JPH10312863A - Electric connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a frequency characteristic notwithstanding a cable can be easily connected to and separated from a wiring base board by electrically connecting a conductor of the cable and a wiring part of the wiring base board to each other through a conductive member. SOLUTION: In an electric connector 10, an end part of a flat cable 12 such as a coaxial flat cable is installed on a base 32, and the flat cable 12 can be connected to a wiring base board 14 by separably installing the base 32 on the wiring base board 14 by a proper fastener 58 such as a screw member so that a central conductor 18 of the flat cable 12 and a wiring part 26 of the wiring base board 14 can be connected to each other through at least a conductive member 34 of an elastic plate 30. A testing electric signal passes through at least the conductive member 34 of an elastic body between the wiring part 26 of the wiring base board 14 and the central conductor 18 of the cable 12. Leakage of the electric signal between adjacent plural conductive members 34 of the elastic plate 30 also reduces since an adjacent interval can be secured large, and a frequency characteristic is enhanced.

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 connecting a cable having a plurality of cable sections to a wiring board having a plurality of wiring sections.

[0002]

2. Description of the Related Art Generally, an energization test of a semiconductor integrated circuit is performed by:
The test is performed using a test head called a probe card, a probe board, or the like. The test head supports a plurality of probes on a wiring board in a cantilever manner. The delivery of the test electrical signal between the probe and the test apparatus is performed via a flat cable having a plurality of coaxial cable sections and a wiring section of the wiring board. The coaxial cable portion of the flat cable and the wiring portion of the wiring board are electrically connected by a connector.

As one type of this type of connector, a male connector in which a plurality of male pins are arranged on an elongated male side base at intervals in a longitudinal direction thereof, and a plurality of females having recesses for receiving the male pins. Some use a female connector in which pins are arranged on the elongated female base at intervals.

Each male pin is fixed to the male base so as to penetrate the male base in the thickness direction, and one part protruding from the male base is fitted into a recess of the female pin, and The other part protruding from the base is inserted into a through hole of the wiring board.

[0005] Each female pin is fixed to the female base at a portion where the recess is formed such that the rear portion opposite to the recess projects from the female base, and at the portion projecting from the female base. Connected to the cable section of the flat cable.

Each through hole of the wiring board is formed by a conductive tubular member that penetrates a board made of an electrically insulating material. Each cylindrical member is connected to the wiring portion of the wiring pattern formed on the wiring board, and is fixed to the other portion of the male pin with a conductive adhesive such as solder.

However, in the conventional connector, the portion forming the recess of the female pin is larger than the other portion, so that the leakage of the test electric signal between the adjacent female pins causes the portion forming the recess of the female pin. Occurs in The impedance can be easily matched between the wiring board and the male pin, but it is difficult to match between the male pin and the female pin. For these reasons, the conventional connectors have low frequency characteristics, particularly high-frequency transmission characteristics.

As another connector, there is a connector in which the male pin is directly connected to a coaxial cable portion of a flat cable without using the female connector, and is inserted into a through hole of a wiring board. However, in this connector, simply inserting the male pin into the through-hole tends to cause poor contact of the male pin with the inner surface of the through-hole. Inconvenient for separation.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the frequency characteristics despite the ease of connecting and disconnecting a cable to and from a wiring board.

[0010]

An electric connector according to the present invention comprises a base to be mounted on a wiring board, to which a cable end is mounted, an electrically insulating plate-like elastic member, and a thickness of the elastic member. And a resilient plate having a plurality of elongated conductive members penetrating in the vertical direction, and the conductor of the cable and the wiring portion of the wiring board are electrically connected via at least the conductive member.

[0011] The electric connector is assembled such that an end of a cable such as a coaxial flat cable is assembled to a base, and each central conductor of the cable and a wiring portion of the wiring board are connected via at least a conductive member of an elastic plate. The cable can be connected to the wiring board by detachably attaching the base to the wiring board with an appropriate stopper such as a screw member.

The test electric signal passes through at least an elastic conductive member between the wiring portion of the wiring board and the conductor of the cable. Leakage of an electric signal between adjacent conductive members of the elastic plate is significantly reduced as compared with a conventional connector because it is not necessary to use a female pin and the distance between adjacent conductive members can be increased.

