JPH10134873A - Contact terminal and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact terminal in which manufacturing is easy, and contact with a lead is excellent by providing plural protrusions of an obtuse angle cone shape at the tip of the contact terminal through a V-shaped blade shape cutter whose vertical angle is obtuse. SOLUTION: Plural V-shaped slits are cut on the surface of the head portion 63 of contact terminal raw material formed by good conduction material such as copper or the like by a cutter of a V-shaped blade shape whose vertical angle is 90 deg. to 160 deg.. Next, plural V-shaped slits orthogonal thereto are cut so as to form quadrangle pyramid protrusions 1, 1... to obtain a cotact terminal A. Thereby, the protrusions 1 can easily be provided on the contact terminal. When the contact terminal is used for the test or the inspection of a semiconductor device such as a PGA package or the like, sure contact with a lead can be obtained regardless of the surface conditions of the pin-like lead 60. No change of the contact terminal in response to the lead conditions is required so that the efficiency of the test or the inspection can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact terminal, and more particularly to a contact terminal used for a test and inspection device for a semiconductor device such as a PGA package.

[0002]

2. Description of the Related Art In general, a semiconductor package having a pin-shaped or bump-shaped lead such as a PGA package is tested and inspected by pressing the tip of the lead of the semiconductor package against a contact terminal of a testing machine and probing each lead. As contact terminals,
Conventionally, those shown in FIG. 6 are frequently used.

[0006] That is, the contact terminal A shown in FIG. 6A is formed in a cup shape with a concave central portion in order to make the contact surface with the lead 60 as large as possible.
(B) shows a needle-like portion 7 having a conical shape with a sharp tip.
Is formed at the tip.

[0004]

However, in the case of the former, a lead 60 having no solder or the like attached to the surface is used.
Is effective for
The lead 60 having solder remaining on the surface has a disadvantage that a good contact state with the lead 60 cannot be obtained due to an oxide film formed on the surface of the adhered solder or solder dust.

On the other hand, the latter is effective for the lead 60 on which the solder remains because the needle-like portion 7 breaks the oxide film of the adhered solder even if the solder adheres to the surface. As shown in FIG. 6B, the needle-shaped portion 7 breaks the gold plating film 61 formed on the surface of the lead 60 and exposes the base of the lead 60 to the lead 60 not attached to the surface. In addition, there is a disadvantage in that in the process of joining the solder to the mounting board after the inspection, poor solder wetting or poor soldering may be caused.

As a result, conventionally, the contact terminal A has to be changed according to the state of the lead 60, and has a drawback that the number of testing and inspection steps is increased. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks, and has as its object to provide a contact terminal capable of making good contact with a lead regardless of the surface state of the lead, and a method of manufacturing the same.

[0007]

According to the present invention, there is provided a contact having a plurality of protrusions 1, 1,... Having a conical shape having an obtuse angle .theta. This is achieved by providing terminals.

By arranging a plurality of projections 1 whose apex angle θ is obtuse, the penetrating force of the lead 60 to the surface film is weakened, and it is possible to break the surface oxide film of the solder. Injury can be prevented or minimized.

As a result, it is possible to use one type of contact regardless of the presence or absence of the residual solder.
Testing man-hours can be reduced. The cone shape is a cone or a pyramid, and it is not necessary that the top is on the center line of the bottom surface, but as described in claim 2, the projection 1 is a regular polygonal pyramid, and each projection 1 Side of the other protrusion 1 adjacent
When arranged so as to be flush with the side surfaces of the contact terminal material 2, it is possible to easily form a desired projection 1 simply by cutting the end face of the contact terminal material 2 vertically and horizontally with a V-shaped cutter 5. It becomes possible to reduce.

According to the third aspect of the present invention, a method for manufacturing a contact terminal A is provided. In the present invention, the contact terminal A is formed by cutting a V-shaped groove 3 parallel to the end face of the contact terminal material 2 to form a plurality of ridges 4 having a triangular cross section with an obtuse angle θ being obtuse. Is manufactured by running a V-shaped blade-type cutter 5 having an obtuse angle in a direction intersecting the ridges 4 and separating the ridges 4 by the V-shaped grooves 3.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG. 3 shows an example of a tester 8 using a contact terminal A according to the present invention. The test machine 8 includes a control unit 80 and a test printed board 81 connected to the control unit 80.
The probe printed board 82 is connected. On the probe printed circuit board 82, connectors 9 having lead insertion holes 90 formed therein corresponding to the lead pitch of the semiconductor package 6 to be evaluated are fixed.
The contact terminal A according to the present invention is disposed therein.

