Tiny-spacing ABF carrier plate test fixture

Abstract

The utility model belongs to the related technical field of test of semiconductor packaging substrates, and particularly relates to a micro-spacing ABF carrier plate test fixture. Comprising a shell, a placement table, a first supporting frame, a second supporting frame, a supporting guide assembly, an electric cylinder, a plurality of pressing and limiting assemblies, an auxiliary discharging assembly, two transmission assemblies, a U-shaped plate, a first motor, an adjusting assembly, two mounting bases and two testing needles. Rectangular openings are formed in the front side and the rear side of the shell, the containing table, the first supporting frame and the second supporting frame are all arranged in the shell and are sequentially arranged from bottom to top, and the supporting guide assembly is arranged in the shell and connected with the containing table, the first supporting frame and the second supporting frame. The device is reasonable in design, is compact in structure, is simple and convenient to operate, is precise in positioning, is convenient to maintain, can achieve the quick and accurate testing of the tiny-spacing ABF support plate, and effectively improves the testing efficiency and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field related to testing of semiconductor package substrates, and in particular to a small-pitch ABF carrier board testing fixture. Background Art

[0002] With the development of the electronics industry, the demand for high-density, high-precision circuit board testing is increasing. As one of the important types of circuit boards, the design and manufacture of test fixtures for ABF (Ajinomoto Build-up Film) substrates have become particularly important.

[0003] For example, the "A small-pitch ABF carrier board test fixture" with the existing authorized announcement number CN 221303491 U has a base, a first electric slide, a first electric slider, a second electric slide, a second electric slider, an electric lifting rod, a probe, a test board and a test hole. Through the setting of multiple test holes on the test board, the minimum spacing between two test holes can reach 7um, which is very good at controlling the spacing between the two test holes, increasing the PASS range and reducing the false detection rate. The small-pitch design can accurately perform ABF carrier board testing, and the probe can slide through the second electric slide and the second electric slider, so that the ABF carrier board can be moved accurately for testing. This setting has higher accuracy, and the test panel hole accuracy can be controlled within 3um.

[0004] However, the above-mentioned existing authorized patent still has at least the following deficiencies. First, it is necessary to manually rotate multiple bolts to fix the ABF carrier when placing and fixing it. At the same time, it is also necessary to manually disassemble and remove the ABF carrier from the placement slot after the test is completed. The operation is somewhat cumbersome, which is not conducive to improving the efficiency of ABF carrier testing. In addition, it is necessary to set up multiple electric slide rails and multiple electric sliders to cooperate with each other to achieve control, which makes its manufacturing cost relatively high and is not conducive to popularization and use.

[0005] Therefore, developing a fixture that can adapt to the testing of fine-pitch ABF substrates, improve test efficiency and accuracy, and reduce operating difficulty and maintenance costs is an urgent problem to be solved in the current technical field.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0007] The purpose of the present invention is to solve the shortcomings mentioned in the above background technology and to propose a fine pitch ABF carrier board testing fixture.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions: A fine-pitch ABF carrier test fixture, comprising a housing, a placement table, a first support frame, a second support frame, a support guide assembly, an electric cylinder, multiple pressure-holding limit assemblies, an auxiliary unloading assembly, two transmission assemblies, a U-shaped plate, a first motor, an adjustment assembly, two mounting seats, and two test pins;

[0009] The front and rear sides of the shell are provided with rectangular openings, and the placement table, support frame one and support frame two are all arranged in the shell and arranged in sequence from bottom to top, the support guide assembly is arranged in the shell and is connected to the placement table, support frame one and support frame two, the two transmission assemblies are arranged on the support guide assembly and are symmetrically arranged based on the placement table, the electric cylinder is fixedly mounted on the bottom inner wall of the shell, and the working end of the electric cylinder is fixedly connected to the bottom side of the placement table, the auxiliary unloading assembly is arranged on the bottom inner wall of the shell, the placement table is provided with a placement groove and a circular opening, and the auxiliary unloading assembly is adapted to the circular opening, a mounting plate is fixedly installed in the support frame two, the motor one is fixedly mounted on the mounting plate, the U-shaped plate is radially fixedly mounted on the output shaft of the motor one and is located below the mounting plate, the two mounting seats are slidably mounted on the U-shaped plate, the adjustment assembly is arranged on the U-shaped plate and connected to the two mounting seats, the two test pins are respectively fixedly mounted on the bottom sides of the corresponding mounting seats, and a plurality of pressure-holding limit assemblies are arranged on the bottom side of the support frame one and adapted to the placement groove.

