A CSP product front-side test fixture

Abstract

This utility model relates to the field of testing tool technology, and in particular to a front-side testing fixture for CSP products. It includes a housing and a back cover fixed to the bottom of the housing. A testing component for illuminating CSP LEDs is fixed to the housing, and a panel is fixed to the surface of the testing component by screws. The testing component includes a circuit board fixed to the housing. A sheet-like positive and negative electrode is fixed at the center of the circuit board surface. An air tube adapter is connected to the bottom of the circuit board, and an adsorption hole communicating with the air tube adapter is opened at the center of the circuit board. This front-side testing fixture for CSP products uses vacuum adsorption to fix the small and lightweight CSP LEDs, solving the problem of LED displacement caused by the lack of external force in traditional testing fixtures. This ensures that the CSP LEDs remain stable during testing, with precise and reliable contact with the positive and negative electrodes, and can efficiently complete the lighting test of the CSP LEDs.

Description

Technical Field

[0001] This utility model relates to the field of testing tool technology, specifically a front testing fixture for CSP products. Background Technology

[0002] In the field of CSP product testing, existing technologies mainly utilize conventional LED series test fixtures. However, CSP products are characterized by their small size, light weight, and small distance between the P and N poles, making conventional test fixtures insufficient to meet testing requirements. Furthermore, due to the light weight of the CSP LEDs themselves, they are difficult to stably contact the positive and negative poles of the fixture without external force for fixation. During testing, the LEDs are prone to displacement, leading to poor contact and unreliable testing. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a front-side testing fixture for CSP products, which solves the technical problems of conventional fixtures being unable to handle CSP LED testing and being prone to poor contact during testing.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a CSP product front test fixture, including a housing and a back cover fixed to the bottom of the housing, wherein a test component for lighting CSP LED beads is fixed on the housing, and a panel is fixed to the surface of the test component by screws;

[0005] The test assembly includes a circuit board fixed to the outer shell, with a positive and negative electrode in sheet-like structure fixed at the center of the circuit board surface, a tracheal adapter connected to the bottom of the circuit board, and an adsorption hole communicating with the tracheal adapter at the center of the circuit board.

[0006] Preferably, a through hole is provided at the center of the panel, and clearance grooves are provided on both sides of the through hole.

[0007] Preferably, protruding positioning barriers are fixed at the edges of both the positive and negative electrode surfaces.

[0008] Preferably, a sealing gasket is provided between the positive and negative electrodes and attached to the circuit board. The sealing gasket has an adsorption hole two corresponding to the position of the adsorption hole one, and the thickness of the sealing gasket is the same as the thickness of the positive and negative electrodes.

[0009] Preferably, the distance between the positive and negative electrodes is 0.15mm-0.2mm, and they are symmetrically distributed on both sides of the sealing gasket.

[0010] Preferably, the positive and negative terminals are connected to two sets of power leads via pins, and the bottom of the air tube adapter is connected to a vacuum tube. Both the power leads and the vacuum tube pass through the rear cover and extend to the outside.

[0011] By employing the above technical solution, this utility model provides a front-side testing fixture for CSP products, which has at least the following beneficial effects:

[0012] 1. The front test fixture of this CSP product fixes the tiny and lightweight CSP LED beads through vacuum adsorption, which solves the problem of LED bead displacement caused by the lack of external force fixation in traditional test fixtures. This ensures that the CSP LED beads remain stable during the test and make accurate and reliable contact with the positive and negative electrodes, and can efficiently complete the lighting test of CSP LED beads.

[0013] 2. The front test fixture of this CSP product can fill the gap between the electrode plates by setting a sealing gasket between the positive and negative electrodes, so that the bottom of the CSP lamp bead can be completely attached to the sealing gasket. This can reduce air leakage and improve the adsorption effect of the CSP lamp bead. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0015] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0016] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the panel of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the test component of this utility model;

[0019] Figure 5 This is a schematic diagram of the internal air pipe adapter and power cord of the present invention.

[0020] Figure 6 This is a schematic diagram of the internal structure of the outer shell of this utility model.

[0021] Figure label:

[0022] 1. Outer shell; 2. Back cover; 3. Test assembly; 31. Circuit board; 312. Adsorption hole one; 32. Pins; 33. Positive and negative electrodes; 34. Positioning enclosure; 35. Sealing gasket; 351. Adsorption hole two; 36. Air hose adapter; 37. Vacuum air hose; 38. Power cord; 4. CSP LED bead; 5. Panel; 51. Through hole; 52. Clearance groove; 6. Screws. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] CSP LED chips are chip-level packaged LED light sources, a new technology that directly packages LED chips onto a substrate. This eliminates the need for traditional gold wires or connectors, achieving chip-level miniaturization. The package size is close to that of the chip itself. This design greatly enhances the potential for thinner and lighter lamps, making them particularly suitable for space-constrained applications such as mobile phone flashlights and car dashboards.

[0025] Due to the technical defects of existing technologies, such as the susceptibility to poor contact during testing, please refer to... Figures 1-6 This embodiment provides a CSP product front-side test fixture that uses vacuum adsorption to fix the small and lightweight CSP LED beads 4, solving the problem of LED bead displacement caused by the lack of external force fixation in traditional test fixtures. The fixture includes a housing 1 and a back cover 2 fixed to the bottom of the housing 1. A test component 3 for lighting the CSP LED beads 4 is fixed on the housing 1. A panel 5 is fixed to the surface of the test component 3 by screws 6. In use, the CSP LED beads 4 are placed on the test component 3, and then the CSP LED beads 4 are powered on for lighting test. The panel 5 is provided to protect the test component 3 and prevent damage to the test component 3.

