JPH07218572A - Printed wiring board inspection apparatus - Google Patents

Abstract

PURPOSE:To provide an inexpensive printed wiring board inspection apparatus by which positioning of up and down probe jigs can be carried out at high precision. CONSTITUTION:A printed wiring board inspecting apparatus has an inspecting part to carry out inspection by approaching probe jigs 11, 12 nearer each other from up and down of the printed wiring board and a position adjusting part 20 to position the probe jigs 11, 12. The probe jigs 11, 12 are set in adaptors 13, 14 having positioning tools. Pressed traces of the inspection probes of the first probe jig 11 are formed on a check sheet 30 on the position adjusting part 20, the position of the second probe jig 12 is so adjusted as to make the processed traces coincide with the inspection pad of a printed wiring board 7, and while being kept as it is, the jig 12 is fixed in the second adaptor 14. Both probe jigs 11, 12 are well positioned to coincide by making the positions of both adaptors 13, 14 coincide with each other by the inspecting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection device for inspecting a printed wiring board by bringing an inspection probe into contact with the printed wiring board.

[0002]

2. Description of the Related Art As a method for inspecting a wiring circuit on a printed wiring board for the presence or absence of electrical continuity and its apparatus, various types have been proposed (for example, Japanese Patent Publication No.
No. 44035, JP-A-56-11060). As a conventional stylus jig for a printed wiring board, as shown in FIGS. 7 and 8, a probe 92 is brought into contact with a wiring circuit 75 of the printed wiring board 7 from upper and lower surfaces 71 and 72. Therefore, there is one that inspects the presence or absence of electrical continuity.

The other end 921 of the probe 92 is connected to a tester 93 for detecting electrical continuity via a lead wire 95 as shown in FIG. When inspecting the electrical continuity of the printed wiring board 75, the stylus jig 9 on which the probe 92 is mounted is attached from above and below the printed wiring board 7.
0 and 91 are lowered and raised, and the probe 92 is brought into contact with the inspection pad of the printed wiring board 75. At this time, if the printed wiring board 75 is not broken or short-circuited, normal electrical conduction is obtained. As a result, the quality of each printed wiring board 75 can be determined.

Prior to carrying out such an inspection, the stylus jigs 90 and 91 are attached to a lifting device 99 such as a press machine as shown in FIG. The reference coordinate position of is adjusted. If the reference coordinates of the upper and lower stylus jigs 90, 91 do not match, even if the probe 92 of one stylus jig 90, 91 comes into contact with the inspection pad, This is because the probe 92 does not contact the inspection pad and causes an inspection error.

The adjustment of the reference coordinate positions of the stylus jigs 90 and 91 is performed as follows. The first method is a method of adjusting it visually and manually. In this method, the stylus jigs 90 and 91 are mounted on an elevating device, a probe is brought into contact with an actual inspection wiring pattern, and the contact state is visually observed to adjust the attachment position of the stylus jig. It is a thing.

The second method is to install an automatic alignment device for adjusting the position in each lifting device and automatically adjust the coordinate position of the stylus jig. The above-mentioned automatic alignment device automatically adjusts the attachment position of the stylus jig, for example, by an optical system and an actuator, so that the recognition marks of the coordinate position provided on the stylus jig coincide with each other. There is.

[0007]

However, the adjustment of the coordinate position between the stylus jigs in the conventional printed wiring board inspection method has the following problems. First by visual inspection and human
In this method, attach the stylus jig to the lifting device and bring the probe into contact with the wiring pattern for inspection.If there is a deviation, change the mounting position of the stylus jig and re-apply the probe to the wiring pattern. Repeat the process of contact.

Since the attachment position of the stylus jig is adjusted by such trial and error, it takes time to make the adjustment. Since the inspection device cannot be used during this period, the operation rate of the inspection device is reduced. Further, there is a problem that productivity is reduced and lead time is lengthened due to such a long setup time. In addition, there is a problem in that the accuracy of coordinate position adjustment is not uniform and the accuracy is not always good, especially with respect to higher density of printed wiring boards.

