Fixing device based on semiconductor chip packaging test

Abstract

The utility model relates to the technical field of semiconductor chip packaging test, in particular to a fixing device based on semiconductor chip packaging test, which comprises a fixing table and a fixing device, and the top end of the fixing table is provided with the fixing device. The fixing device comprises a groove, a bidirectional screw, a first motor, moving seats, a rectangular block, a rectangular groove, a threaded rod, a second motor, a first sliding block, a second sliding block, a third motor, a connecting column, a first fixing block, a second fixing block, a force sensor and a flexible block, and rotation of the bidirectional screw enables the two moving seats to move towards the semiconductor chip along the groove. The clamping force is monitored by the force sensors on the first fixing block and the second fixing block until the rectangular block is close to the two sides of the chip, the flexible blocks firstly make contact with the side walls of the two ends of the semiconductor chip, the clamping force is monitored by the force sensors on the first fixing block and the second fixing block, the first motor continues to rotate, and the clamping force is gradually increased until the clamping force detected by the force sensors reaches a preset safety value.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor chip package test, concretely to a fixing device based on semiconductor chip package test. BACKGROUND

[0002] It is known that with the rapid development of semiconductor technology, semiconductor chips are more and more widely used in electronic devices. In order to ensure the performance and reliability of the chip, package testing is an essential link. Package testing not only needs to detect the electrical performance of the chip, but also needs to be tested under different environmental conditions to ensure the stability and reliability of the chip in actual application.

[0003] At present, the existing semiconductor chip package test fixing device on the market has the following shortcomings: many fixing devices cannot ensure the accurate positioning of the chip when fixing the chip, which affects the accuracy of the test results, and the clamping force is uneven or too large when clamping the chip, which easily causes damage to the surface of the chip, affects the performance of the chip, and most fixing devices can only be simply fixed and cannot realize the height adjustment and angle overturning of the chip, which limits the comprehensiveness and accuracy of the test. UTILITY MODEL CONTENTS

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a fixing device based on semiconductor chip package test.

[0006] (II) Technical scheme

[0007] To achieve the above object, the utility model provides the following technical scheme: A kind of fixing device based on semiconductor chip packaging test, including fixed platform and fixing device, the fixed platform top end is equipped with the fixing device, the fixing device includes groove, two-way screw rod, first motor, mobile seat, rectangular block, rectangular slot, threaded rod, second motor, first sliding block, second sliding block, third motor, connecting column, first fixed block, second fixed block, force sensor and flexible block, the top end of the fixed platform is transversely equipped with the groove, the two-way screw rod is rotatably installed in the groove, one end of the two-way screw rod is equipped with the first motor and penetrates the groove side wall, the mobile seat is threadedly installed at the left and right ends of the two-way screw rod, the top end of two groups of mobile seats is fixedly installed with the rectangular block, the side wall of the corresponding side of two groups of rectangular blocks is equipped with the rectangular slot, the threaded rod is rotatably installed in the rectangular slot, the second motor is installed at the top end of two groups of threaded rods and penetrates the rectangular slot top wall, the first sliding block and the second sliding block are threadedly installed in two groups of threaded rods respectively, the side wall of the side of the first sliding block and the second sliding block that is close to each other is equipped with the second motor and the connecting column respectively, the output end of the second motor is equipped with the first fixed block, the side wall of the connecting column is equipped with the second fixed block by bearing, the corresponding side wall of the first fixed block and the second fixed block is equipped with the force sensor, the side wall of the side of the first fixed block and the second fixed block that is close to the force sensor is equipped with the flexible block.

[0008] In order to prevent the groove and the rectangular slot from entering foreign matter, the utility model improves that two groups of first telescopic curtains are installed in the groove and symmetric with the central axis of the mobile seat, and two groups of second telescopic curtains are installed in the rectangular slot and symmetric with the central axis of the first sliding block and the second sliding block.

[0009] Preferably, the utility model improves that the flexible block is made of rubber material.

[0010] In order to facilitate the installation of the fixed plate, the utility model improves that the front and rear ends of the side wall of the left and right ends of the fixed platform are equipped with the fixed plate, and the mounting hole is symmetrically arranged on the fixed plate.

