WO2012005234A1

WO2012005234A1 - Member for processing with lathe, acicular member, and contact probe

Info

Publication number: WO2012005234A1
Application number: PCT/JP2011/065329
Authority: WO
Inventors: 風間　俊男; 重樹石川
Original assignee: 日本発條株式会社
Priority date: 2010-07-05
Filing date: 2011-07-05
Publication date: 2012-01-12
Also published as: TW201211546A; TWI442055B

Abstract

Provided is a member for lathe processing which, when used for forming, by lathe processing, a product configured of materials including a rare and expensive material, can inhibit such material from being wasted and attain a reduction in cost. Also provided are an acicular member and a contact probe. The member for processing with a lathe comprises: a core part which is of a rod shape and comprises copper, a copper alloy, or iron; a coating part which covers the periphery of the core part without leaving a gap therebetween and comprises a noble metal or a noble-metal alloy; and a peripheral part which covers the periphery of the coating part without leaving a gap therebetween and comprises copper, a copper alloy, or iron.

Description

Lathe processing members, needle-shaped members and contact probes

The present invention relates to a lathe machining member, a needle-like member, and a contact probe that are attached to a lathe and perform lathe machining.

Conventionally, when processing a metal or the like using a lathe, the workpiece, which is a lathe machining member, is attached and fixed to the chuck of the lathe, and then the desired shape is formed by cutting the workpiece using a tool or a drill. Forming. Specifically, for example, when an axially symmetric member such as a screw is formed by lathe processing, it is common to apply a cylindrical workpiece made of a solid solid material (see, for example, Patent Document 1). ).

JP 2003-291002 A

However, since the lathe process cuts off many parts of the workpiece, when a rare and expensive material such as a noble metal alloy is used as a material, it is wasteful and it is difficult to reduce the cost.

The present invention has been made in view of the above, and it is possible to reduce the waste of such material and reduce the cost when a product made of a rare and expensive material is formed by lathe processing. An object is to provide a lathe member, a needle-like member, and a contact probe.

In order to solve the above-described problems and achieve the object, a lathe machining member according to the present invention is a lathe machining member that performs lathe machining by being attached to a lathe and has a bar shape, copper, copper alloy or A core portion made of iron, a side surface of the core portion covered without gap, a coating portion made of noble metal or a noble metal alloy, and a side surface of the coating portion covered without gap, and an outer peripheral portion made of copper, copper alloy, or iron; , Provided.

The lathe machining member according to the present invention is characterized in that, in the above invention, the core part and the outer peripheral part are made of the same material.

Further, the needle-shaped member according to the present invention has a needle shape formed using the lathe machining member according to the above-described invention, and each one end portion of the needle-shaped longitudinal direction is an end portion of the covering portion. And having a plurality of sharp ends protruding along the longitudinal direction, the other end portion in the longitudinal direction has a rod shape with the covering portion exposed on the side surface. .

The contact probe according to the present invention includes a first plunger composed of the needle-like member described in the above invention, and one end attached to the other end, and is extendable along the longitudinal direction of the first plunger. And a conductive second plunger attached to the other end of the spring member.

In the contact probe according to the present invention, in the above invention, the spring member is wound at a predetermined pitch, and an open end is attached to one of the first and second plungers. A tightly wound portion that extends from the end of the wound portion and is tightly wound and has an open end attached to the other of the first and second plungers, and when the contact probe receives a predetermined load, The tightly wound portion can be in contact with a plunger to which the open end of the coarsely wound portion is attached.

According to the present invention, a rod-shaped core part made of copper, copper alloy or iron, the outer periphery of the side surface of the core part is covered without gaps, a covering part made of noble metal or a noble metal alloy, and a side surface of the covering part And an outer peripheral portion made of copper, copper alloy or iron, and an inexpensive metal is applied to the core portion and the outer peripheral portion. Therefore, when a product made of a rare and expensive material is formed by lathe processing, it is possible to reduce the waste of such a material and reduce the cost.

FIG. 1 is a diagram showing a configuration of a lathe machining member according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a diagram showing an outline of a lathe machining process using the lathe machining member according to the embodiment of the present invention. FIG. 4 is a diagram showing a configuration of a contact probe according to an embodiment of the present invention. FIG. 5 is a cross-sectional view showing the configuration of the needle-like member according to one embodiment of the present invention. FIG. 6 is a diagram showing a configuration of an end face of a lathe machining member according to another embodiment of the present invention.

Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the accompanying drawings. It should be noted that the drawings are schematic, and the relationship between the thickness and width of each part, the ratio of the thickness of each part, and the like may be different from the actual ones. Of course, there may be included portions having different dimensional relationships and ratios.

