JPH04127066A - Signal terminal connection method and signal terminal connection device - Google Patents

Abstract

PURPOSE:To certainly connect a signal terminal to a tester by small pressing force by providing the terminal coming into contact with the lower part of the conductive liquid received in the hole bored in an insulator to pierce through the insulator. CONSTITUTION:Holes 41 not piercing through an insulator 40 are provided to the insulator 40 at the respective positions corresponding to the signal terminals 20 of a printed wiring board 10 and a conductive liquid 42 is injected in the holes 41 and a terminal 43 coming into contact with the lower part of the conductive liquid 42 at one end thereof and piercing through the insulator 40 at the other end thereof is provided to each of the holes 41. Further, the holes 41 are covered with plastic covers 44 for preventing the scattering of the liquid 42 when the terminals 20 are inserted in the holes 41. The terminals 20 are inserted in the holes 41 of a connection apparatus 40A (insulator 40) and output is taken out of the terminals 43 to be connected to a tester 30 by a cable 30A. At this time, since the terminals 20, 43 are connected through the liquid 42, they can be stably connected by small pressing force.

Description

[Detailed Description of the Invention] (Summary) Regarding a connection method for connecting a plurality of signal terminals of a printed wiring board to a testing machine, we have developed a signal terminal connection method that can reliably connect signal terminals of a printed wiring board with a small pressing force. A non-penetrating hole is drilled in the insulator at a position corresponding to the signal terminal, a conductive liquid is placed in the hole, one end contacts the bottom of the conductive liquid, and the other end penetrates the insulator. Terminals are provided, and the signal terminals of the printed wiring board are immersed in a conductive liquid to connect the signal terminals to the terminals via the conductive liquid.

[Industrial application field]

The present invention relates to a connection method for connecting a plurality of signal terminals of a printed wiring board to a testing machine.

With the progress of semiconductor technology and the technology of printed wiring boards on which they are mounted, the functions of circuits mounted on a single printed wiring board are becoming more complex and sophisticated.

Therefore, the number of signal terminals for interfacing the printed wiring board with the outside has also increased, and a large number of signal terminals are being provided at small pitches.

The pitch of the signal terminals is generally 2.54 mm and 1.27 mm.

There is a need for a signal terminal connection method that can reliably connect such signal terminals to a testing machine with a small pressing force.

[Conventional technology]

FIG. 4 shows a diagram illustrating a conventional example.

FIG. 4(a) is a diagram showing the connection state, in which lO in the figure is a printed wiring board having a signal terminal 20, 4o is an insulator, 47
is a connection terminal. FIG. 4(b) is a diagram showing the structure of the connecting terminal 47. The connecting terminal 47 is a terminal 47A, a terminal 4
It is divided into two parts, 7B, and has a built-in spring 47C in the middle.

Further, the upper part of the terminal 47A has a conical hole and is plated with gold to ensure the connection with the signal terminal 2o.

The connection terminal 47B is connected to the tester 30, which is not shown.

[Problem to be solved by the invention]

In the conventional example described above, the signal terminal 20 and the connection terminal 47
In order to ensure reliable connection, the contact force per connection terminal is set at 50 to 200 gr.

For example, when 50 128-bin connectors are mounted in three stages, the total number of pins N is N=128x50x3 =19200 (pins).

Here, even if the contact force per piece is 100 gr, which is approximately in the middle of 50 to 200 gr, the total contact force F is F = 19200 x 100 = 1920 x 10'' (gr) = 1.92 ().

In order to ensure the contact force per bottle, it is necessary to press the wiring board with such a large force, and generating such a large pressing force makes the device large-scale and reduces operability. I don't like the top either.

An object of the present invention is to provide a signal terminal connection method that can reliably connect signal terminals of a printed wiring board with a small pressing force.

[Means to solve the problem]

FIG. 1 shows a detailed illustration of the invention.

In the principle diagram of the present invention shown in FIG. 1, 10 is a printed wiring board of a test object, and 20 is a signal terminal for inputting and outputting signals to the printed wiring board.

Further, 40 is an insulator, 41 is a hole that does not penetrate through the insulator 40 at a position corresponding to the signal terminal 20, 42 is a conductive liquid, and 43 is a hole below the conductive liquid 42. It is a terminal that contacts and penetrates the insulator 40, and connects the signal terminal 20 and the terminal 43 of the printed wiring board 10.
This is a means for solving this problem by using the conductive liquid 42.

