JPH045023Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board testing device for testing the presence or absence of electrical continuity in a circuit network on a printed circuit board.

In general, printed circuit boards may be provided with semiconductor component mounting terminals for mounting semiconductor components such as ICs and LSIs.

FIG. 1 shows an example of such a printed circuit board 1, in which a plurality of semiconductor component mounting terminals (hereinafter simply referred to as mounting terminals) 2... are connected to semiconductor components (e.g.
Narrow pitch P to match the foot placement of the 16-pin IC)
(for example, about 0.1 inch) and are arranged in two rows. Also, from each mounting terminal 2..., independently separated circuit conductors 3... are drawn out,
Further, at the other end of the circuit conductor 3... are arranged with a wider pitch than the mounting terminals 2..., and
Connection terminals 4 larger than the mounting terminals 2 are provided.

Conventionally, when conducting a continuity test of the circuit conductors 3 of such a printed circuit board 1, the plurality of mounting terminals 2... are short-circuited with a conductive rod or the like, and the conductive rod and the connection terminal are connected to each other. A method was used to check continuity between each of the 4.

However, in such a conventional method, unevenness of the mounting terminal 2... or printed circuit board 1
Short circuits caused by conductive rods become unstable due to warping of the conductive rods, making accurate inspection difficult, and short circuits between the circuit conductors 3... cannot be detected. There was a problem.

This invention was made in consideration of the above circumstances,
The object of the present invention is to provide a printed circuit board inspection device that can accurately and efficiently conduct a continuity test on a printed circuit board having minute terminals such as mounting terminals.

The present invention will be described below based on embodiments shown in the drawings.

2 to 5 show an embodiment of the present invention, and FIG. 2 shows an inspection apparatus applied to inspect a printed circuit board 1 having the mounting terminals 2 . . . . Reference numeral 5 in the figure is an insulating film made of polyester or the like, and this insulating film 5 is formed into a substantially trapezoidal shape as shown in FIG. On the lower surface thereof, a plurality of wiring conductors 6... are arranged in parallel from the short side to the long side, and the wiring conductors 6...
The one end portions 6a... are arranged in two rows in accordance with the arrangement of the mounting terminals 2..., and the mutual spacing between the one end portions 6a is the same as the pitch P of the mounting terminals 2... . Further, the wiring conductors 6...the other end portions 6b... are arranged in a line along the long side of the insulating film 5, and the mutual spacing between them is widened beyond the pitch P so that the connector conductors 7...
It will be arranged as follows. These wiring conductors 6 . . . and connector conductors 7 .

On the other hand, a plurality of contacts 8 protruding in a direction orthogonal to the insulating film 5 are provided at one end 6a of the wiring conductor 6. As shown in FIGS. 4 and 5, these contacts 8 are provided with a rod-shaped contact portion 8b at the tip of a spring portion 8a, and are soldered or otherwise attached to one end 6a of the wiring conductor 6. Fixed by Further, reference numeral 9 in the figure is a reinforcing plate for imparting rigidity to the vicinity of the short side of the insulating film, and reference numeral 10 is a support plate fixed to the insulating film 5 via a spacer 11. This support plate 1
0 is provided with a guide hole 10a into which the contact portion 8b of the contactor 8 is loosely inserted, and the contact portion 8b passes through the guide hole 10a and projects downward.

To explain how to use the printed circuit board inspection apparatus configured in this way, as shown in FIG. contact 8
. . . to directly face the mounting terminal 2 . . . of the printed circuit board 1. At this time, the contact 8... is the mounting terminal 2.
Since they are lined up at the same pitch as the pitches P of ......, by aligning the positions of any two contacts 8, 8, all contacts 8... and mounting terminals 2 can be connected.
... can be made to face each other directly. After that,
When the reinforcing plate 9 is pressed in the direction of the printed circuit board 1, the contacts 8 are prevented from wobbling laterally by the guidance of the guide holes 10a, and are expanded and contracted by the action of the spring portions 8a, so that the mounting Mounting terminals 2 regardless of unevenness of the terminals or warping of the printed circuit board 1.
Make sure to come into contact with... Therefore, in this state, the connection terminals 4 of the printed circuit board 1...
If another connector wired to the detector or another test contact etc. is brought into contact with the circuit conductor 3...
Continuity testing can be performed accurately and efficiently.

