TW201407903A - Shieldless, high-speed, low-cross-talk electrical connector - Google Patents

Abstract

An electrical connector may include a first connector with electrically-conductive contacts. The contacts may have blade-shaped mating ends, and may be arranged in a centerline. The electrical connector may include a second connector with electrically-conductive receptacle contacts, which may also be arranged in a centerline. The connectors may be mated such that the mating portion of a first contact in the second connector may physically contact of a corresponding blade-shaped mating end of a contact in the first connector.

Description

Unshielded high speed low crosstalk electrical connector

The electrical connector provides a signal connection between the electronic devices that use the conductive contacts. In a particular application, an electrical connector provides a connectable interface between one or more substrates (e.g., printed circuit boards). The electrical connector can include a header connector disposed on the first substrate and a complementary receptacle connector disposed on the second substrate. In general, the first plurality of contacts in the header connector are adapted to match a corresponding plurality of contacts in the receptacle connector.

As the signal density increases, the electrical signal interference between the differential signal pairs of the electrical contacts increases, especially in electrical connectors that lack metal crosstalk shielding. The reason why the signal density is very important is that the germanium wafer is subjected to thermal confinement when the pulse velocity is increased. Despite the limitations of germanium-based wafers, one way to achieve greater signal processing is to simultaneously operate several wafers and their individual transmission paths in parallel. This solution requires the use of a larger backplane, midplane, and daughter card space that is assigned to the electrical connector.

Therefore, there is a need for a quadrature differential signal electrical connector with balanced mating features that occupies only a minimum amount of substrate space while at the same time having a worst of six percent or less without metal crosstalk shielding. The multi-active crosstalk operates above four billion bits per second (Gigabit/sec).

An electrical connector can include: a plurality of portions that are at least partially consistently disposed along a common centerline An electrically isolated electrical contact in which adjacent, staggered contacts are deflected in opposite directions by a corresponding blade contact of a mating connector. An electrical connector may further include: a plurality of electrically isolated electrical contacts disposed at least partially consistently along a common centerline, wherein at least two of the plurality of electrically isolated electrical contacts each define a mating end, It is deflected in a first direction transverse to the common centerline by a corresponding blade contact of a mating connector. At least one of the plurality of electrically isolated electrical contacts is adjacent to the at least one of the plurality of electrically isolated electrical contacts and defines a different mating end by which the A corresponding blade contact of the connector is biased transversely to the common centerline and deflected in a second direction opposite the first direction. At least one of the plurality of electrically isolated electrical contacts can include two adjacent electrically isolated electrical contacts. At least two of the plurality of electrically isolated electrical contacts may be adjacent to one another and the at least two of the plurality of electrically isolated electrical contacts may each be deflected in a first direction. The at least one of the plurality of electrically isolated electrical contacts can include two adjacent electrically isolated electrical contacts. The at least two of the plurality of electrically isolated electrical contacts can include at least three electrically isolated electrical contacts that are adjacent to one another and each define a mating end that is corresponding to a mating connector The blade contact is deflected in a first direction transverse to the common centerline. The at least one of the plurality of electrically isolated electrical contacts can also include three adjacent electrically isolated electrical contacts. The at least two of the plurality of electrically isolated electrical contacts can include at least four electrically isolated electrical contacts that are adjacent to one another and each define a mating end that is corresponding to a mating connector The blade contact is deflected in a first direction transverse to the common centerline. The at least one of the plurality of electrically isolated electrical contacts can include four adjacent electrically isolated electrical contacts.

An electrical connector may also include an array of electrical contacts in which adjacent electrical contacts are paired into differential signal pairs along individual centerlines. The differential signal pairs can be separated from one another along the individual centerlines by a ground contact, wherein the electrical connector does not have a metal plate and the card edge of each inch includes more than eighty or more differential signals For example, one of the eight or more differential signal pairs is a victim differential signal pair, and the eight positive differential signals closest to the pair of the victim differential signals have a rise time of 70 picoseconds. Differential letter The number produces a worst multi-active crosstalk of no more than six percent of the pair of victim differential signals. The adjacent electrical contacts defining a differential signal pair are separated by a first distance, and the differential signal pair is separated from the ground contact by a second distance greater than the first distance. The second distance may be greater than about 1.5 times the first distance, about 2 times greater than the first distance, or about 2 times greater than the first distance. Each of the electrical contacts in the array of electrical contacts can include a socket mating portion. The socket mating portions of the array of electrical contacts can be constrained to a fictitious perimeter of about 400 square millimeters or less. Each of the electrical contacts can include a socket compliant portion and the socket compliant portions of the array of electrical contacts can be constrained within a fictitious perimeter of about 400 square millimeters or less. The electrical contact may extend no more than 20 mm from the placement surface of a substrate. A spacing may be defined between each of the centerlines of the contacts disposed in the first direction. The spacing between each of the centerlines can be from about 1.2 mm to 1.8 mm.

