Electrical connector

An electrical connector includes a first terminal group, an insulation body, a conductive glue, and an insulation casing. The first terminal group includes grounding terminals and signal terminals. Each of the terminals in the first terminal group has a main portion. The insulation body is fixed to the main portion of each terminal of the first terminal group. The insulation body has openings exposing corresponding grounding terminals. The conductive glue fills the openings of the insulation body, and the conductive glue electrically connects the grounding terminals. The insulation casing includes a first side wall which includes first terminal slots. The first terminal group is disposed in the first terminal slots of the first side wall, and the conductive glue is sandwiched between the first side wall and the insulation body.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Taiwan Application Serial Number 106217029, filed Nov. 15, 2017, which is herein incorporated by reference.

BACKGROUND

Field of Invention

The present invention relates to an electrical connector structure. More particularly, the present invention relates to an electrical connector that is capable of adjusting high-frequency signal transmission.

Description of Related Art

With the rapid development of technology, the amount of data transmission increases accordingly, and thus conventional transmission devices cannot meet the current high efficiency requirements. An early Small Computer System Interface (SCSI) has been modified to become a current Serial Attached SCSI (SAS) which has broken through the upper limit of the original transmission speed. The SAS technology continues to improve in research and development, and thus the transmission speed is increased to 24.0 Gbps, in which the SAS technology that supports and is compatible with Serial Advanced Technology Attachment (SATA) has a common and wide range of advantages.

In order to achieve the convenience of portability and to meet the requirements of thinness and shortness, components are designed to be miniaturized, and an electrical connector tends to be smaller. In order to prevent serious signal attenuation, a signal source transmits messages at a higher frequency band when the electrical connector is in the process of signal transmission. Due to the miniaturization design of the electrical connector, gaps between adjacent terminals transmitting signals are greatly shortened. Because transmitting signals at use the high-frequency frequency band, the two adjacent terminals are highly susceptible to mutual high-frequency noise interference, such as cross talk, impedance, propagation delay, propagation skew, and attenuation, thus causing the signal transmission process to be distorted or have errors, greatly reducing the transmission efficiency of the electrical connector.

In order to overcome the interference problem between the terminals, various connectors on the market are designed with metal grounding parts, in which the metal grounding parts are formed by stamping and bending, and are disposed in the connector. To reduce high-frequency interference between the signal terminals, grounding terminals are connected by the metal grounding parts. However, contact surfaces between the metal grounding parts and the grounding terminals may have gaps or different surface areas, thus resulting in poor grounding effects. In addition, the metal grounding parts require additional manufacturing processes, thus increasing the manufacturing cost and the production time. Therefore, these conventional connectors still need to be improved.

U.S. Pat. No. 9,281,589 provides a solution. Referring toFIG. 9, this patent reference discloses a connector A. The connector A includes terminals C and an insulation casing E. The insulation casing E includes an upper side wall E1, a lower side wall E2, and a chamber E3which is sandwiched between the upper side wall E1and the lower side wall E2, in which a groove B is formed on an outer surface of the upper sidewall E1located away from the chamber E3, and the groove B has through holes B1that pass through the upper sidewall E1and expose grounding terminals. A conductive glue D is injected into the groove B. The conductive glue D fills the groove B and the through holes B1, and contacts the ground terminals of the terminals C until the conductive glue D is cured and shaped conformal the shape of the groove B and the through holes B1, and the conductive glue D has bumps D1. The bumps D1of the conductive glue D and the grounding terminals electrically connected to each other making the grounding terminals are electrically shorted to each other, so as to improve high frequency interference of the connector A.

It can be seen from the above description that the conductive glue D is disposed on the outer surface of the insulation casing E located away from the chamber E3. The method of fixing the conductive glue D is to fill the groove B with the conductive glue D in a liquid state, and when the conductive glue D is cured, the conductive glue D is adhered to the groove B. The material composition of the insulation casing E is different from that of the conductive glue D, and the conductive glue D is fixed on the surface of the insulation casing E after the insulation casing E is formed. Because the groove B and the through holes B1in the insulation casing E do not have designs for preventing the conductive glue D from falling off, the conductive glue D is very likely to fall off from the surface of the insulation casing E after the connector A has been used for several times, thus causing the connector A to have an incomplete structure which affects the quality and stability of signal transmission.

Since the conventional connectors have the defects affecting the transmission quality when the high-frequency signal is transmitted and cannot meet the actual industrial requirements, in order to improve the transmission quality and maximize the efficacy of the connector, an improvement for the structure of the connector design to solve the problem is greatly needed.