FIG. 1 is a diagram showing a configuration of a lathe machining member according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG. A lathe machining member 1 shown in FIGS. 1 and 2 includes a core portion 2 having a substantially columnar shape, a side surface of the core portion 2 without a gap, and a covering portion 3 having a hollow substantially cylindrical shape. The outer peripheral part 4 which covers a side surface without gap and makes a hollow substantially cylindrical shape is provided. The lathe member 1 is formed so that the diameters of the core portion 2, the covering portion 3, and the outer peripheral portion 4 have a predetermined ratio by wire drawing or drawing. In addition, what is necessary is just to set suitably the ratio of the diameter of the core part 2, the coating | coated part 3, and the outer peripheral part 4 according to the use of the product after a process.

The core part 2 and the outer peripheral part 4 are made of copper, a copper alloy, or iron. Among these, the component ratio of the copper alloy is 97.2 to 98.6% of copper (Cu), 1 to 2% of nickel (Ni), and 0.2 to 0.4 of silicon (Si) in mass percent concentration. %, Zinc (Zn) is 0.2 to 0.4%. Such a copper alloy has a tensile strength of 40 kgf / mm ² . In the present embodiment, the core portion 2 and the outer peripheral portion 4 are made of the same material, but more generally, the core portion 2 and the outer peripheral portion 4 may be made of different materials. In addition, the outer peripheral part 4 does not need to form complete hollow cylindrical shape, for example, a notch, a groove | channel, etc. may be formed in a part of side surface.

The covering portion 3 is made of a noble metal or a noble metal alloy. Examples of the noble metal include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), and rhodium (Rh). The covering 3 is more preferably made of a noble metal or a noble metal alloy having a Vickers hardness (HV) of 400 or more and an electric resistivity of 5.00 × 10 ⁻⁸ Ω · m or less.

FIG. 3 is a diagram showing an outline of lathe processing using the lathe machining member 1. When performing lathe machining, the lathe machining member 1 is attached and fixed to the lathe chuck 5 and then the bite 6 is sent from right to left in the figure while rotating the chuck 5 at a predetermined rotational speed. Thus, the lathe member 1 is cut into a desired shape. Before turning the lathe member 1 with a lathe, the lathe member 1 may be further drawn or drawn.

Next, an example of a processed product processed using the lathe member 1 will be described. FIG. 4 is a diagram showing a configuration of a main part of a contact probe having parts machined from the lathe machining member 1 and a probe holder for accommodating the contact probe. A contact probe 11 shown in the figure is a jig for conducting electrical connection between a semiconductor integrated circuit and a signal processing circuit that transmits a test signal when conducting a continuity test of the semiconductor integrated circuit such as an IC chip. The contact probe 11 connects the first plunger 12 and the second plunger 13 having tip portions protruding in directions opposite to each other, and the first plunger 12 and the second plunger 13, and is in the longitudinal direction (vertical direction in FIG. 4). And a spring member 14 that is telescopic. Among these, the first plunger 12 is a needle-like member formed from the lathe machining member 1.

The first plunger 12 protrudes along the longitudinal direction and has a crown-shaped tip portion 12a provided with a plurality of sharpened ends having the same shape, and a flange portion having a diameter larger than the maximum diameter of the tip portion 12a 12b, a boss portion 12c that protrudes in the opposite direction to the tip portion 12a with respect to the flange portion 12b, has a cylindrical shape with a diameter smaller than the diameter of the flange portion 12b, and into which the end portion of the spring member 14 is press-fitted, and a boss portion It has a cylindrical shape with a diameter smaller than the diameter of 12c, has a base end portion 12d extending from the boss portion 12c to the opposite side of the flange portion 12b, and has a symmetrical shape with respect to the central axis in the longitudinal direction.

FIG. 5 is a longitudinal sectional view showing the configuration of the first plunger 12. The sharp end 121a of the front end portion 12a is obtained by sharpening the end portion of the covering portion 3 by grooving during lathe processing. Further, the outer peripheral surface of the base end portion 12d is obtained by exposing the covering portion 3.

The second plunger 13 protrudes in a direction opposite to the distal end portion 13a via the flange portion 13b, a distal end portion 13a having a sharp end, a flange portion 13b having a diameter larger than the maximum diameter of the distal end portion 13a, and the flange portion 13b. A boss portion 13c into which the end of the spring member 14 is press-fitted, a cylinder shape with a diameter smaller than the diameter of the boss portion 13c, and from the boss portion 13c to the flange portion 13b. It has a base end portion 13d extending on the opposite side, and has a symmetrical shape with respect to a central axis parallel to the longitudinal direction. The second plunger 13 is formed using copper, a copper alloy, or iron.

