JPH09172300A - Method and device for inspecting appearance of printed board unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatize re-inspection by view and to improve the automatization rate of inspection on the printed board unit by detecting the detection of the printed board unit to be inspected in an appearance inspection machine and inspecting a part judged to be the defect with the in-circuit tester of a moving probe-type. SOLUTION: The printed board unit 1, an appearance inspection execution part 14 executing inspection and judging propriety and an in-circuit test execution part 15 executing measurement and judging propriety are provided. The appearance inspection machine generates defect detection data on the printed board unit 1 in accordance with test data in a data file 11. Data obtained by extracting only data of parts number which are the same as those in defect detection data are generated. The in-circuit tester of the moving probe-type re-inspects parts on test data. Thus, the automatization rate of inspection on the printed board unit can be improved by automatizing re-inspection by view.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting the appearance of a printed board unit, and more particularly to a method and an apparatus for inspecting a manufacturing failure such as a component mounting failure or a soldering failure of an SMT printed board unit.

In general, a printed board unit is often subjected to automatic component mounting and soldering by a machine, so that mounting failure or soldering failure may occur. A method for inspecting such a defective state. And equipment is needed.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for inspecting manufacturing defects such as component mounting defects and soldering defects of an SMT printed board unit, an external shape of an object to be inspected is detected by an optical means such as a television camera and an experiment is conducted in advance. For example, an automatic visual inspection machine that detects a defective state by comparing it with a non-defective state that is set by obtaining the value, and electrically measures the constants and conduction states of the mounted components, and sets the non-defective value that is set in advance by experiments. There is an in-circuit tester (hereinafter sometimes abbreviated as ICT) that compares and detects a defect.

[0003]

Among these, the automatic appearance inspection machine is a machined visual sensory inspection,
A judgment result that does not match the visual inspection result occurs.

That is, FIG. 13 shows an example of determining the soldering state of an IC (integrated circuit) lead. The upper surface of the state where the lead floats and the joint is defective ((1) in the same figure) is shown in FIG. The image taken by the camera is shown in (2) in the figure. This is the image when the top surface of the normal joint part ((3) in the figure) when the amount of solder is large is taken by the TV camera. Similar to ((4) in the figure), the appearance inspection machine also determines that the normal bonding state ((4) in the figure) is defective in order not to overlook the defect.

As described above, in general, a large number of non-defective products can be included in the defect judgment of the automatic visual inspection machine. Therefore, the defective judgment portion by the automatic visual inspection is detected by the automatic visual inspection machine 20 as shown in FIG. The conventional method (1) of complementing and correcting by visually re-inspecting (verifying) the printer output result 201 to obtain the inspection result content 202, or the data storage file of the automatic visual inspection machine 20 as shown in FIG. Two
Using the inspection result (defect) data stored in 03 and the visual inspection support device 204 with an XY stage, the XY stage is moved, and a defect correction portion displayed in an enlarged manner is visually inspected again to perform complementary correction. (2) is adopted.

In this way, if there are many defective judgment points in the automatic visual inspection, a lot of man-hours are spent for the re-inspection, and the merit of adopting the automatic inspection is diminished.

On the other hand, the above-mentioned inserter kit tester is also an effective means for electrically detecting a manufacturing defect, but in a miniaturized / high-density surface mount printed board unit, probing by a dedicated fixture is difficult. The application rate is decreasing.

Although a fixtureless type in-circuit tester using a moving (flying) probe is commercially available, it has a drawback that it is not suitable for mass production because it takes a long test time.

Further, although an apparatus having an automatic visual inspection function for the in-circuit test has already been provided on the market, these are for performing the inspection by sharing the inspection items. It does not automatically reinspect the location.

Therefore, according to the present invention, by combining an automatic visual inspection machine and a moving probe type in-circuit tester to automate the visual re-inspection (verification), the printing rate of the printed board unit inspection is improved. It is an object of the present invention to realize a method and apparatus for visual inspection of a plate unit.