On the other hand, the second method of installing the automatic alignment device on each lifting device has a problem that the equipment cost is significantly increased. And the automatic alignment device
The operating rate is extremely low because it is used only during setup before actual inspection of the printed wiring board.

Further, there is a problem that vibrations and the like are transmitted to the automatic alignment device when the elevating device is in operation, and the automatic alignment device having a complicated mechanism is likely to fail. In view of such conventional problems, the present invention intends to provide a printed wiring board inspection device capable of accurately and easily performing coordinate position alignment of upper and lower stylus jigs and having a high capital investment efficiency. It is a thing.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a stylus jig having a test probe that can be advanced and retracted is brought closer to both the upper and lower surfaces of the printed wiring board, and the test probe is brought into contact with the printed wiring circuit so that An inspection device for a printed wiring board, comprising: an inspection unit for determining pass / fail; and a position adjusting unit for aligning horizontal coordinate positions between the upper and lower stylus jigs as a setup process. First and second stylus jigs that are close to the printed wiring board from different directions, and first and second stylus jigs that can be attached to and detached from the inspection unit
A second adapter, and the first adapter and the second adapter are provided with a fitting tool for matching the horizontal coordinate positions of the two adapters by connecting them to each other. The probe surface of the second stylus jig attached to the 2 adapter is fitted into the alignment hole provided in the printed wiring board, so that the printed wiring board is placed and held at the position corresponding to the inspection probe. The alignment pin is erected, and the second adapter of the second adapter
There is some degree of freedom in the mounting position of the stylus jig.
On the other hand, the position adjustment unit holds a base on which the second adapter is installed and a second stylus jig attached to the second adapter, and is capable of adjusting a horizontal position with respect to the second adapter. A holding sheet for holding the check table on the upper surface of the adjustment table and the printed wiring board held by the alignment pin on the second stylus jig on the adjustment table, and integrally arranged with the second adapter. The check sheet has a light-transmitting film and a pressure-sensitive transfer sheet releasably attached to the upper surface of the film. In the position adjusting unit, the second stylus jig on which the printed wiring board to be inspected is mounted is held on the adjustment table, the check sheet is held on the sheet holding member, and then the first stylus jig is mounted. First Adapt A first setup step for removing the first adapter after pressing the inspection lobe of the first stylus jig against the check sheet by aligning the position with the aligning tool to the second adapter on the base. Then, after peeling the transfer sheet from the check sheet, an adjustment table is set so that the pressing trace of the inspection probe transferred on the film is aligned with the center of a predetermined inspection pad of the printed wiring board on the second stylus jig. And a second setup step of fixing the second stylus jig to the second adapter, and thereafter, the first adapter having the first stylus jig attached thereto and the second stylus. A second aspect of the present invention is an inspection apparatus for a printed wiring board, characterized in that the second adapter having the needle jig attached thereto is moved to an inspection section to inspect the printed wiring board.

In the present invention, the most important point is that the inspection apparatus of the present invention aligns the coordinate position of the stylus jig with the inspection unit for inspecting the printed wiring board as a setup process. And a position adjusting part of In addition,
It is preferable to provide one position adjusting unit for a plurality of inspection units. In a general manufacturing process, the setup process takes a shorter time than the inspection execution process.
This is because by having the individual position adjusting parts, the setup process can be sufficiently digested, and the operation rate of the position adjusting parts can be increased.

The second most noticeable point in the present invention
The point is that the upper and lower stylus jigs are attached to adapters that can be attached to and detached from the inspection unit, and both adapters have aligning tools that match their coordinate positions. In the above-mentioned fitting tool, for example, a convex member or a concave member that closely fits is provided in the adapter, and the convex member of one adapter is fitted into the concave member of the other adapter so that the coordinate positions of each other are adjusted. There is something to match.

Third aspect of the present invention which is most noteworthy
The point is that at least one of the above-mentioned adapters (hereinafter referred to as "second adapter") is fitted into a positioning hole provided in the printed wiring board so that the printed wiring board is positioned at a position corresponding to the inspection probe. The positioning pin for mounting and holding is placed upright on the second adapter, and the mounting position of the second stylus jig in the second adapter (stylus jig to be mounted in the second adapter, the same applies below). Means that some degree of freedom is provided.

