KR20040056389A - Measuring apparatus and measuring method for ic-chip shield - Google Patents

Abstract

PURPOSE: An apparatus for inspecting a shield for an IC of a PCB and an inspecting method thereof are provided to reduce errors by using a camera measurement device and a laser beam source. CONSTITUTION: A shield induction conveyer(100) is used for receiving a completed shield from a shield assembly unit. A horizontal transfer unit(200) is formed with a horizontal transfer bar, a horizontal transfer part, a plurality of camera measurement devices, and a discharging device. A transfer switch unit(300) is formed with a horizontal stopper for stopping a horizontal transfer operation and a push bar for moving the stopped shield. A vertical transfer unit(400) is formed with a vertical transfer bar, a vertical transfer part, a plurality of camera measurement devices, and a discharging device. A bottom measurement unit(500) is installed at one or more of the horizontal transfer unit and the vertical transfer unit.

Description

Shield inspection device for IC element of circuit board and inspection method {MEASURING APPARATUS AND MEASURING METHOD FOR IC-CHIP SHIELD}

The present invention relates to a shield inspection apparatus and an inspection method for an IC device of a circuit board, and more particularly, the shield is composed of a lead and a frame, and the horizontality of lower contact portions provided along the edge of the frame is simpler and faster. I want to measure accurately, but it is characteristic

The shield for IC devices on a circuit board is used to shield magnetic field interference generated between adjacent IC devices and IC devices by covering the upper portions of IC devices implanted on the circuit board in products such as mobile communication terminals. By using it, you can prevent noise and improve call performance.

As shown in FIG. 1, the shield S includes a lead L and a frame F assembled therein. When the shield S is assembled on the circuit board PCB, the shield S is formed on the circuit board. It is adhered by placing and soldering onto the solder (Pb) that is buried in advance. The most important point is that all the contact parts S1 on the bottom of the frame F must be completely soldered together, and the tolerance thereof is approximately When larger than 0.1mm, it is treated as bad.

Therefore, in order for all the contacts S1 to be completely soldered onto the circuit board as described above, the lead L and the frame F should not be twisted or lifted. The shield must be screened out.

As described above, conventional inspection methods for inspecting the good or bad of shields include visual inspection and a method using light.

First, the visual inspection is to place the contact portion of the shield down on the surface plate or glass plate, visually inspect whether there is any excitation, and then measure the excitation by inserting a gap gauge.

In another method, the shield (S) is passed between two glass plates fixed at an arbitrary height, thereby selecting a good product that passes and a defective product that does not pass.

However, these conventional inspection methods are very unreasonable because they require a lot of manpower and time, and are not error-prone and uniform.

Therefore, in recent years, the method of using light to increase productivity and reduce measurement error has begun.

That is, after providing a hole in the center of the measuring plate for placing the shield (S), by placing a light source therein to measure the light leaking out, all the contact (S1) touches the bottom of the measuring plate to light If it does not leak, it is good, and if the light leaks despite the contact portion (S1) was treated as bad.

In this case, however, measurements must be made using cameras or vision from all directions, which is cumbersome and difficult to sort automatically for selected good or defective products, especially when there is a contact in the inner center of the shield. There is no point because there is not.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and solved and solved. The main object of the present invention is to use all the contact portions of the shield to be continuously supplied by inspecting the light source and the camera installed on the outside of the shield, In order to obtain accurate inspection results and to quantify the error value of the measured result by the number of pixels, on the other hand, to measure the transverse section and the contact parts on the left and right sides to measure the front and rear contacts. It consists of a vertical transfer section for measuring and a bottom measuring section for measuring internal contact, so that all parts can be measured simultaneously while moving the shield to the minimum distance. It is easy to adjust the position of the, so that even if the size or shape of the shield changes Here it is to raise a shout.

