USRE49901E1 - Electrical receptacle for transmitting high speed signal - Google Patents

Abstract

An electrical connector includes an insulative housing defining a front cavity for receiving and a rear cavity, a terminal assembly assembled in the rear cavity, and a ground member. The terminal assembly includes an upper terminal module, a lower terminal module sandwiching a shielding module therebetween. Said The upper terminal module includes a pair of upper ground terminals. Said The lower terminal module includes a plurality of lower ground terminals. Said The shielding module includes a metallic shielding plate. The ground member is associated with the shielding module to mechanically and electrically connect at least one of the upper ground terminals and the lower ground terminals with the shielding plate.

Description

The present application is a reissue application of U.S. Pat. No. 10,367,308, issued Jul. 30, 2019, filed as U.S. application Ser. No. 15/795,234 on Oct. 26, 2017. The Ser. No. 15/795,234 application claims the benefit of U.S. Provisional Application No. 62/412,841 filed Oct. 26, 2016.

BACKGROUND OF THE INVENTION1. Field of the Invention

The invention relates to an electrical receptacle, and particularly to the electrical receptacle adapted for transmitting high speed signal.

2. Description of Related Art

Currently high speed electrical connector has a plurality of electrical lanes. Each of the electrical lanes may run at the rate of 25 Gbit/s or 50 Gbit/s. U.S. Pat. No. 8,764,464, issued to Buck et al., on Jul. 1, 2014, discloses example electrical connectors including a plurality of electrical contacts configured to communicate between electrical devices. The plurality of electrical contacts includes a plurality of ground contacts. A ground coupling assembly is configured to electrically connect ground contacts of an electrical connector to adjust a performance characteristic of the electrical connector as desired.

U.S. Pat. No. 7,798,820, issued on Sep. 21, 2010, discloses an optical transceiver module including an edge connector and a female host connector. The female host connector includes a row of first terminals having first contact sections, a row of second terminals having second contact sections, a row of third terminals having third contact sections and a row of the fourth terminal having fourth contact sections. The first contact section forwardly extends beyond the second contact section. The fourth terminal is in front of the third terminal. The edge connector includes a mating circuit board, the mating circuit board defines a number of contact pads on top of board and bottom of board. The contact pads includes a row of first pads and a row of second pads on the top of board, a row of third of pads and a row of fourth pads on the bottom of board. The first contact section connects with the first pad, the second contact section connects with the second pad, the third contact section connects with the third pad, and the fourth contact section connects with the fourth pad.

U.S. Pat. No. 8,727,793, issued on May 20, 2014, discloses a small SFP board with an end portion configured to be insert into a connector device. The SFP board has a first set of signal pads and a fourth set of signal pads on top surface, a second set of signal pads and a third set of signal pads on bottom surface. The fourth set of signal pads are offset in a longitudinal direction from the first set signal pads on the top surface. The third set of signal pads are offset in a longitudinal direction from the second set signal pads on the bottom surface.

An improved better high-frequency performance of the electrical receptacle is desired.

SUMMARY OF THE INVENTION

An object of the present invention, is to provide an electrical receptacle having means to transmit high speed signal.

To achieve the above-mentioned object, an electrical receptacle mounted onto a host board and electrically connecting with a mating electrical circuit board, comprising an insulative housing; and a row of first terminals, a row of second terminals, a row of third terminals, and a row of fourth terminals arranged along a vertical direction and mounted in the insulative housing, the first terminals and the fourth terminals forming a first mating port, the second terminals and the third terminals forming a second mating port, the first mating port forwardly extending beyond the second mating port; wherein the row of first terminals align with the row of second terminals along a up-to-down direction, the row of third terminals align with the row of fourth terminals along an up-to-down direction, the first terminals and the second terminals are offset in a longitudinal direction from the third terminals and the fourth terminals.

Another object of the present invention, is to provide an electrical receptacle having means to transmit high speed signal.

To achieve the above-mentioned object, an electrical receptacle for mating with a plug connector, comprising an insulative housing defining a front card receiving space and a rear module receiving space; a terminal module received within the module receiving space and comprising an upper half module and a lower half module stacked with each other in a vertical direction; said upper half module including an upper front part and an upper rear part cooperating with each other to sandwich an upper shielding plate therebetween in the vertical direction, the upper front part including a plurality of upper front terminals integrally formed with an upper front insulator via insert-molding, the upper rear part including a plurality of upper rear terminals integrally formed with an upper rear insulator via insert-molding, said upper shielding plate forming a plurality of upper springs extending upwardly through corresponding holes in the upper front insulator to mechanically and electrically connect corresponding upper front terminals for grounding, and a plurality of lower springs extending downwardly through corresponding holes to mechanically and electrically connect corresponding upper rear terminals for grounding; wherein front contacting sections of the upper front terminals and those of the upper rear terminals are located on a same upper side of the card receiving space.

Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG.1 is a perspective view of an electrical connector assembly according to the present invention;

FIG.2 is a part of exploded view of the electrical connector assembly as shown inFIG.1;

FIG.3 is another part of exploded view of the electrical connector assembly as shown inFIG.1;

FIG.4 is an exploded view of the electrical connector assembly as shown inFIG.1;

FIG.5 is a perspective view of a first embodiment of the electrical receptacle according to the present invention;

FIG.6 is a part of exploded view of the electrical receptacle as shown inFIG.5;

FIG.7 is another part of exploded view of the electrical receptacle as shown inFIG.5;

FIG.8 is a left view of the terminal modules;

FIG.9 is a perspective view of second contact section of second terminal receiving in second guide groove and third contact section of third terminal receiving in third guide groove;

FIG.10 is another perspective view of the second contact section of the second terminal receiving in the second guide groove and the third contact section of the third terminal receiving in the third guide groove as shown inFIG.9;

FIG.11 is an exploded view of the four terminal modules;

FIG.12 is another exploded view of the four terminal modules as shown inFIG.11;

FIG.13 is an upward view of the terminal modules mounted in the insulative housing;

FIG.14 is a cross-section view of the electrical receptacle tacked along line14-14 ofFIG.5;

FIG.15 is a cross-section view of the electrical receptacle tacked along line15-15 ofFIG.5;

FIG.16 is a top view of the terminals;

FIG.17(A) is a downward perspective view of the electrical receptacle according to a second embodiment of the invention;

FIG.17(B) is an upward perspective view of the electrical receptacle ofFIG.17;

FIG.18(A) is a downward exploded perspective view of the electrical receptacle ofFIG.17(A);

FIG.18(B) is an upward exploded perspective view of the electrical receptacle ofFIG.18(A);

FIG.19(A) is a downward exploded perspective view of the terminal module of the electrical receptacle ofFIG.18(A);

FIG.19(B) is an upward exploded perspective view of the terminal module of the electric receptacle ofFIG.19(A);

FIG.20 is a side view of the terminal module ofFIG.19A);

FIG.21(A) is a downward further exploded perspective view of the terminal module of the electrical receptacle ofFIG.19(A);

FIG.21(B) is an upward further exploded perspective view of the terminal module of the electrical receptacle ofFIG.19(B);

FIG.22(A) is a downward further exploded perspective view of the terminal module of the electrical receptacle ofFIG.21(A);

FIG.22(B) is an upward further exploded perspective view of the terminal module of the electrical receptacle ofFIG.22(A);

FIG.23 is a bottom view of the electrical receptacle ofFIG.17(A);

FIG.24(A) is a cross-sectional view of the unassembled electrical receptacle ofFIG.17(A), taken in a vertical plane extending in a front-to-back direction where the terminals of the upper part of the terminal module are located;

FIG.24(B) is a cross-sectional view of the unassembled electrical receptacle ofFIG.17(A), taken in another vertical plane extending in a front-to-back direction where the terminals of the lower part of the terminal module are located;

FIG.25(A) is a cross-sectional view of the assembled electrical receptacle ofFIG.17(A), taken in a vertical plane extending in a front-to-back direction where the terminals of the upper part of the terminal module are located;

FIG.25(B) is a cross-sectional view of the assembled electrical receptacle ofFIG.17(A), taken in another vertical plane extending in a front-to-back direction where the terminals of the lower part of the terminal module are located;

FIG.26(A) is a perspective view of an electrical connector assembly named QSFP-DD according to the invention, including the electrical receptacle ofFIG.5, and the corresponding plug connector similar to what is disclosed in the previously filed provisional applications mentioned in this disclosure;

FIG.26(B) is another perspective view of the electrical connector assembly ofFIG.26(A);

FIG.27 is a perspective view the plug connector ofFIG.26(A);

FIG.28 is an exploded perspective view of the plug connector ofFIG.27;

FIG.29(A) is a further exploded perspective view of the plug connector ofFIG.28;

FIG.29(B) is another further exploded perspective view of the plug connector ofFIG.28;

FIG.30(A) is a top view of the internal printed circuit board of the plug connector ofFIG.27;

FIG.30(B) is a bottom view of the internal printed circuit board of the plug connector ofFIG.27; and