SUMMARY

The aspect of this disclosure is to design an electrical connector, in which the electrical connector includes conductive terminals forming terminal groups. The conductive terminals includes signal terminals and grounding terminals, in which each of the conductive terminals comprises a contact portion, a soldering portion, and a main portion connecting the contact portion and the soldering portion. An insulation body is fixed to each main portion of the conductive terminals of at least one terminal group. The insulation body has openings exposing corresponding grounding terminals. A conductive glue fills the openings of the insulation body, and the conductive glue electrically connects the grounding terminals. The grounding terminals are shorted through the conductive glue to enhance the shielding effect of the grounding terminals between the signal terminals and to reduce the crosstalk between the signal terminals.

Another aspect of this disclosure is to design an electrical connector, in which conductive terminals are disposed in terminal slots of an insulation casing, and the conductive glue is sandwiched between the insulation bodies and the insulation casing. The conductive glue is fixed in a groove of the insulation body by using the insulation casing, such that the conductive glue is firmly fitted to the insulation body. The conductive glue filling the openings is electrically connected to the grounding terminals, thereby preventing the conductive glue from falling off, thus maintaining the quality of signal transmission.

This disclosure provides an electrical connector to achieve the above objects. The electrical connector includes conductive terminals including signal terminals and grounding terminals, in which each of the conductive terminals includes a contact portion, a soldering portion, and a main portion connecting the contact portion and the soldering portion, and the conductive terminals include a first terminal group and a second terminal group. Insulation bodies includes a first insulation body and a second insulation body, in which the first insulation body is fixed to each main portion of the first terminal group, the second insulation body is fixed to each main portion of the second terminal group, and the insulation bodies has openings exposing the corresponding grounding terminals. A conductive glue is fixed in the openings of the insulation bodies such that the grounding terminals are electrically connected to each other. An insulation casing includes a first side wall, a second side wall and a bottom defining a abutting cavity, in which the first side wall and the second side wall are respectively located on two sides of the abutting cavity which are not adjacent to each other; the side walls includes terminal slots; the terminal slots include first terminal slots disposed on the first side wall and second terminal slots disposed on the second side wall; the bottom has at least one notch communicating with the terminal slots; the first terminal group is disposed on the first terminal slots of the first side wall; the second terminal group is disposed on the second terminal slots of the second side wall; and the insulation bodies are fixed to the notch corresponding to the bottom.

In order to further understand the features, characteristics and technical contents of this disclosure, refer the following detailed description of the disclosure and the accompany drawings. However, the accompany drawings are provided for reference only and are not to limited the present disclosure.

DETAILED DESCRIPTION

As shown inFIG. 1, an embodiment of the present disclosure discloses a high-frequency transmission electrical connector1. The electrical connector1includes conductive terminals2, insulation bodies3, a conductive glue4, and an insulation casing5. The electrical connector1may be fixed on a circuit board (not shown), and may be docked with a docking device (not shown).

In an embodiment of the present disclosure, as shown inFIG. 2andFIG. 3, the conductive terminals2of the electrical connector1include signal terminals21and grounding terminals22. Each of the conductive terminals2includes a contact portion23, a soldering portion25, and a main portion24connecting the contact portion23and the soldering portion25. The conductive terminals2are arranged side by side to form a first terminal group26, a second terminal group27, and a third terminal group28. The width of the conductive terminals2is defined by the thickness of the conductive terminals2in the side-by-side arrangement direction. As shown inFIG. 3, the width of the conductive terminal2is defined by the thickness of between the opposite surfaces of each of the conductive terminals2perpendicular to an X-axis direction, in which each of the main portions24and its corresponding contact portion23include at least one inclined surface therebetween. Through the inclined surface, the width of the main portions24is gradually decreasing to the width of the contact portions23, thereby preventing an abrupt change in electrical characteristics. The width of each of the contact portions23is smaller than the width of each of the main portions24, such that the distances between the contact portions23of most of the conductive terminals2are greater than the distances between the main portions24. The cross-sectional areas of the contact portions23are smaller than the cross-sectional areas of the main portions24. Accordingly, when the conductive terminals2are connected to the docking device, due to the increase of the distance between the adjacent contact portions23or the decrease of the areas of two adjacent opposite surfaces of the contact portions23, the capacitance effect between the conductive terminals2is reduced and the interference between the conductive terminals2is improved.

