JPH05232141A - Conduction inspecting jig for printed wiring board - Google Patents

Abstract

PURPOSE:To obtain a jig, which has excellent reliability, can be manufactured at a low cost and can cope with a high-density printed wiring board, by using an intermediate plate as a laminated plate having the same thermal expansion coefficient as the wiring board, and coupling a guide hole and a probe pin by shrink fitting. CONSTITUTION:A probe pin 3 in a unitary form is held with an intermediate plate 4 on the opposite side of the electrode of a converting plate 5, which is mounted on an electrode 6 of a conductance inspecting machine. The top part of the pin 3 is connected to a printed wiring board 2 under inspection, and the opposite side is connected to the converting plate 5. A press head 1 is lowered so as to enhance the reliability of the wiring board 2, the pin 3, the converting plate 5 and the electrode 6. The stroke can be finely adjusted so that head 1 is pushed in the range of the stroke of the pin 3. The press head 1 is stopped within the range of the stroke of the pin 3. A conducting circuit is formed among the pin 3, the converting plate 5 and the electrode 6. The inspection of the printed wiring board 2 having the land, which is arranged on the grid or not arranged on the grid, can be performed with the conduction inspecting machine having the electrodes on the grid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuity inspection jig used for inspection work of printed wiring boards.

[0002]

2. Description of the Related Art With the remarkable progress of semiconductor manufacturing technology,
Electronic components tend to be downsized, and the terminal spacing tends to be small, and it has become impossible to conduct inspections by a continuity inspection machine having electrodes arranged on a grid. For this reason, a jig is interposed between the press head and the continuity tester electrode to enable the inspection.

As shown in FIGS. 2 to 4, in the conventional inspection jig, for example, in the method of FIG. 2, (2), (3) and (4) are intermediate plates made of an insulating material, and (2) ) And (3) are provided with guide holes (6) corresponding to the inspection lands of the printed wiring board to be inspected, and the intermediate plate (4) is provided with guide holes (7) at positions corresponding to the electrodes. Has been done. A springless probe pin is passed through this guide hole through the three intermediate plates to enable electrical connection with the electrode (5). In the method of FIG. 3, (2) and (3) are intermediate plates made of an insulating material, and the intermediate plate (2) has guide holes (5) at positions corresponding to the inspection lands of the inspected printed wiring board. The intermediate plate (3) is provided with guide holes (6) at positions corresponding to the electrodes (4) for the continuity tester. The relative position of the intermediate plates (2) and (3) is shifted on the lattice to buckle the probe pins (1) to enable electrical connection. FIG. 4 shows a method of using the conductive rubber (2) in which the conversion plate (3) has a land on the surface layer corresponding to the inspection land of the inspected printed wiring board and the surface layer corresponding to the electrode (4) for the continuity inspection machine. The surface layers are electrically connected to each other by a surface circuit, an insulation-coated electric wire, and through holes, and conductive rubber (2) is attached to both surfaces of the conversion plate (3).

[0004]

However, in the inspection method of FIGS. 2 and 3, since the probe pin is inclinedly attached, a contact failure is likely to occur, and the spring back of the probe pin causes the probe pin to come out of the guide hole. The data is likely to be inconsistent, and in the inspection method of FIG. 4, a high withstand voltage test cannot be performed and the manufacturing capacity of the conversion plate is required due to the rubber touching ability, and a measure for preventing static electricity charging is necessary. ..

An object of the present invention is to provide a continuity inspection jig which is excellent in reliability, can be manufactured at low cost, and can be applied to a high density printed wiring board.

[0006]

As shown in FIG. 1, a jig for continuity inspection of a printed wiring board according to the present invention includes an electrode 6 for a continuity inspection machine and a printed wiring board 2 to be inspected which are arranged on a grid. The land 21 disposed on the grid for electrically connecting the continuity inspection lands 21, 22, 23 which are disposed between the grids and are not arranged on the grid, An exchange plate 5 for exchanging the positions of the lands 22, 23 not arranged on the grid so as to be arranged on the grid, and an integrated probe pin 3 for electrically connecting the exchange plate 5 and the wiring board 2. , The land 50 where the probe pin 3 is arranged on the grid of the conversion plate 5 and the lands 51 and 5 where the probe pin 3 is not arranged on the grid.
2 and the lands 21, 22 and 23 in a jig for inspecting continuity of a printed wiring board, which comprises an intermediate plate 4 made of an electrically insulating material having a guide hole 41 for alignment for electrical connection. The intermediate plate 4 is a laminated plate having a thermal expansion coefficient equivalent to that of the wiring board 2, and is characterized in that the guide hole 41 and the probe pin are a clearance fit fit.

Further, the conversion plate 5 has a surface circuit 56 and an insulation-coated electric wire 57, which are arranged alone or in combination, and the lands 50, 51, 52 are arranged corresponding to the lands 21, 22, 23. Layer, lands 53, 5 corresponding to the electrode 6
It is also possible to use a wiring board having surface layers provided with 4, 55, 56 and holes 58, 59, 60, 61 plated with hole walls for connecting these layers.