[0011]

[Means for Solving the Problems]

[1] In order to achieve the above object, in the appearance inspection method for a printed board unit according to the present invention, appearance inspection is performed on an inspected printed board unit by an appearance inspection machine in accordance with appearance inspection test data to generate defect detection data. , Generating test data for automatic verification by extracting only test data having the same part number as the part number in the defect detection data in the test data for in-circuit tester, and setting the inspected printed board unit to the test data for automatic verification. It is characterized in that the components are re-inspected by a moving probe type in-circuit tester, and the final defect determination result is output by comparing the re-inspection data with the test data for automatic verification.

That is, according to the method of the present invention, the printed circuit board unit to be inspected is detected by the visual inspection machine according to the test data.

By inspecting the defective portion determined by the appearance inspection machine by a moving probe type in-circuit tester (ICT), re-inspection (verification) of the defective portion is automated.

In this case, the mobile probe type in-circuit tester executes the inspection in accordance with the procedure of the test data, and in the present invention, the part number in the defective data of the inspection result is used as a key to identify in the test data. Only the data of the part number is extracted, and only the parts that have failed the visual inspection are tested.

The inspection result is output to a defect result detection storage file or a printer as a final defect determination result.

[2] In the above [1], before generating the test data for automatic verification, the defect detection data is compared with the verification target failure code for the in-circuit tester to separate the visual inspection data in advance. Alternatively, the visual inspection data may be used to perform a visual inspection using a visual support device, and the inspection result may be combined with the final defect determination result.

[3] Further, in the appearance inspection apparatus for a printed board unit according to the present invention used for carrying out the above-described method of the present invention, the printed board unit to be inspected is subjected to appearance inspection test data stored in advance in a file. Appearance inspection machine that generates appearance detection data by performing appearance inspection, and for automatic verification that extracts only test data with the same part number as the part number in the defect detection data in in-circuit tester test data stored in advance in a file The data processing unit that generates the test data and the printed circuit board unit to be inspected are re-inspected for the parts of the test data for automatic verification, and the re-inspection data and the test data for automatic verification are compared to determine the final failure. And a moving probe type in-circuit tester that outputs a determination result. To have.

That is, in the apparatus of the present invention, the printed circuit board unit to be inspected is detected by the visual inspection machine in accordance with the test data stored in advance in the file, and the result is stored in the inspection result file.

Further, in the present invention, the defective judgment portion of the visual inspection machine is inspected by the moving probe type in-circuit tester. The mobile probe type in-circuit tester executes the inspection according to the procedure of the test data stored in the test data file.

In the data processing section of the present invention, only the data of the specific part number in the same test data as the part number in the defective data of the inspection result file is extracted, and only the part which is defective in the visual inspection is tested. A circuit that constitutes the test data for use is added. The in-circuit tester executes the inspection according to this test data. The inspection result is output to a defect result detection storage file or a printer as a final defect determination result.

[4] In the above [3], the data processing unit reads the part number from the defect detection data and stores the first data read register, and the in-circuit tester test data to read the part number and A second data read register for reading and storing the test parameter, and a comparator for comparing the part numbers in the data stored in both registers and detecting only the same.
A data writing register for storing the coincident part number detected by the comparator and its test parameter and outputting it as the automatic verification test data can be provided.

[5] Further, in the above [3], the data processing unit compares the defect detection data with in-circuit tester verification target defect determination data stored in advance in a file to preliminarily provide visual inspection data. It is possible to include an inspection result sorting unit for sorting, perform a visual inspection by a visual support device using the visual inspection data, and the data processing unit can combine the visual inspection result with the final defect determination result.

[6] Further, in the above [5], the inspection result classification circuit includes a data read register for reading and storing a defective code that can be tested by the in-circuit tester, a part number, a defective code, and a position coordinate. A data register configured to read and store the defect determination data, a switch unit that compares the defect determination data of each register and performs a switching operation according to the result, and is separated / stored through the switch unit and automatically It is possible to have a defect determination result of a verification target and a data write register which outputs a defect determination result of a visual verification target.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of an automatic appearance inspection apparatus with an automatic verify function for carrying out the appearance inspection method for a printed board unit according to the present invention. A television camera 2 for moving the unit 1 and the upper portion of the printed board unit 1 to pick up an image of a component or solder, and movable probes 3 to 5 for contacting the component electrodes of the printed board unit 1 to input and output electric signals are prepared. .