That is, in the printed wiring board to be inspected,
An alignment hole is provided in advance for reference alignment, while the second adapter is fitted in the alignment hole so that the inspection probe can be aligned with the inspection pad of the printed wiring board. Is provided. The attachment position of the second probe jig to the second adapter has a degree of freedom that can be slightly changed.
Such a degree of freedom can be realized, for example, by making the insertion hole of the tightening bolt for fixing the stylus jig a playful stupid hole.

The fourth most noticeable point in the present invention
The point is that the position adjusting unit has an adjustment table capable of adjusting the position of the second probe jig attached to the second adapter fixed to the base. That is, the position of the second probe jig can be adjusted by the adjustment table, and then the second probe jig can be fixed to the second adapter. This is because some degree of freedom is provided at the mounting position of the second stylus jig as described above.

Fifth of the most remarkable in the present invention
The point is that the second stylus jig held by the adjustment table has a sheet holding member for holding the check sheet on the upper surface of the printed wiring board held by the alignment hole. The sheet holding member is provided integrally with the second adapter. The check sheet has a pressure-sensitive peelable transfer sheet attached to the upper surface of a translucent film. The transfer sheet is a pressure sensitive sheet that transfers a dye or the like such that a pressed point (pressure sensitive point) is visible like a carbon sheet.

Sixth of the most remarkable in the present invention
The point is that the setup process consists of the following two processes. First
In the process, the second stylus jig on which the printed wiring board to be inspected is placed on the upper surface (probe surface) is held on the adjustment table, and the check sheet is further held on the sheet holding member, and then the first stylus jig is set. The mounted first adapter is brought close to the second adapter. Then, after the inspection probe of the first stylus jig is pressed against the check sheet, the first adapter is removed.

In the subsequent second step, the transfer sheet is peeled off from the check sheet, the film is exposed, and the pressure mark of the inspection probe transferred onto the film causes the imprint of the printed wiring board on the second stylus jig. Operate the adjustment table to match the test pad.

The position adjusting section is preferably provided with an observing section for observing the positional relationship between the pressing trace of the inspection probe on the film and the inspection pad of the printed wiring board on the second probe jig. This makes it easy to align the pressure mark with the inspection pad. The above observation section
The positional relationship between the pressing trace and the inspection pad can be clearly or easily observed. For example, the image may be enlarged, an optical path may be formed so that the image can be seen from directly above, or the observation position can be moved.

[0021]

In the present invention, the stylus jig is attached to the adapter which is detachable from the inspection section. Then, the adapters can be accurately and easily aligned with each other by the aligning tool. . Therefore, if you adjust the position of the stylus jig with the position of the adapter in the position adjustment unit, move it to the inspection unit with the adapter as it is, and adjust the position of the adapter again,
The coordinate positions between the stylus jigs also match in the relocated inspection unit.

Next, the alignment of the stylus jigs by the position adjusting unit will be described. The second adapter is fixed to the base, and the second stylus jig is not fixed to the second adapter but held on the adjustment table. The printed wiring board to be inspected is held on the upper surface of the second stylus jig by the positioning pins and the positioning holes. As a result, the inspection probe of the second probe jig and the inspection pad of the printed wiring board are aligned with each other.

Further, a check sheet is held on the upper surface of the printed wiring board by a sheet holding member. In this state, adjust the coordinate position from the top of the second adapter to the first
Move the adapter closer. This coordinate position alignment can be easily performed by connecting the alignment tool.

Then, the tip of the inspection probe of the first probe jig is pressed against the check sheet held on the upper portion of the second probe jig, so that the tip of the inspection probe presses the transfer sheet, The impression mark is formed on the film below. That is, a large number of point-like pressure marks representing the position of the inspection probe of the first stylus jig are formed on the film in dots (first step).

Next, when the transfer sheet is removed, the surface of the film is exposed and the pressure mark of the inspection probe becomes visible. On the other hand, since the film is translucent, the pattern surface of the printed wiring board can also be seen from above through the film. As a result, it is possible to visually recognize the positional relationship between the pressing trace and the inspection pad of the printed wiring board, for example, the presence or absence of displacement.