FIG.31 is a cross-sectional view of the assembled plug connector and receptacle ofFIG.26(A).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Reference will now be made in detail to the preferred embodiment of the present invention. Referring toFIGS.1-6, anelectrical connector assembly100 includes a shielding shell orcage10, a number of first embodiment ofelectrical receptacles200 mounted onto ahost board300 and electrically connecting with mating electrical circuit boards. Theelectrical receptacle200 includes aninsulative housing20, and a number of terminal modules mounted in theinsulative housing20. The terminal modules include afirst terminal module30, asecond terminal module40, a thirdterminal module50, and afourth terminal module60 arranging along an up-to-down direction. A shieldingplate12 is set between twoadjacent insulative housings20. The shieldingshell10 definesholes11 on top face. Theelectrical connector assembly100 further includesheat sinks70 mounted in theholes11, aretainer80 fastening the whole heat sinks70 on the shieldingshell10, and a number oflight pipe90 mounted on the heat sinks70.

Referring toFIGS.5-8, thefirst terminal module30 includes a top row offirst terminals31, a firstinsulative body32 over-molded on thefirst terminal31, and afirst position part33 over-molded on thefirst terminal31. Thesecond terminal module40 includes a row ofsecond terminal41 under thefirst terminal31, a secondinsulative body42 over-molded on thesecond terminal41, and asecond position part43 over-molded on thesecond terminal42. Thethird terminal module50 includes a row ofthird terminals51 under thesecond terminal41, a thirdinsulative body52 over-molded on thethird terminal51, and athird position part53 over-molded on thethird terminal51. Thefourth terminal module60 includes a row offourth terminals61 under thethird terminal51, a fourthinsulative body62 over-molded on thefourth terminals61. The first andsecond terminals31,41 electrically connect to a top surface of the mating electrical circuit board, the third andfourth terminals51,61 electrically connect to a bottom surface of the mating electrical circuit board.

Referring toFIG.12,FIGS.14-15, thefirst terminal31 includes afirst contact section310 forwardly extending from the firstinsulative body32, a firsthorizontal section311 connecting with thecontact section310, a firstvertical section312 perpendicular to the firsthorizontal section311, and afirst soldering portion313 perpendicular to the firstvertical section312. The firsthorizontal section 311 and the firstvertical section 312 are commonly formed as a first body portion integrally connected between thefirst contact section 310 and thefirst soldering portion 313. The firstinsulative body32 is over-molded on the firsthorizontal section311, thefirst position part33 over-molded on the firstvertical section312. Thesecond terminal41 includes asecond contact section410 forwardly extending from the secondinsulative body42, a secondhorizontal section411 connecting with thesecond contact section410, a secondvertical section412 perpendicular to the secondhorizontal section411, and asecond soldering portion413 perpendicular to the secondvertical section412. The secondhorizontal section 411 and the secondvertical section 412 are commonly formed as a second body portion integrally connected between thesecond contact section 410 and thesecond soldering portion 413. The secondinsulative body42 is over-molded on the secondhorizontal section411, thesecond position part43 over-molded on the secondvertical section412. Thethird terminal51 includes athird contact section510 forwardly extending from the thirdinsulative body52, a thirdhorizontal section511 connecting with thethird contact section510, a thirdvertical section512 perpendicular to the thirdhorizontal section511, and athird soldering portion513 perpendicular to the thirdvertical section512. The thirdhorizontal section 511 and the thirdvertical section 512 are commonly formed as a third body portion integrally connected between thethird contact section 510 and thethird soldering portion 513. The thirdinsulative body52 is over-molded on the thirdhorizontal section511, thethird position part53 over-molded on the thirdvertical section512. Thefourth terminal61 includes afourth contact section610 forwardly extending from the fourthinsulative body62, a fourthhorizontal section611 connecting with thefourth contact section610, a fourthvertical section612 perpendicular to the fourthhorizontal section611, and afourth soldering portion613 perpendicular to the fourthvertical section612. The fourthhorizontal section 611 and the fourthvertical section 612 are commonly formed as a fourth body portion integrated connected between thefourth contact section 610 and thefourth soldering portion 613. The fourthinsulative body62 is over-molded on the fourthhorizontal section611.

