JP2002062313A - Electrical inspecting jig and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical inspection jig which is highly finer than a conventional electric inspection jig and to provide its manufacturing method. SOLUTION: Two retainer plates 21a and 21b, in which through-holes 22 formed at prescribed positions are faced so as to be fixed by a fixation jig 31, and conductive wires 11 are inserted into the through-holes 22 in the respective retainer plates 21a and 21b. An insulation fixing part 41, into which an insulating resin is poured so as to be hardened, is formed between the retainer plates 21a and 21b and is cut at a cutting line 23. Then, the conductive wires 11 are fixed to prescribed positions of an insulating substrate 41a, and it is possible to obtain the electric inspection jig 100, in which exposed parts 11a of the linear conductive wires 11 are formed on one face of the insulating substrate 41a and in which the linear conductive wires 11 in prescribed lengths are formed on the other face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical inspection jig used for electrical inspection of a wiring board such as a printed wiring board and a method of manufacturing the same.

[0002]

2. Description of the Related Art Electrical inspection jigs for printed circuit boards and various semiconductor package substrates (TAB, BGA, CSP, etc.) include those using a spring probe and those using a rigid probe.

[0003] Printed circuit boards and substrates for various types of semiconductor packages have become increasingly fine, and products having a minimum pitch of 100 µm or less have appeared. However, electric inspection jigs using conventional probes have a limit of a minimum pitch between probes of one.
Since the thickness is 50 to 200 μm, the product cannot keep up with high definition of the product. Printed circuit boards and various types of semiconductor package substrates, which have been improved in definition in this way, have a problem that an electric test cannot be performed before mounting an electric element.

[0004] Further, even in the case of a printed circuit board and a substrate for various semiconductor packages within the range that can be electrically inspected by the conventional probe, if the pitch is close to the limit value of the minimum pitch between the probes, the electric inspection jig of the pattern of each product is required. There is also a problem in that it has to be manufactured individually and costs are high.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above problems, and has as its object to provide an electric inspection jig with higher definition than before and a method for manufacturing the same.

[0006]

In order to achieve the above object, the present invention firstly provides an electric inspection jig for inspecting the presence or absence of an electric failure of a wiring board,
A plurality of linear conductive materials arranged at predetermined positions are insulated by an insulating material to form an insulating base, and one surface of the insulating base has a length equal to the length of the conductive material. An exposed portion of the conductive material cut in a direction perpendicular to the direction is formed, and the other surface is an electrical inspection jig characterized in that a lead line is formed of the conductive material. Things.

According to a second aspect of the present invention, there is provided the electric device according to the first aspect, wherein a part of the conductive material formed on the other surface of the insulating base is covered with a coating material. This is an inspection jig.

According to a third aspect of the present invention, there is provided the electrical inspection according to the first or second aspect, wherein the exposed portion of the conductive material on one surface of the insulating base is plated. Jig.

According to a fourth aspect of the present invention, a plurality of linear conductive materials disposed at predetermined positions are fixed with an insulating material to form an insulating fixing portion, and the insulating fixing portion is formed. Cutting the one surface of the conductive material along a vertical surface in the longitudinal direction of the conductive material to form an exposed portion of the insulating base material and the conductive material. Things.

Further, according to the invention of claim 5, after bundling a large number of conductive materials covered with a re-meltable coating material, a part of the coating material is melted and cured to thereby fix the insulating fixing portion. After the conductive material is fixed to each other, one surface of the insulating fixing portion is cut along a vertical surface in the longitudinal direction of the conductive material, and the insulating base and the conductive material are cut off. According to another aspect of the present invention, there is provided a method of manufacturing an electrical inspection jig, wherein an exposed portion is formed.

Further, according to a sixth aspect of the present invention, there is provided a method of manufacturing an electrical inspection jig according to the fourth or fifth aspect, wherein the exposed portion of the conductive material is plated. is there.

[0012]

Embodiments of the present invention will be described below. FIG. 1B is a perspective view showing an embodiment of the electrical inspection jig of claim 1 of the present invention, and FIG. 2B is a perspective view showing an embodiment of the electrical inspection jig of claim 2. FIG. 1C is a sectional view of the electric inspection jig of FIG. 1B taken along line AA, and FIG. 2C is an electric inspection jig of FIG. 2B. Is a sectional view taken along line AA of the perspective view of FIG. FIG. 1A schematically shows a method for manufacturing the electrical inspection jig according to claim 1, and FIG. 2A schematically shows a method for manufacturing the electrical inspection jig according to claim 1 or 2.