The printed wiring board (stylus jig)
Since the position can be changed by the adjustment table, it is possible to operate the adjustment table so that the pressing mark and the inspection pad coincide with each other, and the positional deviation between the two can be eliminated. This state means that if the positions of the first and second adapters are combined, the position of the inspection probe of the first stylus jig with respect to the inspection pad of the printed wiring board will be completely matched.

On the other hand, the position of the printed wiring board with respect to the second stylus jig is also aligned by the alignment holes of the alignment pins as described above. Therefore, the positions of the inspection probes of the first and second stylus jigs with respect to the printed wiring board in the position adjusting unit are the same.

By fixing the second stylus jig to the second adapter in this state, it is possible to hold the position of the stylus jig in the second adapter. Then, the second adapter in the above state is removed from the position adjusting unit, attached to the inspection unit, and the position is adjusted by the aligning tool of the first and second adapters. The alignment state of is reproduced.

As described above, in the present invention, by using the adapter and the position adjusting section, it is possible to accurately and easily position the stylus jig in the inspection section. Further, the position adjustment of the stylus jig in the position adjusting section is performed with reference to the printed wiring board to be inspected, which is extremely practical and effective.

For example, even if the pattern of the printed wiring board to be manufactured is deviated from the design value, the position of the stylus jig can be adjusted so as to match it. Further, the adapter and the position adjusting unit can be configured by relatively simple and inexpensive members and devices without using expensive devices such as an automatic alignment device (see the embodiment described later).

The inspection apparatus of the present invention is independent of the inspection unit for inspecting the printed wiring board and the position adjusting unit for aligning the stylus jig as a setup process. Therefore, the inspection does not stop due to the positioning of the stylus jig, and both parts can operate in parallel, improving the overall operation rate and improving productivity.

Further, the position adjustment of the stylus jig is performed in a dedicated position adjusting section according to a fixed procedure rather than trial and error, so that the setup time for the position adjustment is shortened, In addition, the accuracy can be improved. As described above, according to the present invention, it is possible to provide a printed wiring board inspecting device that can accurately and easily perform coordinate positioning of the upper and lower stylus jigs and that has a good investment efficiency of equipment. be able to.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A printed wiring board inspection apparatus according to an embodiment of the present invention will be described with reference to FIGS. In this example,
As shown in FIG. 2, the stylus jigs 11 and 12 having the inspection probe 15 projecting forward and backward are brought closer to each other from the upper and lower surfaces of the printed wiring board 7, and the inspection probe 15 is brought into contact with the printed circuit to print wiring. Inspection unit 10 for determining the quality of the plate 7
In addition, as shown in FIG. 1, the setup process is a device for inspecting a printed wiring board having a position adjusting unit 20 for aligning the coordinate positions in the horizontal direction between the upper and lower stylus jigs 11, 12.

As shown in FIG. 2, the inspection unit 10 can be detached from the inspection unit 10 by mounting the first and second stylus jigs 11 and 12 close to the printed wiring board from different directions. It has first and second adapters 13 and 14. Then, the first adapter 13 and the second adapter 14 are provided with fittings 16 and 17 for connecting the adapters 13 and 14 with each other so that the coordinate positions of the two adapters 13 and 14 coincide with each other.

The probe surface 121 (FIG. 2) of the second stylus jig 12 mounted on the second adapter 14 is aligned with the printed wiring board 7 as shown in FIGS. By fitting in the holes 71 (FIG. 3), the positioning pins 122 for mounting and holding the printed wiring board 7 at the position corresponding to the inspection probe 15 are provided upright. Further, a slight degree of freedom is provided at the mounting position of the second probe jig 12 on the second adapter 14.

On the other hand, the position adjusting section 20, as shown in FIG. 1, holds a base 21 for fixing the second adapter 14 and a second stylus jig 12 mounted on the second adapter 14, 2 A check sheet 30 is held on the upper surface of the adjustment table 22 capable of adjusting the horizontal position with respect to the adapter 14 and the printed wiring board 7 held by the second pin jig 12 on the adjustment table 22 by the positioning pin 122. The sheet holding member 2 disposed integrally with the second adapter 14
3 and 3. As shown in FIG. 4, the check sheet 30 has a translucent film 31 and a pressure-sensitive transfer sheet 32 releasably attached to the upper surface of the film 31.

