KR20210137635A - The module IC inversion apparatus of 3D vision module IC test handler - Google Patents

Abstract

The present invention relates to a module IC inversion apparatus of a module IC test handler for stably clamping and rotating a module IC to direct a front surface or a rear surface of a substrate upward, and which allows a vision photographing unit to photograph an attached state image of a part attached to a substrate by improving the structure to rotate the module IC by 360° as a 2D or 3D image. First sliders (22) of the module IC inversion apparatus of a module IC test handler are installed at an installation plate (21) to be opposite to each other. A movable piece (24) including a single acting cylinder (23) and a support block (25) are installed at each of the first sliders (22). An elastic member (26) is installed between the movable piece (24) and the support block (25), and pushes the movable piece (24) from the support block (25) when compressed air is not supplied to the single acting cylinder (23). A gripper (32) is rotatively installed at the moving piece (24) to be supported by a cap (33). The gripper (32) is formed therein with a finger (32a) to grip the module IC (30) at a front end, a stopper (32b) to control a rotation amount, and a cut groove (32c) coupled with a rotator (43).

Description

Module IC inversion apparatus of 3D vision module IC test handler

The present invention relates to a module IC inverting device for a module IC test handler that stably clamps the module IC and rotates the module IC so that the front or rear surface of the substrate faces upward. It relates to a module IC reversing device of a module IC test handler that allows the module IC vision capturing unit to take a 2D or 3D image of the parts attached to the board while rotating the IC 360°.

In general, a module IC (memory module, SSD, etc.) refers to an independent circuit formed by soldering and fixing a plurality of ICs and components to both sides of a substrate.

Since these module ICs have higher added value than selling ICs individually, semiconductor manufacturers are developing them as main products.

Therefore, the module IC produced through the manufacturing process is an important component, and since the reliability of the product is very important, only products determined as good products through strict quality tests are shipped.

These module ICs are tested by the vision test handler, and the tested products go through a process of classifying them into good and bad according to the test results.

Here, the vision test handler is a device that takes a surface image of the module IC with a camera and compares the image with an image in a normal state to determine whether there is a defect.

In other words, the module IC tested by the vision test handler is expensive, so the reliability of the product is also very important. Only products judged as good products through strict quality tests are shipped, and the module ICs judged to be defective are modified or completely discarded. will do

Conventionally, a picker holds a module IC contained in a tray to load the module IC in a horizontal state in a carrier with an open bottom.

Accordingly, the upper surface of the module IC loaded horizontally on the carrier is exposed upward, and the lower surface is exposed downward because the lower part of the carrier is open.

As such, when the module IC loaded on the carrier is transferred to the vision unit with the upper and lower portions exposed, vision cameras are installed on the upper and lower portions of the vision unit. The test is conducted by photographing the exterior in a flat manner.

After the vision test of the module IC is completed through the process as described above, the unloading picker picks the module IC loaded in the carrier, selects a good product or a defective product according to the inspection result, and unloads the module IC into the unloading tray.

(Prior art literature)

(Patent Document 0001) Republic of Korea Patent Publication No. 10-1012633 (Registered on Jan. 27, 2011)

(Patent Document 0002) Republic of Korea Patent Publication No. 10-1076741 (Registered on October 19, 2011)

(Patent Document 0003) Republic of Korea Patent Publication No. 10-0724150 (Registered on May 25, 2007)

(Patent Document 0004) Republic of Korea Patent Publication No. 10-2019-0036588 (published on April 5, 2019)

However, the conventional module IC vision test handler has several problems as follows.

First, while moving the module IC to be tested in a carrier, taking a 2D image of the attachment state of the parts, and then manually turning the module IC 180°, the operation rate of expensive equipment will drop.

Second, there is a limit to perfectly maintaining the horizontal state of the module IC contained in the carrier due to the processing tolerance of the carrier and particles. Because it is filmed with a 2D image, a good product is judged as a defective product.

