CN114242850A - Micro LED finished product and preparation method of micro LED finished product - Google Patents
Micro LED finished product and preparation method of micro LED finished product Download PDFInfo
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- CN114242850A CN114242850A CN202111490188.9A CN202111490188A CN114242850A CN 114242850 A CN114242850 A CN 114242850A CN 202111490188 A CN202111490188 A CN 202111490188A CN 114242850 A CN114242850 A CN 114242850A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
- H10H20/0363—Manufacture or treatment of packages of optical field-shaping means
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Abstract
The embodiment of the invention provides a miniature LED finished product and a preparation method thereof, relating to the technical field of display. The micro LED finished product is prepared by a micro LED finished product preparation method, wherein the micro LED finished product preparation method comprises the steps of preparing a micro LED array, and then spraying ink on the prepared micro LED array by using electrofluid spray printing equipment, so that the ink covers the micro LED to be used for preparing the optical lens. And heating and curing the micro LED coated with the ink to obtain a micro LED finished product. The current jet printing equipment is used for dispensing each micro LED in the micro LED array, the size of ink drops jetted by the current jet printing equipment can be smaller than 10 micrometers, so that each single micro LED in the micro LED array can be used for preparing an optical lens, light divergence is reduced, and the light extraction rate of the front side is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a miniature LED finished product and a preparation method of the miniature LED finished product.
Background
Micro LED device refers to an LED light emitting device with a size of the order of 20 microns, i.e. a Micro-LED device. Micro-LED display is used as the next generation of mainstream display technology, and compared with the existing Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED) display, the Micro-LED display has the advantages of high brightness, low energy consumption, long service life, high response speed and the like. As an LED display device, light extraction efficiency is very important for micro LED devices, directly affecting their brightness and energy consumption.
However, the current method for improving the light extraction efficiency of the LED device mainly includes increasing an optical lens to reduce light divergence during device packaging, thereby improving the light extraction efficiency of the front surface. For Micro-LED devices, due to the fact that the size of the device is small, the Micro-LED display resolution is high, the inter-pixel distance is small (below 20 um), and the size of an optical lens prepared by traditional dispensing is large, so that the lens cannot be prepared for each pixel point independently.
Disclosure of Invention
The object of the present invention includes, for example, providing a micro LED product and a method for manufacturing the micro LED product, which can perform dispensing on each micro LED in a micro LED array by an electrofluid spray printing apparatus, so as to prepare an optical lens for each individual pixel point on the micro LED array, reduce light divergence, and thus improve front light extraction efficiency.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a method for preparing a micro LED product, including:
preparing a micro LED array;
using electrofluid spray printing equipment to spray and print ink on the micro LED array, so that the ink covers the micro LED and is used for preparing an optical lens;
and heating and curing the micro LED coated with the ink to obtain a micro LED finished product.
In an alternative embodiment, the step of printing ink on the micro LED array by using an electrofluid printing apparatus includes:
and a spray head of the electrofluid spray printing equipment is aligned with one miniature LED in the miniature LED array, and the ink is extruded onto the miniature LED array to cover the single miniature LED.
In an alternative embodiment, the step of printing ink on the micro LED array by using an electrofluid printing apparatus further includes:
moving the nozzle and aligning to another micro LED in the micro LED array, extruding the ink to the micro LED, and repeating the above steps until all the micro LEDs in the micro LED array are coated with the ink.
In an alternative embodiment, the step of printing ink on the micro LED array by using an electrofluid printing apparatus further includes:
and moving the micro LED array, aligning the nozzle with another micro LED in the micro LED array, pressing the ink to the micro LED, and repeating the steps until all the micro LEDs in the micro LED array are coated with the ink.
In an alternative embodiment, the step of printing ink on the micro LED array by using an electrofluid printing apparatus includes:
the nozzle of the electrofluid spray printing device is aligned with one micro LED in the micro LED array, the ink is extruded to the single micro LED, and meanwhile, the nozzle continuously extrudes the ink, so that the ink covers at least two micro LEDs simultaneously.
In an alternative embodiment, the step of printing ink on the micro LED array by using an electrofluid printing apparatus further includes:
moving the nozzle and aligning another micro LED in the micro LED array which is not coated with the ink, and/or;
moving the micro LED array and aligning the nozzle with another micro LED which is not coated with ink in the micro LED array;
such that all of the micro LEDs in the array of micro LEDs are coated with the ink.