Then, in the first setup process of the inspection apparatus, as shown in FIG.
Second stylus jig 1 on which the printed wiring board 7 to be inspected is placed
2 is held on the adjustment table 22 and the check sheet 30 is held on the sheet holding member 23, and then the first adapter 13 on which the first stylus jig 11 is mounted is aligned with the aligning tools 16 and 17 to form a base. After the inspection probe 15 of the first stylus jig 11 is pressed against the check sheet 30 in the vicinity of the second adapter 13 on 21, the first adapter 13 is removed.

In the subsequent second setup process, after peeling off the transfer sheet 32 (FIG. 4) from the check sheet 30,
As shown in FIG. 5 (a), the pressure marks 331, 332 transferred onto the film 31 have predetermined positions on the printed wiring board 7 on the second probe jig 12 as shown in FIG. 5 (b). Adjustment table 2 so as to be fitted to the center of the inspection pads 721 and 722
2 is operated, and then the second stylus jig is fixed to the second adapter 14.

After that, the first adapter having the first stylus jig 11 mounted thereon and the second adapter 14 having the second stylus jig 12 mounted thereon are transferred to the inspection unit 10, and as shown in FIG. ，
The inspection of the printed wiring board 7 is executed. It should be noted that the position adjusting unit 20 is provided for each of the plurality of inspection units 10 once.

Further, the first adapter 13 and the second adapter 1
As shown in FIG. 1, the mating tools 16 and 17 with the projecting member 4 include a convex member (matching tool 17) protruding from the horizontal planes of both adapters 13 and 14, and a concave hole (fitting part) closely fitted to the convex member ( It is a fitting 16). The transfer sheet 32 of the check sheet 30 shown in FIG.
1 is colorless and transparent.

Next, a supplementary explanation on the above will be added.
The inspection unit 10 includes, as shown in FIG.
The stylus jigs 11 and 12 are attached via the adapters 13 and 14, and the inspection probe 15 is brought into contact with the printed wiring board 7 from both upper and lower sides to inspect the printed wiring board 7.

The upper and lower adapters 13 and 14 are the fittings 1
By fitting 6 and 17, mutual coordinate positions can be accurately matched. And the stylus jigs 11 and 12
Are replaced according to the printed wiring board 7 to be inspected.
Further, the printed wiring board 7 is provided with a positioning hole 71 (FIG. 3) for determining the reference position thereof, and the second stylus jig 12 has a positioning pin to be fitted into the positioning hole 71. 122 (FIGS. 1 and 3) is formed, and the alignment between the two can be performed.

On the other hand, the position of the other pattern surface of the printed wiring board 7 and the first stylus jig 11 is adjusted by the position adjusting unit 20.
Is performed using. As shown in FIG. 1, the position adjusting unit 20 has an adjusting table 22 arranged on a base 21, and the adjusting table 22 can adjust a horizontal position with respect to the base 21 by an actuator 24. .

That is, the actuator 24 includes a first actuator 241 which moves in a balanced (X) direction and a second actuator 242 which moves in a parallel (Y) direction.
And a rotating third actuator 243, which allows the adjustment table 22 to move the stylus jig 12 in any direction on a horizontal plane.

On the upper surface of the base 21, the first set pin 21
1 is erected, while the second adapter 14 has a first set hole 14 that is closely fitted to the first set pin 211.
1 is provided. Further, a column-length fitting tool 17 is provided upright on the second adapter 14, and as described above, the fitting tool 17 is closely fitted to the fitting tool 16 (recessed hole) of the first adapter 13. be able to.

As shown in FIG. 3, the sheet holding member 23 for holding the check sheet 30 is provided with a fourth set hole 231. The fourth set hole 231 is closely fitted to the fitting tool 17. Thus, as shown in FIG. 1, it is placed and held on the second adapter 14. On the other hand, as shown in FIGS. 1 and 6, a second set pin 221 is provided upright on the upper surface of the adjustment table 22, and the second stylus jig 12 is provided with a second set pin 221 as shown in FIGS. A second set hole 123 that closely fits the second set pin 221 is formed.