Third, since the vision test of the module IC is performed while the carrier is moving by placing the module IC in a horizontal state, various types of carriers have to be provided whenever the length of the module IC is different.

The present invention has been devised to solve this problem in the prior art, in which the module IC to be vision tested is rotated while clamped to a pair of grippers installed opposite to each other so that the front or back of the board of the module IC faces upward. it has its purpose

Another object of the present invention is to make it possible to finely adjust the rotation angle of the gripper so that the front or rear surface of the board of a module IC to be vision tested can maintain a horizontal state.

Another object of the present invention is to enable the gripper to accurately and quickly detect whether a module IC to be vision tested is clamped by different pressing forces applied to a pair of grippers.

According to the aspect of the present invention for achieving the above object, a first slider is installed on a mounting plate to face each other, and a movable piece and a support block having a single-acting cylinder are installed on each of the first sliders, and the movable piece and support are provided. An elastic member is installed between the blocks to push the movable piece away from the support block when compressed air is not supplied to the single-acting cylinder, and the movable piece has a finger holding the module IC at its tip, a stopper for controlling the amount of rotation, and a rotator. There is provided a module IC reversing device for a module IC test handler, characterized in that a gripper having a cut-out groove to be coupled is rotatably installed and supported by a cap.

The present invention has the following advantages over the prior art.

First, while the board of the module IC clamped to the gripper of the inverting device is kept horizontal, the vision camera shoots a 2D or 3D image of the attachment state of the part to test for defects, thereby maximizing the test efficiency.

Second, by finely adjusting the leveling screws installed on both sides of the cap to correct the contact point of the stopper formed on the gripper, the board of the module IC can always be maintained in a horizontal state, thereby improving test reliability.

Third, the stopper of the gripper is pulled by the magnetic force of the magnet in a state where the module IC is kept horizontal by fixing the magnets on the bottom surfaces of both sides of the cap so that the vision camera is in close contact with the horizontal adjustment screw. This prevents the module IC from moving in advance.

Fourth, since the pair of first sliders are screwed to the ball screw, the pair of first sliders are simultaneously opened or contracted by the driving of the first motor. The module IC can be handled.

1 is a perspective view showing a vision handler to which the present invention is applied;
2 is a perspective view of a state in which the present invention is installed on a turntable;
3 is a perspective view showing an embodiment of the present invention;
4 is an exploded perspective view showing the main part of the present invention;
Figure 5 is a perspective view of the assembled state of Figure 4;
6A is a longitudinal cross-sectional view showing a state in which the rotation angle of the gripper is finely adjusted;
6B is a longitudinal cross-sectional view illustrating a state in which a stopper formed on a gripper is magnetized to a magnet;
7 is a perspective view illustrating a state in which a support block in which a sensor dog is installed is pressed toward a sensor when the module IC is clamped to a pair of grippers;
8 is a perspective view illustrating a state in which a sensor detects a sensor dog installed in a support block when a module IC is clamped to a pair of grippers;
9 is a perspective view showing a state in which the ball plunger is fitted into the positioning groove of the gripper;
10a is a longitudinal cross-sectional view showing the present invention;
Fig. 10b is a plan view of Fig. 10;
11 is a bottom perspective view showing a rotating part;

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein. It is noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and not limiting. In addition, the same reference numerals are used to indicate like features to the same structure, element, or part appearing in two or more drawings.

Figure 2 is a perspective view of the present invention installed on a turntable, Figure 3 is a perspective view showing an embodiment of the present invention, Figure 4 is an exploded perspective view showing the main part of the present invention, the present invention is a turntable 10 or A reversing device 20 is installed on a movable body that reciprocates in a straight line (not shown) to clamp the module IC 30 to be vision tested and rotate 360° at 1, 2, 3 rotating parts 40, 41, 42. After rotating 90° or 180° within the range, the module IC front and rear vision photographing units 50 and 51 display 2D or 3D images of parts attached to both sides (front and back) of the board of the module IC 30 It is possible to test whether the attachment state of the parts is good or defective by taking a video.

