JP2000228255A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector capable of passing a signal having a relatively high-frequency component and of surely bypassing a surge current from the outside including high-frequency components. SOLUTION: This connector is provided with multiple contacts 2 having conductivity, a dielectric film 3 formed so as to abut on each of the contacts 2, a metal plate 4 formed so as to abut on the surface opposite to the abutting surface of the dielectric film 3 on the contacts 2, and a connection member 5 having conductivity for connecting the metal plate 4 to a reference potential. Thereby, an inductance component and a D.C. resistance component of a capacitor formed in the connector can remarkably reduced, and as a result, a signal having a relatively high-frequency component can be passed, and a surge current from the outside including high-frequency components can surely be bypassed to the reference potential side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector,
In particular, the present invention relates to a connector suitable for transmitting a high-frequency signal and removing high-frequency noise.

[0002]

2. Description of the Related Art For example, when static electricity charged in a human body is discharged to an electronic device, it is known that in a discharge in the air, a current having a higher frequency component flows as the discharge gap becomes narrower. In the discharge when two objects collide, the discharge occurs when the dielectric breakdown voltage is reached just before the collision, but when the relative speed of the two objects collide is high, the voltage is higher than the dielectric breakdown voltage. To discharge. This means that a discharge occurs between moving objects even if the gap is narrower than between stationary objects at the same potential difference. That is, the discharge between the moving objects contains many high frequency components and generates a large current. Therefore, if the discharge of static electricity containing a large amount of such high frequency components and resulting in a large current is input to an electronic device through, for example, a cable for a signal or a power supply, it may cause a malfunction or a failure of the electronic component. It is necessary to prevent this. For example, as a method of preventing external surge current such as discharge of static electricity charged in a human body from entering a cable through an electronic device, conventionally, for example, a cable for a signal line or a power supply and an electronic device are used. Are connected by a connector provided on the printed wiring board of the electronic device, a capacitor is inserted between each terminal of the connector and the ground layer or power supply layer of the printed wiring board, and a Schottky diode is connected to each terminal of the connector by printed wiring. The plate was inserted between the ground layer and the power layer.

[0003]

However, in the above-mentioned method using a capacitor, there is a disadvantage that the waveform of the signal is distorted when the frequency of the signal input to each terminal of the connector becomes high due to the action of the capacitor. . In the above method, the capacitor is, for example,
Since the lead portion, the wiring portion, and the like have the DC resistance component ESR and the inductance component ESL, there is a disadvantage that the capacitor does not function as a capacitor as the signal frequency increases.
The DC resistance component ESR and the inductance component ESL of the capacitor sufficiently affect even a capacitor having a small capacity. For example, a signal of 1 GHz or more functions not as a capacitor but as an inductance. Loses the effect of absorbing water. The DC resistance component ESR of the capacitor used for the above-mentioned application is, for example, about 0.1 to 1Ω, and the inductance component ESL is, for example, 1 to 1Ω.
It is about nH.

Similarly, when a diode is used, the wiring for inserting and connecting the diode between each terminal of the connector and the ground layer or the power supply layer of the printed wiring board has an inductance component. Since the internal wiring has an inductance component, the same disadvantages as described above exist. Furthermore, since the capacitors and the diodes are mounted on the printed wiring board, there is a disadvantage that the area occupied by the printed wiring boards for the capacitors and the diodes increases.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and is intended to allow a signal having a higher frequency component to pass therethrough and to reliably bypass an external surge current containing a high frequency component. It is an object of the present invention to provide a connector capable of performing the following.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method of forming a plurality of contacts having electrical conductivity, a dielectric film provided to contact each of the contacts, and a contact of the dielectric film. A metal plate provided to be in contact with the back surface of the contact surface; and a conductive connection member for connecting the metal plate to a reference potential.

Each of the contacts has a connecting portion connected to various signal lines at one end, and a connecting portion connected to a wiring on a printed wiring board of the electronic device at the other end. The dielectric film is disposed on the dielectric film, and an intermediate portion is in contact with the dielectric film.

The middle part of each contact has a rectangular cross section, and one side surface of the middle part is in contact with the dielectric film.

The dielectric film and the metal plate have a predetermined width in the longitudinal direction of the contact, and the connecting member has a width substantially equal to the predetermined width of the dielectric film and the metal plate. It is composed of members.

The connection member connects a part of the metal plate to a reference potential wiring formed on a printed wiring board of the electronic device.

The dielectric film is made of polyimide or polystyrene.

The contact is made of a copper alloy plated with nickel.

[0013] The present invention also provides a connector having a plurality of contacts connected to various signal lines, wherein a dielectric film provided to contact each of the contacts, A metal plate sandwiching the dielectric film therebetween, and a connecting member having conductivity for connecting the metal plate to the metal plate at a reference potential, wherein each of the contacts and the metal plate is a capacitor. , And the dielectric film forms a capacitance.