An electrical contact can include a first electrical contact and a second electrical contact positioned at least partially along the first centerline. The first electrical contact may be adjacent to the second electrical contact, wherein the first electrical contact defines a tail end that is staggered in the first direction away from the first center line. The second electrical contact defines a tail end that is staggered in a second direction opposite the first direction. A third electrical contact and a fourth electrical contact are positionable at least partially along a second centerline adjacent the first centerline. The third electrical contact may be adjacent to the fourth electrical contact, wherein the third electrical contact defines a tail end that is staggered in the second direction; and the fourth electrical contact Defining a trailing end that is staggered in the first direction. The orientation of the first electrical contact and the tail end of the second electrical contact may be a mirror image of the third electrical contact and the tail end of the fourth electrical contact. The first electrical contact and the second electrical contact form a differential signal pair, and the third electrical contact and the fourth electrical contact form a differential signal pair. The electrical contact may further include a ground contact adjacent the second electrical contact along the first centerline.

A substrate can be positioned at least partially along a first electrical channel and a second electrical channel at the first centerline. The first electrical channel can be adjacent to the second electrical channel. The first electrical channel system The staggered arrangement is away from the first center line in the first direction, and the second electric path is staggered in a second direction opposite to the first direction. A third electrical channel and a fourth electrical channel can be positioned at least partially along a second centerline adjacent the first centerline. The third electrical channel can be adjacent to the fourth electrical channel. The third electrical channels may be staggered in the second direction, and the fourth electrical channels may be staggered in the first direction. The orientation of the first electrical channel and the second electrical channel is preferably a mirror image of the third electrical channel and the fourth electrical channel.

An electrical connector can include: a differential signal pair including a first electrical contact secured in a dielectric housing and a fixed adjacent to the first signal contact in the housing a second electrical contact, wherein the first electrical contact has a first length in the first direction, and the second signal contact has a second length in the first direction, the first length being less than the second length, And a second length of the electrical signal propagated through the second length of the second signal contact is longer than a first length through which the electrical signal in the first signal contact propagates to correct a mating from a mating right angle connector The skew of the differential signal pair.

1‧‧‧Electrical contacts

1A‧‧‧Electrical contacts

2‧‧‧Electrical contacts

2A‧‧‧Electrical contacts

3‧‧‧Electrical contacts

3A‧‧‧Electrical contacts

4‧‧‧Electrical contacts

4A‧‧‧Electrical contacts

5‧‧‧ Socket compliant part of the tail

6‧‧‧ Socket compliant part of the tail

7‧‧‧ Socket compliant part of the tail

8‧‧‧ Socket compliant part of the tail

105‧‧‧Substrate

110‧‧‧Electrical connector

110A‧‧‧Electrical connector

120‧‧‧ head connector

130‧‧‧Electrical contacts

135‧‧‧ head lead section

140‧‧‧ head seat compliance

150‧‧‧ head joints

205‧‧‧Substrate

210‧‧‧Electrical connector

220‧‧‧Insert molded lead frame fittings

220A‧‧‧Insert molded lead frame fittings

220B‧‧‧Insert molded lead frame fittings

220C‧‧‧Insert molded lead frame fittings

230‧‧‧Insert molded lead frame assembly organizer

240‧‧‧Socket housing

240A‧‧‧Socket housing

250‧‧‧right angle electrical contacts

255‧‧‧ lead part

260‧‧‧ socket compliant part

265‧‧‧ head seat obedience part tail section

270‧‧‧ socket adapter

275‧‧‧Differential signal pair

280‧‧‧ Adapter

285‧‧‧Differential signal pair

290‧‧‧ lead part

295‧‧‧Differential signal pair

310‧‧‧Dielectric materials

320‧‧‧Protruding

330‧‧‧Tits

340‧‧‧

350‧‧‧ Dielectric material top surface

360‧‧‧With matching window

370‧‧‧Matching cavity

380‧‧‧ cavity

390‧‧‧ wall

400‧‧‧Latch

410‧‧‧Bend section

420‧‧‧Differential signal pair

430‧‧‧Signal contacts

440‧‧‧Signal contacts

450‧‧‧ Grounding contacts

470‧‧‧Electrical contacts

480‧‧‧Insert molded casing

490‧‧‧Electrical contacts

500‧‧‧Electrical contacts

A‧‧‧Differential signal pair

CLA‧‧ midline

CLB‧‧‧ midline

CL1‧‧‧ midline

CL2‧‧‧ midline

CL3‧‧‧ midline

CL4‧‧‧ midline

G‧‧‧ Grounding contacts

S+‧‧‧Differential signal pair

S-‧‧‧Differential signal pair

V‧‧‧Differential signal pair

1A and 1B depict a vertical header connector and a right angle receptacle connector.