Referring toFIGS.5-7,FIGS.9-12, theinsulative housing20 includes amating face21, atop surface22 and abottom surface23. Thetop surface22 defines a row offirst guide grooves34 for received receiving thefirst contact section310. Thebottom surface23 defines a row offourth guide grooves64 for received receiving thefourth contact section610. The firstinsulative body32 defines a row ofsecond guide grooves44 for received receiving thesecond contact section410 in bottom face. The fourthinsulative body62 defines a row ofthird guide groove54 for received receiving thethird contact section510. Thefirst contact section310 and thefourth contact section610 forwardly extend beyond thesecond contact section410 and thethird contact section510. Thefirst contact sections310 of thefirst terminals31 and thefourth contact sections610 of thefourth terminals61 form afirst mating port24. Thesecond contact sections410 of thesecond terminals41 and thethird contact sections510 of thethird terminals51 form asecond mating port25. Thefirst mating port24 forwardly extends beyond thesecond mating port25. Theinsulative housing20 defines a number of fixedslots29 at rear face of thebottom surface23, the fourthvertical section612 received in the fixedslot29. The first, second, thirdvertical section312,412,512 are respectively insert-molded in the first, second,third position part33,43,53 in a whole row. These designs are in order to that the first, second, third,fourth soldering portion313,413,513,613 are respectively surface welded on thehost circuit board300 easily. Theinsulative housing20 also includes twoside walls26 connecting thetop surface22 and thebottom surface23. Both of theside walls26 respectively define aposition slot27 on opposite faces. All of the first, the second, and thethird position parts33,43,53 define abump28 at both ends. Thebump28 is received in theposition slot27 to position the first, the second, and thethird soldering portion313,413,513. As clearly shown in FIGS. 14 and 15, thehousing 20 forms acard receiving space 201 between adownward face 221 and anupward face 231 which are opposite to each other in the vertical direction. The firstinsulative body 32 forms a downward/bottom face 321 horizontally coplanar with thedownward face 221, and the fourthinsulative body 62 forms an upward/top face 621 horizontally coplanar with theupward face 231. Furthermore, the firstinsulative body 32 forms a forward chamferedstructure 32a directly and intimately downwardly facing thecard receiving space 201; thehousing 20 forms a rearwardchamfered structure 22a, opposite to the forward chamferedstructure 32a in the front-to-back direction, directly and intimately downwardly facing thecard receiving space 201 too. Similarly, the fourthinsulative body 62 forms a forward chamferedstructure 62a directly and intimately upwardly facing thecard receiving space 201; thehousing 20 forms a rearwardchamfered structure 23a, opposite to the forward chamferedstructure 62a in the front-to-back direction, directly and intimately upwardly facing thecard receiving space 201 too.

The firstinsulative body32 defines a number offirst slits320 on top face for exposing the firsthorizontal sections311 in air. Thefirst position part33 defines a number offirst openings330 on rear face for exposing the firstvertical sections312 in air. The secondinsulative body42 defines a number ofsecond slits420 on top face for exposing the secondhorizontal sections411 in air. Thesecond position parts43 defines a number ofsecond openings430 on rear face for exposing the secondvertical sections412 in air. The thirdinsulative body52 defines a number ofthird slits520 on bottom face for exposing the thirdhorizontal sections511 in air. Thethird position parts53 defines a number ofthird openings530 on rear face for exposing the thirdvertical sections512 in air. The fourthinsulative body62 defines a number offourth slits620 on bottom face for exposing the fourthhorizontal sections611 in air.

Referring toFIGS.13-16, when the first, second, third, fourthterminal modules30,40,50,60 are mounted on theinsulative housing20, thefirst soldering portions313 are at finial side near to the rear face of theinsulative housing20. At the same time, thesecond soldering portion413 is in front of thefirst soldering portion313, thethird soldering portion513 is in front of thesecond soldering portion413, and thefourth soldering portion613 is in front of thethird soldering portion513. The row offirst soldering portions313 align with the row ofsecond soldering portions413 along a front-to-back direction. The row ofthird soldering portions513 align with the row offourth soldering portions613 along a front-to-back direction. Thesecond soldering portion413 aligns to a space of two adjacentthird soldering portions513. The row offirst terminals31 align with the row ofsecond terminals41 along an up-to-down direction, the row ofthird terminals51 align with the row offourth terminals61 along an up-to-down direction. Thefirst terminals31 and thesecond terminals41 are offset in a longitudinal direction perpendicular to the up-to-down direction and the front-to-back direction from thethird terminals51 and thefourth terminals61. A center line of thefirst terminal31 along a front-to-back direction and a center line of thesecond terminal41 along a front-to-back direction are in a same first vertical plane C-C, and a center line of thethird terminal51 along a front-to-back direction and a center line of thefourth terminal61 along a front-to-back direction are in a same second vertical plane D-D. A distance of adjacent the first vertical plane C-C and the second vertical plane D-D is 0.4 mm. This design of the QSFP-DD makes high-frequency performance of the wholeelectrical receptacle200 to be better.

Referring toFIGS.17(A)-25(B), a second embodiment of theelectrical receptacle700, which is essentially similar to theelectrical receptacle200 in the first embodiment except that a metallic shielding plate is disposed between the first terminal module and the second terminal module with the corresponding first sprint tangs and second spring tangs extending therefrom to contact the corresponding first terminals and second terminals, respectively, for grounding, and similarly another metallic shielding plate is disposed between the third terminal module and the fourth terminal module in the same way. The details are illustrated below.

