Test fixture

Abstract

The utility model discloses a test fixture, which comprises a fixture base, a plurality of test seats, a driving plate, a calibration assembly and a reinforcing rib plate, the plurality of test seats are symmetrically arranged and are uniformly distributed by taking the central point of the upper surface of the jig base as the center; a clamping groove for accommodating a product to be tested is formed in the center of each testing seat, the driving plate comprises feeding ports which are arranged in one-to-one correspondence with the testing seats, and the feeding ports penetrate through the upper side surface and the lower side surface of the driving plate and are arranged in correspondence with the clamping grooves; and the driving plate can reciprocate in a first direction, and the driving plate is pressed down to act on the test seat, so that a product to be tested can be placed in the clamping groove. According to the test fixture, a plurality of chips can be fixed at a time for testing, so that the test efficiency is improved, and the consistency of test data can be ensured; through reasonable layout of the three position sensors and the three reference sensors, interference factors are eliminated, so that the consistency of acquired data is good, and the real-time accuracy of the data is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to chip testing technical field, more specifically, relate to a test fixture. BACKGROUND

[0002] Chip testing is a very important link in modern electronic industry, and it is a key step to ensure chip quality and performance. In chip testing, test equipment evaluates the quality and reliability of chips through electrical performance and functional testing. In the past few decades, with the rapid development of electronic equipment, chip testing technology has also been greatly developed. In recent years, people have carried out in-depth research on chip testing technology. At present, chip testing is single chip testing, and the testing of single chip seriously affects the testing efficiency when there are many chips. SUMMARY

[0003] In view of above problem, one purpose of the utility model lies in providing a test fixture.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A test fixture comprises:

[0006] A fixture base, a plurality of test seats arranged on the fixture base, a driving plate arranged on the side of the test seat away from the fixture base, a calibration component arranged on the surface of the side of the fixture base mounting the test seat, and a reinforcing rib plate fixedly combined on the side of the fixture base away from the test seat.

[0007] The plurality of test seats are symmetrically arranged, and are evenly distributed with the center point of the upper surface of the fixture base as the center.

[0008] The center of the test seat is provided with a clamping groove accommodating the product to be tested, the driving plate comprises a feeding port corresponding to the test seat, the feeding port penetrates the upper and lower surfaces of the driving plate, and the feeding port is arranged corresponding to the clamping groove.

[0009] The driving plate can reciprocate in the first direction, and the driving plate presses the test seat to enable the product to be tested to be placed in the clamping groove.

[0010] The first direction is perpendicular to the fixture base.

[0011] In addition, the test seat comprises a base, an upper pressing cover floatingly arranged on the base, and a pressing nozzle arranged between the base and the upper pressing cover.

[0012] The clamping groove is located at the center of the base, one end of the pressing nozzle is correspondingly pressed into the clamping groove, and the other end is hinged to the upper pressing cover.

[0013] The upper pressing cover is provided with an opening for placing the product to be tested in the clamping groove.

[0014] The feeding opening and the opening are correspondingly arranged, and the driving plate is pressed downward in the first direction to drive the upper pressing cover to move downward, so that the pressing nozzle is raised to place the product to be tested in the clamping groove.

[0015] In addition, the upper pressing cover is connected with springs between the four corners and the base.

[0016] In addition, the test seat further comprises an adapter plate in the base.

[0017] The adapter plate is correspondingly arranged below the clamping groove, and the upper surface of the adapter plate comprises test contacts corresponding to the product to be tested.

[0018] In addition, the test fixture further comprises a driving assembly, the driving assembly comprises driving cylinders correspondingly arranged at the four corners of the fixture base, the driving cylinders and the driving plate are combined and fixed, and the driving plate can be driven to reciprocate in the first direction.

[0019] In addition, the reinforcing rib plate comprises a main plate and reinforcing ribs on the side of the main plate away from the fixture base, and the reinforcing ribs are in a cross shape.