In an alternative embodiment, the step of printing ink on the micro LED array using an electrofluidic printing apparatus comprises:
set up on the miniature LED array and prevent black piece, prevent that black piece is formed by connecting a plurality of anti-ink grids, at least one miniature LED is located in the anti-ink grid, the anti-ink grid is used for preventing a plurality of adjacent the ink takes place to interfere.
In an alternative embodiment, the step of printing ink on the micro LED array using an electrofluidic printing apparatus comprises:
preparing the ink: melting the ink in a fluid form from the organic material from which the optical lens is made, or;
dissolving a material for preparing the optical lens in an organic solvent, or;
and taking the organic material fluid added with the curing agent for preparing the optical lens as the ink.
In an alternative embodiment, the material of the optical lens is epoxy resin, polystyrene or silicone.
In a second aspect, the invention provides a micro LED product, which is prepared by the method for preparing a micro LED product according to any one of the foregoing embodiments.
The beneficial effects of the embodiment of the invention include, for example: the embodiment provides a method for preparing a micro LED finished product, which comprises the steps of preparing a micro LED array, and then spraying ink on the prepared micro LED array by using electrofluid spraying equipment, so that the ink covers the micro LED to prepare an optical lens. And heating and curing the micro LED coated with the ink to obtain a micro LED finished product. The current jet printing equipment is used for dispensing each micro LED in the micro LED array, the size of ink drops jetted by the current jet printing equipment can be smaller than 10 micrometers, so that each single micro LED in the micro LED array can be used for preparing an optical lens, light divergence is reduced, and the light extraction rate of the front side is improved.
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, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart in a method for manufacturing a finished micro LED product according to a first embodiment;
fig. 2 is a schematic view illustrating ink jetting to a micro LED array for the first time in a method for manufacturing a finished micro LED product according to a first embodiment;
FIG. 3 is a schematic diagram of an inkjet array of repetitive micro LEDs in a method for manufacturing a finished micro LED product according to a first embodiment;
fig. 4 is a schematic structural diagram of a finished micro LED product according to a first embodiment;
fig. 5 is a schematic diagram of ink-jetting to a micro LED array for the first time in a method for manufacturing a finished micro LED product according to a second embodiment;
fig. 6 is a schematic diagram of repeatedly jetting ink to the micro LED array in a method for manufacturing a finished micro LED product according to a second embodiment;
fig. 7 is a schematic structural diagram of a finished micro LED product according to a second embodiment.
Icon: 1000-micro LED finished product; 100-micro LED array; 110-micro LEDs; 200-a spray head; 210-ink; 300-optical lens.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Micro LED device refers to an LED light emitting device with a size of the order of 20 microns, i.e. a Micro-LED device. Micro-LED display is used as the next generation of mainstream display technology, and compared with the existing Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED) display, the Micro-LED display has the advantages of high brightness, low energy consumption, long service life, high response speed and the like. As an LED display device, light extraction efficiency is very important for micro LED devices, directly affecting their brightness and energy consumption.
However, the current method for improving the light extraction efficiency of the LED device mainly includes increasing an optical lens to reduce light divergence during device packaging, thereby improving the light extraction efficiency of the front surface. For Micro-LED devices, due to the fact that the size of the device is small, the Micro-LED display resolution is high, the inter-pixel distance is small (below 20 um), and the size of an optical lens prepared by traditional dispensing is large, so that the lens cannot be prepared for each pixel point independently.
In view of the above problems, embodiments of the present invention provide a micro LED finished product and a method for manufacturing the micro LED finished product, which can perform dispensing on each micro LED in a micro LED array by an electrofluid spray printing device, so as to prepare an optical lens for each individual pixel point on the micro LED array, reduce light divergence, and thus improve front light extraction efficiency.
The specific steps of the method for preparing the miniature LED finished product and the obtained technical effects are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the present embodiment provides a method for manufacturing a micro LED110, including,
s100, preparing the micro LED array 100.
S200, using an electrofluid jet printing device to jet print the ink 210 on the prepared micro LED array 100, so that the ink 210 covers the micro LEDs 110 for preparing the optical lens 300.