At this time, in order to maximize the test efficiency of the expensive vision test handler, it is better to install a plurality (about 4 to 8) of the inverting device 20 on the turntable 10 to maintain a predetermined angle as shown in FIG. 2 . desirable.

However, it is understandable that the module IC 30 clamped to the reversing device 20 may be tested while the reversing device 20 is installed on the movable body that reciprocates in a straight line while the movable body is linearly moved.

In the reversing device 20 of the present invention, as shown in FIGS. 3 to 5 , a pair of first sliders 22 are provided opposite to each other on the mounting plate 21 , and each of the first sliders 22 has compression A single-acting cylinder 23 that operates according to the supply of air is movably installed along the rail 23a, and the movable piece 24 is fixedly installed in the single-acting cylinder 23.

And on one side of the movable piece 24, a support block 25 is fixed to the first slider 22, and between the movable piece 24 and the support block 25, a single-acting cylinder 23 is compressed. An elastic member 26 such as a coil spring for pushing the movable piece 24 from the support block 25 when air is not supplied is installed.

In one embodiment of the present invention, the elastic member 26 on one side of the elastic member 26 installed between each support block 25 and the movable piece 24 has a large elastic modulus, and the elastic member on the other side has a large elastic modulus. 26, the elastic modulus is adjusted to be small, and the sensor dog 27 is fixed to the support block 25 in which the elastic member 26 having a small elastic modulus is installed, and the sensor dog 27 is located on one side of the support block 25 ( A sensor 28 for detecting 27 ) is provided.

This is to prevent the sensor 28 from detecting the sensor dog 27 when the module IC 30 to be vision tested is not loaded in the inversion device 20 of the present invention, or when a loading failure occurs, thereby generating an error so that the operator This is to enable you to take action.

To this end, an insertion hole 29 into which the elastic member 26 is fitted is formed in each of the support blocks 25 and the movable body 24 , and the elastic modulus of the elastic member 26 is formed in the insertion hole 29 . A spring tension adjusting screw 31 to adjust is screwed together.

Accordingly, the elastic modulus of the elastic member 26 is increased by tightening the spring tension adjusting screw 31 located on the left side in the drawing, and the spring tension adjusting screw 31 located on the right side of the drawing is loosened and the elastic modulus of the elastic member 26 is loosened. By making it small, when the module IC 30 is clamped, the movable piece 24 located on the right moves to the right more than the movable piece 24 located on the left.

As shown in FIG. 4, the movable piece 24 has a finger 32a for gripping the module IC 30, a stopper 32b for controlling the rotation amount, and a cutout groove 32c to which the rotator 43 is coupled, as shown in FIG. A gripper 32 is rotatably installed, and the gripper 32 is supported by a cap 33 .

In addition, horizontal adjustment screws 34 for precisely adjusting the rotation angle of the gripper 32 are screwed to both sides of each of the caps 33 as shown in FIG. 6A .

This is by tightening or loosening the leveling screw 34 and adjusting the point where the stopper 32b of the gripper 32 touches the bottom of the leveling screw 34 to precisely adjust the rotation angle of the gripper 32, This is to improve the precision of the vision test by always keeping the front or rear surface of the module IC 30 to be vision tested horizontally facing the upper surface.

In addition, magnets 35 for attaching the stoppers 32b whenever the grippers 32 rotate by 180° are provided on the bottom surfaces of both sides of each cap 33 to be displaced from the horizontal adjustment screw 34 installed on the cap 33, respectively. is fixedly installed.

This causes the stopper 32b formed on the gripper 32 to stick by the magnetic force of the magnet 35 whenever the gripper 32 rotates 90° or 180°, so that the gripper 32 is clamped during the vision test. This is to prevent the module IC 30 from moving minutely.

A gripper 32 rotatably installed on the movable piece 24 is fitted into a pair of bearings 36a and 36b and is supported by a bearing fixing cap 37 .

