JPH05340984A - Tester for printed wiring board - Google Patents

Abstract

PURPOSE:To obtain a tester for printed wiring board in which short circuit or opening of wiring can be tested positively in a printed wiring board on which relatively rough pattern and fine pattern are formed mixedly. CONSTITUTION:The tester for printed wiring board comprises a test data reading means 11, a jig moving position indicating means 12, means 13 for selecting a connecting terminal based on test data thus read out, a test results reading means 14, and a pass/fail decision means 15. The tester further comprises a test results memory means 16 and test results output means 17 provided at a control section 1, a connecting terminal switching section 2, a section 3 for measuring resistance between switched connecting terminals, a plurality of jig driving means 4, and a plurality of test jigs 5a, 5b mounted on the jig driving means 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a printed wiring board testing device. In particular, it is an object of the present invention to provide a printed wiring board test device capable of reliably testing the presence or absence of a short circuit between wirings or a disconnection of wirings in a printed wiring board in which a pattern having a relatively large pitch and a fine pattern are mixed. And to improve.

[0002]

2. Description of the Related Art In recent years, miniaturization of electronic equipment has progressed, and miniaturization of components mounted on a printed wiring board used in the electronic equipment has been promoted. As a result, a fine pattern for surface mount components and a pattern having a relatively large pitch such as through holes are often mixed in the same printed wiring board.

A conventional printed wiring board testing apparatus for inspecting such short circuits between wirings of a printed wiring board and disconnection of wirings will be described below with reference to the drawings.

FIG. 6 shows the structure of a conventional printed wiring board testing apparatus, and FIG. 7 is an explanatory view of the relationship between a test jig of this testing apparatus, a fine pattern and a through hole of a printed wiring board under test.

Referring to FIGS. 6 and 7, 1_oRead the test data, test jig
5_oWhen you specify the position to move,
Test jig 5 based on the test data_oProvided in
Connection terminal 51_oSelect the connection terminal to be used for the test from
Output the selected results, load the test results, and
Has a function to judge the quality of the result and output the judgment result.
It is a control unit that does. Two_oIs the control unit 1_oOutputs
Based on the connection terminal selection signal,
It is a connection terminal switching unit that switches the connection. Three_oIs
This connection terminal switching unit 2_oConnection switched by
Measure the resistance value between the connection terminals and control the result as above.
Part 1_oIt is a resistance measuring unit that outputs to. Four_oIs the control unit 1
_oTest jig 5 at the position indicated by_oMove the test jig 5 _o
Connection terminal 51 provided on_oAnd test pair of printed wiring board 8
Elephant (Comparative pitch such as fine pattern A and through holes)
Jig drive for connecting with large pattern B) by pressure welding etc.
It is a means of movement. 5_oIs this jig driving means 4_oAttached to
This test jig 5_oIs shown in Figure 7.
And a fine pattern A and a pattern B such as a through hole
Be connected to at the same time. 7_oPrinted wiring board test equipment
In the test data memory that stores the test data input to
is there.

Next, the operation of the above-mentioned printed wiring board test apparatus is performed.
Describe the work. First, the control unit 1_oIs the test data
Mori 7_oTo the coordinates of two points to be tested on the printed wiring board 8
And whether these two points should be conducting or non-conducting
Read. Jig driving means 4 _oBy jig 5_oMoved
Jig 5_oConnection terminal 51 provided on_oDue to pressure contact, etc.
Connected to the test object. Control unit 1 above_oRead above
Connect to two points to be tested based on the included test data
Selected connection terminal, and based on the selection result
Connection terminal switching unit 2_oIs the contact between the connection terminal and the measurement circuit.
When the continuation is switched, the resistance measuring unit 3_oBetween this connection terminal
The resistance value is measured, and the result is measured by the control unit 1._oOutput to. Control
Part 1_oThe above-mentioned read test data and measurement results
The result of comparison is judged, and the quality is judged and the judgment result is stored. More movement
Product is control unit 1_oBased on the test data read by
It is executed sequentially. When the test is completed, the above judgment result is displayed.
I will be forced.