Characteristic means of the present invention for achieving the above object is a shield introduction conveyor for receiving the completed shield from the shield assembly apparatus in a normal position; Horizontal feeder for measuring the front and rear of the shield introduced from the shield introduction conveyor, horizontal transfer means for transferring along the horizontal feeder, and at least one camera measuring means installed in the front and rear direction of the horizontal transfer means 1, and a horizontal transfer unit including a discharge means 1 for discharging the defective shield; A transfer switching unit for transferring the shield after measuring the front and rear surfaces from the horizontal transfer unit to a next measuring step, so as to move in a direction perpendicular to the shielding unit; Vertical feeder for measuring the left and right sides of the shield introduced from the transfer switching unit, longitudinal transfer means for transferring along the longitudinal transfer zone, and at least one camera measuring means installed on the left and right sides of the longitudinal transfer means 2 And, vertical transfer unit including a discharge means for discharging the bad shield 2; The bottom measuring device provided in any one of the above-mentioned horizontal conveying part or vertical conveying part; is configured to pass in sequence so that the moving section and the measuring time of the shield to be measured are made as short as possible, and the cost of the camera is reduced by minimizing the installation of the measuring means. It is to increase productivity.

1 is an exemplary view of a shield

2 is a state of use of the shield

Figure 3 is an overall layout of the inspection device of the present invention is installed

4 is a plan view showing the inspection device of the present invention

5 is a front view showing the inspection device of the present invention

6 is a right side view showing the inspection device of the present invention;

Figure 7 is a side view showing the camera measuring means installed in the horizontal transfer unit of the present invention

Figure 8 is a side view showing the camera measuring means installed in the vertical transfer unit of the present invention

9 is a side view showing the configuration of the bottom measuring instrument of the present invention

10 is a side view showing the discharge means of the present invention

11 is a flow chart (plan) for explaining the inspection process of the present invention

12 is an illustration of a measurement state by the camera measuring means of the present invention

<Code Description of Main Parts of Drawing>

100: conveyor 200: horizontal transfer unit

210: horizontal transport means 211: horizontal transport

300: transfer switching unit 310: horizontal stopper

320: pusher 400: vertical transfer unit

410: vertical transfer means 411: vertical transfer table

500: bottom measuring unit 510; Penetration

520: block 530: light emitting unit

540: light receiver 600: camera measuring means

610: light emitting mechanism 611: mounting member

612: ore 613: reflecting means

620: camera mechanism 621: base block

622: support member 623: transfer guide

624: sliding body 625: camera

700: discharge means 710: hinge point

720: rotating plate 730: actuator

M: micrometer

Hereinafter, the measuring device according to the present invention and a measuring method according to the configuration of the measuring device will be described in detail with reference to the accompanying drawings.

3 is an overall plan view showing a measuring apparatus of the present invention.

As shown in FIG. 3, the present invention converts the direction from the horizontal conveying part 200 and the horizontal conveying part 200 which are connected from the shield introduction conveyor 100 to receive the completed shield from the shield assembly device A. FIG. Consisting of the transfer switching unit 300, and the vertical transfer unit 400 that follows.

First, the configuration of the present invention will be described.

The horizontal transfer unit 200 includes a horizontal transfer unit 211 and a horizontal transfer unit 210 for transferring along the horizontal transfer unit to simultaneously measure a contact portion formed on the front surface of the shield introduced from the shield introduction conveyor and a contact portion formed on the rear surface thereof. At least one camera measuring means 600 installed in the front and rear directions of the horizontal transfer means, and a discharge means 700 for discharging the defective shield.

In addition, the transfer switching unit 300 transfers the shield, which has completed the measurement of the contact portion formed on the front and rear sides of the horizontal transfer unit, to the next measurement step, and stops the horizontal transfer by the horizontal stopper 310 and the horizontal stopper. The shield is turned so as to move in a direction orthogonal, that is, vertically, with the push rod 320 operated by the actuator.

The vertical feeder 400 includes a vertical feeder 411, a vertical feeder 410 for transferring along the vertical feeder, for measuring the contact portions formed on the left and right sides of the shield introduced from the transfer switcher, and the vertical feeder. At least one camera measuring means 600 installed on the left and right sides of the means, and a discharge means 700 for discharging the defective shield.

At this time, the horizontal conveying means 210 and the vertical conveying means 410 is a configuration similar to each other as shown in Figures 5 and 6, in the upper portion of each of the horizontal conveyer 211 and the vertical conveyer 411 Two or more chain sprockets 811 provided on both sides along the longitudinal direction, an actuator 814 including a timing pulley 812 to drive the chain sprocket 811, and fixed to the chain sprocket at regular intervals. At the same time, a plurality of attachment members 813 are provided to move while approaching the upper surface of the horizontal transfer table 211.