The reversing device 20 having such a configuration reaches the first, second, and third rotation parts 40, 41, and 42, and as shown in FIG. 11, the rotator 43 is inserted into the incision groove 32c of the gripper 32. As it rotates 90° or 180° in the inserted state, the gripper 32 clamping the module IC 30 rotates together to reverse the module IC 30 .

Positioning grooves 32d are formed in each gripper 32 rotatably installed between the movable piece 24 and the cap 33 as shown in FIG. 9 , and the module IC 30 is provided in each support block 25 . ) in the vertical state, the ball plunger 38 fitted into the positioning groove 32d is screwed and fixed with the headless bolt 39 .

At this time, a metal rod 11 with low hardness, such as brass, is inserted into the lower portion of the hairless bolt 39 so that the metal rod 11 presses the ball plunger 38 by the fastening force of the hairless bolt 39 .

This is to prevent in advance a phenomenon in which the screw thread of the ball plunger 38 is distorted by the pressing force of the headless bolt 39 .

On the other hand, although a pair of first sliders 22 may be fixedly installed on the mounting plate 21, in an embodiment of the present invention, each first slider ( 22) is installed to be movable horizontally along the LM guide 12, and a first ball screw 14 that rotates according to the driving of the motor 13 is screwed to the pair of first sliders 22.

The first ball screw 14 has a right-hand screw 14a on one side and a left-hand screw 14b on the other side with respect to the center. The pair of first sliders 22 are simultaneously opened or closed to adjust the spacing.

This is to enable testing of various types of module ICs 30 having different lengths using one inverting device 20 .

In the present invention, a plurality of inverting devices 20 are provided in a plurality of rows on the first slider 22 installed opposite to the mounting plate 21 as shown in FIG. 3 to improve test efficiency, so that a plurality of module ICs 30 are installed at once. The vision test can be performed while inverting at the same time.

The operation of the present invention will be described as follows.

First, a state in which a plurality (about 4 to 8) of the inverting device 20 of the present invention is installed on a turntable 10 that rotates by a predetermined angle will be described as an example.

In the state in which the module IC 30 to be vision test is not loaded in the reversing device 20 of the present invention, compressed air is supplied to the single-acting cylinder 23 so that a pair of single-acting cylinders 23 are formed on both sides along the rail 23a. Since it is in the open state, each movable piece 24 compresses the elastic member 26 as shown in FIG. 10A.

In this state, when the inverting device 20 is positioned in the loading unit 60 as shown in FIG. 2 , a picker (not shown) picks a plurality of module ICs 30 contained in a loading buffer or carrier (not shown). Therefore, the module IC 30 is positioned between the fingers 32a of the gripper 32 as shown in FIG. 10A, and the module IC 30 to be vision tested is a loading buffer or a carrier. The module IC 30 picked in the picker maintains the vertical state because it is contained in a vertical state.

As described above, after the module IC 30 picked in the picker is vertically positioned between the grippers 32, the supply of compressed air supplied to the single-acting cylinder 23 is stopped, so a pair of movable pieces 24 ) move inwardly along the rails 23a by the restoring force of the elastic member 26, and accordingly, the fingers 32a formed on each gripper 32 move the module IC 30 as shown in FIGS. 7 and 8. ) to grip the side.

When the supply of compressed air to the single-acting cylinder 23 is stopped, each movable piece 24 moves inwardly along the rail 23a by the restoring force of the elastic member 26 so that the fingers 32a of the gripper 32 become the module. When the IC 30 is clamped, the elastic modulus of the elastic member 26 located on the left side in the drawing is set to be larger than the elastic modulus of the elastic member 26 located on the right side, so that the movable piece 24 located on the right side Since it moves to the right more than the movable piece 24 located on the left, the sensor 28 detects the sensor dog 27 fixed to the movable piece 24, and accordingly, the module is attached to the pair of fingers 32a. The controller (not shown) recognizes that the IC 30 is clamped.