[0010] Preferably, the support and guide assembly includes two upper support plates, two middle support plates, two lower support plates and multiple guide columns. Multiple guide columns are vertically fixedly installed on the top inner wall and the bottom inner wall of the shell. The lower support plates, middle support plates and upper support plates are fixedly installed on both sides of the placement table, both sides of the support frame one and both sides of the support frame two, respectively. The two upper support plates, two middle support plates and two lower support plates are slidably connected to the corresponding multiple guide columns respectively.

[0011] Preferably, the pressure-holding limit assembly includes an upper sleeve, a guide ring, a lower sleeve and a spring. Multiple upper sleeves are fixedly installed on the bottom side of the support frame. A guide ring is fixedly installed on the bottom end of the upper sleeve. The same lower sleeve is slidably installed on the outer side of the guide ring and the upper sleeve. The same spring is fixedly installed on the bottom inner wall of the lower sleeve and the top inner wall of the upper sleeve.

[0012] Preferably, a rubber pad is fixedly mounted on the bottom end of the lower sleeve.

[0013] Preferably, the transmission assembly includes gear 1, gear 2, tooth plate 2 and two tooth plates 1. Tooth plate 1 is fixedly installed on the side of the lower support plate and the middle support plate close to each other. Two rotating shafts are rotatably installed on the front and rear inner walls of the shell. Gear 1 and gear 2 are fixedly sleeved on the rotating shaft. The two tooth plates 1 are both engaged with gear 1. Tooth plate 2 is fixedly installed on the bottom side of the upper support plate, and tooth plate 2 is engaged with gear 2.

[0014] Preferably, the diameter of gear one is greater than the diameter of gear two.

[0015] Preferably, the adjustment assembly includes a bidirectional screw and motor 2, motor 2 is fixedly mounted on one side of the U-shaped plate, a bidirectional screw is rotatably mounted on the U-shaped plate, both mounting seats are threadedly connected to the bidirectional screw, and one end of the bidirectional screw is axially fixedly connected to the output shaft of motor 2.

[0016] Preferably, two guide rods arranged parallel to the bidirectional screw rod are fixedly mounted on the U-shaped plate, and the two mounting seats are both slidably connected to the two guide rods.

[0017] Preferably, the auxiliary unloading assembly includes a support plate and a support column, the support column is fixedly mounted on the bottom inner wall of the shell, the top of the support column is fixedly mounted with a support plate, and the support plate is adapted to the circular opening.

[0018] Preferably, both the motor 1 and the motor 2 are servo motors.

[0019] The beneficial effects of the utility model are:

[0020] 1. Through the rational design of the structure, the precise testing of the ABF substrate with small pitch is achieved, which improves the accuracy and efficiency of the test.

[0021] 2. The use of servo motor as the power source ensures the stability and repeatability of the test process and reduces the test deviation caused by mechanical errors.

[0022] 3. By adjusting the settings of the components, the position of the test needle can be flexibly adjusted to meet the testing requirements of ABF carrier boards of different sizes and specifications.

[0023] 4. Through the mutual cooperation between the transmission component, the guide component and the pressure limit component, it is possible to achieve the mutual cooperation between the placement table, support frame 1 and support frame 2 during the working process by using only one electric cylinder. There is no need to set up additional electrical actuators to control the lifting and lowering of the placement table, support frame 1 and support frame 2, which greatly reduces costs.

[0024] 5. The design of auxiliary unloading components simplifies the unloading process, reduces the labor intensity of operators and improves production efficiency.

[0025] 6. The overall design takes into account the convenience and safety of operation, making the fixture more user-friendly during use and easy to maintain and service. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of a small-pitch ABF carrier board test fixture proposed by the present invention;

[0028] Figure 2 This is a schematic cross-sectional view of a small-pitch ABF carrier board test fixture proposed in the present invention;

[0029] Figure 3 This is a partial three-dimensional structural diagram of a small-pitch ABF carrier board test fixture proposed by the present invention;

[0030] Figure 4 This is a schematic structural diagram of the upper support plate, middle support plate, lower support plate, guide column and transmission assembly in a micro-pitch ABF carrier test fixture proposed in the present invention;

[0031] Figure 5 for Figure 2 Schematic diagram of the structure of part A;

[0032] Figure 6 This is a partial structural diagram of the U-shaped plate, adjustment assembly, mounting seat and test needle part proposed in the utility model.