As shown in FIG. 1, the first stylus jig 11 is provided with a third set pin 111, and the first adapter 13 is closely attached to the third set pin 111. A third set hole for fitting is formed. Further, the second stylus jig 12 is fixed to the second adapter 14 by a fixing screw (not shown), but its fixing position has a slight degree of freedom due to a stupid hole.

Next, the stylus jig 1 in the position adjusting section 20.
The procedure for aligning 1 and 12 will be described. First, as shown in FIG. 1, the first set pin 21 of the base 21 is
1 with the stylus jig 12 removed, the second adapter 1
The 4th 1st set hole 141 is fitted, and the 2nd adapter 14 is installed on the base 21.

Similarly, the second set pin 221 of the adjustment table 22 is connected to the second set hole 123 of the second probe jig 12.
(FIG. 6) is fitted and installed on the adjustment table 22. Then, the alignment pin 122 of the second stylus jig 12
The positioning hole 71 (FIG. 3) of the printed wiring board 7 is fitted to the printed wiring board 7 and the printed wiring board 7 is placed on the second probe jig 12.

Subsequently, the sheet holding member 23 to which the check sheet 30 is attached is placed and held on the second adapter 14 by using the fitting tool 17. And the third set pin 1
11 is fitted with the third set hole, the first stylus jig 11 and the first adapter 13 are united, and the first adapter 13 is
By fitting the mating tools 16 and 17, the mating tools 16 and 17 are placed on the second adapter 14.

As a result, the tip of the inspection probe 15 of the first stylus jig 11 is transferred to the transfer sheet 32 of the check sheet 30.
(FIG. 4) is pressed from the upper surface, and pressing marks 33 of the inspection probe 15 are formed on the upper surface of the film 31 of the check sheet 30 as shown in FIG. Then the first
The stylus jig 11 and the first adapter 13 are removed. Then, transfer sheet 32 of check sheet 30 to film 3
When peeled from No. 1, the pressing trace 33 is exposed on the film 31 as shown in FIG.

Subsequently, while observing the pressing mark 33 with a loupe or the like, the actuators 241 to 243 of the adjustment table 22 shown in FIG. 1 are operated, and the pressing mark 33 is printed on the printed wiring board as shown in FIG. 5B. 7 inspection pad 72
It is located at the center of 1,722. In this state, the fixing screw is tightened, and the second stylus jig 12 is attached to the second adapter 14
Fixed to.

Then, the set of the first stylus jig 11 and the first adapter 13 holding this state, and the second stylus jig 1
2 and the set with the second adapter 14 are attached to the inspection unit 10. After that, by fitting the fittings 16 and 17 and aligning the positions of both adapters 13 and 14, the position adjusting unit 20
The alignment state of the two stylus jigs 11 and 12 realized in 1 is reproduced in the inspection unit 10.

As described above, in this example, the adapters 13 and 1 are
By using 4 and the position adjusting unit 20, the position of the stylus jigs 11 and 12 in the inspection unit can be accurately adjusted and easily performed in accordance with the procedure. Since the above-mentioned alignment is performed with the printed wiring board to be inspected as a reference, even if there is an error in the pattern of the printed wiring board, it is not affected by this and it is extremely practical.

Further, since the alignment as the setup process in the position adjustment unit and the inspection execution process in the inspection unit can be performed in parallel, the equipment can be effectively operated. Further, the position adjusting unit 20 of this example is extremely inexpensive as compared with the one using the conventional automatic alignment device.

The position adjusting unit 20 can be shared by a plurality of inspection units 10. Therefore, the investment efficiency of the position adjustment unit 20 of this example is extremely good as compared with the conventional device in which the automatic alignment device is provided in the inspection unit one to one. As described above, according to the present embodiment, it is possible to provide a printed wiring board inspection apparatus that can accurately and easily perform coordinate alignment of upper and lower stylus jigs and that has a high investment efficiency of equipment. You can

[Brief description of drawings]

FIG. 1 is a front sectional view of an inspection device according to an embodiment.

FIG. 2 is a front cross-sectional view of an inspection unit of the inspection device according to the embodiment.

