CN109285462B - Flexible display panel, manufacturing method thereof and flexible display device - Google Patents
Flexible display panel, manufacturing method thereof and flexible display device Download PDFInfo
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- CN109285462B CN109285462B CN201811516154.0A CN201811516154A CN109285462B CN 109285462 B CN109285462 B CN 109285462B CN 201811516154 A CN201811516154 A CN 201811516154A CN 109285462 B CN109285462 B CN 109285462B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The embodiment of the invention provides a flexible display panel, a manufacturing method thereof and a flexible display device, relates to the technical field of display, and improves the heat dissipation performance of the flexible display panel on the premise of ensuring that the flexible display panel has good bending performance and display performance. The flexible display panel comprises a flexible substrate and a display layer arranged on the flexible substrate; the flexible substrate comprises at least two flexible substrates, and particle materials with heat conduction performance are doped in at least one flexible substrate; and the concentration of the doped particle material in the flexible substrate increases in a direction away from the display layer. The flexible display panel is used for realizing picture display.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a flexible display panel, a manufacturing method thereof and a flexible display device.
[ background of the invention ]
At present, flexible display panels are widely used due to their excellent properties of being stretchable, foldable, bendable, and rollable.
The flexible display panel includes a flexible substrate and a display layer disposed on the flexible substrate, and in order to dissipate heat of the flexible display panel, a heat dissipation layer is usually attached to a side of the flexible substrate opposite to the display layer. However, since the heat dissipation layer is often formed of a material such as copper foil or graphite sheet, when the heat dissipation layer is attached to a flexible substrate, the heat dissipation layer affects the bending performance of the flexible display panel, and the heat dissipation layer also forms an electric field with a display device in the display layer, which affects the display performance.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a flexible display panel, a manufacturing method thereof, and a flexible display device, which improve heat dissipation performance of the flexible display panel on the premise of ensuring that the flexible display panel has good bending performance and display performance.
In one aspect, an embodiment of the present invention provides a flexible display panel, where the flexible display panel includes a flexible substrate and a display layer disposed on the flexible substrate;
the flexible substrate comprises at least two flexible substrates, and at least one flexible substrate is doped with particle materials with heat conduction performance; and the concentration of the particle material doped in the flexible substrate increases in a direction away from the display layer.
On the other hand, the embodiment of the invention provides a manufacturing method of a flexible display panel, which is applied to the flexible display panel; the manufacturing method comprises the following steps:
providing a glass substrate;
forming at least two flexible substrates on the glass substrate, wherein at least part of the flexible substrates are doped with particle materials with heat conduction performance, and the concentration of the particle materials doped in the flexible substrates is gradually reduced along the direction far away from the glass substrate to form a flexible substrate;
forming a display layer on the flexible substrate;
and peeling the glass substrate from the flexible substrate.
In still another aspect, a flexible display device includes the above flexible display panel.
One of the above technical solutions has the following beneficial effects:
by adopting the technical scheme provided by the embodiment of the invention, on one hand, the flexible substrate has heat conducting property by doping the particle material with heat conducting property in the flexible substrate, the heat generated by the flexible display panel can be led out through the flexible substrate, and further, the concentration of the particle material doped in the flexible substrate is increased progressively, namely, the heat conducting property of the flexible substrate is increased in a gradient manner, the heat generated by the flexible display panel is transferred downwards, the leading-out speed is higher, so that the leading-out of the heat can be accelerated, and the heat radiating performance of the flexible display panel is improved; on the other hand, compared with the prior art, the embodiment of the invention does not need to paste the radiating fins such as the copper foil and the graphite sheet on the flexible substrate, so that the influence of the radiating fins on the bending performance of the flexible display panel can be avoided, and the influence of the electric field generated by the radiating fins and the display device in the display layer on the display performance is avoided.
Therefore, by adopting the technical scheme provided by the embodiment of the invention, on the premise of ensuring that the flexible display panel has good bending performance and display performance, the heat generated by the flexible display panel can be quickly led out, and the heat dissipation performance of the flexible display panel is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a flexible substrate provided by an embodiment of the invention;
FIG. 3 is a schematic view of another structure of a flexible substrate according to an embodiment of the present invention;
FIG. 4 is a schematic view of another structure of a flexible substrate provided by an embodiment of the present invention;
FIG. 5 is a flow chart of a manufacturing method according to an embodiment of the present invention;
FIG. 6 is a flow chart of forming a flexible substrate according to an embodiment of the present invention;
FIG. 7 is another flow chart of forming a flexible substrate according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first and second may be used to describe the flexible substrates in the embodiments of the present invention, the flexible substrates should not be limited to these terms. These terms are only used to distinguish the flexible substrates from each other. For example, the first flexible substrate may also be referred to as a second flexible substrate, and similarly, the second flexible substrate may also be referred to as a first flexible substrate, without departing from the scope of embodiments of the present invention.