Further, a data file 11 which is a set of various files, a data processing unit 12 for transferring test data and inspection results and data processing, an XY for controlling movement of the television camera 2 and the probes 3-5. A table control unit 13, an image processing unit 14a, and a determination unit 14b are provided to process an image captured by the television camera 2 to perform an inspection and a pass / fail determination, and a switching unit 15.
a, the measurement unit 15b and the determination unit 15c are provided, the probe 3 to
An in-circuit test execution unit 15 is provided for switching the electrical signal input / output via the device 5, performing measurement, and determining pass / fail.

The data file 11 is (1) a visual inspection test data file created in advance based on an experiment or the like in order to visually inspect the components on the printed board unit 1 and the soldering points of the components. 2) Consists of an ICT test data file created in advance for in-circuit testing of the same parts as the parts to be inspected, and (3) Content of defect judgment (defective part number, defect code, position coordinate) in appearance inspection. Appearance inspection result (data) file
(4) Test data file for automatic verification created from appearance inspection results and ICT test data, and (5) IC
The final determination result (data) file including the content of the defect determination after the inspection at T is included.

The TV camera 2 and the appearance inspection execution unit 1
4 and 4 make up an automatic visual inspection machine.

The operation of this embodiment will be described with reference to FIG.
When the inspected printed board unit 1 is set, the corresponding visual inspection test data 11 in the data file 11 is set.
1 is loaded (a) into the appearance inspection execution unit 14. The appearance inspection execution unit 14 that constitutes the automatic appearance inspection machine 20 uses the appearance inspection test data file 111 in the data file 11.
The TV camera 2 is moved in accordance with the test data of 1., the mounted parts and the solder part are imaged, the image quality of the imaged image and the test parameters (contents) are compared and determined based on the test parameters (contents), and the content of the defect is used as the appearance inspection result File 1
Store (b) in 12. Up to this point, it is the same as the conventional automatic visual inspection machine.

Next, the ICT test data file 11
Using the corresponding ICT test data stored in advance in 3 and the above-mentioned appearance inspection result, the automatic verification test data for performing the in-circuit test on only the parts determined to be defective by the appearance inspection is the automatic verification test data. It is created by the creating unit 22 and stored (c) in the data file 114.

In other words, in this embodiment, the test data file 113 is keyed to the component type number (hereinafter referred to as the component number) in the defective data of the inspection result file 112.
Only the data of the specific part number in the inside is extracted, and the test data for verification is generated to test only the part number that is defective in the visual inspection.

The test data for automatic verification is loaded into the in-circuit test execution section 15, and only the parts judged to be defective by the visual inspection are probed by the moving probe ICT 30 according to the procedure of the test data stored in the test data file 114. Perform an in-circuit test.

The test result is stored in the data file 115 as the final determination result and is output (d) as a defect detection result storage print 23 for visual inspection.

FIG. 3 shows an embodiment of the automatic verify test data creation unit 22 shown in FIG. 2. In this embodiment, three register units 221 to 223 and a comparator 22 are provided.
4 is included.

In outline, first, the data read register section 221 reads the part number data of the address indicated by the address counter AC1 from the appearance inspection result file 112 and stores it in the register R1.

In the data read register section 222, the part number data and test parameter data (contents) of the address indicated by the address counter AC2 are read out from the ICT test data file 113 and stored in the registers R2-1 and R2-2, respectively. Store.

The comparator 224 compares the part number data stored in the register R1 with the part number data stored in the register R2-1. If the data do not match,
The address counter AC2 is counted up, and the part number data indicated by the next address is read from the ICT test data file 113. When the data match, the part number data and the test parameter data respectively stored in the registers R2-1 and R2-2 are passed through the data write register section 223 and passed through the automatic verification test data file 114 indicated by the address counter AC3. Stored in.

The address counter AC1 of the data read register unit 221 is counted up, and the address counter AC2 of the data read register unit 222 is reset. Thereafter, the same operation is repeated.