[0020] In addition, the calibration assembly comprises a first position sensor, a second position sensor and a third position sensor.

[0021] The first position sensor and the second position sensor are respectively arranged on two opposite sides of the fixture base in the second direction.

[0022] The third position sensor is arranged between the first position sensor and the second position sensor and in the central region of the fixture base, and a plurality of test seats are arranged in a row-column matrix with the central region where the third position sensor is arranged as the center.

[0023] In addition, the calibration assembly comprises a first reference sensor and two second reference sensors, the first reference sensor is used to feedback the position interference factors in the first direction received by the fixture base, and the second reference sensor is used to feedback the position interference factors in the second direction and the third direction received by the fixture base.

[0024] The first reference sensor is arranged along the center line of the fixture base in the third direction.

[0025] Two second reference sensors are respectively located at two opposite sides of the first reference sensor, and the first reference sensor and the two second reference sensors equally divide the jig base into four parts along a third direction.

[0026] In addition, an optional solution is that the jig base includes a first plug-in port and a second plug-in port at two opposite sides in the second direction to communicate with a test device.

[0027] In addition, an optional solution is that the test jig further includes an acoustic pressure sensor arranged at a central region of the jig base, and the plurality of test seats are arranged in a matrix around the central region where the acoustic pressure sensor is located.

[0028] The utility model discloses the beneficial effects are as follows:

[0029] In view of the technical problems existing in the prior art, the utility model provides a test fixture, through the design of test seat structure and the cooperation with drive board, realizes a plurality of chips fixed and tested once, improves test efficiency, and test seat adopts symmetrical layout, can guarantee the consistency of test data, through the reasonable layout of first position sensor, second position sensor, third position sensor and first reference sensor, second reference sensor, third reference sensor, excludes interference factor, makes the consistency of acquisition data good, guarantees the real -time accuracy of data. BRIEF DESCRIPTION OF DRAWINGS

[0030] The specific embodiment of the utility model will be further explained in detail in combination with the drawings.

[0031] Figure 1 The structure schematic diagram of the test fixture provided by the utility model embodiment is shown.

[0032] Figure 2 The exploded view of the test fixture provided by the utility model embodiment is shown.

[0033] Figure 3 The top view of the jig base provided by the utility model embodiment is shown.

[0034] Figure 4 The exploded schematic view of the test seat provided by the utility model embodiment is shown.

[0035] Figure 5 The sectional view of the test seat provided by the utility model embodiment is shown.

[0036] Figure 6 The sectional view of the test seat when the upper cover is pressed down is shown.

[0037] Figure 7The axial view of the reinforcing rib plate is shown in the embodiment of the utility model. DETAILED DESCRIPTION

[0038] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0039] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them.

[0041] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0042] In view of the defects of the prior art, the utility model provides a test fixture for chip testing process, which is combined with Figures 1-7 As shown in the figure, the test fixture comprises: a fixture base 1, a plurality of test seats 2 arranged on the fixture base 1, a driving plate 3 arranged on the side of the test seat 2 away from the fixture base 1, a calibration assembly arranged on the surface of the side of the fixture base 1 installed with the test seat 2, and a reinforcing rib plate 4 combined and fixed to the side of the fixture base 1 away from the test seat 2.

[0043] Each test seat 2 can accommodate one chip to be tested. The plurality of test seats 2 are symmetrically arranged, with the center point of the upper surface of the fixture base 1 as the center.

[0044] The center of the test seat 2 is provided with a clamping groove 24 for accommodating the chip to be tested, and the driving plate 3 is provided with a feeding port 31 corresponding to the test seat 2, the feeding port 31 penetrating through the upper and lower surfaces of the driving plate 3 and corresponding to the clamping groove 24.