That is, the printed wiring board continuity inspection jig of the present invention is a continuity inspection machine having a continuity inspection electrode arranged on a grid, and a land not arranged on the grid or on the grid. A conversion board for converting the positions of the lands arranged on the grid and the lands not arranged on the grid so as to be arranged on the grid for conducting the continuity test of the printed wiring board having the conversion board and the printed wiring. It is characterized in that an integrated probe pin for electrically connecting to the plate and an intermediate plate for aligning the probe pin with the land are provided.

[0009]

According to the above construction, for example, the data of the printed wiring board which is arranged on the grid or not arranged on the grid is transmitted to the conversion plate by the integrated probe pin held by the intermediate plate. The conversion board surface layer on the printed wiring board side has lands at a pair of positions with the printed wiring board, and the electrode side surface layer has lands at a pair of grid positions with the electrodes. A conduction circuit is formed by a combination of a circuit, an insulation-coated electric wire, and a through hole. Therefore, the data of the printed wiring board on the grid or not arranged on the grid can be taken out as the data on the grid and can be inspected by the continuity inspection machine arranged on the grid.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a jig according to the present invention will be described below with reference to the drawings. In the jig of this embodiment, as shown in FIG. 1, the conversion plate 5 is placed on the electrode 6 of the continuity tester. The integrated probe pin 3 is provided on the side opposite to the electrode of the conversion plate 5 and the intermediate plate 4 is provided.
Is held in. At this time, the head of the integrated probe pin is connected to the printed wiring board 2 to be inspected, and the opposite side is connected to the conversion board 5. In order to improve the connection reliability of the printed wiring board 2, the integrated probe pin 3, the conversion plate 5, and the continuity tester electrode 6, the press head 1 is lowered and pressed within the stroke range of the integrated probe pin. It is desirable to have a structure that allows fine adjustment of the stroke. Next, the operation of this embodiment will be described with reference to the drawings. The information of the printed wiring board 2 having lands on the grid or not arranged on the grid is determined by stopping the press head 1 within the stroke range of the integrated probe pin, and the integrated probe pin 3, the conversion plate 5, and the continuity test. A continuity circuit is formed between the machine electrodes 6, and a continuity inspection machine having electrodes on the grid enables inspection of a printed wiring board having lands on the grid or not arranged on the grid. The integral probe pin has a structure in which the fit is a loose fit so that the probe pin can be inserted and removed, and can be shared with other jigs.

[0011]

As described above, according to the present invention, the printed wiring having the land or the land not arranged on the grid is provided by the inspection machine having the electrodes for the continuity tester arranged on the grid. Board inspection is possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a continuity inspection jig according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a conventional inspection jig.

FIG. 3 is a sectional view of an essential part showing another conventional inspection jig.

FIG. 4 is a cross-sectional view of an essential part showing an inspection jig using another conventional conductive rubber.

[Explanation of symbols]

1. Press head 2. Inspected printed wiring board 3. Integrated probe pin 4. Intermediate plate 5. Exchange plate 6. Continuity tester electrodes 21, 22, 23. Continuity inspection land 41. Guide holes 50, 51, 52, 53, 54, 55. Land 56. Surface circuit 57. Insulated coated electric wires 58, 59, 60, 61. Plated holes

Claims (2)

[Claims] 1. An electrode (6) for a continuity inspection machine, which is arranged on a grid, and a printed wiring board (2) to be inspected,
The lands (21) arranged on the grid for electrically connecting the lands (21), (22), (23) for conductivity inspection on the grid or not arranged on the grid, An exchange plate (5) for exchanging the positions of the lands (22), (23) not arranged on the grid so as to be arranged on the grid, the exchange plate (5) and the wiring board (2). Integrated probe pin (3) for electrically connecting to each other, a land (50) where the probe pin (3) is arranged on the grid of the conversion plate (5) and a land (50) which is not arranged on the grid ( 51), (52) and the lands (21), (22), (23) from an intermediate plate (4) made of an electrically insulating material having alignment guide holes (41) for electrical connection. The intermediate plate (4) is equivalent to the wiring board (2) in the conductive inspection jig for the printed wiring board to be constructed. A laminate having a thermal expansion coefficient,
A jig for continuity inspection of a printed wiring board, characterized in that the guide hole (41) and the probe pin are a clearance fit fit. 2. The conversion plate (5) is provided with a surface circuit (56) and an insulating covered electric wire (57) alone or in combination and corresponds to the lands (21), (22) and (23). Surface layer on which the lands (50), (51) and (52) are arranged, and the lands (53), (54) and (5) corresponding to the electrodes (6).
5) and (56) are provided on the surface layer, and holes (58), (59), and (6) are formed by plating hole walls connecting these layers.
The jig for inspecting continuity of a printed wiring board according to claim 1, wherein the jig is a wiring board having 0) and (61).