KR20040067259A - Defect inspection device for non-metal lead frame - Google Patents

Abstract

PURPOSE: An apparatus for inspecting a nonmetallic lead frame is provided to inspect automatically the nonmetallic lead frame by using a line scan camera, a computer, and an image processing program. CONSTITUTION: An uncoiler(10) is wound around a nonmetallic lead frame(100). A first horizontal device(20) is used for maintaining a horizontal state of the nonmetallic lead frame. A line scan camera(40) is used for photographing images of the nonmetallic lead frame when the horizontal state is maintained by the first horizontal device. A normal state and an abnormal state of the nonmetallic lead frame are decided by using the information of the line scan camera. A second horizontal device(50) is used for maintaining the horizontal state of the nonmetallic lead frame. A sorting device(60) is used for indicating a bad state on a corresponding part of the nonmetallic lead frame. A recoiler(70) is wound around the nonmetallic lead frame. A power unit is used for driving the uncoiler, the first horizontal device, the second horizontal device, and the recoiler.

Description

Non-Metal Lead Frame Inspection System {DEFECT INSPECTION DEVICE FOR NON-METAL LEAD FRAME}

The present invention relates to a non-metal lead frame inspection apparatus, in particular, by continuously and automatically inspect the inspection of the non-metal lead frame using a line scan camera, a computer and an image processing program, by automatically processing punching or ink marking on defective products, To improve the inspection speed and reliability of the inspection results.

In general, nonmetallic lead frames are known in which patterns for semiconductors are printed on flexible PCBs.

1 is a plan view of such a nonmetallic lead frame.

The nonmetallic lead frame 100 shown in this figure is made of a long film form in which a plurality of patterns 102 are repeatedly printed at regular intervals, and holes 104 are continuously drilled at the edges of the nonmetallic lead frame 100 ( It is used to hand material in various processes of manufacturing 100).

The non-metallic lead frame 100 is subjected to scratch or short-circuit inspection of the pattern 102 printed on the surface generated in the manufacturing process, which is performed by visual inspection by an experienced worker. In other words, the pattern 102 is identified by the human eye and compared to the normal pattern 102, the abnormality is treated as bad, and the punched portion of the pattern 102 in the non-metal lead frame 100 with a punch Mark it as defective.

However, in this inspection method, all inspection processes depend on visual identification of the operator, so the inspection speed is slow and there is a high probability of error, and even in the display of defective products, the material characteristics of the non-metallic lead frame 100 are ignored and punched together. There was a problem in that perforation damages the surrounding pattern 102.

The present invention has been made to solve the above problems, the object of the present invention is to continuously and automatically inspect the inspection of the non-metallic lead frame using a line scan camera, a computer and an image processing program, punching or ink in defective products By automatically processing the marking, it is intended to improve the inspection speed and reliability of the inspection results.

1 is a plan view of a typical nonmetallic lead frame.

Figure 2 is a plan view of a non-metallic lead frame inspection apparatus according to an embodiment of the present invention.

3 to 4 is an enlarged view of the main portion of the non-metallic lead frame inspection apparatus shown in FIG.

<Explanation of symbols for main parts of drawing>

10: uncoiler 12: spacer film recoiler

14 spacer film uncoiler 20 first horizontal apparatus

22: first sprocket 24: second sprocket

26: first horizontal holding roller 28: first stage

40: line scan camera 50: second horizontal device

60: sorting device 62: punch

64: nozzle 70: recoiler

80: guide roller 90: spacer film tensioning device

100: non-metallic lead frame 110: spacer film

The present invention for achieving the above object is an uncoiler wound around a non-metallic lead frame wound in a roll form; A first horizontal device which maintains the level of the non-metal lead frame during the movement of the non-metal lead frame released from the uncoiler; One or more line scan cameras for capturing an image of the non-metallic lead frame maintained horizontally by the first horizontal device; An image processing unit which receives information of the line scan camera and determines 'quantity' and 'badness' of the non-metal lead frame; A second horizontal device which maintains the horizontality of the non-metallic lead frame on which the image is captured; A sorting apparatus for marking defective products on corresponding portions of the non-metallic lead frame maintained horizontally by the second horizontal apparatus when the determination result of the image processor is defective; A recoiler wound around the nonmetallic lead frame via the sorting device; And a power unit for driving the recoiler, the first horizontal device, the second horizontal device, and the recoiler.