[For production]

A conductive liquid 42 is placed in a hole 41 made in an insulator 40.

A terminal 43 that contacts the lower part of the conductive liquid 42 and penetrates the insulator 40 is provided below the insulator 40. When connecting the signal terminal 20 of the wiring board 10, the signal terminal 20 is inserted into the hole 41. It is immersed in conductive liquid 42 in .

The pressing force at this time only needs to be equal to or greater than the weight of the conductive liquid 42 removed by the signal terminal 20, and it is possible to reliably connect with a small pressing force.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 and 3.

FIG. 2 is a diagram for explaining the present invention in detail, and FIG. 3 is a diagram for explaining the connection of an embodiment of the present invention to a testing machine.

Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 2(a) is a diagram illustrating the connection of the signal terminal 20, in which 20 is a signal terminal of the printed wiring board 10 (not shown), 40 is an insulator, 41 is a hole, 42 is a conductive liquid, 43 is a terminal, 44 is a cover, 45 is a holding fitting, and 46 is a screw.

In this embodiment, a cover 4 is provided to prevent the conductive liquid 42 from scattering when the signal terminal 20 is inserted into the conductive liquid 42.
4.

FIG. 2(b) is a diagram showing a state in which, for example, the cover 44 is made of plastic, held down with a holding fitting 45, and fixed with screws 46.

Further, the cover 44 is provided with a groove so that the signal terminal 20 can be easily inserted therein.

The shape of the cover and the shape of the retainer shown in FIG. 2 are just examples, and the effects of the present invention will not change even if other shapes are used.

FIG. 3 shows a connecting device 40 for connecting the signal terminals 20 of the printed wiring board 10.
3 is a diagram illustrating a state in which the signal terminal 20 of the printed wiring board 10 is connected to the testing machine 30 via the connecting device 40.
It is inserted into the hole 41 of A, the output is taken out from the terminal 43 (not shown), and it is connected to the testing machine 30 via the cable 30A.

Here, since each signal terminal 20 and the terminal 43 of the connection device 4OA are connected via the conductive liquid 42, stable connection can be achieved with a small pressing force.

〔Effect of the invention〕

According to the present invention as described above, there is provided a signal terminal connection method that enables stable connection with a small pressing force by connecting the signal terminals of a printed wiring board and a testing machine via a conductive liquid. can be provided.

[Brief explanation of the drawing]

Figure 1 is a diagram explaining the present invention in detail, Figure 2 is a diagram explaining the invention in detail, Figure 3 is a diagram explaining the connection of the embodiment of the present invention to a test machine, and Figure 4 is a diagram explaining the connection of the embodiment of the present invention to a test machine. Figures illustrating a conventional example are shown, respectively. In the figure, 10 is a printed wiring board, 20 is a signal terminal, 30 is a tester, 30A is a cable, 40A is a connecting device, 40 is an insulator, 41 is a hole, 42 is a conductive liquid, 43. 47A, 47B are terminals , 44 is a cover, 45 is a holding fitting, 46 is a screw, 47 is a connecting terminal, and 47C is a spring.

Claims (2)

[Claims] (1) A connection method for connecting a plurality of signal terminals (20) of a printed wiring board (10) to a testing machine (30), comprising an insulator (
A non-penetrating hole (41) is made at a position corresponding to the signal terminal (20) of the hole (40), and a conductive liquid (
42), one end is in contact with the lower part of the conductive liquid (42), and the other end is a terminal (4) that penetrates the insulator (40).
3), and the signal terminal (10) of the printed wiring board (10) is provided.
20) in the conductive liquid (42) to connect the signal terminal (20) and the terminal (43) via the conductive liquid (42). . (2) A non-penetrating hole (41) is made in the insulator (40) at a position corresponding to the signal terminal (20), and the hole (41)
), a conductive liquid (42) is placed in the conductive liquid (42), and a terminal (43) is provided, one end of which contacts the lower part of the conductive liquid (42), and the other end of which penetrates the insulator (40). Signal terminal connection device. (3) The signal terminal connection device according to claim (2), further comprising a cover (44) provided above the hole (41) to prevent the conductive liquid (42) from scattering.