An embodiment of the present invention provides a flexible display panel, as shown in fig. 1, fig. 1 is a schematic structural diagram of the flexible display panel provided in the embodiment of the present invention, where the flexible display panel includes a flexible substrate 1 and a display layer 2 disposed on the flexible substrate 1. The flexible substrate 1 comprises at least two flexible substrates 3, and at least one flexible substrate 3 is doped with a particle material 4 with heat conduction performance; and the concentration of the doped particle material 4 in the flexible substrate 3 increases in a direction away from the display layer 2.
The flexible substrate 3 is a substrate having stretchable, foldable, bendable, and rollable properties, and may be made of a flexible material such as Polyimide (PI), Polycarbonate (PC), Polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyarylate (PAR), or glass Fiber Reinforced Plastic (FRP).
By adopting the flexible display panel provided by the embodiment of the invention, on one hand, the flexible substrate 3 has heat conductivity by doping the particle material 4 with heat conductivity in the flexible substrate 3, and the heat generated by the flexible display panel can be led out through the flexible substrate 3, and further, the concentration of the particle material 4 doped in the flexible substrate 3 is increased progressively, namely the heat conductivity of the flexible substrate 3 is increased in a gradient manner, and the heat generated by the flexible display panel is transferred downwards, so that the leading-out speed is higher, the leading-out of the heat can be accelerated, and the heat radiation performance of the flexible display panel is improved; on the other hand, compared with the prior art, in the embodiment of the invention, the radiating fins such as copper foils and graphite sheets do not need to be attached to the flexible substrate 3, so that the influence of the radiating fins on the bending performance of the flexible display panel can be avoided, and the influence of electric fields generated by the radiating fins and the display devices in the display layer 2 on the display performance is avoided.
Therefore, by adopting the flexible display panel provided by the embodiment of the invention, on the premise of ensuring that the flexible display panel has good bending performance and display performance, the heat generated by the flexible display panel can be quickly led out, and the heat dissipation performance of the flexible display panel is improved.
Optionally, the particle material 4 doped in the flexible substrate 3 may be a nanoparticle material or a microparticle material, wherein the nanoparticle material has better dispersibility and can be uniformly distributed in the flexible substrate 3, so that the heat dissipation uniformity of the flexible substrate 3 is improved.
Optionally, as shown in fig. 2, fig. 2 is a schematic structural diagram of the flexible substrate provided in the embodiment of the present invention, where the flexible substrate 1 includes a first flexible substrate 31 and a second flexible substrate 32, and the second flexible substrate 32 is located on a side of the first flexible substrate 31 facing away from the display layer 2. The first flexible substrate 31 is not doped with the particle material 4, and the second flexible substrate 32 is doped with the particle material 4. Compared with the flexible substrate 1 including a larger number of flexible substrates 3, the flexible substrate 1 includes only two flexible substrates 3, which not only ensures that the flexible substrate 1 has good bending performance and heat dissipation performance, but also avoids the flexible substrate 1 being too thick, and is more beneficial to realizing the light and thin design of the flexible display panel.
Further, the volume percentage concentration of the particle material 4 doped in the second flexible substrate 32 is a, and a is greater than or equal to 1% and less than or equal to 10%. Setting a to be between 1% and 10% can avoid too little doped particle material 4 to ensure that the heat dissipation performance of the second flexible substrate 32 is improved, and can also avoid too much doped particle material 4 from affecting the bending performance of the second flexible substrate 32.
Optionally, referring to fig. 2 again, the first particle material 41 with thermal conductivity and insulation properties is doped in the second flexible substrate 32, and on the premise that heat is quickly conducted away by using the first particle material 41, because the first particle material 41 has insulation properties, the first particle material 41 can also be prevented from affecting an electric field of the display device, thereby ensuring that the flexible display panel has good display properties.
Optionally, as shown in fig. 3, fig. 3 is another schematic structural diagram of the flexible substrate according to an embodiment of the present invention, the second flexible substrate 32 is further doped with a second type of particle material 42 having heat conduction and electrical conduction properties, the second flexible substrate 32 is further doped with the second type of particle material 42, based on the electrical conduction properties of the second type of particle material 42, static charges in the flexible display panel can be led out through the second type of particle material 42, so that the static charges are prevented from remaining inside the flexible display panel and affecting the display device, and the static electricity prevention capability of the flexible display panel is improved.
