KR100395426B1 - Form defect inspection device of pcb for ic using 2 boat - Google Patents

Abstract

The present invention is to reduce the manufacturing cost of the inspection equipment by inspecting both sides of the PC for the PC using one CD camera. The present invention for this purpose, the first boat 110 and the second boat 120, the first boat 110 and the first boat 110 is installed so as to be movable on the base 100 is fixed to the PC 300 CDper 300 for moving the PC 300 for the PC upside down between the two boats 120 and the CD installed so as to be movable above the second boat 120 from above the first boat 110. Two boats consisting of a camera 200 and an illumination device 202, and an image processing unit for determining the 'quantity' and 'badness' of the quality of the PCC 300 for the image from the image captured by the CD camera 200 As a PCB shape defect inspection device for using, since only one camera 200 can be inspected on both sides of the PCB 300, there is an effect that can reduce the manufacturing cost of the inspection device. .

Description

FORM DEFECT INSPECTION DEVICE OF PCB FOR IC USING 2 BOAT}

The present invention is to reduce the manufacturing cost of the inspection equipment by inspecting both sides of the PCB for the PC-PC defect shape using two boats, in particular one CD camera.

ICs for PCs are BGA, CSP, MCM, etc. Currently, various types of systems for examining their shapes using digital cameras have been developed.

One example currently used as such an inspection apparatus is shown in FIG. 2 is a plan view of the inspection apparatus shown in FIG.

The inspection apparatus includes a pair of CDs for photographing the rails 20 serving as guides so as to transport the PCs 10 for inspection, and the PCs 10 for the upper and lower sides of the rails 20, respectively. CCD) cameras 30 and 32, illumination devices 40 and 42 for illuminating each side of the PC 10 for the PC under each of the CD cameras 30 and 32, and CD cameras 30 and 32. And an image processing unit (not shown) for reading out whether the PC 10 of the PC is defective from the image photographed at.

The inspection apparatus is provided with a gripper (not shown) for holding the PC 10 for the IC and then moving it in the X-axis direction along the rail 20 to move to the inspection regions of the CD cameras 30 and 32.

Such a PCB shape defect inspection device is a gripper grips the PCB 10 for gripper and moves along the rail 20 in the X-axis direction of FIG. 1 to move into the inspection area of the CD cameras 30 and 32. To stop. Then, when the upper and lower CD cameras 30 and 32 photograph the upper and lower surfaces of the PC 10 for the IC, and transmits the images to the image processing unit, the PC 10 is generated from the image of the PC 10 captured by the image processing unit. By checking the short-circuit or scratch state, the good or bad of the PC 10 for the IC is determined.

On the other hand, an example of another inspection apparatus currently in use is shown in FIG. 4 is a cross-sectional view of the inspection apparatus shown in FIG.

The inspection apparatus includes a boat 22 for carrying and conveying a PCC 10 for inspection, a linear guide 23 for allowing the boat 22 to move in a horizontal direction (X-axis direction in FIG. 2), A pair of images of the server motor 24 for driving the boat 22, the screw 25 for transmitting the power of the server motor 24, and the PCC 10 for the upper and lower portions of the boat 22, respectively. CD cameras 30 and 32, lighting devices 40 and 42 for illuminating each side of the PC 10 under the CD cameras 30 and 32, and CD cameras 30 and 32. It comprises an image processing unit (not shown) for reading out whether the PC 10 for the IC from the image taken in the).

In this PCC shape defect inspection apparatus, the PCB 10 for the IC is fixed on the boat 22, and the entire boat 22 is moved into the inspection area of the CD cameras 30 and 32. When the upper and lower surfaces of the PCs 10 of the PCs are photographed by the CD cameras 30 and 32 and transmitted to the image processing unit, a short circuit generated in the PCs 10 of the PCs from the image of the PCs 10 of the PCs photographed by the image processing unit. In addition, the scratch state is inspected to determine whether the IC 10 of the IC is good or bad.