According to the electrical connector of the present invention, the end of the cable is assembled to the base, and the base is assembled to the wiring board to connect the wiring portion and the conductor via at least the conductive member of the elastic plate. In addition, despite easy connection and disconnection of the cable to and from the wiring board, leakage of electric signals between adjacent signal lines in the connector is prevented, and the frequency characteristics are improved.

An electric power unit having a base body detachably assembled to a wiring board, and a plurality of conductive tubular portions which are electric insulating plates disposed on the base body and form through holes for receiving conductors of a cable portion. The elastic plate can be disposed between the electric insulating plate and the wiring board by using a base including the insulating plate. In this case, since the base body is made of a conductive material and is connected to the ground, it is possible to more reliably prevent the leakage of electric signals between adjacent signal lines in the connector.

[0015] The base body has a plurality of second through holes for receiving an electrical insulation layer around the conductors of the cable, and the cable can be assembled to the base body by clamps in a conductor layer around the electrical insulation layer.

The base body further has a first recess communicating with the second through hole and a second recess communicating with the first recess. Each can be located in the first and second recesses. With this configuration, the displacement of the electric insulating plate and the elastic plate with respect to the wiring board and the base body is prevented, and the electrical connection between the wiring portion of the wiring board and the conductor of the cable is favorably maintained.

Further, a plurality of first pins protruding from the wiring board into the base via the wiring section, and a plurality of second pins arranged on the base and extending on an extension of the first pins, and A second base electrically connected to the conductor, wherein the base is a first base body disposed on the wiring board, the first base body having the first pin assembled thereto; A second base body disposed on a side of the base body opposite to the wiring board, the second base body having a plurality of through holes for receiving the second pins,
The elastic body is arranged between the first and second pins, and the wiring portion of the wiring board and the conductor of the cable can be electrically connected via the first and second pins and the conductive member. The first pin is arranged on the wiring board.

In the electrical connector as described above, the first base body is arranged on the wiring board, the conductor of the cable is connected to the second pin, and the elastic body is provided between the first and second pins. By assembling the second base body to the first base body, the cable can be connected to the wiring board.

The test electrical signal passes through the first pin, the conductive member, and the second pin between the wiring portion of the wiring board and the conductor of the cable. The first and second pins need not be female pins with recesses. For this reason, despite the ease of connecting and disconnecting the cable to and from the wiring board, leakage of electric signals between adjacent signal lines in the connector is prevented, and the frequency characteristics are improved.

The first and second pins are respectively connected to the first and second pins.
And the first base body further includes a first recess in which the first holder is received, and a second recess in which the elastic body is received. A second recess communicating with the first recess through the through-hole, and the second base body may further include a receiving portion for receiving the second holder. With this configuration, the displacement of the position of the first and second pins with respect to the elastic plate, the wiring board, and the first and second base bodies is prevented, and the wiring portion of the wiring board and the conductor of the cable have good electrical connection. It is kept connected.

The first pins may be fitted into through holes formed in the wiring board and connected to the back side of the wiring board by a conductive adhesive such as solder. An electrically insulating auxiliary substrate disposed on the second base body, including an auxiliary substrate having a plurality of auxiliary wiring portions, wherein the conductor and the second pin are connected to the auxiliary wiring portion by a conductive adhesive. Good.

[0022]

1 to 3, an electric connector 10 is used as a means for connecting a cable 12 to a wiring board 14. FIG.

The cable 12 has a plurality of coaxial cable portions 16 integrally formed in parallel. Each cable part 1
6 is an electrical insulation layer 2 around the core wire or center conductor 18.
0, an outer conductor such as a mesh line, that is, a conductor layer 22 is provided around the electric insulating layer 20, and an outer sheath 24 made of an electric insulating material is provided therearound.

The wiring board 14 is a wiring board of a test head used for a conduction test of the semiconductor integrated circuit. Therefore, although not shown, a plurality of probes are supported in a cantilever shape. The wiring board 14 includes a plurality of wiring portions 26 each electrically connected to a probe on one surface of the electrically insulating board 14. The wiring part 26 is a part of a wiring pattern formed on one surface of the substrate 14 by a printed wiring technique.

The connector 10 includes an elongated elastic plate 30 and a base 32 arranged on the wiring portion 26 side of the wiring board 14. The elastic plate 30 is composed of a long and thin plate-like elastic member 3 that is electrically insulating.
6 are provided in a plurality of rows at intervals. The base 32 is
An elongated plate-shaped electric insulating plate 38 is non-displaceably disposed on a base body 40 made of a conductive material. The width and length of the elastic plate 30 are slightly larger than those of the electric insulating plate 38.