FIG. 6 shows another embodiment of the present invention, 28
This figure shows an insulating film 5' used for testing printed circuit boards having mounting terminals for pin ICs, and wiring conductors 6 formed on the surface thereof.

As explained above, according to the present invention, the presence or absence of electrical continuity between the semiconductor component mounting terminal provided on the printed circuit board and the connection terminal drawn out from the semiconductor component mounting terminal is inspected. In a printed circuit board inspection device, a plurality of wiring conductors are arranged in parallel on the surface of an insulating film, and the spacing between one end of the wiring conductor is the same as the pitch of the semiconductor component mounting terminal, and the spacing between the other end is the same as the pitch of the semiconductor component mounting terminal. is arranged wider than the pitch as a conductor for the connector, and
A plurality of contacts each having a rod-shaped contact portion at the tip of a spring portion located on the opposite side of the wiring conductor from the insulating film are attached to one end of the wiring conductor in a direction perpendicular to the insulating film. Provided prominently,
Since the plurality of contacts are brought into contact with the semiconductor component mounting terminal, the following effects can be obtained.

The efficiency of continuity testing of printed circuit boards can be improved by connecting terminals for mounting semiconductor components to connectors wired to detectors, etc.

Since continuity between each mounting terminal and each connection terminal can be checked, any short circuit between circuit conductors can be detected.

The above method also applies to printed circuit boards in which the semiconductor component mounting terminal is located at the far end of a long and narrow hole formed in a certain member, and a contact must be brought into contact with the semiconductor component mounting terminal through this long and thin hole. The rod-shaped contact portion can be inserted deep into the elongated hole, and a spring force can be applied to the semiconductor component mounting terminal to bring the contact into contact.

It is versatile because it can be applied to the inspection of any printed circuit board as long as it has the same pitch and number of semiconductor component mounting terminals as the legs of the semiconductor components.
For example, by preparing several types of devices according to the present invention that can be fitted into the same connector and inspecting them while exchanging them, printed circuit boards with various circuit patterns can be inspected.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a printed circuit board having terminals for attaching semiconductor components, FIGS. 2 to 5 show an embodiment of the present invention, FIG. 2 is a perspective view, and FIG. A plan view of the insulating film, FIG. 4 is a view along the - line of FIG. 2, and FIG. 5 is a plan view of the insulating film.
6 is a plan view of an insulating film illustrating another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Printed circuit board, 2... Terminal for mounting semiconductor components, 4... Connection terminal, 5, 5'... Insulating film, 6... Wiring conductor, 6a... One end, 6
b...Other end portion, 7...Conductor for connector, 8...Contactor, 8a...Spring portion, 8b...Contact portion.

Claims (1)

[Scope of utility model registration request] In a printed circuit board inspection device that inspects the presence or absence of electrical continuity between a semiconductor component mounting terminal 2 provided on a printed circuit board 1 and a connection terminal 4 pulled out from this semiconductor component mounting terminal, insulation A plurality of wiring conductors 6 are arranged in parallel on the surfaces of the conductive films 5, 5', and the spacing between one end portion 6a of the wiring conductor is the same as the pitch P of the semiconductor component mounting terminal, and the spacing between the other end portion 6b is the same as the pitch P of the semiconductor component mounting terminal. is arranged as a connector conductor 7 wider than the pitch, and a rod-shaped contact portion is provided at one end of the wiring conductor at the tip of a spring portion 8a located on the opposite side of the wiring conductor from the insulating film. A plurality of contacts 8 provided with 8b
A printed circuit board inspection apparatus characterized in that a plurality of contacts are provided to protrude in a direction orthogonal to the insulating film, and the plurality of contacts are brought into contact with the semiconductor component mounting terminals.