The electrical connector1is used for transmitting high-frequency signals. If the conventional transmission structure is adopted, cross talk and other high-frequency interference problems are likely to occur between two adjacent signal terminals21, thus affecting the accuracy and efficiency of signal transmission. In order to overcome this problem, the signal terminals21transmit high-frequency signals by specifically using differential signal pairs. Each of the differential signal pairs use two signal terminals21to transmit the differential signal at the same time, in which the amplitude of the two signals of the differential signal is the same, but the phases thereof are opposite, such that interference can be effectively canceled. With this data transmission method, electromagnetic interference can be effectively suppressed and timing sequence is accurate, thereby improving the quality and efficiency of signal transmission. In order to avoid interference between two pairs of differential signal terminals, the grounding terminals22are respectively designed on two outer sides of the differential signal terminal pair, and the grounding terminals22separate the two adjacent sets of the differential signal terminal pairs. The grounding terminals22can absorb and ground the interference noise generated by the differential signal terminal pairs, and can effectively shield the differential signal terminal pairs from interference. Therefore, the conductive terminals2are arranged in the order of ground-signal -signal -ground (G-S-S-G), so as to achieve better high frequency signal transmission efficiency.

In the embodiment of the present disclosure, the insulation bodies3are respectively fixed to the main portions24of at least one terminal group by insert molding. In this embodiment, the insulation bodies3include a first insulation body34and a second insulation body35. The first insulation body34is fixed to each main portion24of the conductive terminals2of the first terminal group26. The second insulation body35is fixed to each main portion24of the conductive terminals2of the second terminal group27. The insulation bodies3have openings31. The openings31may or may not pass through the insulation bodies3. The openings31respectively expose the grounding terminals22covered by the insulation bodies3. The insulation bodies3have at least one channel32, and the channel32is a groove structure formed on the surfaces of the insulation bodies3. The openings31are respectively located on the surface of the insulation body3in the channel32. At least one surface of each insulation body3includes the openings31and the channel32. The channel32includes parallel sections321and a vertical section322. The openings31are respectively located in the parallel sections321, and each opening31is corresponding to a parallel section321, and the parallel section321is parallel to the extending direction of the conductive terminals2. The vertical section322is connected to the parallel sections321, and the vertical section322is perpendicular to the extending direction of the conductive terminals2. The insulation bodies3have the parallel sections321and the vertical section322to increase the contact surface are of the channels32, thereby enhancing the bonding strength between the conductive glue4and the insulation bodies3.

In the embodiment of the present disclosure, referring toFIGS. 3, 4, 4-1, 4-2, 5, 5-1 and 5-2which are cross-sectional views of the first terminal group26and the second terminal group27. The conductive glue4includes a first conductive portion41and a second conductive portion42, in which the first conductive portion41is mounted on the first insulation body34, and the second conductive portion42is mounted on the second insulation body35. The conductive glue4is fixed on the openings31and the channel32of the surface of the insulation body3, in which the conductive glue4can be respectively fixed by filling or assembling. The channels32provide space for accommodating the conductive glue4. The conductive glue4fill in each of the openings31and the conductive glue4electrically connect the grounding terminals22exposed through the openings31. The conductive glue4is connected to the grounding terminals22across the signal terminals21in the form of a bridge. When the conductive glue4is applied and molded, the liquid conductive glue4is injected into the channel32and the openings31on the surfaces of the insulation bodies3, such that the conductive glue4is in physical contact with the grounding terminals22. After the filling operation is completed, the conductive glue4may be changed from a liquid state to a solid state by heat curing or room temperature curing, such that the conductive glue4is fixed in the channel32, and the grounding terminals22are electrically connected by the conductive glue4. If the conductive glue4is assembled, the conductive glue4is molded to conform to the structure of the openings31and the channel32at first, and then the cured structure of the conductive glue4is fixed in the openings31and the channel32in a manner of stamping or assembly. The structure of the conductive glue4is not limited to being in electrical contact with the grounding terminals22, but can be electromagnetically connected with the grounding terminals22at a tiny distance. The conductive glue4is used to provide the function of electrically balancing the ground terminals22. The potential of each of the ground terminals22is adjusted. When one of the ground terminals22receives a large interference, the conductive glue4can transmit the noise to the other ground terminals22, so as to maintain the shielding effect of the ground terminals22.