[0011] In order to ensure the stability and accuracy of the operation of the first motor, the second motor and the third motor, the utility model improves that the first motor, the second motor and the third motor are all servo motors.

[0012] In order to ensure the synchronous operation of the two groups of second motors, the utility model improves that the two groups of second motors are synchronous motors.

[0013] In order to protect the first motor, the second motor and the third motor, the utility model improves, the outer wall of first motor, second motor and the third motor all is equipped with the protective shell.

[0014] In order to limit two groups of mobile seats and facilitate the preliminary positioning of semiconductor chips, the utility model improves, the top wall middle part of rectangular groove is installed with the limiting block.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a kind of fixed device based on semiconductor chip package test, with following beneficial effects:

[0017] The fixed device based on semiconductor chip package test, by the fixed device of setting, the rotation of bidirectional screw rod makes two mobile seats move along the groove to the semiconductor chip direction, until rectangular block approaches the two sides of chip, flexible block first contacts the two end sidewalls of semiconductor chip, ensure that no damage to chip surface when preliminary contact, force sensor ensures that the clamping force of first fixed block and second fixed block reaches preset safety value, chip is firmly fixed on fixed platform, ensure that it does not move during testing, through the control of second motor and threaded rod, the height of chip can be adjusted, through the control of third motor and connecting column, the angle of chip can be overturned, facilitate the detection of the reverse side of chip, realize the all-around detection of chip, improve the comprehensiveness and accuracy of test. ACCURACY

[0018] Figure 1 It is half cut after the protective shell of the utility model and the schematic diagram of three-dimensional structure shows;

[0019] Figure 2 It is hidden after the first telescopic curtain and the second telescopic curtain of the utility model and the schematic diagram of three-dimensional structure shows;

[0020] Figure 3 It is the first fixed block of the utility model and the schematic diagram of half cut three-dimensional structure shows;

[0021] Figure 4 It is the local part A of the utility model and the schematic diagram of enlarged structure shows. Figure 3

[0022] In the drawing: 1, fixed platform;2, groove;3, bidirectional screw rod;4, first motor;5, mobile seat;6, rectangular block;7, rectangular groove;8, threaded rod;9, second motor;10, first sliding block;11, second sliding block;12, third motor;13, connecting column;14, first fixed block;15, second fixed block;16, force sensor;17, flexible block;18, first telescopic curtain;19, second telescopic curtain;20, mounting plate;21, mounting hole;22, protective shell;23, limiting block.​ DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-4The utility model provides a kind of based on semiconductor chip package test's fixing device, including fixed platform 1 and fixing device, the fixed platform 1 top end is equipped with the fixing device, the fixing device includes recess 2, two-way screw rod 3, first motor 4, moving seat 5, rectangular block 6, rectangular slot 7, threaded rod 8, second motor 9, first slider 10, second slider 11, third motor 12, connecting column 13, first fixed block 14, second fixed block 15, force sensor 16 and flexible block 17, the fixed platform 1 top end transversely is equipped with the recess 2, the recess 2 is rotatably equipped with the two-way screw rod 3, the two-way screw rod 3 one end is equipped with the first motor 4 and penetrates the recess 2 side wall, the two-way screw rod 3 left and right two ends are threadedly equipped with the moving seat 5, two groups of moving seat 5 top end are fixedly equipped with the rectangular block 6, two groups of rectangular block 6 corresponding side wall is equipped with the rectangular slot 7, the rectangular slot 7 is rotatably equipped with the threaded rod 8, two groups of threaded rod 8 top end is equipped with the second motor 9 and penetrates the rectangular slot 7 top wall, two groups of threaded rod 8 are threadedly equipped with the first slider 10 and the second slider 11, the first slider 10 and the second slider 11 mutually close one side wall is equipped with the second motor 9 and the connecting column 13 respectively, the output of the second motor 9 is equipped with the first fixed block 14, the side wall of connecting column 13 is equipped with the second fixed block 15 by bearing, the corresponding side wall of the first fixed block 14 and the second fixed block 15 is equipped with the force sensor 16, the first fixed block 14 and the second fixed block 15 close the side wall of force sensor 16 is equipped with the flexible block 17, in the embodiment, the semiconductor chip to be tested is placed in the recess 2 central top wall of fixed platform 1, is started first motor 4 by PLC control system, drives two-way screw rod 3 rotation, the rotation of two-way screw rod 3 makes two moving seats 5 move along the recess 2 to semiconductor chip direction, until rectangular block 6 approaches two sides of chip, flexible block 17 first contacts two end side walls of semiconductor chip, the force sensor 16 on first fixed block 14 and second fixed block 15 starts monitoring clamping force, first motor 9 continues to rotate, gradually increases clamping force, until the clamping force detected by force sensor 16 reaches preset safety value, when clamping force reaches preset value, first motor 9 stops rotating, ensures that clamping force does not increase any more, chip is firmly fixed on fixed platform 1, ensures that it does not move during testing, flexible block 17 can evenly distribute clamping force, reduce local pressure on chip surface, prevent damage to chip, protect the integrity of chip surface, ensure that the performance of chip after testing is not affected, then, testing instrument contacts test point of chip by probe, carries out various electrical tests, environmental tests etc., then when the back of semiconductor chip needs to be detected or the height of fixed semiconductor chip is adjusted, simultaneously start two groups of second motor 9, second motor 9 drives threaded rod 8 rotation,The threaded rod 8 drives the first slider 10 and the second slider 11 to move linearly along the rectangular groove 7 during rotation, the two groups of sliders drive the first fixed block 14 and the second fixed block 15 and the fixed semiconductor chip to be adjusted to rise, the height is adjusted, then the third motor 12 is started, the third motor 12 output end drives the clamped fixed semiconductor chip, through the rotating connection of the connecting column 13 and the slider, the angle is turned over, the back of the semiconductor chip can be detected, the all-around detection of the semiconductor chip is realized.