In addition, the bottom measuring device 500, as shown in FIG. 9, after the transmission unit 510 is provided on the horizontal carriage 211 or the vertical carriage 411, the angle inclined from the block body 520 provided on the bottom surface The light emitting unit 530 for emitting a laser light, and the light receiving unit 540 for receiving the reflected light reflected from an arbitrary measurement target surface, wherein the block body 520 is positioned along the guide member 550. In order to be able to vary, but installed in the direction orthogonal to the horizontal carriage (211) or vertical carrier (411) to move, and also to enable the precise movement of the micrometer (M) is adopted.

The following camera measuring means 600 is an important configuration in the present invention.

Each of the horizontal transfer unit and the vertical transfer unit includes a camera measuring unit 600 including a laser light emitting mechanism 610 and a camera mechanism 620, respectively, and a plurality of measuring units of the shield to be measured are provided as many.

First, the light emitting mechanism 610 and the camera mechanism 620 of the camera measuring means 600 shown in FIG. 7 or FIG. 8 will be described.

The light emitting device 610 includes an installation member 611 fixed to a side surface of the horizontal carriage 211 or the longitudinal carriage 411, a housing 612 for emitting laser light inside the mounting member, and the housing 612. It includes a reflecting means 613 for refracting the light from the horizontal carrier 211 or the upper surface of the vertical carrier 411.

In addition, the camera mechanism 620 is provided on the side of the horizontal and vertical carriage (211, 411), the base block 621, a plurality of support members 622 provided on the base block, and the support member A transport guide rod 623 connected between them, a slide member 624 which can slide along the transfer guide rod 623, and a micrometer M adopted to precisely control the slide member 624. And a camera 625 fixed to the upper surface of the sliding body 624, and fixed inclined downward at an arbitrary angle θ while focusing in the same direction as the direction of light emitted from the light body 612. .

Therefore, since the camera 625 is installed inclined downward toward the shield on the horizontal carrier or the vertical carrier as shown in FIG. 7 or FIG. When moving forward / backward by M), the position of the focal point can be precisely adjusted before and after the movement of the sliding body 624.

On the other hand, the discharging means 700 installed in the horizontal conveying unit 200 and the vertical conveying unit 400 is provided in the middle of the horizontal conveying table 211 or the vertical conveying table 411, the same as the conveying table It is composed of a rotating plate 720 that can be rotated downward with the hinge point 710 while maintaining the height, and an actuator 730 that can be inclined by pushing one end of the rotating plate 720.

Therefore, while being transported by the horizontal conveying means 210 or the vertical conveying means 410 while being mounted on the horizontal conveying stand 211 and the vertical conveying stand 411, the rotating plate 720 is rotated downward by the operation of the actuator 730. The shield in that position is discharged down.

The following describes an inspection method using the inspection apparatus of the present invention configured as described above.

The inspection process of the present invention is a horizontal transfer process for transporting the shield horizontally through the horizontal transfer stage, and before measuring the contact portion of the front side and the rear side simultaneously with the camera measuring means provided in the front and rear of the horizontal transfer stage during the horizontal transfer process. In addition, the shield, which is normally determined in the rear contact measurement process and the front and rear contact measurement process, passes through the primary screening process of discharging the badly determined shield to the discharge means.

This is the process of measuring the contact parts provided before and after the shield.

Subsequently, the longitudinal transfer process of vertically transferring the shield determined as normal through the primary screening process as the transfer switching means of the transfer switching unit, and the left side of the camera measuring means provided on the left and right sides of the vertical transfer stage during the vertical transfer process. And measuring the left and right contacts at the same time to measure the contacts on the right side, and passing through the secondary screening process of passing the shield determined as normal in the left and right contacts, and discharging the badly determined shield to the discharge means. The measurement is completed up to the contacts provided on the left and right sides of the shield.

At this time, if there is a contact portion inside the shield, either the above-described horizontal transfer process or vertical transfer process, or both horizontal transfer process and vertical transfer process may add a bottom measurement process for measuring the contact portion provided in the shield. Can be.

The above process will be described in more detail with reference to the drawings.

In the present invention, as shown in FIG. 3, a shield supplied one by one from the shield assembly device A indicated by a virtual line is supplied through the conveyor 100.