The capacitance of the capacitor is adjusted by the thickness of the dielectric film.

According to the present invention, a dielectric film and a metal plate are provided for each contact, so that each contact, the dielectric film and the metal plate are provided between each contact and a reference potential. Is inserted.
Each contact and the metal plate constitute each electrode of the capacitor. As a result, the distance between each contact and the capacitor is completely zero, and wiring for connecting each contact to the capacitor is not required, and the inductance component and DC resistance component of the capacitor are reduced by eliminating the wiring. The high-frequency signal input to each contact easily passes without dulling the waveform, and an external surge current containing a high-frequency component is more reliably bypassed to the reference potential side through the metal plate and the connecting member.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a connector according to an embodiment of the present invention. The connector 1 shown in FIG. 1 has a plurality of contacts 2, a dielectric film 3, a metal plate 4, and a connection member 5.

The contact 2 has at one end a coupling portion 2a which is a female portion fitted by elastic deformation with a male portion of a connector connected to various signal lines, and has the connector 1 at the other end. A connection portion 2 having a shape enabling connection to a printed wiring board of a device by, for example, soldering.
b is formed. As the contact 2, for example, a copper alloy plated with nickel or a metal such as an aluminum alloy or gold can be used. Each contact 2 is provided on the dielectric film 3 in parallel with each other and at equal intervals. Each contact 2 has a rectangular cross section at an intermediate portion 2c between the coupling portion 2a and the connecting portion 2b, and a dielectric film 3 is attached to one side surface of the intermediate portion 2c by, for example, an adhesive. Is being worn. Each contact 2
Are, for example, 10 mm in length in the longitudinal direction, 0.3 mm in thickness and 0.3 mm in width, and the pitch between the contacts 2 is 0.8 mm.

The dielectric film 3 is attached to one side surface of the middle part 2c of each contact 2 and has a predetermined width in the longitudinal direction of the contact 2 and a predetermined size in the arrangement direction of the contact 2. have. The width of the dielectric film 3 in the longitudinal direction of the contact 2 is, for example, 5 mm. Dielectric film 3
For example, a plastic material such as polystyrene or polyimide, or an inorganic insulating material such as mica can be used. The thickness of the dielectric film 3 is, for example, 10
One having a range of about μm to 1 mm is used.

The metal plate 4 is adhered to the back surface of the dielectric film 3 and has a width and a dimension substantially the same as the width of the dielectric film 3 in the longitudinal direction of the contacts 2 and the dimension in the arrangement direction of the contacts 2. Have. As the metal plate 4, for example, a copper plate or an aluminum plate can be used. The width in the longitudinal direction of the contact 2 of the metal plate 4 is, for example, 5 mm, and the thickness is 0.3 mm.

The connecting member 5 is formed integrally with one end of the metal plate 3 and has a width substantially equal to the width of the metal plate 3 in the longitudinal direction of the contact 2. Is larger than the wiring. The connecting member 5 is a metal plate 3
It is formed from the same metal material as. The connection surface 5a of the connection member 5 is solder-connected to, for example, a ground wiring formed on a printed wiring board of an electronic device provided with the connector 1. Although the connector 1 having the above-described configuration is not shown in FIG. 1, each component constituting the connector 1 is fixed to a case made of an insulating material such as plastic.

FIG. 2 is a circuit diagram showing an electrical equivalent circuit of the connector 1 having the above configuration. As shown in FIG. 2, in the connector 1, each contact 2, the dielectric film 3 and the metal plate 4 constitute a capacitor C. The capacitor C is inserted between each contact 2 and the ground G. Have been. The connector 1 is provided with a connecting portion 2 of each contact 2.
has a DC resistance Rs and an inductance Ls between a and the connection 2b.

In the connector 1, the connecting portion 2a of each contact 2
When the signal input from the C passes through the capacitor C, the high frequency component is bypassed to the ground G by the capacitance of the capacitor C. That is, as can be seen from FIG. 2, in the connector 1, the DC resistance Rs and the inductance L
A low-pass filter is formed by s and the capacitor C, the signal component passes from the coupling part 2a of each contact 2 toward the connection part 2b, and the high-frequency noise component is cut by the low-pass filter. The cutoff frequency of the low-pass filter can be arbitrarily adjusted by adjusting the capacitance of the capacitor C. The capacitance of the capacitor C can be adjusted by adjusting the thickness of the dielectric film 3, which is a component of the capacitor C.

In the structure shown in FIG. 1, the signal input to the contact 2 has a voltage drop due to the DC resistance component Rs of the contact 2, and the higher the frequency of the signal component, the greater the attenuation due to the inductance component Ls. In the present embodiment, these voltage drops and attenuation are very small.

