JP2002008810A - Electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector capable of suppressing and preventing worsening of a crosstalk characteristic and suppressing a connection load to a low value. SOLUTION: In this electrical connector, a plurality of connection pieces 4 are supported on an insulating hold plate 1, and a plurality of slit holes 2 are drilled and formed by arranging them at a predetermined interval on the hold plate 1. Moreover, each connection piece 4 consists of an insulating elastic body 5 formed to have a substantially half oval cross section and supported by passing through each slit hole 2 and a plurality of groups 6 of metallic thin wires arranged at a predetermined interval in the longitudinal direction of the elastic body 5, wound on substantially curved surface of the elastic body 5, and having a U-shape. Both of up and down end parts of the elastic body 5 protrude from both of a surface and a rear surface of the hold plate 1, respectively, and both of up and down end parts of each group 6 of metallic thin wires are exposed from both of the surface and rear surface of the hold plate 1, respectively. Since a plurality of groups 6 of metallic thin wires are arranged in parallel and are wound to correspond to a plurality of electrodes 31, 21 of a semiconductor package 30 and a circuit printed wiring board 20 for inspection, an unnecessary metallic thin wire 7 does not exist between the semiconductor package 30 and the circuit printed wiring board 20 for inspection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector for electrically connecting a semiconductor package, such as a surface mount package, to various circuit boards.

[0002]

2. Description of the Related Art In recent years, a surface mount type semiconductor package has been developed.
(E.g., BGA) have emerged and are spreading rapidly,
Along with this, electrical connectors are also being actively developed and commercialized. This electrical connector is classified into a type using a butting plate spring, a type using a sandwiching leaf spring, a type using a spring probe, a type using a circuit sheet, and the like. The circuit board is electrically connected.

In a conventional electric connector, as shown in FIG. 14, a plurality of connectors 4 are arranged on a holding plate 1 so as to be penetrated and supported. The holding plate 1 is formed with a plurality of slit holes 2 having a substantially oval shape in a plane and arranged in parallel at intervals. Each connector 4
Is an insulating elastic body 5 supported through each slit hole 2.
And a large number of fine metal wires 7 arranged side by side in the longitudinal direction of the elastic body 5 and wound around the surface of the elastic body 5. It is protruding. Each connector 4 is interposed between a semiconductor package (not shown) and a test circuit board or a practical circuit board, and is compressed in a direction in which they approach each other.
Compressively deforms, and electrically connects the semiconductor package to a test circuit board or a practical circuit board.

[0004]

The conventional electrical connector is constructed as described above, and has a structure in which a large number of fine metal wires 7 are simply wound side by side in the longitudinal direction of the elastic body 5.
A large number of unnecessary thin metal wires 7 that do not contribute to the electrical connection exist between the semiconductor package and the inspection circuit board or the practical circuit board. As a result, the crosstalk characteristics deteriorate and the connection load increases. There is a problem.
Further, if the pitch of the thin metal wires 7 is reduced and the number of the thin metal wires 7 is increased to reduce the resistance, the connection load increases.

The present invention has been made in view of the above, and an object of the present invention is to provide an electrical connector capable of preventing deterioration of crosstalk characteristics and suppressing a connection load.

[0006]

According to the first aspect of the present invention, in order to achieve the above object, a plurality of connectors are supported on a holding plate, and a plurality of slit holes are formed on the holding plate. The connectors are arranged at predetermined intervals in the longitudinal direction of an insulating elastic body supported through the slit hole and at least a part of the surface of the elastic body. And at least both ends of the elastic body project from the front and back surfaces of the holding plate, and at least both end portions of each conductive wire group from the front and back surfaces of the holding plate. The feature is that each is exposed.

A plurality of concave portions are provided on one of the inner peripheral surface of the slit hole and the connector, and a plurality of convex portions are provided on the other, and the plurality of concave portions and the convex portions are fitted to each other. Preferably, the connector is supported by a holding plate. Further, it is preferable that the elastic body of each connector is formed in a substantially semi-oval cross section or a substantially oval cross section, or it is preferably formed in a substantially circular cross section and a part of the elastic body is cut and removed in a substantially fan-shaped cross section.