Theelectrical receptacle700 includes aninsulative housing702 forming a frontcard receiving space704 and a rearmodule receiving space706. Theinsulative housing702 defines acard receiving space704, with a plurality ofupper passageways708 above thecard receiving space704, and a plurality oflower passageways710 below thecard receiving space704. Aterminal module712 is disposed in themodule receiving space706 and includes anupper half module714 and alower half module734 stacked with each other in the vertical direction. Theupper half module714 includes an upperfront part716 having a plurality of upperfront terminals718 integrally formed with an upperfront insulator720 via an insert-molding process, and an upperrear part722 having a plurality of upperrear terminals724 integrally formed with an upperrear insulator726 via another insert-molding process, and further with a metallicupper shielding plate728 sandwiched between the upperfront insulator720 and the upperrear insulator726 in the vertical direction, wherein theupper shielding plate728 includes a plurality of upper spring tangs730 extending upwardly throughcorresponding holes721 in the upperfront insulator720 to mechanically and electrically connect to the corresponding selected grounding terminals of the upperfront terminals718, and a plurality oflower spring tangs732 extending downwardly throughcorresponding holes727 of the upperrear insulator726 to mechanically and electrically connect to the corresponding selected grounding terminals of the upperrear terminals724. Notably, during mating thefront contacting section717 of the upperfront terminals718 extend into the correspondingupper passageways708 while the front contactingsection723 of the upperrear terminal724 extend into the correspondingupper grooves719 formed in the upperfront insulator720.

Similarly, thelower half module734 includes alower front piece736 having a plurality of lowerfront terminals738 integrally formed with a lowerfront insulator740 via an insert-molding process, and a lowerrear piece742 having a plurality of lowerrear terminals744 integrally formed with a lowerrear insulator746 via another insert-molding process, and further with a metalliclower shielding plate748 sandwiched between the lowerfront insulator740 and the lowerrear insulator746 in the vertical direction wherein thelower shielding plate748 includes a plurality oflower spring fingers750 extending downwardly through the correspondingholes741 in the lowerfront insulator740 to mechanically and electrically connect to the corresponding selected grounding terminals of the lowerfront terminals738, and a plurality ofupper spring fingers752 extending upwardly through the correspondingholes747 of the lowerrear insulator746 to mechanically and electrically connect to the corresponding selected grounding terminals of the lowerrear terminals744. Notably, during mating thefront contacting section737 of the lowerfront terminals738 extend into the correspondinglower passageways710 while the front contactingsection743 of the upper lowerrear terminal744 extend into the correspondinglower grooves739 formed in the lowerfront insulator740.

Notably, each of theupper shielding plate728 and thelower shielding plate748 forms theopening729,749 corresponding to the corresponding high speed terminals in the vertical direction for reduction of resonance. Understandably, the layout of the upperfront terminals718 and the upperrear terminals724, and the lowerfront terminals738 and the lowerrear terminals744 are arranged same with those in the first embodiment. The posts-holes structure may be applied to the insulators and shielding plate so as to have the shielding plate retained between the stacked insulator without relative movement both vertically and horizontally. Similar to the first embodiment, in this embodiment the terminals of the same part/piece of the module is equipped with aninsulative spacer760 to secure the tails of the terminals in position without relative movements, and two opposite ends of thespacer760 is retained in the correspondingslots703 in an interior surfaces of thehousing702. It is also noted that because the terminals are molded within the corresponding part/piece of the module, theholes721,727,741 and747 extend through at least one corresponding surface of the insulator of the corresponding part/piece in at least one vertical direction. It is also noted that means for securing theterminal module712 and thehousing702, e.g., protrusions vs. steps, may be applied thereon optimally. Similar to the first embodiment, even though a rear card received slot orspace766 is formed between the upperfront insulator720 and the lowerfront insulator740 in the vertical direction and communicatively aligned with the frontcard receiving space 704 in the front-to-back direction to commonly form a full card receiving space, in this embodiments, a pair ofslots705 are optimally formed in opposite interior surfaces of thehousing702 to additionally hold two opposite lateral side edges of the inserted mating tongue, i.e., the printed circuit board of the plug connector, during mating. Similar to what is disclosed in the first embodiment, thehousing 702 forms adownward face 702a and an upward face 702b by two sides of the frontcard receiving space 704 in the vertical direction. The upperfront insulator 720 includes a downward/bottom face 720a directly and intimately downwardly facing the rearcard receiving slot 766 and being horizontally coplanar with thedownward face 702a, and the lowerfront insulator 740 forms an upward/top face 740a directly and intimately upwardly facing the rearcard receiving slot 766 and being horizontally coplanar with theupward face 704b. Furthermore, the upperfront insulator 720 forms aforward chamfered structure 7201 directly and intimately downwardly facing the rearcard receiving space 766, and the lowerfront insulator 740 forms aforward chamfered structure 7401 directly and intimately upwardly facing the rearcard receiving space 766. In addition, as shown in FIGS. 25(A) and 25(B), when no plug connector is mated, thefront contacting section 723 downwardly abuts against the upperfront insulator 720, and the front contactingsection 743 upwardly abuts against the lowerfront insulator 740.