Each conductive member 34 of the elastic plate 30 penetrates the elastic member 36 in the thickness direction so as to have an angle of less than 90 degrees, preferably close to 90 degrees with respect to the elastic member 36. The surface is exposed on each surface of the elastic member 36.
The elastic member 36 is formed in an elongated plate shape by an electrically insulating elastic material such as silicone rubber or polyimide resin, preferably an elastomer. Such an elastic plate 3
0 is commercially available under the name of an interconnector, an elastomer connector or the like.

The electrically insulating plate 38 has a plurality of conductive cylindrical portions 42 forming through holes for receiving the central conductor 18 of the cable portion 16 at locations spaced apart in the longitudinal direction. Each tubular portion 42 penetrates the electric insulating plate 38 in the thickness direction, and has an outward flange 44 exposed at the lower surface of the electric insulating plate 38 at one end. 2 and 3, the flange 44 has an oval shape extending in the width direction of the electric insulating plate 38 and acting as a land portion.

The base body 40 has a plurality of through-holes 46 for receiving the electrically insulating layer 20 of the cable section 16 and a plurality of through-holes 4.
6 and a second recess 50 communicating with the first recess 48 on the side opposite to the through hole 46. The width dimension of the second recess 50 is substantially the same as that of the first recess 48, but the length dimension of the second recess 50 has a larger length dimension of the second recess 48.

The electric insulating plate 38 has a cylindrical portion 42 having a through hole 4.
6 is disposed in the first recess 48. The elastic plate 30 is fitted in the second recess 50 such that the end surface of the at least one conductive member 34 contacts the flange 44 of the tubular portion 42.

In the illustrated example, the cylindrical portion 42 and the through hole 4
6 are shown as being formed in one row, however, they may be formed in a plurality of rows depending on the number of cables 12 and cable sections 16 to be connected. In addition, each cable section 1
The center conductor 18 of FIG. 6 is bonded to the inside of the tubular portion 42 by solder 52 with the leading end inserted into the tubular portion 42, and the leading end of the central conductor 18 is attached to the tubular portion 42. , It is not necessary to solder the distal end surface to the cylindrical portion 42.

In the cable 12, the center conductor 18 is inserted through the through-hole 46 into the cylindrical portion 42 of the electric insulating plate 38 disposed in the first recess 48, and the electric insulating layer 20 is connected to the through-hole 46.
And the conductor layer 22 is assembled to the base body 40 while being pressed by the clamp 54. The clamp 54 is detachably assembled to the base body 40 by a plurality of screw members 56 screwed into the base body 40.

When the cable 12 is assembled to the connector 10 as described above, at least one conductive member 34 is connected to the elastic plate 30 by the flange 4 of the cylindrical member 42.
4 so as to be in contact with the second recess 50.

In the above-described state, the connector 10 is mounted on the wiring board 14 such that at least one conductive member 34 that contacts the flange 44 contacts any one of the wiring portions 26.
The plurality of screw members 58 are inserted into the base body 40, and the screw members 58 are screwed into the screw holes of the wiring board 14, thereby being assembled to the wiring board 14. Further, by removing the screw member 58, the connector 10 can be removed from the wiring board 14.

The test electric signal is applied between the wiring portion 26 of the wiring board 14 and the conductor 18 of the cable 12 by the elastic body 3.
0 through the conductive member 34. Leakage of electrical signals between signal lines in connector 10, such as between adjacent conductive members 34, eliminates the need for large diameter female pins and can increase the spacing between adjacent conductive members. Therefore, even if the wiring portions are arranged at a high density, the number of wiring portions is significantly reduced as compared with a conventional connector.

As a result, the leakage of electric signals between adjacent conductive members 34 is significantly reduced. Further, the impedance between each conductive member 34 and the cylindrical portion 42 and the wiring portion 26 connected thereto can be maintained at a predetermined value.

In the connector 10, each cable section 1
Since the sixth conductive layer 22 is in contact with the base body 40, the base body 40 itself is maintained at the ground potential, and external noise is prevented from entering the signal line in the connector 10. Further, since the base body 40 is connected to the plurality of wiring sections 26 by the plurality of conductive members 34, the wiring section 26 connected to the base body 40 is also maintained at the ground potential. Further, since the electric insulating plate 38 and the elastic plate 30 are arranged in the recesses 48 and 50, respectively, the displacement of the electric insulating plate 38 and the elastic plate 30 with respect to the wiring board 112 and the base body 40 is prevented, and The state of electrical connection with the central conductor 18 is favorably maintained.