Hereinafter, a preferred embodiment of the non-metal lead frame inspection apparatus as described above.

2 is a plan view of a non-metal lead frame inspection apparatus according to an embodiment of the present invention, Figures 3 to 4 is an enlarged view of the main portion of the non-metal lead frame inspection apparatus shown in FIG.

In the non-metallic lead frame inspection apparatus shown in this drawing, the uncoiler 10 wound around the rolled nonmetallic lead frame 100 and the nonmetallic lead frame 100 released from the uncoiler 10 are moved. One or more line scan cameras for capturing an image of the first horizontal device 20 that maintains the non-metal lead frame 100 horizontally and the non-metal lead frame 100 that is maintained horizontally by the first horizontal device 20. 40 and the image processing unit for determining the 'quantity' and 'poor' of the non-metal lead frame 100 by receiving the information of the line scan camera 40, and maintain the horizontal of the non-metal lead frame 100, the image is taken If the second horizontal device 50 and the determination result of the image processing unit is bad, the sorting device 60 to mark the defective part on the corresponding portion of the non-metallic lead frame 100 which is kept horizontal by the second horizontal device 50. ) And the non-metallic lead frame 100 via the sorting device 60 The recoiler 70, the power unit for driving the recoiler 70, the first horizontal device 20, the second horizontal device 50 and the recoiler 70, the spacer film recoiler 12 and It consists of a spacer film uncoiler 14.

The uncoiler 10 and the recoiler 70 are fixed on the reel 160 to which the nonmetallic lead frame 100 is wound, the support plate 162 fixed at a constant height from the vertical base, and the support plate 162. A motor 164 installed and driven by a power unit, a shaft 166 rotated by the motor 164, coupled to the center of the supply reel 160, and having a plurality of grooves 168 formed on the outer circumferential surface of the tip region; The elastic plate 172 is elastically supported on the first compression spring 170 on the support plate 162 to push the supply reel 160 outward from the support plate 162, and the shaft 166 passes through the supply reel 160. Chuck to support the supply reel 160 on the surface opposite to the contact plate 172 and the second compression spring 176 in the chuck 174 to be elastically supported in the groove 168 It consists of a pin 178 to be coupled.

The number of the line scan camera 40 is determined according to the number of items to be inspected.

The first horizontal device 20 and the second horizontal device 50 pass through the first sprocket 22 and the first sprocket 22 which apply torque in the reverse direction of the movement direction of the nonmetallic lead frame 100. Non-metallic lead frame 100 between second sprocket 24 for torqueing non-metallic lead frame 100 in a direction opposite to first sprocket 22 and non-metallic lead frame 100 between first sprocket 22 and second sprocket 24. It consists of a plurality of first horizontal holding rollers 26 to keep the bottom of the horizontal and a guide block 28 for fixing the first horizontal holding rollers 26 to take an image for inspection there.

In particular, the second horizontal device 50 is a device for horizontally maintaining the bottom surface of the non-metallic lead frame 100 between the first sprocket 22 and the second sprocket 24, where the punching and pen marking functions are performed. to be.

In addition, the first array sensor 30 measuring the degree of deflection of the non-metallic lead frame 100 moving through the first horizontal device 20 to the second horizontal device 50 and transmitting the measured value to the controller for controlling the power unit. Is provided. In addition, the second array sensor 32 for measuring the degree of deflection of the moving non-metallic lead frame 100 that moves to the recoiler 70 through the second horizontal device 50 and transmits the measured value to the control unit for controlling the power unit. Is provided. Accordingly, the control unit controls the driving speed of the recoiler 70, the first horizontal device 20, the second horizontal device 50, and the recoiler 70 so that the deflection of the nonmetallic lead frame 100 is appropriate. .

On the other hand, the sorting device 60 includes a punch 62 for drilling holes in the nonmetal lead frame 100, a pen marking 64 for dot marking the nonmetal lead frame 100, and a punch 62 for the nonmetal lead. And a drive table 66 for moving to the marking position of the frame 100.

In addition, the first guide roller 90 which changes the direction of the nonmetallic lead frame 100 and the spacer film tensioning device 90 which gives a tension to the spacer film 110 are wound on the movement path of the nonmetallic lead frame 100. Etc.