Referring toFIGS.26(A) to31, anelectrical connector assembly800 belonging to the QSFP-DD specification, includes aplug connector830, anelectrical receptacle850, ametallic cage810 with thecorresponding retainer880, theheat sink870 and thelight pipe890 thereon, wherein theelectrical receptacle850 is essentially same with theelectrical receptacle200 in the first embodiment. Theplug connector830 includes ametallic base831, ametallic cover832 commonly forming a cavity to receive apaddle card834 therein. Acable836 includes a plurality ofwires838 soldered upon thepaddle card834. Anactuator840 is moveable along a front-to-back direction for releasing the plug connector from thecage810 so as to un-mate theplug connector830 from theelectrical receptacle850.

It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set fourth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the members in which the appended claims are expressed.

Claims (24)

What is claimed is:

1. An electrical receptacle for being mounted for mounting onto a host board and electrically connecting with a mating electrical circuit board along a front-to-back direction, comprising:

an insulative housing; and

a row of first terminals, a row of second terminals, a row of third terminals, and a row of fourth terminals arranged along a vertical direction and mounted in the insulative housing, the first terminals and the fourth terminals forming a first mating port, the second terminals and the third terminals forming a second mating port, the first mating port forwardly extending beyond the second mating port;

wherein the row of first terminals align with the row of second terminals along an up-to-down direction, the row of third terminals align with the row of fourth terminals along the up-to-down direction, the first terminals and the second terminals are offset from the third and fourth terminals in a longitudinal direction transverse direction perpendicular to the vertical direction and the front-to-back direction from the third terminals and the fourth terminals; and wherein

each of the first terminals has a first contact section, a first soldering portion, and a first body portion integrally connected between the first contact section and the first soldering portion, each of the second terminals has a second contact section, a second soldering portion, and a second body portion integrally connected between the second contact section and the second soldering portion, each of the third terminals has a third contact section, a third soldering portion, and a third body portion integrally connected between the third contact section and the third soldering portion, and each of the fourth terminals has a fourth contact section, a fourth soldering portion, and a fourth body portion integrally connected between the fourth contact section and the fourth soldering portion; wherein

the row of first terminals are insert-molded in a first insulative body to form a first terminal module, the row of second terminals are insert-molded in a second insulative body to form a second terminal module, the row of third terminals are insert-molded in a third insulative body to form a third terminal module, and the row of fourth terminals are insert-molded in a fourth insulative body to form a fourth terminal module; and wherein

the first insulative body has a plurality of guide grooves in a bottom surface thereof to respectively receive the second contact sections of the corresponding second contacts, and the fourth insulative body has a plurality of guide grooves in a top surface thereof to respectively receive the third contact sections of the corresponding third contacts.

2. The electrical receptacle as claimed inclaim 1, wherein a center line of the first terminal along the front-to-back direction and a center line of the second terminal along the front-to-back direction are in a same first vertical plane, a center line of the third terminal along the front-to-back direction and a center line of the fourth terminal along the front-to-back direction are in a same second vertical plane.

3. The electrical receptacle as claimed inclaim 2, wherein a distance of adjacent first vertical plane and second vertical plane is 0.4 mm.

4. The electrical receptacle as claimed inclaim 1, wherein the first terminal has a first soldering portion; the second terminal has a second soldering portion; the third terminal has a third soldering portion; the fourth terminal has a fourth soldering portion; the fourth soldering portion, the third soldering portion, the second soldering portion and the first soldering portion are respectively arranged in front to back the front-to-back direction.

5. The electrical receptacle as claimed inclaim 4, wherein the second soldering portion aligns to a space of with a space between two adjacent third soldering portions.

6. The electrical receptacle as claimed inclaim 1, wherein the first terminal terminals are further insert-molded in a first insulative body and a first position part forms a first terminal module; the second terminal terminals are further insert-molded in a second insulative body and a second position part forms a second terminal module; the third terminal terminals are further insert-molded in a third insulative body and a third position part forms a third terminal module; the fourth terminal insert-molded in a fourth insulative body forms a fourth terminal module.

