JPH0283466A - Inspection jig for printed wiring board - Google Patents

Abstract

PURPOSE:To easily test a printed wiring board by forming a jig hole to a jig printed wiring board corresponding to a through-hole and arranging a conductive rubber probe to the jig hole and connecting the wiring from the jig hole to the connection terminal of the periphery of the jig printed wiring board by printed wiring. CONSTITUTION:Jig holes 2, 21, 22 are provided to a jig printed wiring board 1 at the same positions as the through-holes of a printed wiring board to be inspected and wiring is performed to the connection terminals 4 provided to the peripheral edge of the jig printed wiring board 1 from said jig holes by printed wirings 6. Conductive rubber probes 3 are inserted in the jig holes. At the time of inspection, the probes 3 are brought into contact with the through-holes of the printed wiring board to be inspected and plugs 8 are connected to the connection terminals 4 to input signals to an automatic inspection machine 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a printed wiring board testing jig, and more particularly to a printed wiring board testing jig for testing continuity of circuits on a board.

[Prior art and problems to be solved by the invention] Conventionally,
Printed wiring boards are widely used in various electronic and electrical devices. As ICs become more highly integrated and more densely packaged, the density of conductor patterns in these printed wiring boards also increases, and there is a shift from single-sided boards to double-sided boards, through-hole double-sided boards, and multilayer boards. Through-hole double-sided boards are made of copper-clad laminates made of phenol paper, epoxy paper, epoxy glass, etc., and through-holes for inserting elements such as RC, transistors, resistors, and capacitors are drilled using a high-speed drilling machine, and then photographed or screen printed. The copper foil is removed from unnecessary areas while leaving the copper foil in the necessary pattern areas according to the wiring pattern by etching or other methods. Next, ■C1 transistor, resistor,
Automatic soldering involves inserting the leads of an element such as a capacitor into the through-hole, and using a device to solder the element and the copper foil of the pattern all at once, and then cutting off the excess leads to complete the printed circuit board. Complete.

Before the above-mentioned printed circuit board is assembled into electronic equipment and shipped, a board test is performed to check for disconnections and short circuits as a single printed circuit board, and after soldering the elements, an in-circuit test, a functional test, and a function test are performed on the equipment. After installation, the system undergoes several inspections, including system tests.

Board testing is performed by printed wiring board manufacturers to electrically inspect conductor patterns and through holes for shorts and disconnections.

As shown in FIG. 3, a probe holding plate 7 with probes 13 is prepared at positions corresponding to the through holes of the printed wiring board to be inspected, and as shown in FIG. The pad 50 is brought into pressure contact with the probe 13 provided on the probe holding plate 7, and the connection state of the conductor pattern is electrically detected. To determine the quality, the jack 11 of the probe holding plate 7 and the plug 10 are pressed together and connected to an automatic inspection machine, and the data of the non-defective board is compared with the data of the non-defective board by the automatic inspection machine that has been stored in advance. (Relationship with automatic inspection machine is not shown).

By the way, in order to create the probe holding plate 7 having the probes 13 at the positions corresponding to the printed wiring board 5 as described above, the probes are placed on the probe holding plate 7 at positions exactly corresponding to the through holes of the printed wiring board 5. A hole must be made for the probe 13 to pass through, and a conducting wire 9. ．． 91...9. , and solder the conductor 9.
At the other end, solder it to jack 11, etc.
It required a lot of effort and improvement was desired.

[Object of the Invention] The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a printed wiring board inspection jig that is easy to manufacture.

[Means for Solving the Problem] In order to achieve the above object, a printed wiring board inspection jig according to the present invention inspects a printed wiring board having a printed wiring formed between a through hole and another through hole. In the jig, a jig hole is formed on the jig printed wiring board corresponding to the above-mentioned through hole and other through holes, and a conductive rubber toucher is arranged in the jig hole. The wiring from the hole is extended around the printed wiring board of the jig by printed wiring, and is provided as a connecting terminal that can be connected to and separated from a plug connected to an inspection machine.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the printed wiring board inspection jig according to the present invention is a jig for inspecting printed wiring boards. This printed wiring board inspection jig is made as follows. Jig holes 2 are created on the jig printed wiring board 1 using the same software that automatically creates through holes using a combination machine when creating a printed wiring board, and etching and other processes are performed using a photographic method, screen printing method, etc. Using this method, leave the necessary copper foil for the wiring 6 from each jig hole 2,
Unnecessary portions of the copper foil are removed to create wiring 6 from each jig hole 2, and all terminals are extended around the printed wiring board inspection jig to form connection terminals 4. The connection terminals 4 are commercially available. It is made to fit into the plug 8 of. Jig hole 2
A conductive rubber probe 3 is provided.

For board testing, a commercially available plug 8 is pressed into contact with the connection terminal 4 as shown in FIG. 1, and the board is connected to an automatic inspection machine 12. For example, as shown in FIG. 2, short circuits in the wiring between through holes 51 and 52 of the printed wiring board 5 to be inspected
In order to check for disconnections, etc., the pads 50 of each through-hole section are pressed against a conductive rubber probe 3 provided on the printed wiring board inspection jig 1, and the connection state of the conductor pattern is electrically detected. The jig holes 21 and 22 corresponding to the through-holes of the printed wiring board to be inspected are connected to the individual connection terminals 4 by printed wiring as wiring 6, as shown in FIG.
1.42, the individual connection terminals 41 and 42 are combined into the connection terminal 4, fitted with the plug 8, and data is sent to the automatic inspection machine 12. Judgment of pass/fail is the same as before.

Since the conductive rubber probe 3 has elasticity, there is no need for a complicated structure including a plunger, barrel, spring, stopper, etc., as in conventionally used probes.

[Effects of the Invention] As is clear from the above description, the printed wiring board inspection jig of the present invention is a jig for inspecting a printed wiring board having a printed wiring formed between a through hole and another through hole. In this step, a jig hole is formed on the jig printed wiring board corresponding to the above-mentioned through hole and other through holes, and a conductive rubber contact is placed in the jig hole to connect the wiring from the jig hole. is extended around the jig's printed wiring board using printed wiring, and is provided as a connecting terminal that can be connected to and separated from the plug connected to the inspection machine, so when creating the printed wiring board inspection jig, it is difficult to place probes and conductors. No complicated work such as soldering on both ends is required,
Board tests can now be performed easily and accurately without using complex probes.

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating a printed wiring board inspection jig according to the present invention, Fig. 2 is a partial sectional view thereof, Fig. 3 is a diagram illustrating a conventional printed wiring board inspection jig, and Fig. 4 is a part thereof. FIG. 1. Jig printed wiring board 2.21.
22 , , , , , , Jig hole 3 , , , , , , ,
, Tentacle 4.41.42 , , , , , Connection terminal 5 , , ,
, , , Printed wiring board to be inspected 50 , , , , ,
, pad 51.52 , , , , through hole 6 , , ,
,,,,,Wiring (wiring between jig hole and connection terminal) 7,
, Probe holding plate 8 , Plug 9 , Conductor 10 , Plug 11 , Jack 12 , , , Automatic inspection machine 13 , , , Probe

Claims (1)

[Claims] In a jig for inspecting a printed wiring board having a printed wiring formed between a through hole and another through hole, a jig hole is formed on the jig printed wiring board corresponding to the through hole and the other through hole. At the same time,
A conductive rubber contact is placed in the jig hole, and the wiring from the jig hole is extended around the jig printed wiring board using printed wiring, and connected to and separated from the plug connected to the inspection machine. A printed wiring board inspection jig characterized in that it is provided as a possible connection terminal.