOLED display panel can be prevented from being damaged, and the production yield and the product quality of the flexible AMOLED display device are remarkably improved.
In addition, due to the presence of the magnetic nanoparticles 71, the cross-linking polymerization effect of the irreversible curing reaction of the third magnetic film layer 43 is stronger than that of a general cross-linking polymerization effect, and the adhesion force between the film layers can be improved, thereby ensuring the adhesion stability and weather resistance.
The laminating method of the invention adopts the magnetic adhesive film 40 to realize the lamination of the two parts, can improve the rework yield of the laminating process, further improve the yield of the laminating process and reduce the production cost.
Referring to fig. 10, based on the magnetic adhesive material, the invention further provides an AMOLED display device, which includes a backplane 13, an AMOLED display panel 20, a circular polarizer 15, and a display screen glass 16, which are sequentially stacked;
at least two adjacent components of the back plate 13, the AMOLED display panel 20, the circular polarizer 15 and the display screen glass 16 are adhered together by glue films, wherein at least one glue film comprises the magnetic glue material.
As a preferred embodiment of the present invention, as shown in fig. 10, the AMOLED display device includes a heat dissipation plate 11, a heat conduction plate 12, a back plate 13, an AMOLED display panel 20, a touch screen 14, a circular polarizer 15, and a display screen glass 16, which are sequentially stacked;
the heat dissipation plate 11 and the heat conduction plate 12 are adhered together through a first adhesive film 31; the heat conducting plate 12 and the back plate 13 are adhered together through a second adhesive film 32; the back plate 13 and the AMOLED display panel 20 are attached together through a third adhesive film 33; the AMOLED display panel 20 and the touch screen 14 are attached together through a fourth adhesive film 34; the touch screen 14 and the circular polarizer 15 are attached together through a fifth adhesive film 35; the circular polarizer 15 and the display screen glass 16 are attached together through a sixth adhesive film 36;
at least one of the first adhesive film 31, the second adhesive film 32, the third adhesive film 33, the fourth adhesive film 34, the fifth adhesive film 35, and the sixth adhesive film 36 is the above-mentioned magnetic adhesive film 40.
More preferably, the first adhesive film 31, the second adhesive film 32, the third adhesive film 33, the fourth adhesive film 34, the fifth adhesive film 35, and the sixth adhesive film 36 are all the above-mentioned magnetic adhesive films 40.
Specifically, the material of the heat dissipation plate 11 includes copper; the heat-conducting plate 12 has a foam structure. The heat generated by the AMOLED display panel 20 during operation is first conducted to the back plate 13, then conducted to the heat dissipation plate 11 through the heat conduction plate 12, and diffused to the air through the heat dissipation plate 11.
Specifically, the circular polarizer 15 is used to eliminate glare and improve display effect.
Specifically, the AMOLED display panel 20 includes: the flexible PI substrate 21, the buffer layer 22, the low-temperature polysilicon TFT layer 23, the OLED light emitting layer 24 and the thin film packaging component 25 are sequentially stacked from bottom to top. Since the flexible PI substrate 21 is used as the flexible substrate, the AMOLED display panel 20 is a flexible AMOLED display panel, and the AMOLED display device is a flexible AMOLED display device.
Specifically, the display screen glass 16 is 3D curved glass.
The AMOLED display device disclosed by the invention adopts the glue film containing the magnetic glue material to realize the bonding of at least two parts, so that the bonding yield can be improved, and the production yield and the product quality of the AMOLED display device are improved.
In summary, the present invention provides a magnetic adhesive material, a magnetic adhesive film, a bonding method and an AMOLED display device. The magnetic glue material has the property of reversible solidification, and can improve the rework yield of the bonding process, thereby improving the yield of the bonding process. The magnetic adhesive film provided by the invention comprises the magnetic film layer prepared by adopting the magnetic adhesive material, and the yield of the laminating process can be improved. The laminating method of the invention adopts the magnetic adhesive film to realize the lamination of the two parts, can improve the rework yield of the laminating process, further improve the yield of the laminating process and reduce the production cost. The AMOLED display device disclosed by the invention adopts the glue film containing the magnetic glue material to realize the bonding of at least two parts, so that the bonding yield can be improved, and the production yield and the product quality of the AMOLED display device are improved.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims (7)

1. The magnetic adhesive film (40) is characterized by comprising a first magnetic film layer (41) and a second magnetic film layer (42) which are bonded together, wherein the first magnetic film layer (41) and the second magnetic film layer (42) are two independent film bodies, the first magnetic film layer (41) and the second magnetic film layer (42) are in a colloid state, the first magnetic film layer (41) and the second magnetic film layer (42) are both made of a magnetic adhesive material, the magnetic adhesive material comprises a base body (60) and magnetic particles (70) dispersed in the base body (60), the base body (60) comprises polymerizable monomers and a solvent, and the magnetic particles (70) comprise magnetic nanoparticles (71) and oligomers (72) modified on the surfaces of the magnetic nanoparticles (71).