Here, the holding plate in the claims may be a flat rectangular shape or a square shape. This holding plate may be a single layer or a multilayer. The electrical connector is mainly for electrically connecting a semiconductor package such as a BGA or an LGA to an inspection circuit board, a practical circuit board, or the like, but is not limited thereto. For example, a circuit board for high-frequency and high-speed signal processing may be used instead of the semiconductor package. In addition, various electric joints suitable for connection with electric connectors, specifically, electric joints used in workstations, servers, and the like are included.

According to the present invention, an electric connector is attached to a first electric joint composed of various circuit boards and the like, and a plurality of electrodes of the first electric joint and a plurality of conductive wire groups of the electric connector corresponding to the plurality of electrodes. To make the plurality of conductive wires of the electrical connector face the plurality of electrodes of the second electrical joint made of a corresponding semiconductor package or the like, and bring the first and second electrical joints closer to each other. For example, each connector provided with the conductive wire group on the surface is deformed and conductive, and the first and second electrical joints are electrically connected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 4 are penetrated and supported, and each connector 4 is composed of an insulating elastic body 5 and a plurality of thin metal wire groups 6.

The holding plate 1 is formed into a single-layer, thin (for example, 0.4 mm thick) cross-sectional plate shape using a predetermined material having an insulating property, and a plurality of slit holes 2 are arranged and formed through. In addition, a pair of positioning holes 3 are formed at both sides through a predetermined interval (see FIGS. 1 and 4). As a material of the holding plate 1, for example, polyether ether ketone (PE
EK), polyamide imide (PAI), aromatic polyester (liquid crystal polymer / LCP), polyether imide (PE
I), polyether sultone (PES), polyphenylene sulfide (PPS), and a sheet-shaped highly durable engineering plastic. As described above, the material of the holding plate 1 is appropriately selected from the above-mentioned materials, and in consideration of workability, environmental characteristics, heat resistance, electric characteristics, flame retardancy, and the like, polyetherimide is optimal.

The material of the holding plate 1 is not limited to a highly durable engineering plastic. For example, an insulating composite made of metal and resin,
Insulating metal alone (for example, alumite-treated aluminum or the like) can also be used. If these materials are used, it is possible to obtain the holding plate 1 having excellent strength, rigidity and heat resistance.

The thickness of the holding plate 1 is 20 times the height of the connector 4.
The range is set to about 50%. In addition, the plurality of slit holes 2 are arranged in a line apart from each other as shown in FIG. 1 and FIG. 4 and are drilled in the thickness direction of the holding plate 1. Each slit hole 2 has a predetermined size (for example, a width of 0.7 mm).
It is perforated in a substantially oval shape on a plane.

As shown in FIGS. 5 and 6, the plurality of connectors 4 penetrate through the slit holes 2 of the holding plate 1 and have both upper and lower ends projecting from both front and back surfaces of the holding plate 1, here upper and lower surfaces. , Independently supported apart from each other. Each connector 4
The upper and lower ends protrude from the holding plate 1 by a projection amount of about 20 to 60% of the height of the connector 4. Both ends of each connector 4 may project from the holding plate 1 by the same amount, or may project by different amounts.

As shown in FIGS. 6 to 8, each connector 4 is fitted in a slit hole 2 of the holding plate 1 so that both upper and lower ends project from the front and back surfaces of the holding plate 1. And a plurality of elastic bodies 5 which are wound in a U-shape at predetermined intervals on a curved surface of the elastic bodies 5, in other words, on a non-linear upright surface (non-back surface), and are directed in the vertical direction. And the substantially flat upper and lower ends of each of the thin metal wire groups 6 are joined to the substantially flat end faces of the elastic body 5, that is, the contact surfaces, and are respectively exposed to function as contact portions. . The elastic body 5 is formed by using a predetermined material into a line or a string which is slightly wider than the slit hole 2 and can be elastically deformed, and has a Shore A hardness after curing of 10 to 80.
° H, preferably in the range of 20 to 50 ° H.