However, if the pair of fingers 32a does not clamp the module IC 30 to be vision tested, the support block 25 located on the right side in the drawing moves to the left by the restoring force of the elastic member 26 and moves to the support block ( Since the sensor 28 cannot detect the sensor dog 27 fixed to 25), an error is generated by the control unit (not shown), and the operator is notified of this by a notification means such as a buzzer or a warning light to take action.

After the picker loads the plurality of module ICs 30 to be vision tested by the loading unit 60 into the inverting device 20 and the gripper 32 clamps them, the picker picks the module IC 30 . ), returns to the loading position (not shown) and waits until the next module IC is loaded.

After the inverting device 20 clamps the module IC 30 in the operation as described above, the turntable 10 rotates one step (by 60°), so the inverting device 20 clamping the module IC 30 is It reaches directly below the primary rotating part 40 .

When the reversing device 20 reaches directly below the primary rotation unit 40, the second motor 44 is driven to rotate the second ball screw 45 a set number of times, so a pair of second sliders 46 ) moves inward at the same time so that the rotator 43 is fitted into the cutout groove 32c of the gripper 32 .

In this state, when the rotator 43 installed on the second slider 46 rotates the gripper 32 by 90°, power is transmitted by the power transmission means 48 by driving the third motor 47, and the fingers 32a ), the front surface of the board of the module IC 30 clamped to the gripper 32 faces upward since the stopper 32b formed on one side of the cap 33 comes into contact with the horizontal adjustment screw 34 exposed to the bottom surface of the cap 33 .

At this time, after the stopper 32b comes into contact with the horizontal adjustment screw 34 exposed to the bottom of the cap 33, the magnetic force of the magnet 35 fixed to the cap 33 is applied to the stopper 32b and the stopper 32b). is attached to the magnet 35, so the module IC 30 is prevented from moving in advance when the attachment image of the part attached to the board is captured as a 2D or 3D image in the module IC front vision photographing unit 50, which is a post-process. will do

If the module IC 30 fails to maintain the level in the state where the gripper 32 is rotated 90° due to the above operation and the board faces upward, the module IC front vision photographing unit 50 captures an attached image of the part attached to the board. When shooting a 2D or 3D image, since an error occurs, the module IC 30 rotated by 90° must be adjusted to always maintain a horizontal state by tightening or loosening the horizontal adjustment screw 34 .

After the first rotation unit 40 rotates the module IC 30 by 90°, the second motor 44 is reversely driven, so that the pair of second sliders 46 return to their initial state.

After rotating the module IC 30 clamped to the gripper 32 of the inversion device 20 by 90° and the turntable 10 rotates by a set angle of 60° with the front side of the substrate facing upward, the inversion device ( Since the module IC 30 clamped to the gripper 32 of 20 is located in the module IC front vision photographing unit 50, it is placed on the front surface of the board of the module IC 30 clamped to the gripper 32 of the inverting device 20. The attachment state image of the attached part is taken as a 2D or 3D image and transmitted to the test unit (not shown).

After the module IC front vision photographing unit 50 captures the attachment state image of the component attached to the front of the board of the module IC 30 as a 2D or 3D image and transmits it to the test unit, the turntable 10 rotates one step again. Therefore, the module IC 30 clamped to the gripper 32 of the inverting device 20 is located directly below the secondary rotation unit 41, and in the above-described primary rotation unit 40, the module IC 30 in a vertical state. is rotated 90° to be in a horizontal state, but in the secondary rotation unit 41, the module IC 30 clamped to the gripper 32 is rotated 180° so that the component attached to the rear surface of the substrate faces upward.

As described above, when the part attached to the back of the board of the module IC 30 faces upward, the turntable 10 rotates by one step, so that the module IC 30 clamped to the gripper 32 of the inverting device 20 is the module IC Since it is located directly below the rear vision photographing unit 51, as described above, an image of the attachment state of the component attached to the rear surface of the module IC 30 is photographed as a 2D or 3D image and transmitted to the test unit.