[0033] In the figure: 1. Shell; 2. Placement table; 21. Lower support plate; 22. Electric cylinder; 23. Support column; 24. Support plate; 3. Support frame 1; 31. Middle support plate; 32. Press-holding limit assembly; 321. Upper sleeve; 322. Guide ring; 323. Lower sleeve; 324. Spring; 325. Rubber pad; 4. Support frame 2; 41. Upper support plate; 42. Mounting plate; 43. U-shaped plate; 431. Motor 1; 44. Mounting seat; 441. Bidirectional screw; 442. Motor 2; 45. Test pin; 5. Guide column; 6. Gear 1; 61. Tooth plate 1; 62. Gear 2; 63. Tooth plate 2. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0035] Reference Figure 1-6 , a small-pitch ABF carrier test fixture, including a shell 1, a placement table 2, a support frame 3, a support frame 4, an electric cylinder 22, a U-shaped plate 43, a motor 431, two mounting seats 44 and two test pins 45, the front and back sides of the shell 1 are opened with rectangular openings, the placement table 2, the support frame 3 and the support frame 4 are all arranged in the shell 1 and arranged in sequence from bottom to top, a plurality of guide columns 5 are vertically fixedly installed on the top inner wall and the bottom inner wall of the shell 1, and a lower support plate 21, a middle support plate 31 and an upper support plate 41 are fixedly installed on both sides of the placement table 2, the support frame 3 and the support frame 4 respectively, the two upper support plates 41, the two middle support plates 31 and the two lower support plates 21 are respectively slidably connected with the corresponding multiple guide columns 5, which can ensure that the support frame 4, the support frame 3 and the placement table 2 maintain stable movement and work in the shell 1;

[0036] The lower support plate 21 and the middle support plate 31 are fixedly installed with a gear plate 61 on the side close to each other, and two rotating shafts are rotatably installed on the front and rear inner walls of the shell 1, and a gear 6 and a gear 2 62 are fixedly sleeved on the rotating shaft. The two gear plates 61 are meshed with the gear 1 6, and the bottom side of the upper support plate 41 is fixedly installed with a gear plate 2 63, which meshes with the gear 2 62, and can control the support frame 1 3 and the support frame 2 4 to move up and down while the placement table 2 moves up and down. In order to make the movement stroke of the support frame 2 4 greater than the movement stroke of the placement table 2 and the support frame 1 3 when the placement table 2 is lifted and lowered, so that the test needle 45 can be controlled to move up and down without losing contact with the ABF carrier plate and maintaining the pressure limit, the diameter of the gear 1 6 is greater than the diameter of the gear 2 62, and the electric cylinder 22 is fixedly installed on the bottom inner wall of the shell 1, and the working end of the electric cylinder 22 is fixedly connected to the bottom side of the placement table 2, and the placement table 2 is provided with a placement groove and a circular opening;

[0037] A support column 23 is fixedly mounted on the bottom inner wall of the shell 1, and a support plate 24 is fixedly mounted on the top of the support column 23. The support plate 24 is adapted to the circular opening and can push the ABF carrier placed in the placement groove upward under the action of the support plate 24 when the placement table 2 moves downward, thereby facilitating the operator to perform the unloading operation. A mounting plate 42 is fixedly mounted in the support frame 4, and the motor 431 is fixedly mounted on the mounting plate 42. The U-shaped plate 43 is radially fixedly mounted on the output shaft of the motor 431 and is located below the mounting plate 42. The two mounting seats 44 are both slidably mounted on the U-shaped plate 43;

[0038] A second motor 442 is fixedly mounted on one side of the U-shaped plate 43. A bidirectional screw 441 is rotatably mounted on the U-shaped plate 43. Two mounting seats 44 are both threadedly connected to the bidirectional screw 441. One end of the bidirectional screw 441 is axially fixedly connected to the output shaft of the second motor 442. The spacing between the two mounting seats 44 can be adjusted, thereby achieving position adjustment of the test pin 45. The two test pins 45 are respectively fixedly mounted on the bottom side of the corresponding mounting seat 44.