7. The electrical receptacle as claimed inclaim 6, wherein the first terminal body portion has a first contact section, a first horizontal section and a first vertical section, the first insulative body over-molding on the first horizontal section, the first position part over-molding on the first vertical section; the second terminal body portion has a second contact section, a second horizontal section and a second vertical section, the second insulative body over-molding on the second horizontal section, the second position part over-molding on the second vertical section; the third terminal body portion has a third contact section, a third horizontal section and a third vertical section, the third insulative body over-molding on the third horizontal section, the third position part over-molding on the third vertical section; the fourth terminal body portion has a fourth contact section, a fourth horizontal section and a fourth vertical section, the fourth insulative body over-molding on the fourth horizontal section; the insulative housing has a row of fixed slots, the fourth vertical section received in the fixed slot and each fourth vertical section is received in a respective one of the fixed slots.

8. The electrical receptacle as claimed inclaim 7, wherein the insulative housing has a top face and a bottom face, the top face defined defines a first guide groove for receiving the first contact section, and the bottom face defined defines a fourth guide groove for receiving the fourth contact section.

9. The electrical receptacle as claimed inclaim 6, wherein the first insulative body is defined a guide groove on a bottom surface thereof for receiving a contact section of the second terminal, and the fourth insulative body is defined a guide groove on a top surface thereof for receiving a contact section of the third terminal.

10. The electrical receptacle as claimed inclaim 7, wherein the first insulative body is defined defines a first slit for exposing the first horizontal section, the first position part is defined defines a first opening for exposing the first vertical section; and the second insulative body is defined defines a second slit for exposing the second horizontal section, the second position part is defined defines a second opening for exposing the second vertical section; and the third insulative body is defined defines a third slit for exposing the third horizontal section, the third position part is defined defines a third opening for exposing the third vertical section; and the fourth insulative body is defined defines a fourth slit for exposing the fourth horizontal section.

11. An electrical receptacle for mating with a plug connector, comprising:

an insulative housing defining a front card receiving space and a rear module receiving space;

a terminal module received within the module receiving space and comprising:

an upper half module and a lower half module stacked with each other in a vertical direction;

said upper half module including an upper front part and an upper rear part cooperating with each other so as to sandwich an upper shielding plate therebetween in the vertical direction, the upper front part including a plurality of upper front terminals integrally formed with an upper front insulator via insert-molding, the upper rear part including a plurality of upper rear terminals integrally formed with an upper rear insulator via insert-molding, said upper shielding plate forming a plurality of upper springs extending upwardly through corresponding holes in the upper front insulator to mechanically and electrically connect corresponding upper front terminals for grounding, and a plurality of lower springs extending downwardly through corresponding holes to mechanically and electrically connect corresponding upper rear terminals for grounding; wherein

front contacting sections of the upper front terminals and those of the upper rear terminals are located on a same upper side of with respect to the front card receiving space; and

the lower half module includes a plurality of lower front terminals and a plurality of lower rear terminals, and front contacting sections of the lower front terminals and those of the lower rear terminals are located on a same lower side of with respect to the front card receiving space.

12. The electrical receptacle as claimed inclaim 11, wherein during mating with a plug connector, the front contacting sections of the upper front terminals are received within corresponding upper passageways formed by an upper wall of the housing while the front contacting sections of the upper rear terminals are received within corresponding upper grooves formed in the upper front insulator.

13. The electrical receptacle as claimed inclaim 11, wherein the front contacting sections of the upper front terminals are located in front of and aligned with those of the upper rear terminals in a front-to-back direction perpendicular to said vertical direction.

14. The electrical receptacle as claimed inclaim 11, wherein the upper half module and the lower half module commonly forms form a rear card receiving space aligned with the front card receiving space in the front-to-back direction.

15. The electrical receptacle as claimed inclaim 14, wherein said rear card receiving space is confined by the upper front insulator.

16. The electrical receptacle connector as claimed inclaim 14, wherein two opposite lateral interior surfaces of the housing define a pair of grooves for holding two opposite lateral side edges of a mating tongue of the plug connector.