[0007]

As described above, in the printed wiring board testing apparatus according to the prior art, a single test jig simultaneously produces a fine pattern and a pattern having a relatively large pitch such as a through hole. Connected. However, since the process of forming the fine pattern on the substrate and the process of processing the through holes are separate processes, there is a difference in manufacturing error between the two processes, which causes the printed wiring board test according to the related art. In the equipment, when the connection terminal of the test jig is fitted to either one of the fine pattern and the pattern of through hole, etc., the connection terminal is often not fitted to the other, and it is extremely difficult to test all test objects. It has the drawback of being difficult.

It is an object of the present invention to eliminate this drawback, and it is possible to ensure the presence or absence of short circuits between wirings or disconnection of wirings in a printed wiring board in which a pattern having a relatively large pitch and a fine pattern are mixed. An object of the present invention is to provide a printed wiring board testing device capable of testing.

[0009]

The above object can be achieved by any of the following means. The first means is a test data reading means (11), a jig moving position instructing means (12) for instructing a position to move a test jig, and test data read by the test data reading means (11). Connection terminal selection means for selecting connection terminal based on (13)
And a test result reading means (14), a pass / fail judgment means (15) for judging pass / fail of the result read by the test result reading means (14), and a result judged by the pass / fail judgment means (15). In response to the output of the control unit (1) having the test result storage means (16) and the test result output means (17) for outputting the stored test result, and the connection terminal selection means (13). A resistance for outputting a test result to the control unit (1) by measuring a resistance value between the connection terminal switching unit (2) for switching the connection terminals and the connection terminals switched by the connection terminal switching unit (2). Measuring unit (3)
And a plurality of jig driving means (4) for driving the test jig in response to the output of the jig moving position designating means (12) and connecting the test jig and the test object, and the jig. Drive means (4)
A plurality of test jigs (5a) and (5
It is a printed wiring board test device which has b).

The second means is to read the test data reading means (11), the jig moving position instructing means (12) for instructing the position to move the test jig, and the test data reading means (11). A connection terminal selecting means (13) for selecting a connection terminal based on the test data, a test result reading means (14), and a pass / fail judgment means (judge) for judging whether the result read by the test result reading means (14) is good or bad. 15), a test result storage means (16) for storing the result judged by the quality judgment means (15), and a test result output means (17) for outputting the stored test result (1). )When,
A connection terminal switching unit (2a or 2b) for switching the connection terminal in response to the output of the connection terminal selection means (13).
A resistance measuring unit (3) for measuring a resistance value between the connection terminals switched by the connection terminal switching unit (2a or 2b) and outputting a test result to the control unit (1); A jig driving means (4) for driving the test jig in response to the output of the jig moving position indicating means (12) to connect the test jig and the test object, and the jig driving means (4).
Of a printed wiring board testing apparatus consisting of a plurality _{(T a) · (T b} ) of a test fixture to be attached to each (5a or 5b) and tester with.

[0011]

In the printed wiring board testing apparatus according to the present invention, the test jig for testing a fine pattern and the test jig for testing a pattern having a relatively large pitch such as through holes are separated from each other. However, since it is said that the former tests fine patterns and the latter tests patterns such as through holes, even if there are differences in manufacturing error due to different manufacturing processes of printed wiring boards, The test object can be accurately tested.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A printed wiring board test apparatus according to a second embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a printed wiring board test apparatus according to a first embodiment (corresponding to claim 1). In FIG. 1, reference numeral 11 is a test data reading means for reading the coordinates of two points to be tested on the printed wiring board and the test data indicating whether the two points should be conductive or non-conductive. Reference numeral 12 is a jig moving position instructing means for instructing a position to move the test jig. Reference numeral 13 is a connection terminal selection means for selecting a connection terminal connected to the test object to be tested from the connection terminals connected to the test object based on the read test data. Reference numeral 14 is a test result reading means. 15 is this test result reading means 14
Is a quality determination means for determining quality of the read result. Reference numeral 16 is a test result storage means for storing the result judged by the pass / fail judgment means 15, and reference numeral 17 is a test result output means for outputting the stored test result. Reference numeral 1 is a control unit having the respective means 11 to 17 described above. Reference numeral 2 denotes a connection terminal switching unit that switches the connection between the connection terminal and the measurement circuit in response to the output of the connection terminal selection means 13.
Reference numeral 3 is a resistance measuring unit that measures the resistance value between the connection terminals switched by the connection terminal switching unit 2 and outputs the result to the control unit 1. Reference numeral 4 is a jig driving means for driving the test jig in response to the output of the jig moving position indicating means 12 and connecting the test jig and the test object. Reference numeral 5a is a test jig attached to the jig driving means 4 and corresponding to the test data A, and 51a is a connection terminal of the test jig 5a. 5b is a test jig which is mounted on the jig driving means 4 and corresponds to the test data B, and 51b is a connection terminal of the test jig 5b. The test data A corresponds to, for example, a fine pattern, and the test data B corresponds to, for example, a pattern having a relatively large pitch such as a through hole. Reference numeral 7a is a test data A memory that stores the test data A that is input to the printed wiring board test apparatus, and 7b is a test data B memory that stores the test data B that is input to the printed wiring board test apparatus. Reference numeral 8 is a printed wiring board.