FIG. 4 is a flow chart showing the process of creating the test data for automatic verification. The appearance inspection result file 112 and the ICT test data file 1 are shown.
13 shows a processing flow when a termination code is provided at the end of 13 data.

First, the initial value is set in the address counter AC1 (A1 ← a1) (step S1), the initial value is set in the address counter AC3 (A3 ← a3) (step S2), and the appearance inspection result file 112 is set. The part number stored in the address (A1) is set in the register R1 (step S3).

Then, it is determined whether or not the register R1 = termination code (step S4). If "YES", the process exits this flowchart, but if "NO",
Set the initial value to the address counter AC2 (A2 ←
a2) (step S5).

Then, the ICT test data file 1
The part number stored in the address (A2) of No. 13 is stored in the register R2-1, and the test parameter is stored in the register R2.
-2 (step S6).

Then, it is determined whether or not the register R2-1 = termination code (step S7), and if "YES", the process proceeds to step S13 to address counter AC1.
Is incremented by "1", but if "NO", it is determined whether or not register R1 = register R2-1 (step S8).

As a result, if "NO", the address counter AC2 is incremented by "1" (step S9), but if "YES", the register R2-1.
Is transferred to register R3-1, register R2-2
Is transferred to the register R3-2 (step S1
0).

Further, the contents of the register R3-1 are stored in the part number storage area of the address (A3) of the automatic verification test data file 114, and the contents of the register R3-2 are stored in the test parameter storage area (step S11). ).

The address counters AC3 and AC
1 is incremented by "1" (steps S12 and S13)

Similar to FIG. 4, FIG. 5 also shows a process flow chart for creating test data for automatic verification, but here, in particular, a process flow chart when an area for storing the number of data is provided at the beginning of each file. Is shown.

That is, first, the address counter AC1
The initial value is set to (A1 ← a1) (step S2
0), and set an initial value to the address counter AC2 (A
2 ← a2) (step S21), and an initial value is set in the address counter AC3 (A2 ← a2) (step S22).

Next, the number of data (M) stored at the address (a1) of the appearance inspection result file 112 is read (step S23), and the ICT test data file 1 is read.
The number of data (N) stored in the address (a2) of 13 is read (step S24).

Furthermore, the part number stored in the address (A1) of the appearance inspection result file 112 is set in the register R1 (step S25), and the part number stored in the address (A2) of the ICT test data file 113 is set. The test parameter is registered in the register R2-1.
2-2 are stored respectively (step S26).

Register R1 = register R2-1
Is determined (step S27), and if "NO", the following steps S28 to S30 are skipped.
In the case of S ”, the contents of the register R2-1 are changed to the register R2-1.
3-1 and transfers the contents of register R2-2 to register R
It transfers to 3-2 (step S28).

Then, the contents of the register R3-1 are stored in the part number storage area of the address (A3) of the automatic verification test data file 114, and the contents of the register R3-2 are stored in the test parameter storage area (step S29). ). Then, the address counter AC3 is incremented by "1" (step S30).

In steps S26 to S30, the value of the address counter AC2 is executed from a2 + 1 to a2 + N, and in steps S25 to S30, the address counter AC is executed.
A value of 1 is executed from a1 + 1 to a1 + N.

The process flow charts of FIGS. 4 and 5 can also be realized by computer software.

In the case of the above embodiment, for example, as shown in FIG. 6, even if the component mounting deviation between the footprints 61 and 62 and the chip component 63 becomes defective in appearance, they are electrically connected. As long as there is, there is a problem that it will be a good product in the in-circuit test and cannot be detected as a defect.

Therefore, as another embodiment of the present invention, FIG. 7 shows a manufacturing defect detecting device in which a visual support device is further added to the combination of the automatic visual inspection machine-in-circuit tester of the above embodiment.