The material of the elastic body 5 is a material having such hardness.
It is selected from the foam or a composite thereof, but in consideration of high-frequency transmission characteristics, the selection of silicone rubber having a small dielectric constant is optimal. Specifically, KE
-951 (manufactured by Shin-Etsu Chemical Co., Ltd.) is preferred.

The plurality of thin metal wire groups 6 are formed by arranging about 2 to 10 thin metal wires 7 in a horizontal line at a predetermined pitch, and a semiconductor package (shown as LGA in FIGS. 2 and 3) 30 and an inspection. Electrodes 31 and 21 of circuit board 20 for use
Are arranged intermittently so as to correspond to
Is formed to a diameter of 10 to 100 μm. The ratio of the pitch interval between the arranged portions of the plurality of thin metal wire groups 6 is 1 /
It is set to about 5１ ／. Specifically, the electrodes 31
When the pitch of 21 is 1 mm, the width of the occupied portion of the thin metal wire group 6 is preferably in the range of 0.20 mm to 0.75 mm.

Each metal wire 7 has a small volume resistivity,
It is formed by cutting a predetermined length using a material having high spring properties without being corroded by the elastic body 5. Specifically, a metal wire plated with Cu, Au, Ni, Al, brass, or gold is used as the thin metal wire 7. Preferably,
Beryllium copper, phosphor bronze plated metal thin wire 7, Cu
A thin metal wire 7 named YCut (registered trademark of Yamaha Motor Co., Ltd.) containing Ti or Ti as a chemical component is used.

Next, a method of manufacturing the electrical connector will be described. First, a sheet 8 for covering the unvulcanized elastic body 5 is prepared.
(See FIG. 9A), a plurality of thin metal wire groups 6 are arranged at predetermined intervals on the surface of the sheet 8 and temporarily fixed (see FIG. 9B).
I do. After the plurality of thin metal wire groups 6 are arranged in this manner, the sheet 8 is set on a U-shaped mold 9 and the plurality of thin metal wire groups 6 are set.
Outside (see FIG. 9 (c)), vulcanize the sheet 8,
The sheet 8 and the plurality of thin metal wire groups 6 are firmly bonded. Then, this is adhered to the surface of the elastic body 5 which has been formed in advance, and the connector 4 is formed with the plurality of thin metal wire groups 6 positioned outside (see FIG. 9D). Each of the connectors 4 is fitted into and fixed to one of the plurality of slit holes 2, and
If the upper and lower ends of each connector 4 are made to protrude from both the front and back surfaces of the holding plate 1, an electrical connector can be manufactured.

After the manufacture of the electrical connector, as shown in FIGS. 2 and 3, the positioning pins 11 of the frame-shaped positioning holder 10 are inserted into the pair of positioning holes 3 of the holding plate 1 from the front side, respectively. The spacer 12 is fitted into the pair of positioning pins 11 penetrating the plate 1 from the back side. Thus, the electrical connector, the positioning holder 10, the spacer 12
After assembling, the electric connector is fitted and mounted on the surface of the test circuit board 20 via the positioning holder 10, and the plurality of electrodes 21 on the surface of the test circuit board 20 and the plurality of connectors 4 of the electric connector are positioned and connected. And positioning holder 10
A plurality of connectors 4 of the electrical connector and a plurality of electrodes 31 of the semiconductor package 30 are positioned and opposed to each other by fitting a surface-mount type semiconductor package 30 therein. And then
When the semiconductor package 30 is strongly pressed down, the connectors 4 which are conductive portions are compressed and deformed to conduct, and the semiconductor package 30 and the inspection circuit board 20 can be electrically connected for inspection. .

According to the above configuration, the semiconductor package 30
And a plurality of thin metal wire groups 6 are wound side by side so as to correspond to the plurality of electrodes 31 and 21 of the inspection circuit board 20.
Electrode 3 between semiconductor package 30 and inspection circuit board 20
Unnecessary thin metal wires 7 that do not contribute to the electrical connection do not exist between 1 and 21. Therefore, the problem that the crosstalk characteristics deteriorate and the connection load increases can be solved very effectively. Further, even if the number of the thin metal wires 7 is increased, only the electrode portion is provided, so that a significant increase in the load can be prevented.