A second lathe machining member having a core portion made of a noble metal or a noble metal alloy and a covering portion made of copper, copper alloy or iron and covering the side surface of the core portion without gaps is processed. A plunger may be formed. In this case, the sharp end portion of the tip portion of the second plunger is made of a noble metal or a noble metal alloy.

Further, as the second plunger, a needle-like member having the same configuration as that of the first plunger 12 can be applied except that the length of the base end portion is different.

The spring member 14 is a coil spring made of a conductive material having a uniform diameter and capable of expanding and contracting in the axial direction. More specifically, the spring member 14 has a coarsely wound portion 14a wound at a predetermined pitch that is not zero, and a tightly wound portion 14b that is tightly wound from the end of the coarsely wound portion 14a. The opening end portion of the rough winding portion 14a is attached to the boss portion 12c of the first plunger 12 by press-fitting. On the other hand, the open end of the tightly wound portion 14b is attached to the boss portion 13c of the second plunger 13 by press fitting.

Note that the positions of the coarsely wound portion and the tightly wound portion of the spring member may be reversed. That is, the side attached to the first plunger may be a tightly wound portion, while the side attached to the second plunger may be a coarsely wound portion. In this case, the length of the base end portion of the second plunger is made longer than the length of the base end portion of the first plunger so that the base end portion of the second plunger is in close contact when the contact probe 11 receives a load. What is necessary is just to make it contact with a winding part.

The contact probe 11 having the above configuration is accommodated in the probe holder 21. The contact probe 11 accommodated in the probe holder 21 electrically connects the semiconductor integrated circuit 100 to be inspected and the circuit board 200 that outputs a signal for inspection, and transmits and receives signals. When inspecting the semiconductor integrated circuit 100, the first plunger 12 contacts the connection electrode 101 provided on the semiconductor integrated circuit 100, while the second plunger 13 contacts the connection electrode 201 provided on the circuit board 200.

Next, the configuration of the probe holder 21 that accommodates the contact probe 11 will be described. The probe holder 21 accommodates a plurality of contact probes 11 in a pattern corresponding to the arrangement pattern of the connection electrodes 101 with both ends of each contact probe 11 exposed. The probe holder 21 is formed by laminating a first holder member 22 and a second holder member 23 each formed in a flat plate shape using an insulating material such as a synthetic resin material having a high insulating property in the thickness direction. The first holder member 22 and the second holder member 23 are fixed by screwing or bonding.

The first holder member 22 is provided with a plurality of insertion holes 221 that are penetrated in the plate thickness direction and through which the contact probe 11 is inserted. The insertion hole 221 has a stepped hole shape including a small diameter part 221a and a large diameter part 221b. The small diameter portion 221 a has an opening on the side facing the semiconductor integrated circuit 100 (the upper surface side in FIG. 4), while the large diameter portion 221 b has an opening on the side facing the second holder member 23. The first plunger 12 is prevented from coming off from the first holder member 22 by the flange portion 12b coming into contact with the step surface forming the boundary between the small diameter portion 221a and the large diameter portion 221b.

The second holder member 23 is provided with a plurality of insertion holes 231 penetrating in the plate thickness direction and through which the contact probe 11 is inserted. The insertion hole 231 communicates with any of the plurality of insertion holes 231. The insertion hole 231 has a stepped hole shape including a small diameter portion 231a and a large diameter portion 231b. The small diameter portion 231 a has an opening on the side facing the circuit board 200 (the lower surface side in FIG. 4), while the large diameter portion 231 b has an opening on the side facing the first holder member 22. The second plunger 13 is prevented from coming off from the second holder member 23 by the flange portion 13b coming into contact with the step surface forming the boundary between the small diameter portion 231a and the large diameter portion 231b.

As the insulating material constituting the first holder member 22 and the second holder member 23, a synthetic resin material having good insulating properties can be used. In addition, as the insulating material, a resin material having good slidability, a machinable ceramic, Teflon (registered trademark), or the like can be used.

The insertion holes 221 and 231 were either drilled, etched or stamped into the insulating material forming the base material, or used any one of laser, electron beam, ion beam, wire discharge, etc. It is formed by processing.

In addition, the ratio of the plate thickness of the first holder member 22 and the plate thickness of the second holder member 23 can be appropriately set according to the shape of the contact probe 11 to be accommodated.

When the semiconductor integrated circuit 100 is inspected, the contact probe 11 contacts the semiconductor integrated circuit 100 and receives a predetermined load. By receiving this load, the spring member 14 contracts and curves. As a result, at least a part of the tightly wound portion 14 b comes into contact with the proximal end portion 12 d of the first plunger 12. As a result, electrical conduction through the first plunger 12, the spring member 14, and the second plunger 13 in sequence is realized by the shortest path. In this way, by realizing electrical conduction through the shortest path, an increase in inductance of the contact probe 11 at the time of inspection can be suppressed.