This inspection device has a large stability because the PC 22 for moving the boat 22 does not move directly.

However, since the two types of inspection apparatuses require cameras 30 and 32 for inspecting the upper and lower surfaces of the PCB 10 for the IC, there is a high manufacturing cost of the inspection apparatus.

The present invention has been made to solve the above problems, an object of the present invention is to maintain a single CD camera while maintaining the same or superior performance in terms of speed and the device installed separately the existing top / bottom camera In order to reduce the manufacturing cost of the inspection equipment by inspecting both sides of the PC for use.

1 is a schematic diagram showing an example of a conventional PC-shaped defect inspection apparatus for IC.

2 is a plan view of the inspection apparatus shown in FIG.

Figure 3 is a schematic diagram showing another example of a conventional PC shape defect inspection device for IC.

4 is a plan view of the inspection apparatus shown in FIG.

Figure 5 is a schematic diagram showing an embodiment of the PCB shape defect inspection apparatus for the IC according to the present invention.

6 is a plan view of the inspection apparatus shown in FIG.

7 is a plan view of the boat shown in FIG.

8 is a cross-sectional view taken along the line A-A of FIG.

9 is a cross-sectional view showing the action of the boat shown in FIG.

FIG. 10 is a front view of the preper shown in FIG. 6. FIG.

FIG. 11 is a plan view of the preper shown in FIG. 10. FIG.

12 is a comparison chart of the inspection time between the conventional inspection device and the inspection device according to the present invention.

<Explanation of symbols for main parts of drawing>

100: base 110: first boat

120: second boat 130: box body

132: top plate 134: long groove

140: server motor 142: screw shaft

144: holder 146: the first air cylinder

148: support 150: first clamper

152: second air cylinder 154: hinge shaft portion

156: second clamper 158: link

160: Prefer 170: Support

180: air chuck 182: third air cylinder

184: Gripper 190: Fourth Actuator

200: CD camera 210: first computer

220: second computer 230: third computer

240: defective box 250: good quality conveyor

270: first actuator 280: second actuator

290: third actuator 300: PC cost IC

The present invention for achieving the above object, the first boat is installed on the base so as to be movable in the X-axis direction, the first boat for fixing the bottom and side of the PCC for the IC; A second boat spaced apart from the first boat by a second actuator on the base to be movable in the X-axis direction by a second actuator, and fixing the bottom and side surfaces of the PCB for the IC; A preper fixedly installed on the base between the first boat and the second boat, and gripping the PCB for moving the IC from the first boat to the second boat; A CD camera installed to be movable in the Y-axis direction in a movable region of the first boat and the second boat by a third actuator; An illumination device moving together with the CD camera from below the CD camera; And an image processing unit for determining the 'quantity' and 'defect' of the quality of the PC for the PC from the image photographed by the CD camera.

Hereinafter, a preferred embodiment of the present invention as described above.

FIG. 5 is a schematic view showing an embodiment of an IC-type defect inspection apparatus for an IC according to the present invention, and FIG. 6 is a plan view of the inspection apparatus illustrated in FIG. 5.

As shown in the figure, the PC shape defect inspection apparatus for the IC of this embodiment is installed on the base 100 so as to be movable in the X-axis direction by the first actuator 170, and the bottom surface of the PCC 300 for the IC is shown. And first boat 110 for fixing the side; A second spaced apart from the first boat 110 on the base 100 by a second actuator 280 so as to be movable in the X-axis direction, the second fixing the bottom and side of the PC 300 for the IC 300 Boat 120; It is fixed to the base 100 between the first boat 110 and the second boat 120, and grips the PC 300 for the IC to move from the first boat 110 to the second boat 120. Flipper 160; A CD camera 200 installed to be movable in the Y-axis direction in the movable area of the first boat 110 and the second boat 120 by the third actuator 290; An illumination device 202 moving together with the CD camera 200 under the CD camera 200; And an image processing unit for determining the 'quantity' and 'poorness' of the quality of the PCB 300 from the image photographed by the CD camera 200.