The conductive glue4is mainly composed of matrix resin, conductive filler and dispersant. The matrix resin may include an adhesive system such as an epoxy resin, an organic silicone resin, a polyimide resin, a phenol resin, a polyurethane, an acrylic resin, etc. The conductive filler may include powders of Au, Ag, Cu, Al, Zn, Fe, Ni, and Graphite, and the conductive filler is composed of one or more of the aforementioned elements and some conductive compounds. The particle size of the conductive filler powder has to meet the appropriate size that can be added to the matrix resin and can be allowed a dispersant to be added therein, such that the conductive filler powder may be evenly distributed in the matrix resin to achieve the effect of uniform conductivity. The curing temperature of the conductive glue4is generally lower than the soldering temperature. The conductive glue4can be used to replace solder, thereby reducing the damage of the electronic components caused by the high temperature of the soldering operation, and the technology of using the conductive glue4is simple and easy to be operated, thereby improving the production efficiency.

In the embodiment of the present disclosure, referring toFIG. 2,FIG. 6andFIG. 8, the insulation casing5is made of plastic material. The insulation casing5includes a first side wall51, a second side wall52, a third side wall53, a fourth side wall54, and a bottom55. The first side wall51and the second side wall52are oppositely disposed, and the third side wall53and the fourth side wall54are oppositely disposed. The third side wall53and the fourth side wall54are both connected to the first side wall51and the second side wall52and form an abutting cavity56. The first side wall51and the second side wall52are respectively located on the two non-adjacent sides of the abutting cavity56. The first side wall51and the second side wall52respectively includes a plurality of terminal slots57. The bottom55closes one end of the abutting cavity56and the other end of the abutting cavity56has an opening561to be connected with the docking device. The bottom55is connected to the first side wall51, the second side wall52, the third side wall53, and the fourth side wall54. The bottom55includes at least one notch6that is open at the surface of the bottom55. In this embodiment, the notch6includes a first notch61and a second notch62, the first notch61and the second notch62are respectively independent and not communicated with each other

In the embodiment of the present disclosure, referring toFIG. 6,FIG. 7andFIG. 8, the terminal slots57are formed by a plurality of partition walls58. The terminal slots57respectively include a plurality of first terminal slots571, a plurality of second terminal slots572, and a plurality of third terminal slots573. The first terminal slots571respectively disposed on the first sidewall51, the second terminal slots572and the third terminal slots573respectively disposed on the second sidewall52. The terminal slots57respectively pass through the bottom55to allow the first terminal slots571to communicate with the first notch61. The second terminal slots572communicate with the second notch62. A partition wall58is disposed between two adjacent terminal slots57. The partition walls58extend from the end of the opening561of the abutting cavity56toward bottom55. The partition walls58is adjacent to the opening561of the abutting cavity56and has a supporting plate59for connecting with each other. The partition walls58are used to separate two adjacent terminal slots57. The partition walls58provide accurate positioning of the conductive terminals2so as to reduce the interference between signals of the two adjacent conductive terminals2.

In the embodiment of the present disclosure, referring toFIG. 2,FIG. 4andFIG. 6, the conductive terminals2of the first terminal group26are respectively mounted on the first terminal slots571of the first sidewall51by the first notch61of the bottom55corresponding to the first terminal slots571. The front ends of the contact portions23of the conductive terminals2of the first terminal group26respectively abut against the supporting plate59. The supporting plate59connects the partition walls58on the two sides of the first terminal slots571, and the supporting plate59is adjacent to the opening561of the abutting cavity56. The contact portions23protrude from the partition walls58on the first sidewall51respectively and extend into the abutting cavity56. The first insulation body34is fixed in the first notch61of the bottom55corresponding to the first terminal slots571. The soldering portions25extend out of the insulation casing5from the first insulation body34. The soldering portions25can be fixed to the circuit board by a surface mount technology (SMT) or a dual in-line package (DIP) method. The first conductive portion41is sandwiched between the first sidewall51and the first insulation body34. The first conductive portion41is stably fixed in the first insulation body34by the first sidewall51to reduce the risk of the first conductive portion41falling off.