[0039] A plurality of upper sleeves 321 are fixedly installed on the bottom side of the support frame 3, a guide ring 322 is fixedly installed on the bottom end of the upper sleeve 321, and the same lower sleeve 323 is slidably installed on the outer side of the guide ring 322 and the upper sleeve 321. The same spring 324 is fixedly installed on the bottom inner wall of the lower sleeve 323 and the top inner wall of the upper sleeve 321, which can press and limit the ABF carrier placed in the placement groove as the support frame 3 moves downward, and can also achieve effective buffering.

[0040] In this embodiment, in order to avoid damage to the ABF carrier plate when the ABF carrier plate is pressed and limited, and to enhance the stability of the pressing and limiting, a rubber pad 325 is fixedly installed at the bottom end of the lower sleeve 323 .

[0041] In this embodiment, in order to ensure that the two mounting seats 44 can maintain stable sliding on the U-shaped plate 43, two guide rods arranged parallel to the bidirectional screw rod 441 are fixedly installed on the U-shaped plate 43, and the two mounting seats 44 are both slidably connected to the two guide rods.

[0042] In this embodiment, in order to ensure the accuracy of adjustment, both the motor 1 431 and the motor 2 442 are servo motors.

[0043] The circuits, electronic components and module structures involved all use existing technologies, which can be fully implemented by those skilled in the art. Needless to say, the content protected by this application does not involve improvements to software, circuits and methods.

[0044] Working principle: When in use, first turn on the power and place the ABF carrier to be tested in the placement slot of the placement table 2, then start the electric cylinder 22, the electric cylinder 22 pushes the placement table 2 to move upward, and the ABF carrier is lifted accordingly. Due to the engagement of the tooth plate 1 61 and the gear 1 6, the placement table 2 and the support frame 1 3 move in the direction of approaching each other, and are stably fixed in the placement slot by multiple pressure-holding limit assemblies 32. Since the gear 1 6 and the gear 2 62 are set on the same rotating shaft, the gear 2 62 keeps synchronous rotation with the gear 1 6. At the same time, due to the engagement of the tooth plate 2 63 and the gear 2 62, the support frame 2 4 also moves downward, and the diameter of the gear 1 6 is larger than the diameter of the gear 2 62, so that the movement stroke of the support frame 2 4 is larger than that of the support frame 1-3 movement stroke, at the same time, motor 1 431 drives the U-shaped plate 43 to rotate, and adjusts the distance between the two mounting seats 44 through motor 2 442 and the bidirectional screw rod 441, so that the position of the test needle 45 can be adjusted to the position required for testing, and after the ABF carrier is fixed by the pressure-holding limit component 32, the placement table 2 is continued to be controlled to move upward for a certain distance, so that the test needle 45 moves downward and performs precise electrical testing on specific test points on the ABF carrier. After the test is completed, the electric cylinder 22 is started again to control the placement table 2 to descend together with the ABF carrier. As the placement table 2 descends, the ABF carrier can contact the support plate 24, and as the placement table 2 continues to descend, the ABF carrier can be pushed out of the placement slot, making it convenient for the operator to perform unloading operations.

[0045] The above is a detailed introduction to the micro-pitch ABF substrate test fixture provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that for ordinary technicians in this technical field, various improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A fine pitch ABF carrier board test fixture, characterized in that: It comprises a housing (1), a placement table (2), a first support frame (3), a second support frame (4), a support guide assembly, an electric cylinder (22), a plurality of pressure-holding limit assemblies (32), an auxiliary unloading assembly, two transmission assemblies, a U-shaped plate (43), a first motor (431), an adjustment assembly, two mounting seats (44) and two test pins (45); The front and rear sides of the shell (1) are both provided with rectangular openings, the placement table (2), support frame one (3) and support frame two (4) are all arranged in the shell (1) and arranged in sequence from bottom to top, the support guide assembly is arranged in the shell (1) and is connected to the placement table (2), support frame one (3) and support frame two (4), the two transmission assemblies are both arranged on the support guide assembly and are symmetrically arranged based on the placement table (2), the electric cylinder (22) is fixedly mounted on the bottom inner wall of the shell (1), and the working end of the electric cylinder (22) is fixedly connected to the bottom side of the placement table (2), the auxiliary unloading assembly is arranged on the bottom inner wall of the shell (1), and the placement table (2) is provided with a placement groove and a circular opening, and the auxiliary unloading assembly is adapted to the circular opening, a mounting plate (42) is fixedly installed in the support frame 2 (4), the motor 1 (431) is fixedly installed on the mounting plate (42), the U-shaped plate (43) is radially fixedly installed on the output shaft of the motor 1 (431) and is located below the mounting plate (42), the two mounting seats (44) are both slidably installed on the U-shaped plate (43), the adjustment assembly is arranged on the U-shaped plate (43) and is connected to the two mounting seats (44), the two test pins (45) are respectively fixedly installed on the bottom side of the corresponding mounting seats (44), and a plurality of pressure-holding limit assemblies (32) are all arranged on the bottom side of the support frame 1 (3) and adapted to the placement groove.