FIG. 2 shows the above-described test jigs 5a and 5b and the fine pattern A and through hole B of the printed wiring board 8 under test.
FIG. 51a and 51b are connection terminals (see FIG. 2).

Next, the operation of the printed wiring board testing apparatus according to this embodiment will be described. 3 and 4 are flowcharts for explaining the operation. 3 and 4, the test data reading means 11 reads the test data A (a).

In response to the output of the jig moving position indicating means 12, the jig driving means 4 moves the test jig 5a to connect the connection terminal of the jig 5a to the test object A (b). In response to the output of the connection terminal selection means 13, the connection terminal switching unit 2 switches the connection between the connection terminal and the measuring circuit (c).

The resistance measuring unit 3 measures the resistance value between the connection terminals (d). The test result reading means 14 reads the above resistance value measurement result (e). The quality of the read test result is determined and the determination result is stored (f).

It is judged whether or not the test based on the test data A is completed, and if not completed, the above (c) and the subsequent steps are repeated (g). If the test is completed, the test data reading means 11 reads the test data B (h).

In response to the output of the jig moving position designating means 12, the jig driving means 4 moves the test jig 5b to connect the connection terminal of the jig 5b to the test object B (i). In response to the output of the connection terminal selecting means 13, the connection terminal switching unit 2 switches the connection between the connection terminal and the measuring circuit (j).

The resistance measuring unit 3 measures the resistance value between the connection terminals (k). The test result reading means 14 reads the resistance value measurement result (1). The quality of the read test result is determined and the determination result is stored (m).

It is judged whether or not the test based on the test data B is completed, and if not completed, the above steps (j) and thereafter are repeated (n). If the test is completed, the stored test result is output (o).

FIG. 5 shows a second embodiment (corresponding to claim 2).
FIG. 3 is a configuration diagram of a printed wiring board test device according to the present invention. This example is
The difference from the first embodiment is that in this embodiment, the print
The tester T that the wiring board tester corresponds to the test data A_a
And the tester T corresponding to the test data B _bConsists of
It is a point.

In FIG. 5, T _a is a tester corresponding to the test data A, and T _b is a tester corresponding to the test data B. Each tester has a control unit 1, a connection terminal switching unit 2a or 2b, a resistance measuring unit 3, a jig driving unit 4, and a test jig 5a.
Or 5b. Each test jig 5a or 5b is provided with a connection terminal 51a or 51b. The description of each means included in the control unit 1 is the same as that of the first embodiment, and therefore the description thereof is omitted to avoid redundancy. Reference numeral 2a is a connection terminal switching unit for switching the connection between the connection terminal 51a corresponding to the test data A and the measurement circuit,
Reference numeral 2b is a connection terminal switching unit for switching the connection between the connection terminal 51b corresponding to the test data B and the measurement circuit. The description of the other symbols is the same as in the case of the first embodiment.

Next, the operation of this embodiment will be described. First, test data reading means 11 of the tester T _a is read test data A, the test data reading means 11 of the tester T _b to complete the test based on the test data A read test data B. The test execution operation after reading each test data is the same as in the first embodiment.

It is also possible to connect one of the test jigs from below the substrate and connect the other test jig from above the substrate. In this case, the test can be shortened because the tests can be performed in parallel from above and below the substrate.

It is also possible that the tester T _a in the second embodiment is _a probe moving type tester and the tester T _b is a grid type tester in which connecting terminals are arranged at intersections of the grid. In this case, the versatility of the printed wiring board test device can be improved.