In FIG. 2, the uncoiler 10 and the recoiler 70 may rotate in both directions, and thus the movement paths of the nonmetallic lead frame 100 and the spacer film 110 are illustrated.

On the other hand, the power unit, the first sprocket 22 and the second sprocket 24 of the first horizontal device 20 is the servo motor recoiler 70, the uncoiler 10 and the spacer film recoiler 12, the spacer film It is a speed control motor which rotates the uncoiler 14.

Hereinafter will be described the operation of the non-metallic lead frame inspection device having the configuration as described above.

First, when the patterns constituting the semiconductor on the flexible PC ratio are wound around the film type non-metal lead frame 100 and the non-metal lead frame 100 which are continuously formed at a predetermined interval, the patterns are prevented from contacting each other and being damaged. In order to roll the spacer film 110 together in a roll form. The nonmetallic lead frame 100 of this roll form is installed in the uncoiler 10. As shown in FIG.

Then, the power unit is controlled to drive the recoiler 70, the first horizontal device 20, the second horizontal device 50, and the recoiler 70.

The first sprocket 22 of the first horizontal device 20 applies a torque in a reverse direction of the moving direction of the nonmetallic lead frame 100, and the second sprocket 24 has a nonmetallic lead frame via the first sprocket 22. Torque the 100 to the first sprocket 22 in the opposite direction. Therefore, the nonmetallic lead frame 100 is pulled from both sides and is stretched out. In addition, the first horizontal holding roller 26 fixed to the first stage 28 installed between the first sprocket 22 and the second sprocket 24 maintains the bottom surface of the nonmetallic lead frame 100 horizontally. .

In this state, the line scan camera 40 captures an image of the non-metallic lead frame 100. When the nonmetallic lead frame 100 moves continuously, the line scan camera 40 continuously photographs an image of the nonmetallic lead frame 100.

The image of the non-metallic lead frame 100 photographed by the line scan camera 40 is transmitted to the image processing unit, and the image processing unit detects the pattern block in the continuous super-image and performs the inspection on the pattern block. The amount and defect of the frame 100 are determined.

When detecting the pattern block, the standard test object is calculated by calculating the brightness distribution of a plurality of cells through a scan line for each scan line, and then a brightness distribution graph shown as a continuous graph is generated according to the calculated scan order to correspond to the standard test object. After learning to store the brightness distribution graph, the image of the non-metallic lead frame is acquired and at the same time, the area of the image that is identical to the brightness distribution of the standard specimen is found and the area is examined.

The number of line scan cameras 40 used is determined according to the number of inspection items for the inspection object and the resolution of the camera.

On the other hand, the first sprocket 22 of the second horizontal device 50 applies the torque in the reverse direction of the movement direction of the non-metal lead frame 100, the second sprocket 24 is the non-metal via the first sprocket 32 Torque the lead frame 100 in a direction opposite to the first sprocket 22. Therefore, the nonmetallic lead frame 100 is pulled from both sides and is stretched out. In addition, the second horizontal holding device 50 installed between the first sprocket 22 and the second sprocket 24 maintains the bottom surface of the nonmetallic lead frame 100 horizontally.

In addition, the sorting apparatus 60 operates the punch 62 to punch a portion of the non-metal lead frame 100 having a pattern determined to be defective according to the processing result of the image processor, or sprays ink by operating the nozzle 64. Mark the defective product. Selection of the punch 62 or the nozzle 64 depends on the properties of the material of the nonmetallic lead frame 100.

The nonmetallic lead frame 100 that has passed through the second horizontal device 50 is wound around the recoiler 70.

On the other hand, the spacer film 110 uncoiled by the uncoiler 10 is moved in a different path from the non-metallic lead frame 100 by the spacer film tensioning device 90, and the spacer film 110 is stably held by the spacer film tensioning device 90. 110 is wound.