As shown in FIGS. 1 (b) and 1 (c), the electric inspection jig 100 includes an insulating base material 4 made of an insulating material.
The exposed portion 11a of the linear conductive material 11 is formed on one surface of
Has a structure in which a linear conductive material 11 is formed on a predetermined length on the other surface. The electric inspection jig 200 is shown in FIG.
As shown in (b) and (c), an exposed portion 212a of a linear conductive material 212 is covered on one surface of an insulating base material 221 made of an insulating material with a covering material 211 on the other surface. This is a structure in which a drawn linear conductive material 212 is formed with a predetermined length.

A method for manufacturing the electric inspection jig 100 will be described. First, two holding plates 21a and 21b each having a through hole 22 formed at a predetermined position are fixed to a fixing jig 31 so as to face each other.
a and 21b are inserted into the through holes 22 and the two holding plates 21
The conductive wires 11 arranged at predetermined positions a and 21b are obtained.

Here, the arrangement pattern of the through holes 22 formed in the holding plates 21a and 21b is an arrangement in accordance with various lattice arrangements and electrode arrangement patterns of individual products. Examples of a method of forming the through hole 22 include mechanical processing with a drill or the like, laser processing, an etching process, and the like. The holding plates 21a and 21b are fixed by a fixing jig 31.
They are arranged parallel to each other and at a predetermined distance. The conductive wires 11 are passed through the through holes 22 at the same position of the holding plates 21a and 21b, one by one or one by one. The conductive wire 11 is made of a conductive material such as various types of metal wires such as copper and gold, and carbon fiber, and has an insulating coating or an oxide film as necessary. Both ends of the conductive wire 11 are held by a fixing jig (not shown) under a certain tension.

Next, an insulating resin is poured between the holding plate 21a and the holding plate 21b and hardened to form an insulating fixing portion 41 (see FIG. 1A). The insulating fixing portion 41 has a role of holding the conductive wires 11 and insulating adjacent conductive wires 11 from each other. The insulating fixing portion 41 is made of various kinds of rubber such as silicone rubber or various kinds of resin such as epoxy resin.
b, and after being subjected to defoaming treatment, is cured by heat, light or the like.

Next, the insulating fixing portion 41 shown in FIG.
Is cut along the cutting line 23, as shown in FIGS. 1B and 1C, the conductive wire 11 is placed at a predetermined position on the insulating base material 41a.
Is fixed, and an exposed portion 11a of the linear conductive material 11 is formed on one surface of the insulating base material 41a, and a linear conductive material 11 having a predetermined length is formed on the other surface. Tool 100
Is formed. If the cut surface has irregularities or chips, the cut surface is polished as necessary. The end of the conductive material 11 on the other surface of the insulating base material 41a is connected to a terminal of a tester for electrical inspection directly as a lead wire or via a connector, a terminal block or the like.

The conductive material 11 on the other surface of the insulating base 41a may come into contact with each other. In order to prevent an electrical short circuit at the time of the inspection, an insulating coating is formed on the conductive material 11 in advance, or the conductive material 11 between the insulating base material 41a and the end of the conductive material 11 is insulated. What is necessary is just to form a coating.

The arrangement pattern of the electrodes 11a of the electric inspection jig 100 is determined by the arrangement pattern of the through holes 22 formed in the holding plates 21a and 21b. If the arrangement pattern of the through-holes 22 is formed in various lattice shapes, an electric inspection jig that can be used irrespective of the pattern of the inspection object can be obtained. Also, if the arrangement pattern of the through holes 22 is matched with the pattern of the individual product, the electric inspection jig 100
Can be produced.

The minimum pitch of the electrodes 11a of the electrical inspection jig 100 is determined by the minimum pitch of the through holes 22 that can be formed in the holding plates 21a and 21b. For example, some drill blades currently in practical use have a diameter of about 50 μm, and if these are used, through holes with a pitch of about 100 μm can be formed. There is also a metal wire having a diameter of about 40 μm, which can be used as the conductive wire 11. Therefore, at present, the pitch of the electrodes 11a of the electrical inspection jig 100 is 100
It is possible to make it about μm.

A method for manufacturing the electric inspection jig 200 will be described. A large number of coated conductive wires 21 in which the linear conductive wire 212 shown in FIG.
0 is fixed by a fixing jig (not shown) to produce a coated conductive wire bundle. If necessary, fixed tension is applied to both ends of each coated conductive wire 210 by applying a certain tension. In this state, a part of the insulating coating material 211 of the coated conductive wire bundle is re-melted and hardened to produce the insulating fixing portion 220.

Here, the conductive wire 212 is made of a conductive material such as various metal wires such as copper and gold or carbon fiber. The insulating coating material 211 is re-melted
It is made of various curable rubbers or various resins.