[0045] The driving plate 3 can reciprocate in the first direction, and the driving plate 3 presses the test seat 2 to enable the chip to be tested to be placed in the clamping groove 24. It can be understood that the first direction in the embodiment is the z-axis direction in the coordinate system shown in Figure 1

[0046] In a specific embodiment, as shown in Figures 4-6 , the test seat 2 comprises a base 21, an upper cover 22 floatingly arranged on the base 21, and a pressing nozzle 23 arranged between the base 21 and the upper cover 22.

[0047] The clamping groove 24 is located at the center of the base 21, one end of the pressing nozzle 23 corresponds to the clamping groove 24, and the other end is hinged to the upper cover 22. The center of the upper cover 22 is provided with an opening 221, and the opening 221 exposes the clamping groove 24 to the upper surface of the test seat 2, so that the chip to be tested can be placed in the clamping groove 24.

[0048] The feeding port 31 and the opening 221 are correspondingly arranged, so that the chip to be tested can be placed in the clamping groove 24. The driving plate 3 can reciprocate in the first direction, and the driving plate 3 presses the upper cover 22 to the base 21, the upper cover 22 moves downward, and the pressing nozzle 23 is extruded by the base 21 to be raised to place the chip to be tested in the clamping groove 24.

[0049] In a specific embodiment, the test seat 2 comprises two pressing nozzles 23, and the two pressing nozzles 23 are hinged to the two opposite sides of the upper cover 22, respectively. The two pressing nozzles 23 simultaneously act on the chip to be tested in the clamping groove 24 to press the chip to be tested and test it.

[0050] The pressing nozzle 23 comprises a connecting portion 231, a hook portion 232, and a driving portion 233 connecting the connecting portion 231 and the hook portion 232. The hook portion 232 can enter and exit the clamping groove 24 under the driving of the upper cover 22. When the hook portion 232 exits the clamping groove 24, the two pressing nozzles 23 are opened, and the chip to be tested can be fed into the clamping groove 24 or the tested chip can be taken out. When the hook portion 232 is located in the clamping groove 24, the chip to be tested in the clamping groove 24 can be pressed to be tested.

[0051] The side of the upper cover 22 close to the base 21 comprises a recess portion 222, and the connecting portion 231 is located in the recess portion 222 and is hinged to the upper cover 22. The upper cover 22 is floatingly arranged on the base 21, so that the lower end surface of the driving portion 233 abuts against the upper end surface of the base 21, as shown in Figure 6 ​As shown, when the upper pressing cover 22 is lowered under the action of the driving plate 3, the driving part 233 is pressed by the base 21 to drive the pressing nozzle 23 to rotate, so that the hook part 232 is raised upward to leave the clamping groove 24, so that the to-be-tested chip can be placed into the clamping groove 24, or so that the tested chip can be taken out of the clamping groove 24.

[0052] In a specific embodiment, between the four corners of the upper pressing cover 22 and the base 21, a spring 25 is arranged, and the upper pressing cover 22 is arranged to be floating above the base 21 through the spring 25. When the driving plate 3 drives the upper pressing cover 22 to be pressed downward, the spring 25 is compressed to accumulate elastic potential energy; when the driving plate 3 is lifted to remove the force applied to the upper pressing cover 22, the upper pressing cover 22 can be reset under the action of the spring 25, so that the pressing nozzle 23 is pressed against the to-be-tested product in the clamping groove.

[0053] In a specific embodiment, the test seat further comprises a conversion board 26 arranged in the base 21. The conversion board 26 is arranged below the clamping groove 24, and the upper surface of the conversion board 26 comprises test contacts corresponding to the pins of the to-be-tested chip, so as to realize the press contact between the to-be-tested chip and the conversion board 26.