This device is an automatic visual inspection machine 20 equipped with an identification code recognition device 21 of the printed board unit 1, and a printed board unit identification code recognition device for automatically re-inspecting a defective judgment portion of the automatic visual inspection machine 20. A moving probe in-circuit tester 30 provided with 31 and a printed board unit for moving the XY stage to magnify and display the defect determination location of the automatic visual inspection machine 20 on the screen or in the field of view of the magnifying glass to allow the operator to perform visual inspection. Identification code recognition device 4
1, a visual inspection support device 40, a file server 50 for storing test data and inspection results, and a LAN (local area network) 6 for connecting the respective devices.
It is composed of 0 and.

The operation of this apparatus is shown in FIG. 8 for explaining the manufacturing defect detection operation, the data transition diagram shown in FIG. 9, and FIG.
The operation will be described based on the operation explanatory diagram of the inspection result classification unit shown in FIG.

8 is different from the explanatory view of the automatic verification operation shown in FIG. 2 in that a visual inspection support device 40, an inspection result classification unit 42 and a coupling unit 43 are newly added, and an ICT verification target defective code is added. The storage file 116, the inspection result file 117, the visual inspection result file 118, and the defect detection result storage file 119 are newly added to the data file 11 (FIG. 1).

FIG. 9 shows a processing flow in the case where a termination code is provided at the end of the data of the defective code storage file and the appearance inspection result file.

Further, FIG. 10 shows a processing flow in the case where an area for storing the number of data is provided at the beginning of each file, and in the inspection result classification unit 40, the data read register units 421, 422. A data writing register unit 423, 424, a comparator 44,
Switches SW1 to SW3 are provided.

First, when the inspected printed board unit 1 is set in the automatic visual inspection machine 20 (step S3 in FIG. 9).
1), the identification code recognition device 21 uses the printed board unit 1
The identification code attached to the is read (the same step S3
2) The relevant appearance inspection test data on the file server 50 is loaded into the automatic appearance inspection machine 20 of the test data file 111 (see FIG. 2) (step S33) and the appearance inspection is performed (step S34).

An identification code number is added to the content of the defect, and the result of the appearance inspection (see FIG. 10) is given to the file server 50.
To be stored. As described above, not all the defect judgment points of the automatic visual inspection machine 20 can be re-inspected by the in-circuit tester 30.

Therefore, as a means for discriminating whether or not the defective judgment portion of the automatic visual inspection machine 20 can be re-inspected by the in-circuit tester 30, the defective code for ICT verification is added to the visual inspection result.

Specifically, as shown in FIG. 10, the defect code of the appearance inspection that can be detected by the in-circuit tester 30 in the file server 50 is registered in advance in the defect code storage file 116, and the registration data and the appearance inspection defect are registered. By inputting the results and the results into the inspection result classification unit 42, an inspection result for automatic verification that can be automatically verified by the in-circuit tester 30 and an inspection result for visual verification that can be visually verified without being automatically verified by the in-circuit tester 30. (Step S36).

The method of classifying the inspection result will be described in detail with reference to FIG. 10. First, the data read register unit 421 reads the defective code in the address indicated by the address counter AC1 from the automatic verification target defective code storage file 116. And stores it in the register R1. The data read register unit 422 reads the part number, the defect code, and the position coordinate within the address indicated by the address counter AC2 from the appearance inspection result file 112 and stores them in the registers R2-1, R2-2, R2-3, respectively. The defective code stored in the register R1 and the register R2-2
The defective code stored in is input to the comparator 44 for comparison.

The comparison / judgment output from the comparator 44 is given to the switches SW1 to SW3 as an opening / closing control signal. When the data is the same, the switches SW1 to SW3 are both connected to the 0-1 side, and the registers R2-1 to R2. -3 stores the part number, the defect code, and the position coordinate, respectively, in the registers R3-1 to R in the data write register unit 423.
It is set to 3-3.

That is, the data write register section 4
The reference numeral 23 stores the data in the register in the relevant part of the inspection result (for automatic verification) file 112 'indicated by the address counter AC3. After storing the data, the address counter AC2 and the address counter AC3 are counted up.

In the comparator 44, when the data are not equal, the address counter AC1 is counted up,
The defective code in the address indicated by the address counter AC1 is read and stored in the register R1.