Further, since the plurality of connectors 4 are separated from each other and function independently, there is no adverse effect from the adjacent connectors 4, and the semiconductor package 30 and the inspection circuit board 20 are kept in an extremely good state. Can be connected.
In particular, when connecting the semiconductor package 30 made of BGA in which the height of the electrode 31 is not uniform, the repulsive force is insufficient because the connector 4 does not greatly compress in conjunction with the large compression of the adjacent connector 4. Therefore, it is possible to extremely effectively prevent the connection from becoming unstable. further,
Since each of the thin metal wires 7 is U-shaped, the contact portions with the electrodes 31 and 21 can be enlarged with a simple configuration.

Next, FIG. 10 shows a second embodiment of the present invention. In this case, a convex portion 13 composed of a plurality of ribs is provided on the inner peripheral surface of one long side of each slit hole 2 in a predetermined manner. And a plurality of recesses 14 are provided between the plurality of thin metal wire groups 6 of each connector 4, and the plurality of recesses 14 and the protrusions 13 are fitted to the holding plate 1 by fitting the recesses 14 and the protrusions 13 tightly. The child 4 is supported and fixed. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted. Also in this embodiment, the same operation and effect as the above embodiment can be expected, and the connector 4 is formed by utilizing the difference in hardness between the arrangement portion of the plurality of thin metal wire groups 6 and the flexible exposed portion of the elastic body 5. Since the connector 4 is fixed, the connector 4 can be positioned with high accuracy with a simple configuration with respect to the electrodes 31 and 21, and it is possible to effectively prevent the connector 4 from shifting due to the load at the time of connection. .
Further, assemblability, workability, and the like can be significantly improved.

Next, FIGS. 11 (a), (b) and (c) show a third embodiment of the present invention. In this case, each slit hole 2 has an inner peripheral surface on one long side. , A convex portion 13 composed of a plurality of ribs
Are arranged side by side at predetermined intervals, and in the longitudinal direction of the center of the curved surface of each connector 4, a substantially plate-shaped positioning piece 15 made of an insulating resin or the like provided with a plurality of concave portions 14 is formed or bonded, The plurality of concave portions 14 and convex portions 13 are fitted closely to the concave and convex portions so that the connector 4 is supported and fixed to the holding plate 1.
The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted. It is clear that the present embodiment can expect the same operation and effect as the above embodiment.

Next, FIGS. 12 (a), 12 (b) and 12 (c) show a fourth embodiment of the present invention. A plurality of protrusions 13 composed of a plurality of ribs are arranged side by side at predetermined intervals, and a substantially plate-shaped positioning piece made of an insulating resin or the like having a plurality of recesses 14 arranged in the longitudinal direction at the center of the back surface of each connector 4. 15 are formed or adhered, and the plurality of concave portions 14 and convex portions 13 are fitted into the concave and convex tightly so that the connector 4 is supported and fixed to the holding plate 1. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted. It is clear that the present embodiment can expect the same operation and effect as the above embodiment.

FIGS. 13 (a) and 13 (b) show a fifth embodiment of the present invention. In this case, the elastic body 5 of each connector 4 is substantially oval in cross section (O). (Including a letter or an ellipse), or a circular cross section, and a part thereof is cut out and removed in a substantially fan-shaped cross section, thereby forming a substantially C-shaped cross section. in this case,
Depending on the shape of the elastic body 5, the connector 4 may be formed in a ring shape,
It is formed in a substantially C shape. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

In the present embodiment, the same operation and effect as those of the above embodiment can be expected. When the elastic body 5 of each connector 4 is formed in a substantially oval shape, the connection and the work are performed without any directivity. Clearly, it can be simplified. Furthermore, if the elastic body 5 of each connector 4 is made circular in cross section and a part of the elastic body 5 is cut out in a substantially fan-shaped cross section and removed, the stress can be concentrated at the time of contact between the connector 4 and the electrodes 31 and 21 with a simple configuration. it can.