[0054] In a specific embodiment, as shown in the figure, Figures 1-2 The test fixture further comprises a driving assembly 5, which is specifically four driving cylinders 50. The output ends of the four driving cylinders 50 are respectively combined and fixed with the four corners of the driving plate 3. The four driving cylinders 50 move synchronously to enable the driving plate 3 to reciprocate along the first direction. When the driving plate 3 is lowered, it synchronously presses the upper pressing plate 22 of each test seat 2 arranged on the fixture base 1, so that the pressing nozzle 23 is opened to enable the chip to be fed or discharged. When the driving plate 3 is lifted, each upper pressing plate 22 is reset, and the pressing nozzle 23 correspondingly presses the to-be-tested product in each test seat 2 to perform testing. Through the cooperation of the driving assembly 5 and the test seat 2, multiple test chips are simultaneously press contacted, which greatly saves the time of operating the single test seat 2, enables the test preparation work of multiple chips to be completed in a short time, greatly improves the test efficiency, and further ensures the consistency of the press contact time and the press contact force of multiple to-be-tested chips, which helps to ensure that the initial conditions of each chip are the same and improves the consistency of the test results.

[0055] In a specific embodiment, the reinforcing rib plate 4 is combined and fixed to the side of the fixture base 1 away from the test seat 2, as shown in the figure, Figure 7 The reinforcing rib plate 4 comprises a main plate 41 and reinforcing ribs 42 formed on the side surface of the main plate 41 away from the fixture base 1, and the reinforcing ribs 42 are in a rice-shaped distribution. The arrangement of the reinforcing rib plate 4 can improve the rigidity and stability of the fixture base 1, reduce the influence of external interference on the test results during testing, and ensure the accuracy of the test data.

[0056] The jig base 1 is fixed on the main plate 41, which is a perforated plate, effectively reducing the weight of the main plate 41 without affecting the basic mechanical properties.

[0057] In one specific embodiment, the calibration assembly includes a first position sensor 61, a second position sensor 62, and a third position sensor 63. Among them, as shown in Figure 3 The first position sensor 61 and the second position sensor 62 are respectively located on the two opposite sides of the jig base 1 in the second direction. It can be understood that the second direction in this embodiment is the x-axis direction in Figure 1 .

[0058] The third position sensor 63 is located between the first position sensor 61 and the second position sensor 62, and is arranged in the central region 100 of the jig base 1. The plurality of test seats 2 are arranged in a row-column matrix with the central region 100 where the third position sensor 63 is located as the center. The first position sensor 61, the second position sensor 62, and the third position sensor 63 are used in cooperation to pre-feed the position of the test jig in the x-axis, y-axis, and z-axis directions before testing, prevent position deviation, provide basic guarantee for subsequent testing, and ensure the accuracy of test data.

[0059] In one specific embodiment, the calibration assembly includes a first reference sensor 71 and two second reference sensors 72. The first reference sensor 71 is used to feedback the position interference factors in the first direction that the jig base 1 receives during testing, and the second reference sensor 72 is used to feedback the position interference factors in the second direction and the third direction that the jig base 1 receives during testing, excluding the position interference factors in the x-axis, y-axis, and z-axis directions, and ensuring the accuracy of the test results.

[0060] In this embodiment, as shown in Figure 3 , the first reference sensor 71 is arranged along the center line of the jig base 1 in the third direction. It can be understood that the third direction is the y direction in Figure 1 .

[0061] The two second reference sensors 72 are respectively located on the two opposite sides of the first reference sensor 71, and the first reference sensor 71 and the two second reference sensors 72 equally divide the jig base 1 along the third direction into four parts.

[0062] In one specific example, as shown in Figure 3 , the jig base 1 is arranged with 32 test seats 2, which are equally divided into four groups and arranged in a cross-centered symmetrical manner on the jig base 1 with the central region 100 as the center. The layout of the first reference sensor 71 and the two second reference sensors 72 can cover the 32 test seats 2, ensuring the real-time accuracy of the chip test data.

[0063] In one embodiment, the two opposite sides of the jig base 1 in the second direction include a first plug-in port 11 and a second plug-in port 12 for communicating with the test equipment. The first plug-in port 11 can be a PCB male connector or a PCB female connector, and the second plug-in port 12 can be a PCB male connector or a PCB female connector, which can be designed to match the plug-in port of the test equipment.