FIG. 7 is a plan view of the boat shown in FIG. 6, FIG. 8 is a cross-sectional view taken along the line A-A of FIG. 7, and FIG. 9 is a cross-sectional view showing the action of the boat shown in FIG. 7.

The first boat 110 and the second boat 120 has a box body 130 having a flat top plate 132 having a plurality of long grooves 134 formed in the Y-axis direction, and the inside of the box body 130. The server motor 140 installed in the, and the screw shaft 142 connected to the server motor 140 to transmit the rotational movement, and the rotational movement of the screw shaft 142 to the linear motion toward the prefer 160 And a first air cylinder 146 supported on the holder 144 to move forward and backward toward the preper 160 and to be elevated in the Z direction through the long groove 134. 1 is fixed to the air cylinder 146 and the widthwise alignment of the PC 300 for the PC by the portion protruded to the upper plate 132 through the four long grooves 134 during the linear movement of the left and right of the fixing table 144 The support 148 and the support 148 are fixed to the support 148 so that the first air cylinder 146 can be lifted and lifted in the Z direction to lift the PC. A first clamper 150 for contacting and fixing the upper surface of the 300, a second air cylinder 152 fixed on the box body 130 to move up and down in the Z-axis direction, and a lower side of the upper plate 132. A second clamper 156 fixed to the hinge shaft portion 154, the hinge shaft portion 154 hingedly coupled to and contacted and fixed to the PCC 300 positioned on the upper plate 132, and a second air cylinder And a link 158 connecting the 152 and the second clamper 156 to each other.

FIG. 10 is a front view of the preper shown in FIG. 6, and FIG. 11 is a plan view of the preper shown in FIG. 10.

The preper 160 includes a support 170 fixed to the base 100 in a center region between the first boat 110 and the second boat 120, and the first boat 110 on the support 170. Air chuck 180 installed on the second boat 120 side from the side and chucking the PCB 300 for the IC, and installed on the support 170 to rotate the air chuck 180 for the PCC 300 The fourth actuator 190 to move the first boat 110 to the second boat 120 while inverting).

The air chuck 180 includes a third air cylinder 182 fixed to the fourth actuator 190, and a pair of symmetric grippers 184 collected and spread by the third air cylinder 182.

On the other hand, the image processing unit, the first computer 210 to determine the 'quantity' and 'bad' by examining the image of the top of the PC for 300, and the image of the bottom of the PC for 300 Switch device that sequentially connects the CD camera 200 between the second computer 220 and the first computer 210 and the second computer 220 to determine the amount and defect. Not shown), the first computer 210, the second computer 220, the switch device, the server motor 14, the first air cylinder 146, the second air cylinder 152 and the third air cylinder 182 ) And a third computer 230 for controlling the first actuator 270, the second actuator 280, the third actuator 290, and the fourth actuator 190.

Hereinafter, the operation of the PCB shape defect inspection device for the IC having the configuration as described above will be described.

First, by using a separate vacuum suction device, not shown, to pick up about four places on the PC 300 of the target to be examined to move to the top plate 132 of the box body 130 of the first boat 110 When seated, a plurality of first air cylinders 146 supported on the fixing stand 144 moves toward the preper 160 and is moved by the support 148 protruding from the long groove 134 to the outside of the upper plate 132. The PC 300 is pushed against one side of the upper plate 132 having the second clamper 156 to be in close contact. Subsequently, when the first air cylinder 146 descends, the first clamper 150 descends through each of the long grooves 134 to contact and fix one edge of the PCC 300 under the first clamper 150. Let's do it.

Then, when the third air cylinder 158 operates to pull the link 158 downward, the link 158 pivots the second clamper 156 supported by the hinge shaft portion 154 so that the PC 300 of the PC 300 can be rotated. Press the edge to lock it in place.