Referring to FIGS. 4 to 12, in the electrical connector 60, the wiring board 62 includes a cylindrical portion 64 integrally following each wiring portion 26. Each tubular portion 64 forms a through-hole penetrating the wiring board 62 in the thickness direction.

The electrical connector 60 further includes a plurality of first
, And a plurality of second pins 68. The base 70 includes first and second base bodies 72 made of a conductive material.
And 74, and an electrically insulating auxiliary substrate 76.

Each of the first pins 66 is fitted into the cylindrical portion 64 so as to protrude from the wiring board 62 into the first base body 72 via the wiring portion 26, and is formed of a conductive material such as solder. The adhesive is bonded to the tubular portion 64 on the back side of the wiring board 62. Each of the second pins 68 is extended along an extension of the first pin 66 so that the second base body 74 is extended.
Has been assembled.

The first and second pins 66 and 68 are
Elongated first and second holders 78 and 8, respectively.
The first and second holders 78 and 80 are fixed to penetrate through the first and second holders 78 and 80. The holders 78 and 80 are manufactured by molding using an electrically insulating material.

The first base body 72 includes the first holder 7
8, a second recess 84 for receiving the elastic body 30, and a plurality of first through holes 86 for receiving the first pin 66. Recesses 82 and 84
Are open on opposite sides and are connected to each other by a first through hole 86.

The first base body 72 includes a first pin 66
Is held in the first through hole 86 by the first holder 7.
By fitting 8 into the first recess 82, it is detachably assembled to the wiring board 62. In this state,
The end face of each first pin 66 is exposed in the second recess 84.
The first base body 72 may be detachably assembled to the wiring board 62 by a plurality of screw member screws.

The second base body 74 includes the second holder 8
0, and a second pin 68
And a plurality of second through holes 90 for receiving the second through holes 90. Second
Are formed in the receiving portion 88.

After the elastic body 30 is disposed in the first recess 82, a part of the receiving portion 88 becomes the first base body 74.
The first screw member 9 is superposed on the first base 72 in a state of being received in the second recess 84 of the base body 72 of
2 is inserted into the second base body 74, and the screw members 92 are screwed into the screw holes of the first base body 72, thereby being separably assembled to the first base body 72.

The auxiliary substrate 76 has a plurality of auxiliary wiring portions 94 extending in parallel on one surface.
4 is attached to the second base body 74 by a plurality of screw members or an adhesive in a state of extending in the vertical direction.
The wiring section 94 is formed by a printed wiring technique. The central conductor 18 of the cable section 16 and the second pin 68 are bonded to the wiring section 94 with a conductive adhesive 96 on each wiring section 94. In this state, each second pin 68 is exposed at the lower end surface of the receiving portion 88.

The cable 12 is assembled to the second base body 70 with the clamp 54 and the plurality of screw members 56 in a state where the conductor layer 22 is pressed. The first and second base bodies 72 and 74 are maintained at ground potential.

When the electric connector 60 is assembled as described above, the elastic body 30 is located between the first and second pins 66 and 68, and the first and second pins 6
6 and 68 are electrically connected by the conductive member 34 of the elastic body 30. The test electrical signal passes between the wiring portion 26 of the wiring board 62 and the conductor 18 of the cable 12 via the first pin 66, the conductive member 34, the second pin 68, and the auxiliary wiring portion 94.

In the connector 60, the first base body 72 may be separated from the wiring board 62 by removing the first base body 72 from the first holder 78.
The second base body 74 is removed from the first base member 74 by removing the screw member 92.
May be separated from the base body 72. In the latter case, the first base body 72 may be inseparably bonded to the wiring board 62 by an adhesive.

Since it is not necessary to use female pins in the connector 60, the cable 12
Is easy to connect and disconnect, electrical signal leakage between adjacent signal lines in connector 60 is prevented, and the frequency characteristics are improved. Each conductive member 3
4 and first and second pins 66, 68 connected thereto.
Can be maintained at a predetermined value.