[0064] In a specific embodiment, the test jig includes an acoustic pressure sensor 8 arranged in the center area 100 of the jig base 1, and the plurality of test seats 2 are arranged in a row-column matrix centered on the center area 100 where the acoustic pressure sensor 8 is located. The acoustic pressure sensor 8 can simultaneously perform acoustic pressure testing on a plurality of chips to be tested, ensuring the consistency of test data.

[0065] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description, and it is impossible to enumerate all the embodiments here. Any obvious changes or variations derived from the technical solutions of the utility model still fall within the protection scope of the utility model.

Claims

1. A test fixture, comprising: The utility model relates to a test fixture, which comprises a fixture base, a plurality of test seats arranged on the fixture base, a driving plate arranged on the side of the test seats away from the fixture base, a calibration assembly arranged on the side surface of the fixture base on which the test seats are installed, and a reinforcing rib plate fixedly combined on the side of the fixture base away from the test seats. The plurality of test seats are symmetrically arranged, with the center point of the upper surface of the fixture base as the center. The center of each test seat is provided with a clamping groove for accommodating a product to be tested. The driving plate comprises a feeding port corresponding to each test seat, which penetrates the upper and lower surfaces of the driving plate and corresponds to the clamping groove. The driving plate can reciprocate in a first direction, and the driving plate presses downward on the test seat to enable the product to be tested to be placed in the clamping groove. The first direction is perpendicular to the fixture base.

2. The test fixture of claim 1, wherein, Each test seat comprises a base, an upper pressing cover floatingly arranged on the base, and a pressing nozzle arranged between the base and the upper pressing cover. The clamping groove is located at the center of the base, one end of the pressing nozzle corresponds to the clamping groove, and the other end is hingedly connected to the upper pressing cover. An opening is formed in the center of the upper pressing cover to place the product to be tested in the clamping groove. The feeding port corresponds to the opening, and the driving plate drives the upper pressing cover to move downward in the first direction, so that the pressing nozzle is raised to place the product to be tested in the clamping groove.

3. The test fixture of claim 2, wherein, Springs are connected between the four corners of the upper pressing cover and the base.

4. The test fixture of claim 2, wherein, The test seat further comprises an adapter plate located in the base. The adapter plate corresponds to the clamping groove below, and the upper surface of the adapter plate comprises test contacts corresponding to the product to be tested.

5. The test fixture of claim 1, wherein, The test fixture further comprises a driving assembly, which comprises four driving cylinders corresponding to the four corners of the fixture base.

6. The test fixture of claim 1, wherein, The driving cylinders are fixedly combined with the driving plate and can drive the driving plate to reciprocate in the first direction.

7. The test fixture of claim 1, wherein The reinforcing rib plate comprises a main plate and reinforcing ribs located on the side of the main plate away from the fixture base. The calibration assembly comprises a first position sensor, a second position sensor, and a third position sensor. The first position sensor and the second position sensor are respectively located on the two opposite sides of the fixture base in a second direction.

8. The test fixture of claim 1, wherein, The third position sensor is located between the first position sensor and the second position sensor and is arranged in the central region of the fixture base. The calibration assembly comprises a first reference sensor and two second reference sensors. The first reference sensor is used to feedback the position interference factors in the first direction received by the fixture base, and the second reference sensor is used to feedback the position interference factors in the second direction and the third direction received by the fixture base. The first reference sensor extends along the center line of the fixture base in the third direction. Two second reference sensors are respectively located at two opposite sides of the first reference sensor, and the first reference sensor and the two second reference sensors equally divide the jig base into four parts along a third direction.

9. The test fixture of claim 1, wherein, Two opposite sides of the jig base in a second direction include a first plug-in port and a second plug-in port for communication with a test device.

10. The test fixture of claim 1, wherein, The test jig further includes an acoustic pressure sensor arranged at a central region of the jig base, and a plurality of test seats are arranged in a row-column matrix with the central region where the acoustic pressure sensor is located as the center.

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