And S300, further heating and curing the micro LED110 coated with the ink 210 to obtain a micro LED finished product 1000.
It can be understood that each micro LED110 in the micro LED array 100 is dispensed by an electric current jet printing device, which can make the ink droplet size of the ink jet less than 10 μm, so that each individual micro LED110 in the micro LED array 100 can prepare an optical lens, reduce the light divergence, and improve the light extraction rate of the front surface.
In detail, in this embodiment, after preparing the micro LED array 100, the step of using the current jet printing device to jet print the ink 210 on the micro LED array 100 includes preparing the ink 210 jet printed by the current jet printing device: the organic material for preparing the optical lens 300 is melted into the fluid ink 210, and then the ink 210 is added into the nozzle 200 of the electrofluid jet printing apparatus, so that the electrofluid jet printing apparatus added with the ink 210 performs jet printing on the micro LED110 in the micro LED array 100 with the ink 210.
Of course, in some other embodiments, the material for preparing the optical lens 300 may be dissolved in an organic material to prepare the ink 210, or the organic material fluid for preparing the optical lens 300 added with a curing agent may be used as the ink 210 for electro-fluid jet printing, or the ink 210 may be prepared in other manners, as long as the ink 210 is an organic fluid and can smoothly form the optical lens 300 after curing, which is not limited herein.
Specifically, the material of the optical lens 300 may be selected according to actual conditions and the required light transmission efficiency of the micro LED product 1000, for example, the material of the optical lens 300 is epoxy resin, polystyrene or silica gel, and of course, the optical lens 300 may also be made of other materials as long as the optical lens 300 can satisfy the light-emitting rate of the finally prepared micro LED product 1000, which is not specifically limited herein.
Further, before the electrofluid jet printing apparatus is used to jet print the ink 210 on the micro LED array 100, the step includes disposing an ink-repellent member on the micro LED array 100, specifically, the ink-repellent member is formed by connecting a plurality of ink-repellent grids, and at least one micro LED110 is located in the ink-repellent grid, it can be understood that when the micro LEDs 110 in the micro LED array 100 share one optical lens 300, since the electrofluid jet printing apparatus is used to jet print the ink 210, so that the ink 210 covers the plurality of micro LEDs 110 at the same time, the speed of preparing the optical lens 300 can be increased, and at this time, the micro LEDs 110 are located in the ink-repellent grid. Or when each micro LED110 has one optical lens 300, since the electrofluid spray printing apparatus makes the ink 210 cover only one micro LED110 when spraying the ink 210, there is only one micro LED110 in the ink-repellent grid. The anti-ink grid is used for preventing a plurality of adjacent inks 210 from interfering, preventing adjacent inks 210 from being fused to influence the optical lens 300 obtained by curing, and increasing the qualification rate of the prepared miniature LED finished product 1000.
It is understood that, in some embodiments, the order of the step of preparing the ink 210 and the step of disposing the ink-repellent member on the micro LED array 100 may be interchanged, and is not particularly limited as long as the micro LED110 can be successfully prepared by the method for preparing the micro LED product 1000.
Further, in the present embodiment, the step of adding the prepared ink 210 to the nozzle 200 of the electrofluid spray printing apparatus to prepare for printing, and then using the electrofluid spray printing apparatus to spray print the ink 210 and the micro LED array 100 includes, referring to fig. 2, aligning the nozzle 200 of the electrofluid spray printing apparatus with a whole micro LED110 in the micro LED array 100, and pressing the ink 210 onto the micro LED array 100, so that the ink 210 covers a single micro LED 110.
Specifically, in the process of performing inkjet printing on the micro LED array 100 by using the electro-fluid inkjet printing apparatus, the ink 210 applied with voltage by the electro-fluid inkjet printing apparatus is charged, and then the ink 210 is extruded out of the nozzle 200 of the electro-fluid inkjet printing apparatus under the action of the electric field by applying the electric field, so that the ink 210 is inkjet printed on the micro LED array 100, and before the inkjet printing, the size of the ink 210 can be smaller than 10 μm by adjusting the viscosity of the ink 210 and the intensity of the electric field, so that the ink 210 inkjet printed by the electro-fluid inkjet printing apparatus can just cover a single micro LED110, in other words, by adjusting the viscosity of the ink 210 and changing the intensity of the electric field, the size of the ink 210 inkjet printed by the electro-fluid inkjet printing apparatus can be controlled to only cover a single micro LED110, and cannot cover other micro LEDs 110 in the micro LED array 100, and the micro LED110 in the micro LED array 100 is inkjet printed by the electro-fluid inkjet printing apparatus, each micro LED110 can be jetted on the micro LED array 100, and then a separate optical lens 300 can be prepared on each micro LED110, so that the light divergence is reduced, and the front light extraction efficiency is improved.