When all the defective codes in the defective code storage file 116 do not match, the switches SW1 to SW3 are all connected to the 0-2 side, and the data read register unit 4
The part number, defect code, and position coordinates stored in 22 are
It is set in the data write register 424.

That is, the data write register R4
In each of -1 to R4-3, the data in the register is stored in the corresponding portion of the inspection result (for visual verification) file 117 indicated by the address counter AC4. After storing the data,
The address counter AC2 and the address counter AC4 are counted up.

The above operation is repeated until there is no data in the appearance inspection result file 111.

Of the thus-separated automatic verification inspection result and visual verification inspection result, the automatic verification inspection result is sent to the automatic verification test data creation unit 22, and thereafter, in the same manner as described with reference to FIG. An automatic visual inspection is performed, and an ICT test result file 115 is obtained.

That is, after the visual inspection is completed as in the conventional case, the inspected printed board unit 1 is set in the in-circuit tester 30 (step S37). The identification code attached to the printed board unit 1 is read by the identification code recognition device 31 (at step S38), and the ICT test data loaded from the file server 50 and the automatic verification target test data are automatically verified. 2 (see FIG. 2) to generate test data for automatic verification (step S39) and store it in the file server 50.

The in-circuit tester 30 loads the automatic verification test data (at step S40),
Perform in-circuit test (step S41),
The result is stored in the file server 50 as the in-circuit test result (step S42). In this case, the ICT test result file stored in the file server 50 is as shown in FIG.
Corresponds to the defect detection result storage file 115.

After the completion of the in-circuit test (even before the in-circuit test is possible), the printed board unit 1 to be inspected is set on the visual inspection support device 40 equipped with an automatically moving XY stage and a magnifying glass or a magnifying display device ( Step S43).

The identification code attached to the printed board unit 1 is read by the identification code recognition device 41 (at step S44), and the corresponding visual verification target appearance inspection result is loaded from the file server 50 (at step S4).
5) While the XY table control unit 13 is moving the XY stage, the defect determination location is displayed and the operator is made to perform the inspection again (step S46).

This inspection result is stored in the file server 50 (file 118) as a visual inspection result (step S47). The in-circuit test result and the visual inspection result are combined by the combining unit 43 to form the final version of the defect detection result, which is stored in the file server 50 as the defect detection result storage file 119 (step S48).

The configurations shown in FIGS. 8 to 10 can also be realized by computer software.

FIG. 11 shows the inspection result classification unit 4 shown in FIG.
2 shows an operation flow (1) of No. 2, first, an initial value is set in the address counter AC2 (A2 ← a2) (step S51), and an initial value is set in the address counter AC3 (A3 ← a3) (step S51). S52), and an initial value is set in the address counter AC4 (A4 ← a
4) (step S53).

Next, the initial value is set in the address counter AC1 (A1 ← a1) (step S54), and the defective code stored in the address (A1) of the defective code storage file is set in the register R1 (step S55). .

The part number stored in the address (A2) of the appearance inspection result file 112 is stored in the register R2-1.
The defective code is stored in the register R2-2, and the position coordinates are stored in the register R2-3 (step S56).

Then, it is determined whether or not the register R2-2 = termination code (step S57), and if "YES", the process exits the flowchart, but if "NO", the register R1 = termination code. It is determined whether the code is a code (step S58), if "NO", it is further determined whether the register R1 = register R2-2 (step S59), and if "NO", the address. The counter AC1 is incremented by "1" (step S60), and the process returns to step S54.

If "YES" in the step S58, data is transferred from the register R2-1 to the register R3-1, the register R2-2 to the register R3-2, and the register R2-3 to the register R3-3. (Step S61).

The register R3-1 is stored in the part number area stored in the inspection result file (for automatic verification) address (A3), and the register R3 is stored in the defective code area.
-2 is stored in the register R3-3 in the position coordinate area (step S62), and the address counter AC3 is set to "1".
Only increments (step S63).

If "YES" in the step S57, data transfer to the register R2-1 → register R4-1, register R2-2 → register R4-2, register R2-3 → register R4-3 is performed respectively. (Step S64).

