JPH0727009B2 - Defect point display device of mounted printed circuit board - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a defective portion display device for a mounted printed circuit board, and more specifically, directly to a circuit element (circuit component) determined to be defective by the printed circuit board inspection device. The present invention relates to a defective portion display device for a mounted printed circuit board, which is provided with a specific mark so that the defective component can be easily identified.

[Technical Background of the Invention] After contacting various circuit elements mounted on a printed circuit board with contact probes and deciding which contact probe to use in the multiplexer section, short / open between each probe and element A printed circuit board inspection device that measures the constants etc. one by one and automatically compares them with the inspection data created in advance to judge pass / fail
It is widely used in the manufacturing process of mounting elements and the like on a printed circuit board.

In such a printed circuit board inspection apparatus, an inspection is performed based on a preset inspection step, the inspection result is stored in a memory, etc., and the display is divided into sub-displays corresponding to the printed circuit board sequentially or after the inspection is completed. The displayed map position is displayed, and the map position where the defective part among these map positions has occurred is displayed. With such a defective portion, the map position is printed out along with the step where the defective portion is generated by an internal or external printer, and the piece of paper is attached to the printed board and sent to the repair process. In the repair process, look at this piece of paper and identify the location where the defective part has occurred from the basic map, individually check the actual elements etc. in that location to find the corresponding element etc.,
The method of repair is adopted.

[Problems to be Solved by the Invention] Since defective parts are displayed by a map in this way, it is possible to roughly estimate where the actual element is located, but many defective parts are located within the corresponding map position. If there are such elements, it is not possible to find the corresponding element or the like unless all of these elements are checked, so that the work takes a considerable amount of time. Therefore, it is widely practiced that a serial number is given to each element or the like in advance, and when a defective portion is detected, the element number determined to be defective is printed out together with the display of the corresponding portion. However, since the element number does not represent the actual position in the corresponding map position, it is necessary to check the number of each element by hitting, and there is a drawback that the work time is still required.

Therefore, an object of the present invention is to mount a printed circuit board which is determined to be defective by a printed circuit board inspection device, so that a defective component can be easily identified in a repair process by directly attaching a specific mark. It is to provide a defective portion display device for a substrate.

[Means for Solving Problems] In order to achieve the above-mentioned object, the present invention inspects each circuit element mounted on a printed circuit board by a printed circuit board inspection device for each element, and determines that the circuit element is defective. In a defective portion display device of a mounted printed circuit board that puts a specific mark on the printed circuit element, storage means for storing each position of the circuit element on the printed circuit board, and defective part information from the printed circuit board inspection device. Receiving the position information of the corresponding circuit element from the storage means,
Marking means that moves according to the position information and attaches the specific mark to the corresponding circuit element is provided.

The defective portion display device according to the present invention may be incorporated in the printed circuit board inspection device or may be a device independent of the printed circuit board inspection device.

[Embodiment] FIG. 1 shows an embodiment in which the defective portion display device of the present invention is incorporated in a printed circuit board inspection device.
According to this, the printed circuit board inspection device 1 includes the housing 2
Fixture board 3 detachably attached to the upper surface of the
And a contact probe in which a large number of printed circuit boards 4 mounted with various circuit elements, which are the objects to be inspected, mounted on the fixture board 3 and printed with connection circuits of the various circuit elements are mounted on the fixture board 3. 5 and a pressure member 6 for pressing it. This pressure member 6
Is a pressurizing means such as a compressor (not shown),
It is configured to move up and down. Reference numeral 7 denotes a presser bar member whose upper end is supported by the lower surface of the pressing member 6, and the lower end of the presser bar member 7 is positioned so as not to come into contact with the circuit element of the printed circuit board 4. The terminal of the circuit element surely contacts the contact probe 5. On the upper surface of the housing 2, a display means 8 composed of a CRT and the like, and an inspection program for setting so as to measure each element one by one, and instructions for calling a specific element, etc. A keyboard 9 for operating is also provided. Reference numeral 11 is a printer for printing out defective elements and connection defective portions found by the printed circuit board inspection apparatus 1, 12 is a set defective element name, connection defective portion or insertion of a floppy disk for storing a measurement program. It is a department. Since such a configuration is the same as that of the conventional printed circuit board inspection apparatus, detailed description and drawings are omitted.