[0027]

As described above, the printed wiring board testing apparatus according to the present invention is mounted on the control section, the connection terminal switching section, the resistance measuring section, the plurality of jig driving means, and the respective jig driving means. It has a plurality of test jigs, or is composed of a plurality of test machines having a control section, a connection terminal switching section, a resistance measuring section, a jig driving means, and a test jig attached to the jig driving means. Therefore, the test jig is divided into a test jig for testing a fine pattern on the printed wiring board and a test jig for testing a pattern with a relatively large pitch such as through holes. Test jig can be used. As a result, it is possible to reliably connect the test jig and the test target even if there is a difference in manufacturing error between the formation of the fine pattern and the through hole processing which are different in the manufacturing process of the printed wiring board.

Therefore, according to the present invention, the printed wiring board test can surely test whether or not there is a short circuit between the wirings or the disconnection of the wirings in the printed wiring board in which the patterns having a relatively large pitch and the fine patterns are mixed. A device can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a printed wiring board test apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory view of the relationship between the connection terminals and the test object of the printed wiring board test apparatus according to the first embodiment of the present invention.

FIG. 3 is a flowchart of the operation of the printed wiring board test apparatus according to the first embodiment of the present invention.

FIG. 4 is a flowchart of the operation of the printed wiring board test apparatus according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a printed wiring board test apparatus according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a printed wiring board test apparatus according to a conventional technique.

FIG. 7 is an explanatory diagram of a relationship between a connection terminal and a test target of a printed wiring board test device according to a conventional technique.

[Explanation of symbols]

1 control unit 2 2a 2b connection terminal switching unit 3 resistance measuring unit 4 jig driving unit 5 5a 5b test jig 7a 7b test data memory 8 printed wiring board 11 test data reading unit 12 jig movement position instruction means 13 connecting terminal selection unit 14 test results read unit 15 quality determination unit 16 test result storage means 17 test result output unit 51a · 51b connecting terminal T _a · T _b tester 1 _o controller (prior art) 2 _o connection terminal switching Part (prior art) 3 _o resistance measuring part (prior art) 4 _o jig driving means (prior art) 5 _o test jig (prior art) 51 _o connection terminal (prior art) 7 _o test data memory (prior art)

Claims (2)

[Claims] 1. Based on test data reading means (11), jig moving position instructing means (12) for instructing a position to move a test jig, and test data read by the test data reading means (11). Connection terminal selecting means (13) for selecting a connection terminal by means of the test result reading means (14),
A pass / fail judgment unit (15) for judging pass / fail of the result read by the test result reading unit (14), and the pass / fail judgment unit (1)
Test result storage means (16) for storing the result judged by 5)
And a control unit (1) having a test result output unit (17) for outputting the stored test result, and a connection terminal switching unit for switching the connection terminal in response to the output of the connection terminal selection unit (13). (2), a resistance measuring unit (3) for measuring a resistance value between the connection terminals switched by the connection terminal switching unit (2) and outputting a test result to the control unit (1), A plurality of jig driving means (4) for driving the test jig in response to the output of the tool movement position indicating means (12) and connecting the test jig and the test object, and the jig driving means (4). A printed wiring board test apparatus having a plurality of test jigs (5a) and (5b) attached to each of the above. 2. Based on test data reading means (11), jig moving position instructing means (12) for instructing a position to move a test jig, and test data read by the test data reading means (11). Connection terminal selecting means (13) for selecting a connection terminal by means of the test result reading means (14),
A pass / fail judgment unit (15) for judging pass / fail of the result read by the test result reading unit (14), and the pass / fail judgment unit (1)
Test result storage means (16) for storing the result judged by 5)
And a control unit (1) having a test result output unit (17) for outputting the stored test result, and a connection terminal switching unit for switching the connection terminal in response to the output of the connection terminal selection unit (13). (2a or 2b)
A resistance measuring unit (3) for measuring a resistance value between the connection terminals switched by the connection terminal switching unit (2a or 2b) and outputting a test result to the control unit (1); In response to the output of the movement position designating means (12), the test jig is driven, and the jig driving means (4) for connecting the test jig and the test object and the jig driving means (4) are respectively provided. a plurality of tester having a mounting tEST fixture (5a or 5b) (T _a) ·
A printed wiring board testing device comprising (T _b ).