In the structure of this embodiment, since one of the electrodes of the capacitor C is constituted by each contact 2 of the connector 1, the length of the wiring 11 to the capacitor C shown in FIG. Thus, the inductance component ESL of the capacitor C is only the wiring 12 connecting the ground G and the capacitor C. The wiring 12 connecting the ground G and the capacitor C corresponds to the connecting member 5 shown in FIG. As described above, since the connection member 5 is considerably larger than the wiring of a normal printed wiring board, the inductance component of the connection member 5 is negligibly small. Therefore, on one electrode side of the capacitor C, since each contact 2 itself constitutes an electrode, there is no DC resistance component or inductance component of the wiring of the capacitor C on one electrode side, and The connection member 5 on the electrode side has a large cross section,
In addition, since it is directly connected to the printed wiring board, the DC resistance component and the inductance component on the other electrode side are negligibly small as compared with ordinary leads and wirings.

That is, in the structure of the connector 1 according to the present embodiment, the capacitor C is constituted by the contacts 2, the dielectric film 3 and the metal plate 4, and the DC component ESR and the inductance component E
SL is negligibly small, and the DC resistance Rs and the inductance Ls of the connector 1 belong to the contact 2 itself, and can be made extremely small. For this reason, in the structure of this embodiment, since only the DC resistance component and the inductance component of each contact 2 of the connector 1 act on the signal, the voltage drop of the signal and the attenuation of the high-frequency component of the signal are small. Also, the DC resistance component ES of the capacitor C
Since the R and the inductance component ESL are extremely small, a surge current including a high-frequency component input from the outside through each contact 2 can be reliably bypassed by the ground G.

For example, when the thickness of the dielectric film 3 in the structure of the connector 1 of this embodiment is 10 μm, the capacitance of the capacitor C is about 0.05 μF.
Further, the DC resistance Rs was 0.01Ω or less. This value corresponds to a voltage drop of 1 mV at a current of 100 mA,
Small enough. Further, the inductance Ls is 0.5
It was about nH. According to the connector 1 of the present embodiment,
In the values of the capacitance, DC resistance Rs and inductance Ls of the capacitor C, for example, 50 ns
The signal at the rising edge of c could be passed without dulling.

According to the structure of the connector 1 of the present embodiment, the contact 2 forms a part of the capacitor C, and
By providing the dielectric film 3 and the metal plate 4 with respect to the contact 2, the capacitor C can be formed collectively, so that a single electronic component such as a capacitor is mounted on the printed wiring board on which the connector 1 is provided. Therefore, there is no need to occupy a part of the printed wiring board by electronic components such as capacitors.

[0028]

According to the present invention, the inductance component and the DC resistance component of the capacitor formed in the connector can be greatly reduced, and as a result, a signal having a higher frequency component can be passed and a high frequency component can be passed. An external surge current including a frequency component can be reliably bypassed to the reference potential side. Further, according to the present invention, since the contact constitutes a part of the capacitor, and the dielectric film and the metal plate are provided for the contact, the capacitor can be constituted collectively, so that the connector There is no need to mount a single electronic component such as a capacitor on a substrate provided with the capacitor, and the electronic component such as a capacitor does not occupy a part of the substrate.

[Brief description of the drawings]

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

FIG. 2 is a circuit diagram showing an electrical equivalent circuit of the connector shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Connector, 2 ... Contact, 2a ... Coupling part, 2b ... Connection part, 3 ... Dielectric film, 4 ... Metal plate, 5 ... Connection member.

Claims (9)

[Claims] 1. A plurality of contacts having conductivity, a dielectric film provided to contact each of the contacts, and a back surface of a contact surface of the dielectric film with the contacts. And a conductive member for connecting the metal plate to a reference potential. 2. Each of the contacts has a connecting portion connected to various signal lines at one end and a connecting portion connected to a wiring on a printed wiring board of the electronic device at the other end. The connector according to claim 1, wherein the connector is disposed on the dielectric film in parallel, and a halfway portion is in contact with the dielectric film. 3. The connector according to claim 2, wherein a halfway portion of each contact has a rectangular cross section, and one side surface of the halfway portion is in contact with the dielectric film. 4. The dielectric film and the metal plate have a predetermined width in the longitudinal direction of the contact, and the connection member has a width approximately equal to the predetermined width of the dielectric film and the metal plate. 2. A structure comprising a member having a width.
A connector as described in. 5. The connector according to claim 1, wherein the connection member connects a part of the metal plate and a wiring of a reference potential formed on a printed wiring board included in the electronic device. 6. The connector according to claim 1, wherein said dielectric film is made of polyimide or polystyrene. 7. The connector according to claim 1, wherein said contacts are made of a copper alloy plated with nickel. 8. A connector having a plurality of contacts connected to various signal lines, wherein said connector is provided between said dielectric film provided to be in contact with said contacts and said plurality of contacts. A metal plate sandwiching a dielectric film, and a conductive connection member for connecting the metal plate to a reference potential, wherein each of the contacts and the metal plate constitutes an electrode of a capacitor; A connector in which a dielectric film forms the capacitance. 9. The capacitance of the capacitor is adjusted by the thickness of the dielectric film.
A connector as described in.