FIG. 3 is a plan view taken along the line AA of FIG. 1 (a state without a transfer sheet).

FIG. 4 is an explanatory diagram of a pressing process of the first stylus jig against the check sheet.

5A and 5B are explanatory views of the position alignment between the pressure mark on the film and the inspection pad (FIG. 5A is before the alignment, FIG. 5B is after the alignment).

FIG. 6 is an enlarged cross-sectional view of a connecting portion of each member in the position adjusting portion.

FIG. 7 is a front sectional view of a conventional printed wiring board inspection device.

FIG. 8 is a perspective view of a conventional printed wiring board inspection apparatus.

[Explanation of symbols]

 11,12. ． ． Stylus jig, 13, 14. ． ． Adapter, 20. ． ． Position adjustment unit, 30. ． ． Check sheet, 7. ． ． Printed wiring board,

Claims (6)

[Claims] 1. A test for determining the quality of a printed wiring board by bringing a stylus jig, which projects a test probe so as to be able to advance and retract, closer to the printed wiring board from above and below, and abutting the test probe on the printed wiring circuit. And a position adjusting unit for aligning horizontal coordinate positions between the upper and lower stylus jigs as a setup process. The inspection unit prints from different directions. It has first and second stylus jigs in the vicinity of the wiring board, and first and second adapters to which the first and second stylus jigs are attached and which can be attached to and detached from the inspection unit. In addition, the first adapter and the second adapter are provided with a fitting tool for matching the horizontal coordinate positions of the two adapters by connecting them to each other, and a second touch device attached to the second adapter. On the probe surface of the needle jig, print Alignment pins for placing and holding the printed wiring board in a position corresponding to the inspection probe by being fitted into the alignment holes provided in the wire board are provided upright, and the second contact of the second adapter is provided. A slight degree of freedom is provided in the attachment position of the needle jig, while the position adjustment unit includes a base on which the second adapter is installed and a second stylus jig attached to the second adapter. A check sheet on the upper surface of the printed wiring board that holds the tool and is capable of adjusting the position in the horizontal direction with respect to the second adapter, and the second stylus jig on the adjustment table that is held by the alignment pin. And a sheet holding member that is disposed integrally with the second adapter, and the check sheet is a translucent film and is peelably attached to the upper surface of the film. Pressure-sensitive transfer In the setup step, the position adjusting unit holds the second stylus jig on which the printed wiring board to be inspected is placed on the adjustment table, and the check sheet is a sheet holding member. After that, the first adapter with the first stylus jig is attached to the second adapter on the base by aligning the position with the above-mentioned fitting tool, and the inspection lobe of the first stylus jig is checked above. After the first setup step of removing the first adapter after pressing the sheet, and after the transfer sheet is peeled from the check sheet, the pressing trace of the inspection probe transferred on the film is on the second probe jig. Operate the adjustment table so that it matches the center of the specified inspection pad on the printed wiring board,
After that, there is a second setup step of fixing the second stylus jig to the second adapter, and then the first adapter having the first stylus jig attached thereto and the second stylus jig. A device for inspecting a printed wiring board, wherein the above-mentioned second adapter having the above-mentioned mounted thereon is moved to an inspection section to inspect the printed wiring board. 2. The position adjusting unit according to claim 1,
An inspection device for a printed wiring board, wherein one inspection device is provided for a plurality of inspection units. 3. The position adjusting section according to claim 1 or 2, wherein the position adjusting portion is a pressing mark of the inspection probe on the film and a second mark.
An inspection apparatus for a printed wiring board having an observation unit for observing a positional relationship between the inspection pad and the printed wiring board on the stylus jig. 4. The inspection apparatus for a printed wiring board according to claim 3, wherein the observation section is a magnifying glass having an image magnifying function. 5. The fitting of the first adapter and the second adapter according to claim 1 to 3 or 4,
An inspection device for a printed wiring board, comprising: a convex member protruding from the horizontal surface of both adapters; and a concave portion closely fitted to the convex member. 6. The printed wiring board inspecting device according to claim 1, wherein the transfer sheet of the check sheet is carbon paper, and the film is colorless and transparent.