The first type of particle material 41 is a nanoparticle material or a microparticle material, and the second type of particle material 42 is a nanoparticle material or a microparticle material.
In addition, in order to avoid the influence of the too high concentration of the second type particle material 42 on the electric field of the display device and the influence on the normal display, the concentration of the second type particle material 42 doped in the second flexible substrate 32 may be made smaller than the concentration of the first type particle material 41 doped in the second flexible substrate.
Further, when the second flexible substrate 32 is dopedWhen the volume percentage concentration of the first type particle material 41 is a1, and the volume percentage concentration of the second type particle material 42 is a2, in order to avoid the concentration of the second type particle material 42 being too high, the a1 and the a2 may satisfy:
optionally, as shown in fig. 4, fig. 4 is a schematic structural diagram of a flexible substrate according to an embodiment of the present invention, where the flexible substrate 1 includes a third flexible substrate 33 and a fourth flexible substrate 34, and the fourth flexible substrate 34 is located on a side of the third flexible substrate 33 facing away from the display layer 2. Wherein the third flexible substrate 33 and the fourth flexible substrate 34 are both doped with the particle material 4, and the concentration of the particle material doped in the fourth flexible substrate 34 is higher than the concentration of the particle material 4 doped in the third flexible substrate 33.
So set up, the heat conductivility of third flexible substrate 33 and fourth flexible substrate 34 increases progressively, and the heat that flexible display panel produced is the transmission down more, and it is just faster to derive the speed to thermal derivation has been accelerated, flexible display panel's heat dispersion has been improved. Moreover, the flexible substrate 1 only comprises the two flexible substrates 3, so that the phenomenon that the flexible substrate 1 is too thick is avoided, and the light and thin design of the flexible display panel is more favorably realized.
Optionally, referring to fig. 4 again, the third flexible substrate 33 is doped with the first type particle material 41 with thermal conductive and insulating properties, and the fourth flexible substrate 34 is doped with the first type particle material 41 and the second type particle material 42 with thermal conductive and conductive properties.
The second particle material 42 with the conductive property is doped in the fourth flexible substrate 34, the fourth flexible substrate 34 has the electrostatic conductive property besides the heat dissipation property, and the electrostatic charge in the flexible display panel can be led out through the second particle material 42, so that the influence of the electrostatic charge remaining in the flexible display panel on the display device is avoided, and the anti-static capability of the flexible display panel is improved. In addition, compared with doping the second type of particle materials 42 in the third flexible substrate 33 and doping the second type of particle materials 42 in the fourth flexible substrate 34, the distance between the second type of particle materials 42 and the display layer 2 can be increased, and the influence of the second type of particle materials 42 on the electric field of the display device and the influence on the display performance can be avoided.
In addition, in order to avoid the influence of the too high concentration of the second type particle material 42 on the electric field of the display device and the influence on the normal display, the concentration of the second type particle material 42 doped in the fourth flexible substrate 34 may be made smaller than the concentration of the first type particle material 41 doped in the fourth flexible substrate.
It should be noted that the structure of the flexible substrate 1 shown in fig. 2 to fig. 4 is only schematic illustration, in other alternative embodiments of the present invention, the flexible substrate 1 may also include three or more flexible substrates 3, and the specific number of the flexible substrates 3 may be limited according to actual situations.
Optionally, the first type of particle material 41 includes one or more of ceramic particles, silicon dioxide particles, or silicon nitride particles. Illustratively, the thermal conductivity (W/Mk) of the silicon dioxide particles is 7.6, and the thermal conductivity (W/Mk) of the silicon nitride particles is 490, and the first type of particle material 41 has good thermal conductivity.
Optionally, the second type of particle material 42 includes one or more of carbon nanotubes, graphene, aluminum powder, or copper powder. Wherein the conductivity S/m of the carbon nano tube is 181-1000, and the conductivity S/m of the graphene is 0.1 x 106～1.2*106The aluminum powder has a conductivity S/m of 3.5 x 107The conductivity S/m of the copper powder is 5.8 x 107The second-type particle material 42 has both good thermal conductivity and good electrical conductivity.
The embodiment of the invention also provides a manufacturing method of the flexible display panel, and the manufacturing method is applied to the flexible display panel. As shown in fig. 5, fig. 5 is a flowchart of a manufacturing method according to an embodiment of the present invention, where the manufacturing method includes:
step S1: a glass substrate is provided.