Then, the register R4-1 is set in the part number area stored in the inspection result file (for visual verification) address (A4), and the register R4 is set in the defective code area.
-2, store the register R4-3 in the position coordinate area (step S65), and set the address counter AC4 to "1".
Only is incremented (step S66).

After that, the address counter AC2 is set to "1".
Only (step S67) and the process returns to step S53.

FIG. 12 shows the inspection result sorting section 4 shown in FIG.
2 shows the operation flow (2) of No. 2, first, the address counter AC1 is set to an initial value (A1 ← a1) (step S71), and the address counter AC2 is set to an initial value (A2 ← a2) (step S71). S72), the initial value is set in the address counter AC3 (A3 ← a3) (step S73), and the initial value is set in the address counter AC4 (A4 ← a4) (step S74).

Next, the number of data (M) stored in the address (a1) of the defective code storage file is read (step S75), and the number of data (N) stored in the address (a2) of the appearance inspection result file 112 is read. Is read (step S76).

The part number stored in the address (A2) of the appearance inspection result file 112 is stored in the register R2-1.
The defective code is stored in the register R2-1 and the position coordinate is stored in the register R2-1 (step S77).

Further, the defective code stored in the address (A1) of the defective code storage file is set in the register R1 (step S78).

Then, register R1 = register R2-2
Is determined (step S79), and if "NO", register R2-1 → register R4-1, register R2-2 → register R4-2, register R2-3 →
The data of each register R4-3 is transferred (step S80), and the inspection result file (for visual verification)
Register R4-1 in the part number area of address (A4)
Is stored, the register R4-2 is stored in the defective code area, and the register R4-3 is stored in the position coordinate area (step S81). Then, the address counter AC4 is incremented by "1" (step S82).

If "YES" in the step S78, the data transfer of the register R2-1 → register R3-1, the register R2-2 → the register R3-2, the register R2-3 → the register R3-3 is performed respectively ( Step S
83), the register R3-1 is stored in the part number area of the inspection result file (for automatic verification) address (A3), the register R3-2 is stored in the defective code area, and the register R3-3 is stored in the position coordinate area. Then (step S84), the address counter AC3 is incremented by "1" (step S85).

Then, the address counter AC1 repeatedly executes the above-mentioned processing for M pieces and the address counter AC2 for N pieces.

[0095]

As described above, according to the method and apparatus for inspecting the appearance of the printed board unit according to the present invention, the printed board unit to be inspected is inspected by the appearance inspection machine in accordance with the appearance inspection test data to detect a defect. Data is generated, and test data for automatic verification is generated by extracting only test data having the same part number as the part number in the defect detection data in the test data for in-circuit tester, and the printed board unit to be inspected is automatically verified. Since it is configured to output the final defect determination result by re-inspecting the parts for the test data by the moving probe type in-circuit tester and comparing the re-inspection data with the test data for the automatic verification,
(1) The visual re-examination work after the printed board unit automatic visual inspection is reduced, and (2) the automation rate of the printed board unit visual inspection is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment (1) of an appearance inspection apparatus for a printed board unit according to the present invention.

FIG. 2 is an explanatory diagram of an automatic verify operation in the embodiment (1) of the present invention.

FIG. 3 is a block diagram schematically showing a configuration of an embodiment of an automatic verification test data creation unit shown in FIG.

FIG. 4 is a flowchart showing an operation example (1) of the automatic verification test data creation unit shown in FIG. 2.

FIG. 5 is a flowchart showing an operation example (2) of the automatic verification test data creation unit shown in FIG. 2.

FIG. 6 is a diagram for explaining a manufacturing defect (positional deviation) that cannot be detected by an in-circuit tester (ICT).

FIG. 7 is a block diagram showing the configuration of an embodiment (2) of the appearance inspection apparatus for a printed board unit according to the present invention.

FIG. 8 is an explanatory diagram of a manufacturing defect detection operation in the embodiment (2) of the present invention.

FIG. 9 is a flowchart showing the operation of the embodiment (2) of the present invention.

10 is a block diagram schematically showing a configuration of an embodiment of an inspection result classification unit shown in FIG.