As described above, in the present invention, the uncoiler 10 wound with the nonmetallic lead frame 100, the first horizontal device 20 and the second horizontal device 50 for maintaining the horizontality of the nonmetallic lead frame 100. And determining the quantity and defect of the non-metal lead frame 100 based on the information of the at least one line scan camera 40 and the line scan camera 40 that captures an image of the non-metal lead frame 100. The image processing unit, the sorting device 60 which displays defective products on the corresponding portion of the non-metal lead frame 100, and the non-metal lead frame 100 via the sorting device 60 when the determination result of the image processing unit is poor. A non-metallic lead frame inspection device comprising a recoiler (70), a recoiler (70), a first horizontal device (20), a second horizontal device (50), and a power unit for driving the recoiler (70). Non-metallic lead frame 100 by camera 40, computer and image processing program Auditing is continuously and automatically performed, and the marking of defective parts is processed by punching or ink marking in consideration of the characteristics of the non-metallic lead frame 100, thereby improving the inspection speed and the reliability of the inspection results.

In the above, the present invention has been described as an embodiment, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described claims, and has a general knowledge in the field of the present invention without departing from the gist of the present invention. Anyone who grows up will be able to make various variations.

Claims (6)

An uncoiler 10 wound around a non-metallic lead frame 100 wound in a roll shape; A first horizontal device (20) which maintains the horizontality of the nonmetallic lead frame (100) during the movement of the nonmetallic lead frame (100) released from the uncoiler (10); One or more line scan cameras 40 for capturing an image of the non-metallic lead frame 100 held horizontally by the first horizontal device 20; An image processing unit which receives information of the line scan camera 40 and determines 'quantity' and 'badness' of the non-metal lead frame 100; A second horizontal device (50) which maintains the horizontality of the nonmetallic lead frame (100) on which an image is taken; A sorting device (60) for displaying a defective product on a corresponding portion of the non-metallic lead frame (100) maintained horizontally by the second horizontal device (50) when the determination result of the image processor is bad; A recoiler 70 winding the non-metallic lead frame 100 via the sorting device 60; And And a power unit for driving the uncoiler 10, the first horizontal device 20, the second horizontal device 50, and the recoiler 70. . The method of claim 1, wherein the uncoiler 10 and the recoiler 70, A reel 160 to which the nonmetallic lead frame 100 and the spacer film 110 are wound; A support plate 162 fixed at a constant height from the bottom; A motor 164 fixedly installed on the support plate 162 and driven by the power unit; A shaft 166 rotated by the motor 164, coupled to the center of the supply reel 160, and having a plurality of grooves 168 formed on an outer circumferential surface of the tip region; An adhesive plate 172 elastically supported by the first compression spring 170 on the support plate 162 to push the supply reel 160 outward from the support plate 162; A chuck 174 coupled to the shaft 166 passing through the supply reel 160 to support the supply reel 160 at a surface facing the contact plate 172; And And a pin (178) elastically supported by the second compression spring (176) in the chuck (174) and coupled to the groove (168). The method of claim 1, wherein the first horizontal device 20 and the second horizontal device 50, A first sprocket (22) for applying torque in a reverse direction of the movement direction of the nonmetallic lead frame (100); A second sprocket (24) for applying a torque to the non-metallic lead frame (100) via the first sprocket (22) in a direction opposite to the first sprocket (22); A plurality of first horizontal holding rollers 26 which horizontally maintain a bottom surface of the non-metallic lead frame 100 between the first sprocket 22 and the second sprocket 24; And And a first stage (28) for fixing the first horizontal holding roller (26). The method of claim 1, wherein the sorting device 60, A punch 62 for drilling holes in the non-metal lead frame 100; A pen marking 64 for performing dot marking on the non-metal lead frame 100; And And a drive table (66) for moving the punch (62) and the pen marking (64) to the marking position of the non-metal lead frame (100). The method of claim 1, wherein the non-metallic lead frame inspection device, And a spacer film tension device (90) for changing the direction of movement of the nonmetallic lead frame (100) and simultaneously maintaining the tension of the spacer film (110). The method of claim 1, wherein the degree of deflection of the non-metallic lead frame 100 moving through the first horizontal device 20 to the second horizontal device 50 is measured to transmit a measurement value to the control unit for controlling the power unit. A first array sensor 30; And A second array sensor 32 measuring a deflection degree of the non-metallic lead frame 100 that moves to the recoiler 70 after passing through the second horizontal device 50 and transferring the measured value to the controller; Non-metallic semiconductor material inspection device characterized in that the provided.