As described above, the PCB 300 for the IC is fixed to both sides by the first clamper 150 and the second clamper 156.

Subsequently, the first actuator 270 moves the first boat 110 in the X-axis direction so that the entire first boat 110 is moved below the CD camera 200.

When the PCB 300 is positioned below the CD camera 200, the lighting device 202 illuminates the top surface of the PCB 300, and the CD camera 200 is connected to the PCB 300. The image of the upper surface of the photographed and transmitted to the first computer (210). The first computer 210 performs an inspection process after acquiring an image.

As described above, when the image capturing of the top surface of the PC 300 of the PC from the CD camera 200 is finished, the CD camera 200 and the lighting device 202 are moved in the Y-axis direction by the third actuator 290. It moves and waits at the shooting position of the lower surface of the PC for 300.

At the same time, the first boat 110, which has been photographed on the upper surface of the PC 300 for the IC, is moved back to its original position by the first actuator 270. When the first boat 110 moves to the original position, the first air cylinder 146, the support 148, and the third air cylinder 158 operate in the reverse direction to the first, and thus the first clamper 150 and the second clamper ( 156 is separated from the upper surface of the PCC 300 for the IC.

Subsequently, the third air cylinder 182 of the preper 160 operates to collect a pair of grippers 184 to grip the PC 300 for the IC, and the fourth actuator 190 opens the third air cylinder 182. By rotating, the PCB 300 for the IC is seated on the top plate 132 of the second boat 120. As described above, when the prefer 160 rotates the PCB 300 for the IC from the first boat 110 to the second boat 120, the PCB 300 for the IC is turned upside down and the bottom which is not inspected again is returned. It becomes the upper surface.

When the PC 300 for the IC 300 is seated on the top plate 132 of the second boat 120, the second boat 120 undergoes the same process as that of the first boat 110 described above. It is fixed and moved to the CD camera 200 side.

The CD camera 200 moves from the position of the first boat 110 to the position of the second boat 120 and waits, and when the PC 300 of the IC arrives downward, the IC is used in the same manner as described above. Photograph the other side of the PC 300.

The photographed image is sent to the second computer 220, and the second computer 220 acquires the photographed image and inspects the quality.

Subsequently, the third computer 230 according to the inspection result of both sides of the PCC 300 inspected by the first computer 210 and the second computer 220, if it is 'sheep' and sends it to the goods conveyor 250 If, 'bad' is sent to the defective box 240. At this time, using a separate vacuum suction device to pick up and move about four places on the PC 300 for the IC.

On the other hand, while the PC 300 for the IC 300 is seated on the second boat 120 while the image is taken, the new PC 300 for the first boat 110 is seated and the inspection process proceeds as described above. do.

12 is a chart comparing the inspection time between the conventional inspection device and the inspection device according to the present invention.

In the conventional inspection apparatus, as shown in the chart at the top of Figure 12, even if the two PC cameras to shoot both sides of the PC for PC, one computer must acquire each image, inspect and determine, so the inspection time is It takes a long time.

However, the inspection apparatus of the present embodiment, as shown in the chart shown at the bottom of Figure 12, the image obtained on one side of the PC 300 of the PC 300 taken from a single CD camera 200 and the first computer 210 During the inspection, since the CD camera 200 captures an image of the other side of the PC 300 for the IC and acquires the image from the second computer 220 and performs the inspection, the speed is higher than that of the conventional inspection apparatus. It can be the same or faster.

As described above, the present invention, the first boat 110 and the second boat 120 and the first boat 110 is installed to be movable on the base 100 is fixed to the PC 300 for the IC CC installed to move the PC 300 for the IC between each other and the second boat 120 and the CC installed so as to be movable above the second boat 120 from above the first boat 110. D camera 200 and the lighting device 202, and the image processing unit for determining the 'quantity' and 'bad' of the quality of the PC 300 for the PC from the image captured by the CD camera 200 As a PCB shape defect inspection device using a boat, the inspection of both sides of the PCB 300 can be performed using only one camera 200, thereby reducing the manufacturing cost of the inspection device. have.