In the conveyor is supplied lined up one by one on the horizontal conveyer 211 of the horizontal conveying unit 200, the attachment member 813 connected to the chain 810 of the horizontal conveying means 210 to push it at a constant interval.

As described above, during the process of passing through the horizontal conveyer 200, the contact parts provided before and after the shield are inspected by the camera measuring means 600 installed before and after the horizontal conveyer 211 (see FIG. 7). Subsequently, the bottom measuring instrument 500 inspects an internal horizontal contact part by operating the light emitting part 530 and the light receiving part 540 provided in the block body 520. (See FIG. 9).

As described above, when inspecting the contact portion provided before and after the horizontal transfer portion 200 and the horizontal contact portion provided therein, if any of them is judged to be defective beyond the allowable tolerance, the discharge means 700 is opened and discharged without further progressing. (See Fig. 10).

Next, the operation (see FIGS. 4 and 11) by the pusher 320 of the transfer switching unit 300 is sent to the vertical transfer stage 411 of the vertical transfer unit 400 without the shield rotating at all.

In the vertical carriage 411, as in the horizontal transfer means 210, the attachment members 813 connected to the chain 810 are pushed at regular intervals, and in the process, on the left and right sides of the vertical carriage 411. At the same time, the contact measuring portions provided on the left and right sides of the shield are simultaneously inspected by the camera measuring means 600 (see FIG. 7), and the light emitting unit 530 provided in the block body 520 in the bottom measuring instrument 500 and The light-receiving portion 540 is operated to inspect the inner vertical contact portion (see FIGS. 9 and 11).

At this time, if any of the contact portions of the shield to be measured is judged to be bad beyond the allowable tolerance, the discharge means 700 is opened and discharged without further progressing (see FIG. 10).

After that, if all inspection is judged to be normal, it is sent to the next packing device.

At this time, the contact parts of the shield are determined according to how far apart from the floor, the amount of fire is determined, and when determining whether it is within the tolerance range, it is determined by the number of pixels of the screen shot by the camera.

That is, when the state spaced apart from the bottom of the horizontal carriage or vertical carriage is photographed with a camera as shown in FIG. 12, the number of pixels (a) falling within the separation distance with respect to the total number of pixels is 100%. When the value is found, if the value is more than the preset value, it is out of the tolerance, and if it is less, it is within the tolerance.

According to the apparatus and the inspection method of the present invention as described in detail above, the camera measurement is provided with all the contacts before, after, and left, right and inside of the continuously supplied shield on the front, rear, left, right side and bottom of the shield. By measuring with means and laser light sources, errors can be checked.

Therefore, it is possible to simultaneously inspect multiple contact portions formed on all sides and inside while minimizing the moving distance of the shield, thereby reducing productivity of the inspection apparatus and greatly improving productivity.

On the other hand, it is possible to precisely adjust the position of the light and the focal length of the camera by micrometer in constructing each camera measuring means and the bottom measuring device. You can cope immediately. Therefore, all the shields can be applied regardless of the size and type, so compatibility is great.

In particular, since the error value of the measured result is digitized by using the number of pixels, and a good or bad is determined according to the measured value according to the number of pixels, there is a very accurate advantage.

Claims (11)