[0025] In actual use, further prevent the groove 2 and the rectangular groove 7 from entering foreign matter, in the embodiment, the groove 2 is symmetrically provided with two groups of first telescopic curtains 18 with the axis of the moving seat 5, the rectangular groove 7 is symmetrically provided with two groups of second telescopic curtains 19 with the axis of the first slider 10 and the second slider 11, the first telescopic curtain 18 expands or shrinks with the movement of the moving seat 5, covers both sides of the moving seat 2 in the groove, prevents foreign matter from entering, the second telescopic curtain 19 expands or shrinks with the movement of the first slider and the second slider 11, covers both sides of the rectangular groove 7, prevents foreign matter from entering, and can ensure the stability of the driving assembly in various detection environments.

[0026] Preferably, in the embodiment, the flexible block 17 is made of rubber material, which has good elasticity and deformation ability, can deform when contacting the chip, so as to uniformly distribute the clamping force on the surface of the chip.

[0027] In actual use, further facilitate the installation of the fixed plate, in the embodiment, the fixed platform 1 is provided with the installation plate 20 on the front and rear ends of the left and right two end side walls, the installation plate 20 is symmetrically provided with the installation hole 21, the installation plate 20 can be installed at the target position, and the installation plate 20 is installed at the target position by means of tools through the installation hole 21, so as to ensure that the installation plate 20 is fixed at the target position.

[0028] In actual use, further ensure the stability and accuracy of the operation of the first motor 4, the second motor 9 and the third motor 12, in the embodiment, the first motor 4, the second motor 9 and the third motor 12 are all servo motors, which can control the position, speed and torque with high precision, the servo motor adopts closed loop control, has good stability, can avoid stall, vibration and other problems, and improves the stability and accuracy of the operation of the first motor 4, the second motor 9 and the third motor 12.

[0029] In actual use, further ensure that the two groups of second motors 9 run synchronously, in the embodiment, the two groups of second motors 9 are synchronous motors, which can maintain the same speed and position when receiving the same control signal, thereby realizing synchronous movement, ensuring that the two groups of sliders (the first slider 10 and the second slider 11) always maintain synchronization during movement, avoiding chip damage caused by speed or position difference, and synchronous movement can ensure that the chip is evenly stressed during fixing, reducing chip movement or deformation caused by uneven unilateral stress.