Marking means 21 is mounted on the housing 2 so as not to obstruct the lowering of the pressing member 6. As shown in detail in FIG. 2, the marking means 21 includes a hollow rectangular first tubular member 22 extending in the left-right direction in the drawing, and one end supported on the first tubular member 22 and extending therethrough. Direction is the first tubular member 22
It has a first tubular member 22 and a second tubular member 23 having substantially the same shape in a direction orthogonal to that. In the first cylindrical member 22, a screw rod member 24 having a spiral thread on its circumferential surface is rotatably supported, and one end of the screw rod member 24 drives a reversible step motor 25. It is connected to the axis. As shown in FIG. 3, the screw rod member 24 is screwed into a screw hole 27 of a holder member 26 having a rectangular outer shape, and the holder member 26 is rotated in the first cylindrical member 22 by the rotation of the screw rod member 24. It is designed to move left and right without doing. This holder member 26
Has a neck portion 29 formed on the upper surface of the first tubular member 22 and protruding from a groove 28 extending in the longitudinal direction, and a support base member 31 whose lower surface is fixed to the neck portion 29. Inside the support base member 31, a step motor 32 similar to the step motor 25 is provided.
A motor caging 33 for accommodating is installed. One end of the second tubular member 23 is attached to the motor casing 33, and a screw rod member 34, one end of which is connected to the drive shaft of the step motor 32, also extends rotatably in the second tubular member 23. . A holder member 35 similar to the holder member 26 is also threadedly inserted into the screw rod member 34. The holder member 35 has a neck portion 37 formed on the side surface of the second tubular member 23 on its side surface and protruding from a groove 36 extending in the longitudinal direction. This neck 37
A marker means 38 is attached to the. Marker means
38 is a marking member 39 composed of a felt pen or an ink pen attached so as to be able to descend downward from the lower end thereof,
A solenoid 41 for controlling the vertical movement of the marking member 39
And have. 42 is a motor caging for housing the step motor 25. With such a configuration, when the step motor 25 is rotated, the second cylinder member 23 can be moved in the left-right direction on the first cylinder member 22 according to the rotation direction thereof, and when the step motor 32 is rotated, the marker is generated. means
38 can be moved in the longitudinal direction of the second tubular member 23. Therefore, by controlling the rotations of the two step motors 25 and 32, the marker means 38 is moved to the printed circuit board 4.
It can be located anywhere.

Next, the operation of the marker means 38 will be described with reference to FIG. 4 together with its electrical configuration and the control circuit of the printed circuit board inspection apparatus. A multiplexer unit 53 is connected via a measuring unit 52 to a microcomputer (hereinafter, referred to as CPU) 51 for controlling and instructing the measurement order of each element on the printed circuit board 4. When the pressing member 6 descends to bring the contact probe 5 into contact with each element on the printed circuit board 4, the multiplexer unit 53 performs measurement in accordance with the inspection order from the CPU 51. Decide which contact probe 5 to use.
Then, the short / open between the respective probes 5 and the constants of the elements are measured by the measuring section 52 one by one.
The measurement result is sent to the CPU 51, and compared with the reference inspection data from the memory 54 that stores the inspection program and the reference inspection data created in advance, and the quality is judged. In the case of a defect, the CPU 51 stores the map position where the corresponding element is located, the element number, etc. in the memory 54, displays it on the display means 8, and causes the printer 11 to print the data. When all the measurements have been completed, the pressure member 6 is raised, and then the marker means 38 is moved onto the defective element. Reference numeral 55 denotes an external storage means such as a floppy disk, which stores an inspection program and preliminarily prepared reference inspection data, and the information of the external storage means 55 is stored in the memory 54 via the CPU 51. The defective element information may be stored in the external storage means 55.

To set the amount of movement of the marker means 38, the actual position of each element on the printed circuit board 4 corresponding to the element number is set in the XY direction value, and this position data is stored in the memory 56 in advance. Then, the defective measurement data from the CPU 51 is sent to the position setting unit 57, the position setting unit 57 extracts the actual position of the corresponding element from the element number, the drive control unit 58 controls the rotation of the step motor 25, The position of the second tubular member 23, that is, the X direction value is determined, and then the rotation of the step motor 32 is controlled to determine the position of the marker means 38, that is, the Y direction value. This allows the marker means 38 to be placed above the relevant element.
Can be located. When the marker means 38 is located above the corresponding element, the solenoid 41 is operated to lower the marking member 39 to mark the element. When there are a plurality of defective elements on the same printed circuit board 4, this operation is repeated to mark the defective elements one after another. After marking all the defective elements, the second tubular member 23
Are returned to the positions shown in FIGS. 1 and 2. The actual position is set by marker means on each element on the printed circuit board 4.
The position can be easily set by manually positioning 38 and storing the X and Y direction values at this time in the position setting unit 57 together with the element number.