2. The magnetic adhesive film (40) of claim 1, further comprising a first non-magnetic film (51) attached to a side surface of the first magnetic film (41) away from the second magnetic film (42), and a second non-magnetic film (52) attached to a side surface of the second magnetic film (42) away from the first magnetic film (41); the materials of the first non-magnetic film layer (51) and the second non-magnetic film layer (52) comprise organic resin.
3. A bonding method is characterized by comprising: providing a magnetoadhesive film (40) as claimed in claim 1 and a first part (81) and a second part (82) to be bonded together; the first component (81) and the second component (82) are attached together by the magnetic adhesive film (40) to form an attaching structure (90); and curing the first magnetic film layer (41) and the second magnetic film layer (42) in the magnetic adhesive film (40) to firmly bond the first component (81) and the second component (82).
4. The bonding method according to claim 3, wherein the step of curing the first magnetic film layer (41) and the second magnetic film layer (42) of the magnetic adhesive film (40) comprises:
heating the laminated structure (90) to a first temperature, applying a magnetic field around the laminated structure (90), and enabling the first magnetic film layer (41) and the second magnetic film layer (42) to respectively perform reversible curing reaction and become solid;
inspecting the bonding effect of the first component (81) and the second component (82), if poor bonding does not occur, heating the bonding structure (90) to a second temperature, melting the first magnetic film layer (41) and the second magnetic film layer (42) into a whole third magnetic film layer (43), and crosslinking oligomers (72) on the surfaces of the magnetic particles (70) and polymerizable monomers in the matrix (60) to enable the third magnetic film layer (43) to undergo an irreversible curing reaction and become a solid state, so that the bonding process is finished; the second temperature is higher than the first temperature;
if the bonding is poor, performing a rework process, wherein the rework process comprises:
removing the magnetic field around the attaching structure (90), and respectively converting the first magnetic film layer (41) and the second magnetic film layer (42) from a solid state to a colloid state; separating the first magnetic film layer (41) from the second magnetic film layer (42) along the joint surface of the first magnetic film layer (41) and the second magnetic film layer (42), and further separating the first component (81) from the second component (82); removing the adhesive materials adhered to the first component (81) and the second component (82), and bonding the first component (81) and the second component (82) again by adopting a new magnetic adhesive film (40);
and after the rework process is finished, checking the bonding effect of the first component (81) and the second component (82), if poor bonding does not occur, heating the bonding structure (90) to a second temperature, melting the first magnetic film layer (41) and the second magnetic film layer (42) into a whole third magnetic film layer (43), and crosslinking the oligomer (72) on the surface of the magnetic particle (70) and the polymerizable monomer in the matrix (60) to enable the third magnetic film layer (43) to generate irreversible curing reaction and become a solid state, so that the bonding process is finished.
5. The laminating method of claim 4, wherein the first temperature is between 40 ℃ and 50 ℃; the second temperature is 90-110 ℃.
6. The conforming method according to claim 4 wherein a magnetic field is applied around the conforming structure (90) while the conforming structure (90) is heated to the second temperature.
7. The AMOLED display device is characterized by comprising a back plate (13), an AMOLED display panel (20), a circular polarizer (15) and display screen glass (16) which are sequentially stacked;
at least two adjacent components of the back plate (13), the AMOLED display panel (20), the circular polarizer (15) and the display screen glass (16) are adhered together by using adhesive films, wherein at least one adhesive film comprises the magnetic adhesive film according to claim 1.
CN201711354884.0A 2017-12-15 2017-12-15 Magnetic rubber material, magnetic rubber film, laminating method and AMOLED display device Active CN107994063B (en)

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