A flow field pool for magneto hydrodynamic mass transfer

Abstract

The utility model provides a kind of flow field pool for flux transfer, belong to chip mass transfer technical field, including flow field groove, the upper part of one end of flow field groove is provided with flow field tower, the lower part of another end of flow field groove is provided with flow field pool, slope is provided between flow field groove and flow field tower, filter screen is provided between flow field groove and flow field pool, flow field groove surface is provided with fluid, chip is provided between fluid, RGB board is provided in the middle of flow field groove, and fluid is located above RGB board.The utility model uses above-mentioned one kind of flow field pool for flux transfer, solve the chip transfer efficiency low in prior art, recovery difficult and the problems such as poor flow field uniformity.

Description

Technical Field

[0001] This utility model relates to the field of chip mass transfer technology, and in particular to a flow field pool for magnetic mass transfer. Background Technology

[0002] Micro LED (micron-scale light-emitting diode) is considered a core direction for next-generation display technology. Its key advantages include self-emission, high brightness, high contrast, ultra-long lifespan, and extreme miniaturization. These characteristics give Micro LED enormous potential in the field of ultra-high-resolution displays. However, the bottleneck in mass production lies in the mass transfer process, which requires the precise transfer of a large number of Micro LED chips from the growth substrate to the TFT driving backplane with extremely high yield. Mass transfer is a core process in semiconductors and Micro LED displays, but current industry solutions still have many shortcomings.

[0003] Traditional mechanical transfer methods can only transfer a small number of chips at a time, which is insufficient to meet the needs of large-scale production, resulting in slow processing progress and high costs. In recent years, magnetic flux mass transfer technology has emerged as an new transfer method, which can transfer a large number of chips at a time, significantly improving production efficiency. The utility model patent "CN118867069A A Trapezoidal LED Chip Fixed Magnetic Falling Magnetic Self-Assembly Mechanism and Method" includes a flow chamber for storing fluid and providing a flow environment, a magnetically controlled falling part, and a transfer substrate. The flow chamber has ports for fluid inlet and outlet at both ends. The magnetically controlled falling part is located above the middle of the flow chamber and is connected to the flow chamber. A mounting groove is provided on the bottom surface of the middle of the flow chamber. The transfer substrate is adapted to the mounting groove and is positioned opposite to the magnetically controlled falling part. However, the chips cannot be recycled after transfer, resulting in relatively low cost. Invention patent "CN117334797B A Mass Transfer Device and Transfer Method for Magnetic Self-Assembly" utilizes the combined action of flow field and magnetic field to rapidly transfer semiconductor light-emitting chips, effectively improving transfer efficiency and accuracy. However, during the transfer process, the fluid is not controlled by external mechanisms, resulting in a low flow rate and affecting production speed. Invention patent "CN119479498A Lamp Board and Display Device" includes a vibration unit and a driving mechanism. Vibration of the vibration unit positions and fixes the light-emitting unit to the vibration unit, achieving mass transfer installation and solving the technical problem of significant damage to light-emitting chips in existing mass transfer operations. This solution controls the overall flow rate of the flow field by adjusting the water pump; however, it cannot individually control the flow rate of each channel during the transfer process, easily leading to uneven flow rate and affecting the mass transfer effect.

[0004] To address the aforementioned issues, this invention provides a flow field pool for mass transfer of magnetic flux, aiming to solve problems such as low chip transfer efficiency, difficulty in recycling, and poor flow field uniformity in the prior art by optimizing the flow field structure design and fluid control methods, thereby improving the mass transfer efficiency and yield of Micro LED chips. Utility Model Content

[0005] The purpose of this invention is to provide a flow field pool for mass transfer of magnetic flux, which solves the problems of low chip transfer efficiency, difficulty in recycling, and poor flow field uniformity in the prior art.

[0006] To achieve the above objectives, this utility model provides a flow field pool for mass transfer of magnetic flux, including a flow field tank, a flow field tower disposed above one end of the flow field tank, a flow field pool disposed below the other end of the flow field tank, a ramp disposed between the flow field tank and the flow field tower, a filter screen disposed between the flow field tank and the flow field pool, a fluid disposed on the surface of the flow field tank, a chip disposed between the fluid, an RGB board disposed in the middle of the flow field tank, and the fluid located above the RGB board.