In the above embodiment, the projection 13 is provided in each slit 2 and the recess 14 is provided in each connector 4. However, the present invention is not limited to this.
For example, a plurality of concave portions 14 are provided in each slit hole 2, and a substantial convex portion 13 is provided in each connector 4. The connector 4 may be firmly supported and fixed. In addition, a plurality of concave and convex portions are provided in each slit hole 2, and a substantial concave and convex portion is provided in each connector 4, and the plurality of concave and convex portions and the convex and concave portions are fitted to each other to connect the connector 4 to the holding plate 1. May be firmly supported and fixed. Furthermore, the connector 4 can be detachably supported on the holding plate 1 or fixed.

[0029]

As described above, according to the present invention, there is an effect that the deterioration of the crosstalk characteristic can be suppressed and the connection load can be suppressed low.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing an embodiment of an electrical connector according to the present invention.

FIG. 2 is an explanatory side sectional view showing a use state of the electric connector according to the embodiment of the present invention.

FIG. 3 is an explanatory front sectional view showing a use state of the electric connector according to the embodiment of the present invention.

FIG. 4 is a plan view showing an embodiment of the electrical connector according to the present invention.

FIG. 5 is an explanatory sectional view showing an embodiment of the electric connector according to the present invention.

FIG. 6 is an explanatory perspective view showing a connector in the embodiment of the electric connector according to the present invention.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a side view of FIG. 6;

9A and 9B are explanatory views showing a manufacturing method in the embodiment of the electrical connector according to the present invention, wherein FIG. 9A is a perspective view showing an unvulcanized sheet, and FIG. (C) is a cross-sectional view showing a state in which a sheet is set in a U-shaped mold, and (d) is a curved shape formed on the surface of an elastic body. Glue the body,
FIG. 4 is a cross-sectional view showing a state in which a plurality of thin metal wire groups are positioned outside to form connectors, and FIG. 4E is a perspective view of FIG.

FIG. 10 is a perspective view showing a second embodiment of the electrical connector according to the present invention.

FIGS. 11A and 11B are explanatory views showing a third embodiment of the electrical connector according to the present invention, wherein FIG. 11A is a perspective view, FIG.
(c) The figure is a side view.

12A and 12B are explanatory views showing a fourth embodiment of the electrical connector according to the present invention, wherein FIG. 12A is a perspective view, FIG. 12B is a front view,
(c) The figure is a side view.

13A and 13B are explanatory views showing a fifth embodiment of the electrical connector according to the present invention, wherein FIG. 13A is a side view and FIG. 13B is a side view.

FIG. 14 is a perspective view showing a conventional electrical connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holding plate 2 Slit hole 4 Connector 5 Elastic body 6 Fine metal wire group (conductive wire group) 7 Fine metal wire (conductive wire) 13 Convex part 14 Concave 20 Test circuit board 21 Electrode 30 Semiconductor package 31 Electrode

Claims (3)

[Claims] 1. An electrical connector for supporting a plurality of connectors on a holding plate, wherein a plurality of slit holes are arranged at intervals on the holding plate, and each connector is supported through the slit holes. An insulating elastic body, and a plurality of conductive wire groups arranged at predetermined intervals in a longitudinal direction of the elastic body and wound around at least a part of the surface of the elastic body; An electrical connector wherein both end portions are projected from the front and back surfaces of the holding plate, and at least both end portions of each conductive wire group are exposed from the front and back surfaces of the holding plate. 2. A plurality of concave portions are provided on one of the inner peripheral surface of the slit hole and the connector, and a plurality of convex portions are provided on the other, respectively. 2. The electrical connector according to claim 1, wherein said connector is supported by a holding plate. 3. An elastic body of each connector is formed in a substantially semi-oval cross section or a substantially oval cross section, or is formed in a substantially circular cross section, and a part thereof is cut out and removed in a substantially fan-shaped cross section. 3. The electrical connector according to 1 or 2.