Further, when cut along the cutting line in FIG. 2A, as shown in FIG. 2B and FIG.
1, a conductive wire 212 is fixed to a predetermined position, and an exposed portion 212a of the conductive wire 212 is provided on one surface of the insulating base material 221.
However, an electrical inspection jig 200 having a conductive wire 212 coated on the other surface with an insulating coating 211 on a predetermined length is formed.
Is formed. If the cut surface has irregularities or chips, the cut surface is polished as necessary. The conductive wire 212 covered with the insulating covering material 211 on the other surface of the insulating base material 221
Is connected to a terminal of a tester for electrical inspection directly as a lead wire or via a connector, a terminal block or the like. Here, the conductive wire 212 formed on the other surface of the insulating base material 221 is
Since they are covered with 1, they do not come into contact with each other and are electrically short-circuited.

The arrangement pattern of the electrodes 212a of the electric inspection jig 200 can be controlled by selecting the cross-sectional shape and size of the insulating covering material 211. When the insulating coating material 211 having a circular cross section as shown in FIG. 3A is used, the exposed portion 2 of the conductive wire 212
12a is a triangular lattice-shaped arrangement pattern. The distance between the adjacent exposed portions 212a is controlled by the thickness of the insulating covering material 211. When the cross-sectional shape of the insulating covering material 211 is elliptical, it is possible to form a distorted triangular lattice-like arrangement pattern.

When the insulating coating material 231 having a triangular cross section as shown in FIG. 3B is used, a hexagonal lattice-like arrangement in which an exposed portion 212a of the conductive wire 212 is provided at the hexagonal vertex. It becomes a pattern. The distance between the adjacent electrodes 212a is controlled by the thickness of the insulating covering material 231. It is also possible to form a distorted hexagonal lattice arrangement pattern by selecting the length of the sides of the triangle of the cross-sectional shape of the insulating coating material 231.

When an insulating coating 241 having a rectangular cross section as shown in FIG. 3 (c) is used, a square lattice-shaped array pattern having an exposed portion 212a of a conductive wire 212 at the apex of the square is used. Becomes Adjacent exposed part 212a
The distance between them is controlled by the thickness of the insulating covering material 241.
In addition, by selecting the length of the sides of the square of the cross-sectional shape of the insulating coating material 241, it is possible to form a distorted square lattice-like arrangement pattern.

The conductive wire 212 of the electric inspection jig 200
The minimum pitch of the exposed portion 212a is determined by the diameter of the conductive wire 212 and the thickness of the insulating covering material 211. Currently, diameter 4
A conductive wire having a thickness of about 0 μm exists, and an insulating coating having a thickness of about 20 μm can be applied. Therefore, at present, the exposed portion 212 of the conductive wire 212 of the electric inspection jig 200 is provided.
The pitch a can be reduced to about 80 μm.

FIGS. 4 (a) and 5 (a) are perspective views of an electric inspection jig in which an exposed portion of a conductive material according to the third aspect of the present invention is plated. 5 (b) is a perspective view of the electrical inspection jig of FIGS. 5 (a) and 5 (a).
The configuration sectional views taken along line -A are shown.

4 (a) and 4 (b) show an electric inspection jig in which the plating film 51 is formed on the exposed portion 11a of the conductive material 11 of the electric inspection jig 100 according to the first embodiment. It is a thing. 5a and 5b 200a
9 shows an electric inspection jig in which a plating film 231 is formed on an exposed portion 212a of a conductive wire 212 of the electric inspection jig 200 according to claim 1 or 2.

First, the exposed portion 11a of the conductive material 11 is plated by dipping the exposed portion 11a of the conductive material 11 on one surface of the insulating base material 41a of the electric inspection jig 100 in an electrolytic plating solution. The conductive material 11 on the other surface of the base material 41a
When electroplating is performed by flowing electricity from the conductive material 11
The exposed portion 11a is plated to form a plating film 51. By selecting the thickness, shape, and material of the plating film 51, various properties can be added to the tip of the electrode 11a.

In the cutting step of the electrical inspection jig 100, the exposed portion 11a of the conductive material 11 is
In this case, the tip of the exposed portion 11a of the conductive material 11 can be returned to the height of the surface of the insulating base material 41a. further,
By providing a thick plating film, a convex plating film 51 can be formed at the tip of the exposed portion 11a of the conductive material 11, and the surface of the inspection object can be easily contacted.

By appropriately selecting the material of the plating film 51 or combining a plurality of types of plating treatments,
It is possible to control mechanical strength such as electrical conductivity, hardness, and abrasion resistance at the tip of the plating film. Copper plating is desirable for improving electrical conductivity, and nickel plating is desirable for increasing hardness.