Since the conductive layer 22 of each cable portion 16 is in contact with the second base body 74, the base 70
Itself is maintained at ground potential and external noise
In the signal line. Further, since the first holder 78 and the elastic plate 30 are arranged in the first and second recesses 82 and 84, respectively, the positional displacement of the first holder 78 and the elastic plate 30 with respect to the wiring board 62 and the base 70 is reduced. As a result, the electrical connection between the wiring portion 26 and the central conductor 18 is maintained well.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an electric connector according to the present invention, partially cut away.

FIG. 2 is a sectional view taken along line 2-2 in FIG.

FIG. 3 is a bottom view showing one embodiment of a tubular member used in the connector of FIG. 1;

FIG. 4 is a front view showing another embodiment of the electrical connector according to the present invention, with a part thereof cut away.

FIG. 5 is a sectional view taken along the line 5-5 in FIG. 4;

FIG. 6 is a plan view showing one embodiment of a first base body used in the connector of FIG. 4;

FIG. 7 is a front view of the first base body of FIG. 6;

FIG. 8 is a bottom view of the first base body of FIG. 6;

FIG. 9 is a sectional view taken along line 9-9 in FIG. 7;

FIG. 10 is a front view showing an embodiment of a second base body used in the connector of FIG. 4;

11 is a bottom view of the second base body of FIG.

FIG. 12 is a left side view of the second base main body of FIG. 10;

[Explanation of symbols]

 10, 60 Electrical connector 12 Flat cable 14, 62 Wiring board 16 Cable portion 18 Central conductor 20 Electrical insulating layer 22 Conductive layer 24 Outer skin 26 Wiring portion 30 Elastic plate 32, 70 Base 34 Conductive member 36 Elastic member 38 Electrical insulating plate 40, 72, 74 Base body 42, 64 Cylindrical part 46, 86, 90 Through hole 48, 50, 82, 84 Concave part 54 Clamp 66, 68 pin 76 Auxiliary substrate 78, 80 Holder 88 Receiving part 94 Auxiliary wiring part

Claims (8)

[Claims] 1. An electrical connector for connecting a cable having a plurality of cable parts to a wiring board having a plurality of wiring parts, the base being assembled to the wiring board, the base being an end of the cable being assembled. ,
An electrically insulating plate-shaped elastic member and an elastic plate having a plurality of elongated conductive members penetrating the elastic member in the thickness direction thereof, wherein the conductor of the cable and the wiring portion of the wiring board are at least An electrical connector electrically connected via a conductive member. 2. The base according to claim 1, further comprising: a base body detachably assembled to the wiring board; and an electrically insulating plate disposed on the base body, the conductive body forming a through hole for receiving a conductor of the cable portion. The electrical connector according to claim 1, further comprising: an electrical insulating plate having a plurality of cylindrical portions, wherein the elastic plate is disposed between the electrical insulating plate and the wiring board. 3. The base body has a plurality of second through holes for receiving an electrical insulation layer around the conductor, and the cable is clamped to the base body by a conductor layer around the electrical insulation layer. 3. The electrical connector of claim 2, wherein the electrical connector is assembled. 4. The base body further includes a first recess communicating with the second through-hole, and a second recess communicating with the first recess. 4. The electrical connector of claim 3, wherein the plate and the resilient plate are received in first and second recesses, respectively. 5. A plurality of first pins protruding from the wiring board into the base via the wiring portion, and a plurality of second pins arranged on the base and extending on an extension of the first pins. And a second pin electrically connected to a conductor of the cable section, wherein the base is a first base body disposed on the wiring board, wherein the first pin is assembled. A second base body disposed on a side of the first base body opposite to the wiring board, the second base body having a plurality of through holes for receiving the second pins. A base body, wherein the elastic body is arranged between the first and second pins, and a conductor of the cable and a wiring portion of the wiring board are connected to the first and second pins and the conductive member. Electrically connected through a conductive member The electrical connector according to claim 1, wherein 6. The first and second pins penetrate first and second holders, respectively, and the first base body further includes a first holder in which the first holder is received. A second recess for receiving the elastic body, the second recess being in communication with the first recess through the first through hole; The electrical connector according to claim 5, wherein the base body further includes a receiving portion that receives the second holder. 7. The electrical connector according to claim 5, wherein said first pin is fitted into a through hole formed in said wiring board. 8. An electrically insulating auxiliary substrate disposed on the second base main body, the auxiliary substrate having a plurality of auxiliary wiring portions, wherein the conductor and the second pin are electrically conductively bonded. The electrical connector according to claim 5, 6 or 7, wherein the electrical connector is connected to the auxiliary wiring portion by an agent.