After the step of coating the ink 210 on the single micro LED110 is completed, in this embodiment, referring to fig. 3, the step of spraying the ink 210 on the micro LED array 100 by using the electrofluid spray printing apparatus further includes moving the nozzle 200 of the electrofluid spray printing apparatus, aligning the nozzle 200 of the electrofluid spray printing apparatus with another micro LED110 in the micro LED array 100, and pressing the ink 210 onto the micro LED110 under the action of the electric field, and further repeating the above steps until all the micro LEDs 110 in the micro LED array 100 are coated with the ink 210.
Of course, in some embodiments, the inkjet head 200 of the electrofluidic apparatus is not limited to be moved, but the micro LED array 100 may also be moved, and the inkjet head 200 of the electrofluidic apparatus is aligned with another micro LED110 in the micro LED array 100, and the above steps are repeated until all micro LEDs 110 in the micro LED array 100 are coated with the ink 210 by pressing the ink 210 onto the micro LED110 under the action of the electric field.
Referring to fig. 4, the micro LED array 100 coated with the ink 210 is finally heated and cured to prepare the micro LED array 100 integrated as an optical lens to obtain a finished micro LED 1000.
The embodiment further includes a micro LED product 1000 prepared by the above method for preparing the micro LED 110.
In summary, in the method for manufacturing the micro LED110 provided by the embodiment, the electro-fluid jet printing device is used to coat the ink 210 on the micro LED110 in the micro LED array 100, so as to avoid that the ink 210 coated in the conventional method has a large size and cannot coat the ink 210 on each pixel point in the micro LED array 100, the ink 210 can be electrically charged by applying a voltage with the electro-fluid jet printing device, and the ink 210 can be extruded onto the micro LED110 by applying an electric field, and the viscosity of the ink 210 and the electric field intensity can be adjusted, and thus, the ink drop size is controlled to be less than 10 μm, the ink 210 is controlled to have a size just covering the individual micro LEDs 110, and the printing function can be realized by using the high-viscosity ink 210 through the electro-fluid jet printing equipment, so that the high-density optical lens is prepared on the micro LED array 100, the light divergence is reduced, and the micro LED finished product 1000 with high light extraction efficiency is prepared.
Second embodiment:
referring to fig. 5-6, in the second embodiment, the step of using the electrofluid jet printing apparatus to jet the ink 210 onto the micro LED array 100 is not limited to the step of the first embodiment, and the step may be further performed by aligning the nozzle 200 of the electrofluid jet printing apparatus with one micro LED110 in the micro LED array 100, pressing the ink 210 onto the single micro LED110, and simultaneously pressing the ink 210 by the nozzle 200, so that the ink 210 covers at least two micro LEDs 110 at the same time, it can be understood that the number of the micro LEDs 110 covered by the ink 210 at the same time can be controlled according to actual needs to improve the coating efficiency of the ink 210, and further improve the preparation efficiency of the optical lens 300.
Further, in the present embodiment, the nozzle 200 of the electrofluid spray printing apparatus is moved and aligned with the other micro LED110, which is not coated with the ink 210, in the micro LED array 100, or the micro LED array 100 is moved and the nozzle 200 is aligned with the other micro LED110, which is not coated with the ink 210, in the micro LED array 100, so as to coat the ink 210 on the micro LED110, so that the ink 210 covers at least two micro LEDs 110. Of course, in this embodiment, the step of moving the micro LED array 100 or the moving nozzle 200 may be arbitrarily replaced in the step of using the electrofluid jet printing apparatus to jet the ink 210 on the micro LED array 100, or only the moving nozzle 200 or only the moving micro LED array 100 may be used, which is not specifically limited herein, as long as the electrofluid jet printing apparatus can smoothly jet the ink on the micro LEDs 110 in the micro LED array 100.