In the embodiment of the present disclosure, referring toFIG. 2,FIG. 7andFIG. 5, the conductive terminals2of the second terminal group27are respectively mounted on the second terminal slots572of the second sidewall52by the second notch62of the bottom55corresponding to the second terminal slots572. The front ends of the contact portions23of the conductive terminals2of the second terminal group27respectively abut against the supporting plate59, and the supporting plate59connects the partition walls58on the two sides of the second terminal slots572, and the supporting plate59is adjacent to the opening561of the abutting cavity56. The contact portions23protrude from the partition walls58on the second sidewall52respectively and extend into the abutting cavity56. The second insulation body35is fixed in the second notch62of the bottom55corresponding to the second terminal slots572. The soldering portions25extend out of the insulation casing5from the second insulation body35. The soldering portions25can be fixed to the circuit board by a surface mount technology (SMT) or a dual in-line package (DIP) method. The second conductive portion42which is connected to the grounding terminals22is fixed to the second insulation body35. The second conductive portion42is sandwiched between the second sidewall52and the second insulation body35. The second conductive portion42is stably fixed in the second insulation body35by the second sidewall52to reduce the risk of the second conductive portion42falling off.

In the embodiment of the present disclosure, referring toFIG. 4andFIG. 5, the first terminal group26and second terminal group27respectively include two differential signal terminal pairs and three grounding terminals22. A differential signal terminal pair is disposed between the two adjacent ground terminals22, and insulation body3covers the main portions24of the differential terminal pairs and the grounding terminals22. Since the insulation body3has a higher permittivity value than air permittivity, a large capacitance effect is likely to occur between two pairs of differential signal terminals coated in the insulating body3, thereby affecting the impedance values of the conductive terminals2. In order to maintain the impedance of the conductive terminals2consistent, capacitance is given by C=ϵA/d, which is obtained by solving Gauss's law, where C is the capacitance in parallel per unit length, ϵ is the permittivity of the dielectric in the capacitors, A is the area of the two plates in the capacitor, and d is the distance between the two plates in the capacitor. When the dielectric of the capacitor is changed, the capacitance value is also changed along with it. In this embodiment, the capacitance values of the conductive terminals2covered by the insulating bodies3are greater than the capacitance values of the conductive terminals2exposed in the air. ln order to maintain the same capacitance value, in addition to the method of reducing the area of the opposing surfaces between the conductive terminals2, the distance between the conductive terminals2may also be increased to improve the impedance vale caused by the difference in capacitance between the conductive terminals2.

In the embodiment of the present disclosure, referring toFIG. 2, since the widths of the contact portions23of the conductive terminals2are smaller than the widths of the main portions24, the distance between the contact portions23is greater than the distance between the main portions24. Due to the greater distance between the contact portions23, the capacitive effect generated is reduced when the high-frequency signal is transmitted. Grooves33are disposed on the surface of the second insulation body35of the second terminal group27, and the corresponding conductive terminals2are exposed from the grooves33to contact air. Since the air has a lower permittivity than the second insulation body35, the accumulation of charges of the main portions24covered by the second insulation body35is reduced, and the capacitive effect of the differential terminal signal pairs in the second insulation body35can be effectively reduced so as to maintain the impedance consistency of the conductive terminals2. In other embodiments, the second terminal group27is not limited to the above-mentioned features. The first terminal group26may also adopt the above-mentioned features of expose the conductive terminals2to air by the grooves33of the insulation body3to reduce the problem of high-frequency interference.

In the embodiment of the present disclosure, referring toFIG. 3andFIG. 8, the conductive terminals2of the third terminal group28are respectively inserted into the third terminal slots573through the openings of the third terminal slots573on the bottom55. The front ends of the contact portions23of the conductive terminals2of the third terminal group28respectively abut against the supporting plate59. The supporting plate59connects the partition walls58on the two sides of the third terminal slots573, and the supporting plate59is adjacent to the opening561of the abutting cavity56. The contact portions23protrude from the partition walls58on the second sidewall52respectively and extend into the abutting cavity56. The widths of the main portions24are greater than the widths of the contact portions23. The main portions24are respectively engaged with a pair of concave portions583on the two opposite surfaces of the partition walls58in the third terminal slots573. The concave portions583are adjacent to the bottom55. Each concave portion583includes at least one stepped structure to prevent the conductive terminals2from being separated backward or forward. The main portions24can be designed with barbs, and the barbs can be fixed to the partition walls58at both sides of the main portions to increase the frictional force of the conductive terminals2, thereby preventing the conductive terminals2from being separated from insulation casing5by force. The soldering portions25extend out of the insulation casing5from corresponding main portions24. The soldering portions25can be fixed to the circuit board by a surface mount technology (SMT) or a dual in-line package (DIP) method.