FIG. 11 is a flowchart showing an operation example (1) of the embodiment of the inspection result classification unit shown in FIG. 8.

12 is a flowchart showing an operation example (2) of the embodiment of the inspection result classification unit shown in FIG.

FIG. 13 is a diagram showing an example in which an erroneous determination is easily made in a visual inspection (an example of soldering state inspection of IC leads).

FIG. 14 is a diagram showing a conventional example (1) (visual verification example using a printer output result).

FIG. 15 is a diagram showing a conventional example (2) (a verification example by visual inspection using a visual support device).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Printed board unit 2 Television camera 3-5 Probe 11 Data file 12 Data processing part 13 XY table control part 14 Appearance inspection execution part 15 In-circuit test execution part 20 Appearance inspection machine 30 Moving (flying) probe in-circuit tester (ICT) 40 Visual inspection support device 42 Inspection result sorting unit 111 Appearance inspection test data file 112 Inspection result file 112 'Automatic verification inspection result file 113 ICT test data file 114 Automatic verification test data storage file 115, 119 Fault detection result storage File 116 ICT verification target defective code storage file 117 Visual verification inspection result file 118 Visual inspection result file 221, 222, 421, 422 For data reading During register unit 223,423,424 data write register unit diagram, the same reference numerals denote the same or corresponding parts.

Claims (6)

[Claims] 1. A printed circuit board unit to be inspected is subjected to a visual inspection by a visual inspection machine according to the visual inspection test data to generate defect detection data, and the same component number as the part number in the defect detection data in the in-circuit tester test data. The test data for automatic verification is generated by extracting only the test data of the number, and the printed circuit board unit is retested by the moving probe type in-circuit tester for the parts corresponding to the test data for the automatic verification. A visual inspection method for a printed circuit board unit, comprising: outputting a final defect determination result by comparing with the test data for automatic verification. 2. The visual inspection data according to claim 1, wherein before the generation of the automatic verification test data, the defect detection data and the verification target defect code for the in-circuit tester are compared to separate the visual inspection data. A visual inspection method for a printed board unit, comprising visually inspecting with a visual assistance device using the visual inspection data, and combining the inspection result with the final defect determination result. 3. A visual inspection machine for producing visual defect inspection data by visual inspection of a printed circuit board unit in accordance with visual inspection test data stored in a file in advance, and in-circuit tester test data pre-stored in a file. In the defect detection data, a data processing unit for generating test data for automatic verification by extracting only test data having the same part number as the part number, and the printed board unit to be inspected for the parts of the test data for automatic verification. Appearance of a printed circuit board unit characterized by including a moving probe type in-circuit tester that outputs a final failure judgment result by inspecting and comparing the re-inspection data with the test data for automatic verification. Inspection device. 4. The first data read register according to claim 3, wherein the data processing unit reads a part number from the defect detection data and stores the part number.
A second data read register for reading and storing a part number and its test parameters from the in-circuit tester test data is compared with the part numbers in the data stored in both registers, and only the coincident parts are detected. A visual inspection of a printed circuit board unit, comprising: a comparator; and a data writing register for storing the coincident part number detected by the comparator and its test parameter and outputting it as the test data for automatic verification. apparatus. 5. The inspection according to claim 3, wherein the data processing unit compares the defect detection data with in-circuit tester verification target defect determination data stored in advance in a file to classify visual inspection data in advance. A printed board unit including a result separation section, wherein the visual inspection data is used for visual inspection using the visual inspection data, and the data processing section combines the visual inspection result with the final defect determination result. Appearance inspection device. 6. The inspection result classification circuit according to claim 5, comprising a data read register for reading and storing a defective code that can be tested by the in-circuit tester, a part number, a defective code, and a position coordinate. A data register for reading and storing the defect determination data, a switch unit for comparing the defect determination data of each register and performing a switching operation according to the result,
An appearance inspection apparatus for a printed circuit board unit, comprising: a data writing register which is separated and stored through the switch unit and which outputs a result of a defect determination result of an automatic verification target and a result of a defect determination result of a visual verification target.