After the module IC rear vision photographing unit 51 takes a 2D or 3D image of the attachment state of the parts attached to the back of the board and transmits it to the test unit, the turntable 10 rotates 1 step to turn the inverting device 20 into 3 As described above, the rotator 43 rotates the gripper 32 by 90° after positioning it directly below the car rotating part 42, so as when the module IC 30 clamped to the gripper 32 is loaded. returned to its initial position.

After that, when the turntable 10 rotates one step, the picker is clamped to the gripper 32 of the inverting device 20 in a state where the vision test completed module IC 30 is positioned in the unloading unit 61 ( 30) is clamped and at the same time the single-acting cylinder 23 is driven to open the pair of movable pieces 24 while compressing the elastic member 26, the module IC 30 in the gripper 32 of the reversing device 20 Since the clamping is released, the picker classifies the module IC 30 as a good product or a bad product and unloads it according to the test result.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential features. will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention described in the above detailed description is indicated by the following claims, meaning and All changes or modifications derived from the scope and its equivalents should be construed as being included in the scope of the present invention.

10: turntable 13: first motor
14: first ball screw 20: reversing device
22: first slider 23: single-acting cylinder
24: movable piece 25: support block
26: elastic member 27: sensor dog
28: sensor 31: spring tension adjusting screw
32: gripper 32a: finger
32b: stopper 32d: positioning groove
33: cap 34: horizontal adjustment screw
35: magnet 38: ball plunger
30: module IC 43: rotator

Claims (6)

The first slider 22 is installed on the mounting plate 21 to face each other, and the movable piece 24 and the support block 25 provided with the single-acting cylinder 23 are installed on each of the first sliders 22 and the support block 25 is installed. An elastic member 26 for pushing the movable piece 24 from the support block 25 when compressed air is not supplied to the single-acting cylinder 23 is installed between the movable piece 24 and the support block 25, , a gripper 32 formed with a finger 32a for gripping the module IC 30, a stopper 32b for controlling the rotation amount, and a cutout groove 32c for coupling the rotator 43 at the distal end of the movable piece 24 ) is rotatably installed and supported by a cap (33).
The method according to claim 1,
Each of the first sliders 22 are installed on the mounting plate 21 to be horizontally movable along the LM guide 12 , and the pair of first sliders 22 rotate according to the driving of the first motor 13 . , A module IC reversing device for a module IC test handler, characterized in that the first ball screw 14 having a right-hand screw 14a on one side and a left-hand screw 14b on the other side is screwed with reference to the center.
The method according to claim 1,
The elastic member 26 on one side of the elastic members 26 installed between each support block 25 and the movable piece 24 has a large elastic modulus, and the elastic member 26 on the other side has a large elastic modulus. is low, and the sensor dog 27 is fixed to the support block 25 in which the elastic member 26 having a low elastic modulus is installed, and a sensor 28 for detecting the sensor dog 27 on one side of the support block 25 . Module IC inversion device of the module IC test handler, characterized in that it is installed.
4. The method according to claim 3,
An insertion hole 29 into which the elastic member 26 is fitted is formed in each of the support blocks 25 , and a spring tension adjusting screw 31 for adjusting the elastic modulus of the elastic member 26 is provided in the insertion hole 29 . Module IC inversion device of module IC test handler, characterized in that it is screwed together.
The method according to claim 1,
A module IC reversing device for a module IC test handler, characterized in that magnets 35 for attaching a stopper 32b are fixed to the bottom surfaces of both sides of each cap 33 whenever the gripper 32 rotates 180°. .
6. The method according to claim 1 or 5,
A module IC characterized in that a horizontal adjustment screw (34) that precisely adjusts the rotation angle of the gripper (32) by adjusting the contact position of the stopper (32b) of the gripper (32) on both sides of each cap (33) is screwed together Module IC inversion device of test handler.

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