The illustrated example shows the inspection of a PGA (pin grid array) package. In the inspection of the PGA package, a pin-shaped lead 60 is inserted into a lead insertion hole 90 and the tip is pressed against a contact terminal A. It is performed in the state where it is made.

The contact terminal A is formed of a material having good conductivity such as copper, as shown in FIGS.
, And a plurality of projections 1, 1,... Formed at a pitch p of about 0.1 mm on the surface of the head section 63. Each projection 1 formed on the surface of the head portion 63
Means that the apex angle θ is in the range of 90 ° to 160 °, preferably 1
It has a regular quadrangular pyramid shape of 20 ° (only the case of 120 ° will be described in the present embodiment), and is formed adjacently with the edges of the bottom surface in contact with each other. In addition,
In FIGS. 1 and 2, a flat portion 64 is formed around the projection group. However, as described later, when the projection 1 is formed by cutting, as shown in FIG. It is also possible.

The above-mentioned contact terminal A can be manufactured, for example, as follows. That is,
First, a contact terminal material 2 having a head portion 63 at an end is formed of a highly conductive material such as copper. The contact terminal material 2 has a shape conforming to a component used for the contact terminal A, such as the probe printed circuit board 82, and is formed in a pin shape in the present embodiment.

Next, as shown in FIG.
A plurality of parallel V-shaped grooves 3, 3... Are cut from the surface of the surface 3 by a cutter 5 having a V-shaped blade having an apex angle θ of 120 °. By cutting the surface of the head portion 63, a plurality of ridges 4 having an obtuse angle θ are formed on the surface, and then, as shown in FIG.
(The arrow A in FIG. 4A)
), The ridges 4 are separated by the new V-shaped groove 3.

As described above, the parallel V
As shown in FIG. 5, by cutting the groove 3, the surface of the head portion 63 has an apex angle θ, that is, an angle formed by a line segment passing through the center of the pair of side walls facing the apex. A plurality of protrusions 1, 1...
If necessary, as shown in FIG. 2, the projection 1 at the periphery is cut off to form a flat portion 64, and the contact terminal A is formed.
Is completed.

In the above-described embodiment, the head section 63 is formed by the cutter 5 having the blade mold having an apex angle θ of 120 °.
Although the surface 1 is vertically and horizontally cut to form the projection 1 having a regular quadrangular pyramid shape, the vertical angle θ of the cutter 5 for cutting in the vertical direction and the cutter 5 for cutting in the horizontal direction may be different.
Further, for example, the triangular pyramid-shaped projections 1 can be formed by running the cutters 5 in three directions so as to cross each other at 60 °.

[0018]

As is apparent from the above description, according to the present invention, the contact with the lead can be ensured irrespective of the surface condition of the lead. In this case, it is not necessary to change the contact terminal each time depending on the lead state.

Further, since the projection can be formed only by moving the cutter from a plurality of directions, the manufacture is easy.

[Brief description of the drawings]

1A and 1B are diagrams showing the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a side view of FIG.

FIG. 2 is a perspective view of FIG.

FIGS. 3A and 3B are views showing a tester, wherein FIG. 3A is an overall view and FIG. 3B is an explanatory view showing a connector.

FIG. 4 is a diagram showing a manufacturing process of a contact terminal, wherein (a)
FIG. 2 is a plan view showing a state in which a plurality of V-shaped grooves are cut from one direction, FIG. 2B is a front view, and FIG. 1C is a right side view.

FIG. 5 is a view showing a modification of FIG. 1, wherein (a) is a plan view,
(B) is a sectional view taken along line BB of (a).

FIG. 6 is a diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 projection 2 contact terminal material 3 V-shaped groove 4 ridge 5 cutter A contact terminal θ apex angle

Claims (3)

[Claims] 1. A contact terminal provided with a plurality of projections having a pyramid shape with an obtuse angle at an apex at an end. 2. The projection is a regular polygonal pyramid, and the side surface of each projection is flush with the conical surface of another adjacent projection.
The described contact terminal. 3. A V-shaped groove parallel to the end face of the contact terminal material is cut to form a plurality of ridges having a triangular cross section having an obtuse angle, and then a V-shaped blade having an obtuse angle is formed. A method of manufacturing a contact terminal in which a cutter is run in a direction intersecting the ridge to separate the ridge by a V-shaped groove, and a polygonal pyramid-shaped projection having an obtuse angle formed on an end face of the contact terminal material.