The element thus marked may be sent to a repairing step, and in the repairing step, the marked element may be removed from the printed board 4 and replaced with a new element.

In the above embodiment, the memory 56 for marking, the position setting unit 57 and the drive control unit 58 are provided separately, but the CPU 51 and the memory 54 for the printed circuit board inspection device may be shared. Further, since the marking member 39 uses an ink-jet type pen, the solenoid 41 becomes unnecessary.

Unlike the above embodiment, the defective portion display device according to the present invention can be configured as a separate device separated from the printed circuit board inspection device.

In that case, the marking means 21 shown in FIG.
Is an independent device, and the defective element information is received from the printed circuit board inspection device 1 by, for example, a floppy disk, and its electrical circuit configuration may be as shown in FIG.

That is, 61 is a memory reading means such as a floppy disk in which defective element information from the printed circuit board inspection device 1 is written, and the defective element information read by this memory reading means 61 is stored in the memory 63 via the CPU 62. Written. The reading control of the memory reading means 61 is controlled by the keyboard 64 via the CPU 62. A position setting unit 65 is connected to the CPU 62. Similar to the position setting unit 57 of the above-described embodiment, the position setting unit 65 sets the actual position of each element in advance in the XY direction values, and the position data is stored in the memory 67 in advance.

The CPU 62 reads defective element information from the memory 63 and sends it to the position setting unit 65. In response to this, the position setting section 65 extracts the actual position of the corresponding circuit element from the element number and gives it to the drive control section 68 of the marking means 21. This allows
As in the above-described embodiment, the marker means 38 is moved onto the defective element, and the defective element is marked.

[Effects of the Invention] As described above, in the defective portion display device for a mounted printed circuit board of the present invention, a defective element found by a printed circuit board inspection device can be provided with an identifiable mark. It is only necessary to find the element with the mark from the printed circuit board in which the occurrence of "1" occurs and repair it, so that the working process is greatly eased and the time required can be shortened.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention together with a main part of a printed circuit board inspection apparatus, FIG. 2 is a plan view showing a defective portion display mechanism thereof, and FIG. 3 is an enlarged view of a part thereof. 4 is a sectional view of the printed circuit board, FIG. 4 is a block diagram showing the electrical configuration of the printed circuit board inspection device, and FIG. 5 is an electrical diagram when the defective portion display device of the present invention is different from the printed circuit board inspection device. It is a block diagram showing a typical configuration. In the drawings, 1 is a printed circuit board inspection device, 3 is a fixture board, 4 is a printed circuit board, 5 is a contact probe, 6 is a pressing member, 21 is a marking means, 22 is a first cylinder member, and 23 is a second cylinder member. , 24 and 34 are screw rod members, 25 and 32 are step motors, 26 and 35 are holder members, 28 and 36 are grooves, and 51 is
A CPU, 52 is a measuring unit, 53 is a multiplexer unit, 54 and 56 are memories, 57 is a position setting unit, and 58 is a drive control unit.

Claims (2)

[Claims] 1. A printed circuit board inspection apparatus inspects each circuit element mounted on the printed circuit board for each element, and a specific mark is attached to the circuit element determined to be defective. In the position display device, storage means for storing each position of each circuit element on the printed circuit board, and position information of the corresponding circuit element read from the storage means upon receiving defective part information from the printed circuit board inspection device. And a marking unit that moves according to the position information and attaches the specific mark to the corresponding circuit element. 2. The storage means according to claim 1, wherein the storage means stores the position of each circuit element as an XY direction value, and the marking means extends in one of the XY directions. And a second member having one end movably supported by the first member in the one direction and the other end extending in the other direction of the XY direction, and an extension of the second member. A defective portion display device for a mounted printed circuit board, comprising a marking member movably mounted in the present direction.