[0007] Preferably, a water supply pipe is provided at one end of the flow field tower, a water pump is provided at one end of the water supply pipe, and a water pumping pipe is provided at one end of the flow field pool. The water pumping pipe is connected to the water supply pipe through the water pump.

[0008] Preferably, the flow field tower is a rounded cuboid with openings on the front and top, and a valve is provided on the front of the flow field tower.

[0009] Preferably, the ramp is a sloping cube, and the inclination angle of the ramp is 25°-30°.

[0010] Preferably, the flow field pool is a rounded cuboid, and a filter screen is provided at the top opening of the flow field pool.

[0011] Preferably, the RGB board is a detachable single-color board and a three-color board.

[0012] Preferably, the power of the water pump is 50-100W, and the flow rate of the water pump is 500-1000L / H.

[0013] Preferably, the flow field tower, ramp, flow field channel, and flow field pool are all made of one or more non-magnetic materials.

[0014] Preferably, the fluid is one or more of hexafluoropropylene trimer, anhydrous ethanol, and perfluorocarbons.

[0015] Therefore, the present invention employs the above-mentioned flow field pool for mass transfer of magnetic flux, and the technical effects are as follows:

[0016] 1. Improved efficiency in mass transfer: Through the synergistic effect of flow field tower, ramp, flow field groove and adapted permanent magnet needle array, a large number of chips can be transferred quickly, which significantly improves the transfer efficiency compared with traditional robotic arms.

[0017] 2. Improve transfer accuracy and yield: The flow field groove integrates a permanent magnet needle array and an RGB optical positioning plate. The needle array corresponds spatially with the positioning hole, realizing precise chip positioning and improving transfer accuracy.

[0018] 3. Recyclable chips reduce costs: A single-layer steel filter screen is installed at the inlet of the flow field pool, which can filter and recycle chips and magnetic powder that have not fallen into the small holes of the RGB board, making it convenient for chips to be reused and reducing production costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the flow field tower structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the slope structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the flow field groove structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the flow field pool structure of this utility model.

[0024] Figure Labels

[0025] 1. Flow field tower; 2. Slope; 3. Flow field tank; 4. Flow field pool; 5. Filter screen; 6. Fluid; 7. Pumping pipe; 8. Water pump; 9. Water delivery pipe; 10. Valve; 11. Chip; 12. RGB board. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0028] Example 1

[0029] like Figure 1As shown, this utility model provides a flow field pool 4 for mass transfer of magnetic flux, which consists of a flow field tank 3, a flow field tower 1, a flow field pool 4, and a ramp 2. The flow field tank 3 is placed horizontally, with the flow field tower 1 above one end and the flow field pool 4 below the other end. A ramp 2 is provided between the flow field tank 3 and the flow field tower 1, and a filter screen 5 is provided between the flow field tank 3 and the flow field pool 4.

[0030] like Figure 2 As shown, the flow field tower 1 is a rounded cuboid with a length of 320 mm, a width of 60 mm, and a height of 90 mm. It has openings on the front and top, with a valve 10 on the front for controlling the flow of fluid 6 and chip 11. One end of the flow field tower 1 is connected to a water supply pipe 9, and the other end of the water supply pipe 9 is connected to a water pump 8 for pumping fluid 6 from the flow field pool 4 to the flow field tower 1.

[0031] like Figure 3 As shown, ramp 2 is a sloping cube with a length of 300 mm, a width of 50 mm, a height of 15 mm, and an inclination angle of 25°-30°. Its slope is smooth enough to increase the downward flow velocity of fluid 6 and adjust the motion posture of chip 11.

[0032] like Figure 4 As shown, the flow channel 3 is 535mm long, 380mm wide, and 45mm high, and is made of non-magnetic material to prevent the chip 11 from adhering to the surface. The surface of the flow channel 3 is sufficiently smooth. An RGB plate 12 is set in the middle of the flow channel 3. The RGB plate 12 is a detachable single-color plate and a three-color plate for precise positioning of the chip 11. The fluid 6 is located on the surface of the flow channel 3, and the chip 11 is placed between the fluids. The fluid 6 is located above the RGB plate 12 and carries the chip 11 as it flows.