According to the embodiment of the present invention described above, a rod-shaped core part made of copper, a copper alloy or iron, and a side part of the core part are covered without a gap, and a covering part made of a noble metal or a noble metal alloy, And the outer peripheral portion made of copper, a copper alloy or iron, and a metal cheaper than a noble metal or a noble metal alloy is applied to the core portion and the outer peripheral portion. Therefore, the amount of noble metal or noble metal alloy used can be greatly reduced, and when a product made of a rare and expensive material is formed by lathe processing, the waste of such a material can be reduced and the cost can be reduced. .

Further, according to the present embodiment, the noble metal or the noble metal alloy is applied to the base end portion that slides along the winding direction on the distal end of the needle-like member provided in the contact probe and the inner circumference of the tightly wound portion of the spring member. Therefore, oxidation and wear of the contact portion are less likely to occur, and the electric resistance is stabilized. Therefore, even if the work of scraping off the solder adhered to the tip by repeating the inspection using a sandpaper etc. is periodically performed, it can be used for a long period of time, and the needle-like member and contact probe excellent in durability Can be provided.

So far, the best mode for carrying out the present invention has been described in detail, but the present invention should not be limited only by the above-described embodiment. For example, a metal or an alloy that improves adhesion may be interposed in one or both of the core portion 2 and the covering portion 3 and the covering portion 3 and the outer peripheral portion 4. Examples of such a material include nickel or a nickel alloy.

Further, the core part only needs to have a rod shape, and may have a shape other than a cylindrical shape. FIG. 6 is a diagram illustrating a configuration of an end face of a lathe member when the core portion has a quadrangular prism shape. The lathe machining member 31 shown in the figure includes a core portion 32 having a quadrangular prism shape, a covering portion 33 that covers the side surface of the core portion 32 without a gap, and an outer peripheral portion 34 that covers the side surface of the covering portion 33 without a gap. Prepare. The core portion 32 is made of the same material as the core portion 2. The covering portion 33 and the outer peripheral portion 34 are made of the same material as the covering portion 3 and the outer peripheral portion 4, respectively. More generally, the core portion may have a polygonal column shape. Thus, the rigidity of a core part can be improved by making a core part into a prismatic shape.

Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

DESCRIPTION OF

SYMBOLS

1, 31

Lathe processing member

2, 32

Core part

3, 33

Cover part

4, 34 Outer peripheral part 5 Chuck 6 Bit 11 Contact probe 12

1st plunger

12a,

13a Tip part

12b,

13b Flange part

12c,

13c Boss part

12d, 13d Base end portion 13 Second plunger 14 Spring member 14a Coarse winding portion 14b Adhering winding portion 21 Probe holder 22 First holder member 23 Second holder member 100 Semiconductor integrated

circuit

101, 201 Connecting electrode 121a Sharp end 200

Circuit board

221, 231

Insertion hole

221a, 231a

Small diameter part

221b, 231b Large diameter part

Claims

A lathe machining member that performs lathe machining by attaching to a lathe,
A rod-shaped core made of copper, copper alloy or iron;
Covering the side surface of the core portion without gaps, and a covering portion made of a noble metal or a noble metal alloy;
Covering the side surface of the covering portion without a gap, and an outer peripheral portion made of copper, copper alloy or iron,
A lathe machining member characterized by comprising:
2. The lathe member according to claim 1, wherein the core portion and the outer peripheral portion are made of the same material.
A needle shape formed using the lathe machining member according to claim 1 or 2,
One end of the needle-like longitudinal direction is formed by sharpening the end of the covering portion, and has a plurality of sharpened ends protruding along the longitudinal direction,
The needle-like member, wherein the other end portion in the longitudinal direction has a rod shape with the covering portion exposed on a side surface.
A first plunger comprising the needle-like member according to claim 3;
One end portion is attached to the other end portion, and a conductive spring member that can expand and contract along the longitudinal direction of the first plunger;
A conductive second plunger attached to the other end of the spring member;
A contact probe comprising:
The spring member is
A rough winding portion wound at a predetermined pitch and having an open end attached to one of the first and second plungers;
A tightly wound portion that extends from the end of the coarsely wound portion and is tightly wound; and an open end is attached to the other of the first and second plungers;
Have
5. The contact probe according to claim 4, wherein when the contact probe receives a predetermined load, the tightly wound portion can come into contact with a plunger to which an open end of the coarsely wound portion is attached.