17. An electrical receptacle mounted onto for mounting a host board and electrically connecting with a mating electrical circuit board, comprising:

an insulative housing; and

a row of first terminals, a row of second terminals, a row of third terminals, and a row of fourth terminals arranged along a vertical direction and mounted in the insulative housing, the first terminals and the fourth terminals forming a first mating port, the second terminals and the third terminals forming a second mating port, the first mating port forwardly extending beyond the second mating port;

wherein

the row of first terminals align with the row of second terminals along an up-to-down direction, the row of third terminals align with the row of fourth terminals along the up-to-down direction, the first terminals and the second terminals are offset in a longitudinal transverse direction from the third terminals and the fourth terminals; wherein

the first terminal is terminals are insert-molded with a first insulative body and a first position part to form a first terminal module, the second terminal is terminals are insert-molded with a second insulative body and a second position part to form a second terminal module, the third terminal is terminals are insert-molded with a third insulative body and a third position part to form a third terminal module, and the fourth terminal is terminals are insert-molded with a fourth insulative body to form a fourth terminal module; wherein

theeach first terminal has unitarily a first contact section, a first horizontal section, and a first vertical section, the first insulative body over-molding on the first horizontal section, the first position part over-molding on the first vertical section, theeach second terminal has unitarily a second contact section, a second horizontal section, and a second vertical section, the second insulative body over-molding on the second horizontal section, the second position part over-molding on the second vertical section, theeach third terminal has unitarily a third contact section, a third horizontal section, and a third vertical section, the third insulative body over-molding on the third horizontal section, the third position part over-molding on the third vertical section, theeach fourth terminal has unitarily a fourth contact section, a fourth horizontal section, and a fourth vertical section, the fourth insulative body over-molding on the fourth horizontal section, and the insulative housing has a row of fixed slots, the fourth vertical section received in the fixed slotand each fourth vertical section is received in a respective one of the fixed slots; and

the first insulative body has a guide groove on a bottom surface thereof for receiving one of the second contact section sections, and the fourth insulative body has a guide groove on a top surface thereof for receiving one of the third contact section.

18. An electrical receptacle for mating with a plug connector having a paddle card, comprising:

an insulative housing defining a front card receiving space and a rear module receiving space in a front-to-back direction;

a terminal module received within the module receiving space and comprising:

an upper half module and a lower half module stacked with each other in a vertical direction perpendicular to the front-to-back direction;

said upper half module including an upper front part and an upper rear part stacked with each other in the vertical direction, the upper front part including a plurality of upper front terminals integrally formed with an upper front insulator via insert-molding, the upper rear part including a plurality of upper rear terminals integrally formed with an upper rear insulator via insert-molding;

the lower half module including a lower front part and a lower rear part stacked with each other in the vertical direction, the lower front part including a plurality of lower front terminals integrally formed with a lower front insulator via insert-molding, the lower rear part including a plurality of lower rear terminals integrally formed with a lower rear insulator via insert-molding;

a rear card receiving space formed between the upper front insulator and the lower front insulator in the vertical direction so as to cooperate with the front card receiving space to form a full card receiving space for receiving the paddle card of the plug connector;

front contacting sections of the upper front terminals and those of the upper rear terminals being located on a same upper side of the full card receiving space;

front contacting sections of the lower front terminals and those of the lower rear terminals being located on a same lower side of the full card receiving space;

a bottom face of the upper front insulator downwardly facing toward the rear card receiving space, and a top face of the lower front insulator upwardly facing toward the rear card receiving space; wherein

the housing includes a downward face and an upward face, the downward face downwardly faces the front card receiving space, the downward face is horizontally coplanar with the bottom face of the upper front insulator, the upward face upwardly faces the front card receiving space, and the upward face is horizontally coplanar with the top face of the lower front insulator.

19. The electrical receptacle as claimed in claim 18, wherein the upper front terminals and the upper rear terminals are aligned with each other in the front-to-back direction, respectively, and the lower front terminals and the lower rear terminals are aligned with each other in the front-to-back direction, respectively, while being offset from the corresponding upper front terminals and upper rear terminals in a transverse direction perpendicular to both the front-to-back direction and the vertical direction.

20. The electrical receptacle as claimed in claim 19, wherein each of the upper front terminals, the upper rear terminals, the lower front terminals and the lower rear terminals includes a unitary front contacting section, rear mounting section and right angle shaped body section therebetween.

21. The electrical receptacle as claimed in claim 18, wherein a front end face of the upper front insulator forms a chamfered structure downwardly facing the full card receiving space, and a front face of the lower front insulator forms an upward chamfered structure upwardly facing the full card receiving space.

22. The electrical receptacle as claimed in claim 18, wherein the front contacting section of each upper rear terminal abuts against the upper front insulator, and the front contacting section of each lower rear terminal abuts against the lower front insulator.

23. The electrical receptacle as claimed in claim 18, wherein the upper front insulator forms a plurality of guide grooves to receive the front contacting sections of the corresponding upper rear terminals, respectively, and the lower front insulator forms a plurality of guide grooves to receive the front contacting sections of the corresponding lower rear terminals, respectively.

24. The electrical receptacle as claimed in claim 18, wherein the housing forms a pair of slots in two opposite lateral interior surfaces of two sides of the terminal module for holding the paddle card of the plug connector during mating.

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