[0033] like Figure 5 As shown, the flow field pool 4 is a rounded cuboid with a length of 340mm, a width of 80mm, and a height of 100mm. A filter screen 5 is installed at its top opening to filter and recover chips 11 and magnetic powder that have not fallen into the small holes of the RGB board 12. A water pump pipe 7 is installed at one end of the flow field pool 4, which is connected to a water supply pipe 9 via a water pump 8, forming a circulation system for the fluid 6. The water pump 8 has a power of 50-100W and a flow rate of 500-1000L / H, and is used to control the flow rate and circulation of the fluid 6.

[0034] Fluid 6 is one or more of hexafluoropropylene trimer, anhydrous ethanol, and perfluorocarbons, requiring non-conductivity, low density, low molecular forces, and chemical inertness to allow chip 11 to sink naturally in fluid 6. The flow field tower 1, ramp 2, flow field tank 3, and flow field pool 4 are all made of one or more non-magnetic materials such as stainless steel, aluminum alloy, copper alloy, and ceramics, ensuring no interference with the magnetism of the associated magnetic needle.

[0035] During operation, the flow field tower 1 stores fluid 6 and magnetic chips 11. Once a certain liquid level is reached, valve 10 opens, and fluid 6, carrying chips 11, flows through ramp 2 into flow field tank 3. In flow field tank 3, as it passes the RGB plate 12, the magnetic needles below attract the magnetic chips 11, causing them to fall into small holes. Chips 11 that do not fall into the holes flow into flow field pool 4. A filter 5 at the inlet of flow field pool 4 filters and recovers the chips 11 and magnetic powder. After entering flow field pool 4, fluid 6 is pumped by pump 8 through a pumping pipe 7 back to flow field tower 1, where it is used again to transfer chips 11 until the RGB plate 12 is full of chips 11.

[0036] Therefore, this utility model adopts the above-mentioned flow field pool for mass transfer of magnetic flux, and through innovative flow field structure design, optimized fluid control method, chip recycling mechanism, high-precision positioning technology, modular design and use of non-magnetic materials, it achieves efficient, accurate and low-cost mass transfer of chips, providing an efficient solution for precision manufacturing fields such as Micro LED and semiconductor packaging.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A flow field pool for mass transfer of hydromagnetic flux, characterized in that, The device includes a flow field tank, a flow field tower is provided above one end of the flow field tank, a flow field pool is provided below the other end of the flow field tank, a ramp is provided between the flow field tank and the flow field tower, a filter screen is provided between the flow field tank and the flow field pool, fluid is provided on the surface of the flow field tank, a chip is provided between the fluid, an RGB board is provided in the middle of the flow field tank, and the fluid is located above the RGB board.

2. The flow field pool for mass transfer of magnetic flux according to claim 1, characterized in that, A water supply pipe is provided at one end of the flow field tower, and a water pump is provided at one end of the water supply pipe. A water pumping pipe is provided at one end of the flow field pool, and the water pumping pipe is connected to the water supply pipe through the water pump.

3. The flow field pool for mass transfer of hydromagnetic flux according to claim 1, characterized in that, The flow field tower is a rounded cuboid with openings on the front and top, and a valve is provided on the front of the flow field tower.

4. The flow field pool for mass transfer of hydromagnetic flux according to claim 1, characterized in that, The ramp is a sloping cube with an inclination angle of 25°-30°.

5. A flow field pool for mass transfer of hydromagnetic flux according to claim 1, characterized in that, The flow field pool is a rounded cuboid, and a filter screen is installed at the opening at the top of the flow field pool.

6. The flow field pool for mass transfer of hydromagnetic flux according to claim 1, characterized in that, The RGB board is a detachable single-color board and a three-color board.

7. A flow field pool for mass transfer of hydromagnetic flux according to claim 2, characterized in that, The power of the water pump is 50-100W, and the flow rate of the water pump is 500-1000L / H.

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