2. The fine pitch ABF substrate test fixture according to claim 1, characterized in that: The support guide assembly comprises two upper support plates (41), two middle support plates (31), two lower support plates (21) and a plurality of guide columns (5); a plurality of guide columns (5) are fixedly installed vertically on the top inner wall and the bottom inner wall of the shell (1); a lower support plate (21), a middle support plate (31) and an upper support plate (41) are fixedly installed on both sides of the placement table (2), both sides of the support frame 1 (3) and both sides of the support frame 2 (4); the two upper support plates (41), the two middle support plates (31) and the two lower support plates (21) are respectively slidably connected to the corresponding plurality of guide columns (5).

3. The fine pitch ABF substrate test fixture according to claim 1, characterized in that: The pressing and limiting assembly (32) comprises an upper sleeve (321), a guide ring (322), a lower sleeve (323) and a spring (324); a plurality of upper sleeves (321) are fixedly mounted on the bottom side of the support frame (3); a guide ring (322) is fixedly mounted on the bottom end of the upper sleeve (321); a same lower sleeve (323) is slidably mounted on the outer sides of the guide ring (322) and the upper sleeve (321); a same spring (324) is fixedly mounted on the bottom inner wall of the lower sleeve (323) and the top inner wall of the upper sleeve (321).

4. The fine pitch ABF substrate test fixture according to claim 3, characterized in that: A rubber pad (325) is fixedly mounted on the bottom end of the lower sleeve (323).

5. The fine pitch ABF substrate test fixture according to claim 2, characterized in that: The transmission assembly comprises a gear 1 (6), a gear 2 (62), a tooth plate 2 (63) and two tooth plates 1 (61). The lower support plate (21) and the middle support plate (31) are fixedly mounted with tooth plates 1 (61) on the sides close to each other. Two rotating shafts are rotatably mounted on the inner walls of the front and rear sides of the housing (1). Gear 1 (6) and gear 2 (62) are fixedly sleeved on the rotating shafts. The two tooth plates 1 (61) are meshed with gear 1 (6). A tooth plate 2 (63) is fixedly mounted on the bottom side of the upper support plate (41). Gear plate 2 (63) is meshed with gear 2 (62).

6. The fine pitch ABF substrate test fixture according to claim 5, characterized in that: The diameter of the gear one (6) is greater than the diameter of the gear two (62).

7. The fine pitch ABF substrate test fixture according to claim 1, characterized in that: The adjustment assembly includes a bidirectional screw rod (441) and a second motor (442). The second motor (442) is fixedly mounted on one side of the U-shaped plate (43). The bidirectional screw rod (441) is rotatably mounted on the U-shaped plate (43). Both mounting seats (44) are threadedly connected to the bidirectional screw rod (441), and one end of the bidirectional screw rod (441) is axially fixedly connected to the output shaft of the second motor (442).

8. The fine pitch ABF substrate test fixture according to claim 7, characterized in that: Two guide rods arranged parallel to the bidirectional screw rod (441) are fixedly mounted on the U-shaped plate (43), and the two mounting seats (44) are both slidably connected to the two guide rods.

9. The fine pitch ABF substrate test fixture according to claim 1, characterized in that: The auxiliary unloading assembly comprises a supporting plate (24) and a supporting column (23); the supporting column (23) is fixedly mounted on the bottom inner wall of the shell (1); the supporting plate (24) is fixedly mounted on the top end of the supporting column (23); and the supporting plate (24) is adapted to the circular opening.

10. The fine pitch ABF substrate test fixture according to claim 7, characterized in that: The motor 1 (431) and the motor 2 (442) are both servo motors.

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