In summary, the difference between the method for manufacturing the micro LED110 provided in the embodiment and the method for manufacturing the micro LED110 in the first embodiment is only that the ink 210 sprayed and printed on the nozzle 200 of the electrofluid spray printing apparatus coats at least two micro LEDs 110, and other steps are the same, so that this embodiment also has the beneficial effects obtained by the method for manufacturing the micro LED110 provided in the first embodiment, and details are not repeated herein. Compared with the method for manufacturing the micro LED110 provided by the first embodiment, the method provided by the present embodiment has higher efficiency.
Referring to fig. 7, the present embodiment further includes a micro LED product 1000 manufactured by the above manufacturing method of the micro LED 110.
Therefore, the micro LEDs 110 in the micro LED product 1000 provided by the present embodiment are all provided with the optical lens 300, so that the light divergence rate thereof is relatively low, and thus the micro LED product 1000 has high light emitting efficiency.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A preparation method of a miniature LED finished product is characterized by comprising the following steps:
preparing a micro LED array;
using electrofluid spray printing equipment to spray and print ink on the micro LED array, so that the ink covers the micro LED and is used for preparing an optical lens;
and heating and curing the micro LED coated with the ink to obtain a micro LED finished product.
2. The method for preparing a micro LED product according to claim 1, wherein the step of inkjet printing ink on the micro LED array by using an electrofluid inkjet printing apparatus comprises:
and a spray head of the electrofluid spray printing equipment is aligned with one miniature LED in the miniature LED array, and the ink is extruded onto the miniature LED array to cover the single miniature LED.
3. The method of claim 2, wherein the step of printing ink on the micro LED array using an electrofluid printing apparatus further comprises:
moving the nozzle and aligning to another micro LED in the micro LED array, extruding the ink to the micro LED, and repeating the above steps until all the micro LEDs in the micro LED array are coated with the ink.
4. The method of claim 2, wherein the step of printing ink on the micro LED array using an electrofluid printing apparatus further comprises:
and moving the micro LED array, aligning the nozzle with another micro LED in the micro LED array, pressing the ink to the micro LED, and repeating the steps until all the micro LEDs in the micro LED array are coated with the ink.
5. The method for preparing a micro LED product according to claim 1, wherein the step of inkjet printing ink on the micro LED array by using an electrofluid inkjet printing apparatus comprises:
the nozzle of the electrofluid spray printing device is aligned with one micro LED in the micro LED array, the ink is extruded to the single micro LED, and meanwhile, the nozzle continuously extrudes the ink, so that the ink covers at least two micro LEDs simultaneously.
6. The method for manufacturing a micro LED product according to claim 5, wherein the step of inkjet printing ink on the micro LED array by using an electrofluid inkjet printing apparatus further comprises:
moving the nozzle and aligning another micro LED in the micro LED array which is not coated with the ink, and/or;
moving the micro LED array and aligning the nozzle with another micro LED which is not coated with ink in the micro LED array;
such that all of the micro LEDs in the array of micro LEDs are coated with the ink.
7. The method for preparing a micro LED product according to claim 1, wherein the step of using an electrofluid jet printing device to jet print ink on the micro LED array comprises:
set up on the miniature LED array and prevent black piece, prevent that black piece is formed by connecting a plurality of anti-ink grids, at least one miniature LED is located in the anti-ink grid, the anti-ink grid is used for preventing a plurality of adjacent the ink takes place to interfere.
8. The method for preparing a micro LED product according to claim 1, wherein the step of using an electrofluid jet printing device to jet print ink on the micro LED array comprises:
preparing the ink: melting the ink in a fluid form from the organic material from which the optical lens is made, or;
dissolving a material for preparing the optical lens in an organic solvent, or;
and taking the organic material fluid added with the curing agent for preparing the optical lens as the ink.
9. The method for preparing a finished miniature LED product according to claim 1, wherein the method comprises the following steps:
the optical lens is made of epoxy resin, polystyrene or silica gel.
10. A micro LED product, characterized by being prepared by the method of any one of claims 1 to 9.
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| 王运赣: "《液态金属3D打印技术 原理及应用》", 上海科学技术出版社, pages: 148 - 150 * |
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