In the embodiment of the present disclosure, referring toFIG. 6andFIG. 7, the partition walls58of the first side wall51and the second side wall52of the insulation casing5extend from the opening561adjacent to the abutting cavity56to the bottom55to form the first terminal slots571and the second terminal slots572. The partition walls58include first partition walls581and second partition walls582. The order of the conductive terminals2accommodated in the terminal slots57is (G-S-S-G-S-S-G). That is, each differential terminal signal pair is respectively disposed between the two grounding terminals22and only one grounding terminal22is provided between the two differential terminal signal pairs. The grounding terminals22provide the functions of shielding and separation respectively. A first partition wall581is disposed between the two signal terminals21of each differential signal pair. A second partition wall582is arranged between each signal terminals21and each grounding terminals22. The first partition wall581completely separate the terminal slots57on its both sides, and the first partitioning walls581extend from the opening561of the abutting cavity56of the insulation casing5and abut the corresponding insulation body3, such that the space between the terminal slots57on both sides of the first partition walls581are not communicated with each other.

The length of the second partition walls582is shorter than the first partition walls581. The length of the second partition walls582is about one-third of the length of the first partition walls581. Each second partition wall582includes a passageway584, and the passageways584are located between the second partition wall582and the insulation body3. The passageways584allow the space of the terminal slots57on two sides of each of the second partition walls58to communicate with each other. Through the passageways584, the grounding terminals22can absorb and shield the noise and interference generated when the signal terminals21transmit high-frequency signals. Although the high-frequency signals transmitted by the two signal terminals21of the same differential signal terminals pairs have the same amplitudes, yet due to the opposite phases, the mutual interference can be effectively canceled. However, high-frequency interference still exists between the two differential terminal signal pairs. Therefore, the passageways584of the second partition walls582between the two differential signal terminal pairs expose the grounding terminals22, respectively. The grounding terminals22absorb the noise and interference generated by the signal terminals21, so as to reduce high-frequency interference between multiple pairs of differential terminal signal pairs and achieve better transmission quality of the electrical connector1. The grounding terminals22are electrically connected to each other by using the conductive glue4so that the potential of each grounding terminal22is consistent.

In the embodiment of the present disclosure, the front end of the contact portion23of each conductive terminal2exerts a force on each of the supporting plates59corresponding to the first sidewall51and the second sidewall52. The front ends of the contact portions23are constrained to the supporting plate59, such that the contact portions23can only be elastically deformed in the direction opposite to the supporting plate59, thus causing the contact portions23to be stressed by a pre-load provided by supporting plates59when the contact portions23are not docked with the docking device. When the electrical connector1is docked with the docking device, the contact portions23of each of the conductive terminals2can output a larger positive force, such that each of the contact portions23of the conductive terminals2and the docking device are connected closer with each other, thereby further stabilizing the signal transmission of the electrical connector1.

Compared with the prior art, the present disclosure provides a further improvement on the design of the conductive terminals2of the electrical connector1for transmitting high-frequency signals. The ground terminals22are electrically connected to each other so that the potential of the grounding terminals22to reach consistent. Many connectors use metal grounding plates to connect the grounding terminals inside conventionally, and there may be large gaps between the grounding terminals and the metal grounding plates, thus affecting the grounding effect, causing the potential of the ground terminals to be inconsistent, and the metal grounding plates require additional process and consume more time and cost. In addition to the design of the metal grounding plate, the conventional connector also has the design of forming holes on the surface of the insulating casing into the conductive glue, in which the conductive glue is likely to fall off after the connector has been used repeatedly. In order to ensure the stability of the connector, the present disclosure uses the conductive glue4, the insulation body3, and the insulation casing5to achieve the purpose of connecting the conductive terminals2and fixing the conductive glue4. Since technique of connecting the grounding terminals22of the conductive glue4is simple, the conductive glue4fills the openings31and the channel32of each insulation bodies3in a liquid state, and the grounding terminals22are respectively exposed to the openings31. After the conductive glue4is cured, the grounding terminals22are electrically connected by conductive glue4, the potentials of the grounding terminals22reach consistent, and the noise generated by the signal terminals21is shielded, and the insulation bodies3are touched closely to the insulation casing5each other, respectively. The conductive glue4is stably sandwiched between the insulation bodies3and the insulation casing5to prevent the conductive glue4from falling off caused by the repeated use of the electrical connector1and to provide the better reliability of the electrical connector1and further solve the problem of high frequency interference between the differential signal terminal pairs of the electrical connector1.