Step S2: at least two flexible substrates 3 are formed on a glass substrate, at least part of the flexible substrates 3 are doped with particle materials 4 with heat conduction performance, and the concentration of the doped particle materials 4 in the flexible substrates 3 is decreased along the direction far away from the glass substrate to form the flexible substrate 1.
Specifically, taking the flexible substrate 1 shown in fig. 2 as an example, first, a solution for forming the second flexible substrate 32 is coated on a glass substrate, and a curing process is performed to form the second flexible substrate 32; then, the solution for forming the first flexible substrate 31 is coated on the second flexible substrate 32, and a curing process is performed to form the first flexible substrate 31, so as to form a complete flexible substrate 1 structure.
Step S3: a display layer 2 is formed on a flexible substrate 1.
Step S4: the glass substrate is peeled from the flexible substrate 1.
By adopting the manufacturing method provided by the embodiment of the invention, the flexible substrate 3 in the flexible substrate 1 has good heat conductivity, and the heat conductivity of the flexible substrate 3 is further increased in a gradient manner, so that the heat generated by the flexible display panel is transferred downwards at a higher speed, thereby accelerating the heat conduction and improving the heat dissipation performance of the flexible display panel. In addition, compared with the prior art, by adopting the manufacturing method, the radiating fins such as copper foil and graphite sheet do not need to be pasted on the flexible substrate 3, so that the influence of the radiating fins on the bending performance of the flexible display panel can be avoided, and the influence of the electric field generated by the radiating fins and the display device in the display layer 2 on the display performance is avoided.
Optionally, with reference to fig. 2 to 4, when the flexible substrate 3 is only doped with the first type particle material 41 with thermal conductivity and insulation properties, as shown in fig. 6, fig. 6 is a flowchart of forming the flexible substrate according to an embodiment of the present invention, where a process of forming the flexible substrate 3 includes:
step K1: the first type of particle material 41 is added to the polyamic acid solution and placed in an ultrasonic instrument.
Step K2: stirring for 1-3 hours under the condition of 100-200W of ultrasonic power to form the polyimide composite solution doped with the first-class particle material 41.
Under the condition, the first-type particle materials 41 can be uniformly dispersed in the polyimide composite solution and further uniformly distributed in the formed flexible substrate 3, so that heat can be uniformly and quickly led out.
Step K3: the polyimide composite solution is coated on a glass substrate and cured to form the flexible substrate 3 doped with the first type particle material 41.
Optionally, with reference to fig. 3 and fig. 4, when the flexible substrate 3 is doped with the first type particle material 41 with thermal conductive insulating property and the second type particle material 42 with thermal conductive property, as shown in fig. 7, fig. 7 is another flowchart of forming the flexible substrate according to an embodiment of the present invention, where the process of forming the flexible substrate 3 includes:
step H1: the first type of particle material 41 and the second type of particle material 42 are added to the polyamic acid solution and placed in an ultrasonic instrument.
In this step, the first particle material 41 and the second particle material 42 may be sequentially added to the polyamic acid solution, or the first particle material 41 and the second particle material 42 may be mixed first, and then the mixed first particle material 41 and second particle material 42 may be added to the polyamic acid solution.
Step H2: stirring for 1-3 hours under the condition of 100-200W of ultrasonic power to form a polyimide composite solution doped with the first particle material 41 and the second particle material 42.
Under the condition, the first type particle material 41 and the second type particle material 42 can be uniformly dispersed in the polyimide composite solution, and further uniformly distributed in the formed flexible substrate 3, so that heat can be uniformly and quickly conducted out.
Step H3: the polyimide composite solution is coated on a glass substrate and subjected to a curing process to form the flexible substrate 3 doped with the first-type particle material 41 and the second-type particle material 42.
An embodiment of the present invention further provides a flexible display device, as shown in fig. 8, fig. 8 is a schematic structural diagram of the flexible display device provided in the embodiment of the present invention, and the flexible display device includes the flexible display panel 100. The specific structure of the flexible display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the flexible display device shown in fig. 8 is only a schematic illustration, and the flexible display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic paper book, or a television.