[0026] Existing fixtures lack an integrated vacuum adsorption structure, or the adsorption structure is separate from the conductive components, resulting in the inability to simultaneously achieve CSP lamp bead fixation and electrical contact. This leads to low testing efficiency and poor stability. For a solution to this problem, please refer to [reference needed]. Figure 4 The test component 3 includes a circuit board 31 fixed to the outer shell 1. A sheet-like positive and negative electrode 33 is fixed at the center of the surface of the circuit board 31. An air tube adapter 36 is connected to the bottom of the circuit board 31. An adsorption hole 312 communicating with the air tube adapter 36 is opened at the center of the circuit board 31. The adsorption hole 312 at the center of the circuit board 31 is connected to the air tube adapter 36 to realize the precise transmission of vacuum adsorption force. This ensures that while the CSP lamp bead 4 is fixed, the sheet-like positive and negative electrode 33 directly contacts the electrode of the CSP lamp bead 4, solving the problem that the fixing of the CSP lamp bead 4 and the electrical contact cannot be achieved simultaneously.

[0027] Because the CSP LED bead 4 is small in size, it requires the use of tweezers to handle it. However, the opening of the conventional fixture panel 5 is small, and it is difficult to operate the tweezers when placing the LED bead due to insufficient space, which affects the testing efficiency. To address this issue, a through hole 51 is provided in the center of the panel 5, and clearance grooves 52 are provided on both sides of the through hole 51. The clearance grooves 52 are designed to accommodate the tweezers head, thereby facilitating the handling of the CSP LED bead 4.

[0028] The CSP LED bead 4 is lightweight and prone to sliding and misalignment during placement. To address this issue, protruding positioning barriers 34 are fixed at the edges of the positive and negative electrode surfaces 33. The positioning barriers 34 limit the movement of the positive and negative electrode surfaces 33, thus positioning the CSP LED bead 4 and preventing it from shifting and affecting the test.

[0029] Because there is a gap between the positive and negative electrodes 33, they cannot be completely adhered to the CSP lamp bead 4 during vacuum adsorption, thus affecting the adsorption and fixation effect. To address this issue, a sealing gasket 35 is provided between the positive and negative electrodes 33 and attached to the circuit board 31. The sealing gasket 35 has an adsorption hole 351 corresponding to the position of the first adsorption hole 312, and the thickness of the sealing gasket 35 is the same as the thickness of the positive and negative electrodes 33. By providing a sealing gasket 35 between the positive and negative electrodes 33, the gap between the electrode sheets can be filled, allowing the bottom of the CSP lamp bead 4 to be completely adhered to the sealing gasket 35. This reduces air leakage and improves the adsorption effect of the CSP lamp bead 4.

[0030] The distance between the P and N electrodes of the CSP LED bead 4 is small, while the distance between the positive and negative electrodes 33 of conventional LED fixtures is large, which cannot meet the conductivity requirements of the small electrode spacing. To address this issue, the distance between the positive and negative electrodes 33 is 0.15mm-0.2mm, and they are symmetrically distributed on both sides of the sealing gasket 35. This directly matches the electrode spacing of the CSP LED bead 4, ensuring reliable contact between the positive and negative electrodes 33 and the LED bead electrodes.

[0031] Furthermore, the positive and negative electrodes 33 are connected to two sets of power wires 38 via pins 32, and the bottom of the air tube adapter 36 is connected to a vacuum tube 37. Both the power wires 38 and the vacuum tube 37 pass through the rear cover 2 and extend to the outside. The power wires 38 facilitate power supply to the positive and negative electrodes 33 for power-on lighting tests, while the vacuum tube 37 facilitates connection to an external vacuum pump to form a vacuum adsorption and fixation effect.

[0032] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CSP product front side test fixture, comprising a housing (1) and a back cover (2) fixed to the bottom of the housing (1), characterized in that: The outer casing (1) is fixed with a test component (3) for lighting up the CSP lamp beads (4), and the surface of the test component (3) is fixed with a panel (5) by screws (6). The test component (3) includes a circuit board (31) fixed on the outer shell (1). A positive and negative electrode (33) in a sheet-like structure is fixed at the center of the surface of the circuit board (31). A tracheal adapter (36) is connected to the bottom of the circuit board (31). An adsorption hole (312) communicating with the tracheal adapter (36) is opened at the center of the circuit board (31).

2. The CSP product front side test fixture of claim 1, wherein: A through hole (51) is provided at the center of the panel (5), and clearance grooves (52) are provided on both sides of the through hole (51).

3. The CSP product front side test fixture of claim 1, wherein: Both the positive and negative electrodes (33) have protruding positioning barriers (34) fixed at the edges of their surfaces.

4. The CSP product frontside test fixture of claim 1, wherein: A sealing gasket (35) is provided between the positive and negative electrodes (33) and attached to the circuit board (31). The sealing gasket (35) has an adsorption hole (351) corresponding to the position of the adsorption hole (312), and the thickness of the sealing gasket (35) is the same as the thickness of the positive and negative electrodes (33).

5. The CSP product front side test fixture of claim 4, wherein: The distance between the positive and negative electrodes (33) is 0.15mm-0.2mm, and they are symmetrically distributed on both sides of the sealing gasket (35).

6. The CSP product frontside test fixture of claim 1, wherein: The positive and negative terminals (33) are connected to two sets of power wires (38) through pins (32). The bottom of the air tube adapter (36) is connected to a vacuum tube (37). The power wires (38) and the vacuum tube (37) both pass through the back cover (2) and extend to the outside.

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