[0030] In actual use, the first motor 4, the second motor 9 and the third motor 12 are further protected, in the embodiment, the outer wall of the first motor 4, the second motor 9 and the third motor 12 is provided with a protective shell 22, which can effectively block dust, dirt and other particulate matter from entering the motor, so that the motor can work stably under different environmental conditions, and the application range of the fixing device is expanded.

[0031] In actual use, the two groups of moving seats 5 are further limited and facilitate preliminary positioning of the semiconductor chip, in the embodiment, the top wall of the rectangular groove 7 is provided with a limiting block 23, which is installed in the middle of the top wall of the rectangular groove 7, and can limit the movement range of the two groups of moving seats 5, the position of the limiting block 23 can be used as a reference point to help the operator or the automatic system to preliminarily position the semiconductor chip, and improve the positioning efficiency.

[0032] To explain the possible application scenarios, technical principles, specific schemes that can be implemented, purposes and effects that can be achieved, etc. of the present application, the specific embodiments listed below are combined with the drawings for detailed description. The embodiments described in this paper are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

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

Claims

1. A fixture for testing semiconductor chip packages, comprising a fixture table (1) and a fixture, characterized in that: The top of the fixing table (1) is provided with the fixing device, which comprises a groove (2), a bidirectional screw rod (3), a first motor (4), a moving seat (5), a rectangular block (6), a rectangular groove (7), a threaded rod (8), a second motor (9), a first sliding block (10), a second sliding block (11), a third motor (12), a connecting column (13), a first fixed block (14), a second fixed block (15), a force sensor (16) and a flexible block (17), the top of the fixing table (1) is transversely provided with the groove (2), the groove (2) is rotatably provided with the bidirectional screw rod (3), one end of the bidirectional screw rod (3) penetrates the side wall of the groove (2) and is provided with the first motor (4), the left and right ends of the bidirectional screw rod (3) are both threadedly provided with the moving seat (5), the top of the two groups of moving seats (5) is fixedly provided with the rectangular block (6), the side wall of the corresponding side of the two groups of rectangular blocks (6) is provided with the rectangular groove (7), the rectangular groove (7) is rotatably provided with the threaded rod (8), the top of the two groups of threaded rods (8) penetrates the top wall of the rectangular groove (7) and is provided with the second motor (9), the two groups of threaded rods (8) are respectively threadedly provided with the first sliding block (10) and the second sliding block (11), the side wall of the side of the first sliding block (10) and the second sliding block (11) close to each other is respectively provided with the second motor (9) and the connecting column (13), the output end of the second motor (9) is provided with the first fixed block (14), the side wall of the connecting column (13) is provided with the second fixed block (15) through a bearing, the corresponding side walls of the first fixed block (14) and the second fixed block (15) are both provided with the force sensor (16), the side walls of the first fixed block (14) and the second fixed block (15) close to the force sensor (16) are both provided with the flexible block (17).

2. The fixture for semiconductor chip package testing according to claim 1, wherein: The two groups of first telescopic curtains (18) are symmetrically installed in the groove (2) with the central axis of the moving seat (5), and the two groups of second telescopic curtains (19) are symmetrically installed in the rectangular groove (7) with the central axis of the first sliding block (10) and the second sliding block (11).

3. The fixture of claim 2, wherein: the first and second clamps are configured to hold the semiconductor chip package in a vertical orientation; and the third and fourth clamps are configured to hold the semiconductor chip package in a horizontal orientation. The flexible block (17) is made of rubber material.

4. The fixture of claim 3, wherein: The front and back ends of the left and right side walls of the fixing table (1) are both provided with mounting plates (20), and the mounting plates (20) are both symmetrically provided with mounting holes (21).

5. The fixture of claim 4, wherein: the first and second clamps are each configured to hold a semiconductor chip package in a vertical orientation; and the first and second clamps are each configured to hold a semiconductor chip package in a horizontal orientation. The first motor (4), the second motor (9) and the third motor (12) are all servo motors.

6. The fixture of claim 5, wherein: The two groups of second motors (9) are synchronous motors.

7. The fixture of claim 6, wherein: The outer walls of the first motor (4), the second motor (9) and the third motor (12) are all provided with protective shells (22).

8. The fixture of claim 7, wherein: The middle part of the top wall of the rectangular groove (7) is provided with a limiting block (23).

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