A shield introduction conveyor (100) for receiving the completed shield from the shield assembling apparatus in a normal position; In order to measure the front and rear surfaces of the shield introduced from the shield introduction conveyor, a horizontal feeder 211, a horizontal feeder 210 for transferring along the horizontal feeder, and installed in front and rear directions of the horizontal feeder. A horizontal transfer unit 200 including at least one camera measuring unit 600 and a discharge unit 700 for discharging the defective shield; Transfer the shield after the measurement of the front, rear from the horizontal transfer unit to the next measurement step, the horizontal stopper 310 for stopping the horizontal transfer, and the push rod 320 to operate the shield stopped by the horizontal stopper by the actuator Transfer switching unit 300 for changing the direction to move in the direction orthogonal to the; In order to measure the left and right sides of the shield introduced from the transfer switching unit, a vertical feeder 411, a vertical feeder 410 for transferring along the vertical feeder, and at least installed on the left and right sides of the vertical feeder. A vertical transfer unit 400 including one or more camera measuring means 600 and discharge means 700 for discharging the defective shield; A bottom measuring device 500 provided in at least one of the horizontal transfer part 200 and the vertical transfer part 400; Shield inspection device for an IC device of a circuit board, characterized in that consisting of. The method of claim 1, The horizontal conveying means 210 and the vertical conveying means 410 are two or more chain sprockets 811 provided on both sides along the longitudinal direction at the top of each of the horizontal conveying table 211 and the vertical conveying table 411, and An actuator 814 including a timing pulley 812 to drive the chain sprocket 811 and a plurality of actuators fixed to the chain sprocket at regular intervals and moved close to the upper surface of the horizontal carriage 211. A shield inspection apparatus for an IC element of a circuit board, comprising: an attachment member 813 of the circuit board. The method of claim 1, The bottom measuring device 500 is provided with a transmissive part 510 on the horizontal carrier 211 or vertical carrier 411, and then emits a laser light at an inclined angle from the block body 520 provided on the bottom 530 and a light receiving unit 540 for receiving the reflected light reflected from an arbitrary measurement target surface. The method of claim 3, wherein The block body 520 is to be able to vary the position along the guide member 550, it is installed in the direction orthogonal to the horizontal carriage 211 or the vertical carriage 411 to move, the movement of the micro A shield inspection apparatus for an IC element of a circuit board, which is precisely adjusted as a meter (M). After passing through the horizontal feeder 200 and the vertical feeder 400 in order to measure the processing state of the contact formed on the front and rear of the shield and the contact formed on the left and right sides, An IC device of a circuit board, characterized in that a plurality of camera measuring means 600 consisting of a laser light emitting mechanism 610 and a camera mechanism 620 are respectively installed in the horizontal transfer portion and the vertical transfer portion to measure several contacts at the same time. Shield inspection device The method of claim 5, wherein The light emitting device 610 includes an installation member 611 fixed to side surfaces of the horizontal and vertical carriages 211 and 411, a housing 612 for emitting laser light inside the installation member, and the housing 612. And shielding means (613) for refracting light emitted from the horizontal and vertical carriers (211, 411) to the top surface of the circuit board. The method of claim 5, wherein The camera mechanism 620 is provided on the side of the horizontal and vertical carriages 211 and 411, the base block 621, a plurality of support members 622 provided on the base block, and the support member A transport guide rod 623 connected between them, a slide member 624 which can slide along the transfer guide rod 623, and a micrometer M adopted to precisely control the slide member 624. And a camera 625 fixed to an upper surface of the sliding body 624, the focus being inclined downward at an arbitrary angle θ while being focused in the same direction as the direction of light emitted from the housing 612. A shield inspection device for an IC element of a circuit board. The method of claim 1, Discharge means 700 installed in the horizontal transfer unit 200 and the vertical transfer unit 400 is provided in the middle of the horizontal transfer unit 211 or vertical transfer unit 411, the same height as the transfer table A circuit comprising a rotating plate 720 capable of rotating downward with a hinge point 710 and an actuator 730 that can be inclined by pushing one end of the rotating plate 720. Shield inspection device for IC elements of a substrate. A horizontal transfer process of horizontally transferring the shield through a horizontal transfer table; A front and rear contact portion measuring step of simultaneously measuring contact portions of the front side and the rear side with camera measuring means provided at the front and the rear side of the horizontal transfer stage during the horizontal transfer process; A first screening process of passing the shield, which is normally determined in the front and rear contact measurement processes, and discharging the badly determined shield to the discharge unit; A vertical transfer process of vertically transferring the shield determined as normal through the first sorting process as a transfer switching means of the transfer switching unit; A left and right contact part measuring step of simultaneously measuring left and right contact parts as camera measuring means provided on the left and right sides of the vertical transfer table during the longitudinal transfer process; A second screening process of passing the shield, which is normally determined in the left and right contact measurement, to discharge the badly determined shield to the discharge unit; Shield test method for an IC device of a circuit board, characterized in that the measurement via. The method of claim 9, The laser measuring apparatus used in the above-mentioned front and rear contact measurement process and the left and right contact measurement process uses a laser light emitting device and a camera mechanism, and calculates the error value of the defective dimension by calculating the number of pixels of the screen captured by the camera. The shield inspection method for IC elements of a circuit board characterized by the above-mentioned. The method of claim 9, And a bottom measurement process for measuring a contact portion provided inside the shield during any one of the horizontal transfer process and the vertical transfer process.