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 embodiments, and has a general knowledge in the field to which the present invention pertains without departing from the gist of the present invention. Anyone who grows up will be able to make various variations.

Claims (5)

A first boat 110 installed on the base 100 so as to be movable in the X-axis direction by the first actuator 270 and fixing the bottom and side surfaces of the PC 300 for the IC; A second spaced apart from the first boat 110 on the base 100 so as to be movable in the X-axis direction by a second actuator, and fixing the bottom and side surfaces of the PC 300 for the IC 300; Boat 120; It is fixedly installed on the base 100 between the first boat 110 and the second boat 120, and grips the PC 300 for the IC to grip the second boat from the first boat 110. A preper 160 moving to 120; A CD camera (200) installed by a third actuator (290) so as to be movable in the Y-axis direction within the movable areas of the first boat (110) and the second boat (120); An illumination device 202 moving together with the CD camera 200 under the CD camera 200; And The image processing unit for determining the 'quantity' and 'poor' of the quality for the PCC 300 for the IC from the image taken by the CD camera 200; PC shape defect inspection device. The method of claim 1, wherein the first boat 110 and the second boat 120, A box body 130 having a flat top plate 132 having a plurality of long grooves 134 formed in a Y-axis direction; A server motor 140 installed inside the box body 130; A screw shaft 142 connected to the server motor 140 to transmit a rotational motion; Fixing rod (144) having a screw nut that can change the rotational movement of the screw shaft 142 to a linear movement toward the preper 160; A first air cylinder 146 supported on the holder 144 to move back and forth toward the preper 160 and to be elevated in the Z direction through the long groove 134; The width of the PC 300 for the IC by the portion fixed to the first air cylinder 146 and protruded to the upper plate 132 through the long groove 134 during the left and right linear movement of the holder 144 Support 148 to align alignment; A first clamper 150 fixed to the support 148 to lift the first air cylinder 146 ascending and descending in the Z-direction to contact and fix the upper surface of the PC 300 for the IC; A second air cylinder 152 fixed on the box body 130 to move up and down in the Z-axis direction; A hinge shaft portion 154 fixed below the edge of the upper plate 132; A second clamper 156 coupled to the hinge shaft portion 154 by a hinge pivot and fixed to a PCC 300 positioned on the upper plate 132 in contact with the hinge shaft 154; And a second air cylinder (152) and a link (158) for connecting the second clamper (156) to each other. The method according to claim 1, wherein the preper 160, a support (170) fixed to the base 100 in the center region between the first boat 110 and the second boat (120); An air chuck 180 installed rotatably from the first boat 110 side to the second boat 120 side on the support 170 and chucking the PCB 300 for the IC; And And a fourth actuator (190) installed on the support (170) for rotating the air chuck (180). The air chuck (180) of claim 3, further comprising: a third air cylinder (182) fixed to the fourth actuator (190); And And a pair of symmetric grippers (184) that are collected and spread by the third air cylinder (182). The apparatus of claim 1, wherein the image processor comprises: a first computer 210 which determines an amount and a defect by inspecting an image of an upper surface of the PC 300; A second computer 220 which examines an image of the bottom of the PC 300 for determining the quantity and the defect; A switch device for sequentially connecting the CD camera 200 between the first computer 210 and the second computer 220; And The first computer 210, the second computer 220, the switch device, the server motor 14, the first boat 110, the second boat 120, and the Third computer 230 for controlling the preper 160, the first actuator 270, the second actuator 280, the third actuator 290, and the fourth actuator 190, respectively. PCB shape defect inspection device using the two boats, characterized in that comprises a).