Further, it is also possible to form a thin plating film in order to control the surface condition of the tip of the plating film 51. Gold or rhodium plating is desirable for preventing the formation of a surface oxide film. This gold or rhodium plating may be electrolytic plating or electroless plating.

[0034]

According to the electric inspection jig and the method of manufacturing the same of the present invention, an insulating fixing portion of a predetermined shape is formed from a linear conductive material by an insulating material, and the insulating fixing portion is formed to a predetermined thickness. Because of the cutting process, it is possible to produce an electrical inspection jig with a high-density electrode array pattern with good reproducibility and to provide an electrical inspection jig that can handle products with higher definition than before. Has the effect of

[Brief description of the drawings]

FIG. 1 (a) is an explanatory view schematically showing a method for manufacturing an electric inspection jig according to claim 1 of the present invention. (B)
FIG. 1 is a perspective view showing a configuration of an electric inspection jig 100 according to claim 1 of the present invention. (C) is a cross-sectional view of the configuration of the electric inspection jig 100 described in (b), taken along line AA.

FIG. 2 (a) is an explanatory view schematically showing a method for manufacturing an electrical inspection jig according to claim 4 of the present invention. (B)
FIG. 3 is a perspective view showing a configuration of an electric inspection jig 200 according to claim 2 of the present invention. (C) is a cross-sectional view of the configuration of the electric inspection jig 200 described in (b), which is cut along line AA.

3 (a) to 3 (c) are cross-sectional views showing various configurations of a conductive wire covered with an insulating coating used for manufacturing the electrical inspection jig of the present invention.

FIG. 4 (a) is a perspective view of an electric inspection jig 100a in which a plating film 51 is formed on an exposed portion 11a of a conductive material 11 of the electric inspection jig 100 according to claim 1 of the present invention. Show. (B) shows the electrical inspection jig 100a described in (a).
FIG. 2 is a cross-sectional view of the configuration taken along the line AA of the perspective view of FIG.

FIG. 5 (a) is a perspective view of an electric inspection jig 200a in which a plating film 231 is formed on an exposed portion 212a of a conductive wire 212 of the electric inspection jig 200 according to claim 2 of the present invention. Show. (B) is an electric inspection jig 2 described in (a).
FIG. 2 is a configuration sectional view of a perspective view taken along line AA of the perspective view of 00a.

[Explanation of symbols]

11: conductive material 11a: exposed portion of conductive material 21a, 21b: holding plate 22: through hole 23: cutting line 31: fixing jig 41: insulating fixing portion 41a: insulating base Material 51, 231 Plating film 100, 200 ... Electric inspection jig 100a, 200a ... Electric inspection jig 210, 230, 240 with plating film formed ... Conducting conductive wire 211, 231, 241 ...... Insulating coating material 212 ... Conductive wire 212a ... Exposed portion of conductive wire 220 ... Insulating fixing portion 221 ... Insulating base material

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 2G003 AA07 AG03 AG08 AG12 AH05 2G011 AA02 AA10 AA15 AA16 AA17 AB06 AC14 AD01 AE01 AF06 2G014 AA01 AB51 AB59 AC10

Claims (6)

[Claims] An electric inspection jig for inspecting an electric failure of a wiring board, wherein a plurality of linear conductive materials arranged at predetermined positions are insulated by an insulating material. An insulating base material is formed, and one surface of the insulating base material is formed with an exposed portion of the conductive material cut at a vertical surface in a longitudinal direction of the conductive material, and the other surface is An electrical inspection jig, wherein a lead wire is formed of the conductive material. 2. The electrical inspection jig according to claim 1, wherein a part of the conductive material formed on the other surface of the insulating base is covered with a covering material. 3. The plating method according to claim 1, wherein an exposed portion of the conductive material on one surface of the insulating base is plated.
Alternatively, the electrical inspection jig according to claim 2. 4. An insulating fixing part is formed by fixing a part of a plurality of linear conductive materials arranged at predetermined positions with an insulating material, and one surface of the insulating fixing part is connected to the conductive fixing part. A method for manufacturing an electrical inspection jig, comprising cutting an insulating material and an exposed portion of the conductive material by cutting the insulating material along a vertical surface in a longitudinal direction of the conductive material. 5. After bundling a large number of conductive materials coated with a remeltable coating material, a part of the coating material is melted and cured to form an insulating fixing portion to form the conductive material. After the materials are fixed to each other, one surface of the insulating fixing portion is cut along a vertical surface in the longitudinal direction of the conductive material to form an exposed portion of the insulating base material and the conductive material. Characteristic method of manufacturing a jig for electrical inspection. 6. The method according to claim 4, wherein the exposed portion of the conductive material is plated.