Because the flexible display device provided by the embodiment of the invention comprises the flexible display panel 100, the flexible display device can quickly guide heat generated by the flexible display device and improve the heat dissipation performance of the flexible display device on the premise of ensuring that the flexible display device has good bending performance and display performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A flexible display panel is characterized by comprising a flexible substrate and a display layer arranged on the flexible substrate;
the flexible substrate comprises at least two flexible substrates, and at least one flexible substrate is doped with particle materials with heat conduction performance; and the concentration of the doped particle material in the flexible substrate increases in a direction away from the display layer;
the flexible substrate comprises a first flexible substrate and a second flexible substrate, and the second flexible substrate is positioned on one side of the first flexible substrate, which faces away from the display layer;
the first flexible substrate is not doped with the particle materials, and the second flexible substrate is doped with the particle materials;
the second flexible substrate is doped with a first particle material with heat conduction insulating property and a second particle material with heat conduction electric conduction property;
alternatively, the first and second electrodes may be,
the flexible substrate comprises a third flexible substrate and a fourth flexible substrate, and the fourth flexible substrate is positioned on one side, back to the display layer, of the third flexible substrate;
the third flexible substrate and the fourth flexible substrate are both doped with the particle material;
the third flexible substrate is doped with a first particle material with heat conduction insulating property, and the fourth flexible substrate is doped with the first particle material and a second particle material with heat conduction electric conductivity.
2. The flexible display panel of claim 1, wherein the particulate material is a nanoparticle material or a microparticle material.
3. The flexible display panel of claim 1, wherein the second flexible substrate is doped with the particulate material at a concentration of A, 1% to 10% by volume.
4. The flexible display panel of claim 1, wherein the second flexible substrate is doped with a concentration of the second type of particle material that is less than a concentration of the first type of particle material.
5. The flexible display panel of claim 4, wherein the first type of particle material has a volume percent concentration of A1, the second type of particle material has a volume percent concentration of A2,
6. the flexible display panel of claim 1, wherein the fourth flexible substrate is doped with a concentration of the second type of particle material that is less than a concentration of the first type of particle material.
7. The flexible display panel of claim 1, wherein the first type of particle material comprises one or more of ceramic particles, silicon dioxide particles, or silicon nitride particles.
8. The flexible display panel of claim 1, wherein the second type of particle material comprises one or more of carbon nanotubes, graphene, aluminum powder, or copper powder.
9. A method for manufacturing a flexible display panel, wherein the method is applied to the flexible display panel according to claim 1;
the manufacturing method comprises the following steps:
providing a glass substrate;
forming at least two flexible substrates on the glass substrate, wherein at least part of the flexible substrates are doped with particle materials with heat conduction performance, and the concentration of the particle materials doped in the flexible substrates is gradually reduced along the direction far away from the glass substrate to form a flexible substrate;
forming a display layer on the flexible substrate;
and peeling the glass substrate from the flexible substrate.
10. The method according to claim 9, wherein the flexible substrate is doped with a first particle material having thermal conductivity and insulation properties;
the process of forming the flexible substrate includes:
adding the first type of particle material into a polyamic acid solution, and placing the first type of particle material in an ultrasonic instrument;
stirring for 1-3 hours under the condition of 100-200W of ultrasonic power to form a polyimide composite solution doped with the first particle material;
and coating the polyimide composite solution on the glass substrate, and carrying out curing treatment to form the flexible substrate doped with the first type of particle material.
11. The method according to claim 9, wherein the flexible substrate is doped with a first particle material having thermal and electrical insulation properties and a second particle material having thermal and electrical conductivity properties;
the process of forming the flexible substrate includes:
adding the first type of particle material and the second type of particle material into a polyamic acid solution, and placing the polyamic acid solution in an ultrasonic instrument;
stirring for 1-3 hours under the condition of 100-200W of ultrasonic power to form a polyimide composite solution doped with the first particle material and the second particle material;
and coating the polyimide composite solution on the glass substrate, and carrying out curing treatment to form the flexible substrate doped with the first type of particle material and the second type of particle material.
12. A flexible display device, characterized in that the flexible display device comprises a flexible display panel according to any one of claims 1 to 8.
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| CN111028684B (en) * | 2019-12-06 | 2021-08-03 | 深圳市华星光电半导体显示技术有限公司 | Flexible substrate and preparation method thereof |
| CN111129030A (en) * | 2019-12-17 | 2020-05-08 | 武汉华星光电半导体显示技术有限公司 | Back plate and display panel |
| CN112490274B (en) * | 2020-11-30 | 2022-08-09 | 武汉天马微电子有限公司 | Display panel and display device |
| KR20230111662A (en) * | 2022-01-17 | 2023-07-26 | 삼성디스플레이 주식회사 | Display device and method of manufacturing for the same |
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| CN104465667A (en) * | 2014-12-01 | 2015-03-25 | 京东方科技集团股份有限公司 | Flexible panel, method for manufacturing flexible panel and flexile display device |
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| CN107652432A (en) * | 2017-09-28 | 2018-02-02 | 无锡顺铉新材料有限公司 | A kind of heat conduction Kapton |
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