Figure 1C depicts a right angle socket housing that houses a socket insert molded leadframe assembly (IMLA) with six differential signal pairs and associated ground contacts for each centerline.

Figure 1D depicts a vertical header connector with six differential signal pairs and associated ground contacts for each centerline.

Figure 2 depicts a vertical header connector and a right angle receptacle connector that are placed on individual substrates.

Figure 3 depicts a pitch connector footprint and electrical contacts positioned above the right angle coverage.

4A and 4B are front and isometric views, respectively, of a right angle receptacle connector having a socket housing.

5A and 5B are front and isometric views, respectively, of a right angle receptacle connector without a socket housing.

6A and 6B are top and side views, respectively, of the four differential signal pair IMLA of the right angle socket connector.

7A and 7B are front and isometric views, respectively, of a socket housing.

Figures 8A and 8B depict an IMLA housed in a socket housing.

Figure 9 is a side elevational view of the mated electrical connector depicted in Figures 1A and 1B.

10A and 10B depict an electrical contact array mated to a first embodiment socket IMLA.

11A and 11B depict an electrical contact array mated to a second embodiment socket IMLA.

Figures 12A and 12B depict an electrical contact array mated to a third embodiment socket IMLA.

13A and 13B show an electrical contact array of a socket IMLA of a fourth embodiment.

Figure 14 depicts the mated right angle socket IMLA with the plastic dielectric material removed.

Figure 15 is a detailed view of a portion of the right angle socket IMLA of Figure 14.

Figure 16 depicts a headstock IMLA and a right angle socket IMLA.

Figure 17 depicts an electrical contact array for mating a plurality of right angle electrical contacts.

1A and 1B depict a first electrical connector 110 and a second electrical connector 210. As shown, the first electrical connector 110 can be a vertical header connector. That is, the first electrical connector 110 can define mating and seating areas that are parallel to each other. The second electrical connector 210 can be a right angle connector or some other suitable mating connector of the first electrical connector 110. That is, the second electrical connector 210 can define mating and seating areas that are perpendicular to each other. Although the specific embodiment described herein shows a vertical header connector and a right angle socket Connector, it should be understood that any of the first electrical connector 110 or the second electrical connector 210 can be a vertical connector or a right angle connector, the first electrical connector 110 or the first Any one of the two electrical connectors 210 can be a header connector or a socket connector, and both the first electrical connector 110 and the second electrical connector 210 can be a mezzanine connector. .

The first electrical connector 110 and the second electrical connector 210 can be unshielded high-speed electrical connectors, that is, operating at a data transmission rate of four billion bits per second or more (usually between 6.25 and 12.5) An electrical connector that does not have a metal crosstalk board, either one or a billion bits per second (approximately 80 to 35 picoseconds rise time), which is the worst acceptable multi-active on a sacrificial pair Crosstalk is no more than six percent. The worst multiple active crosstalk can be determined by the sum of the absolute values of the six or eight positive differential signal pairs (Fig. 3) closest to the victim differential signal pair. Rise Time 0.35/bandwidth, where the bandwidth is approximately equal to half of the data transmission rate. Each differential signal pair may have a differential impedance of about 85 to 100 ohms plus or minus ten percent. For example, the differential impedance can match the impedance of a system (e.g., a printed circuit board or integrated circuit) to which the connectors can be attached. The connectors 110 and 210 may have an insertion loss of about -1 dB or less at operating frequencies up to about five billion hertz, and may have about -2 dB or less at operating frequencies up to about one hundred million Hz. Insertion loss.

Referring now to FIGS. 1A and 1B, the first electrical connector 110 can include a header connector 120 carrying electrical contacts 130. The electrical contacts 130 include a header mating portion 150 and a header compliant portion 140. Each of the header adapters 150 can define an otherwise first wide side and an individual second wide side opposite the first wide side. The head compliant portion 140 can be used to press the tail portion, the surface to place the tail portion, or a fusible element (such as a solder ball). The electrical contacts 130 can be insert molded prior to attachment to the header housing 120 or prior to being secured to the header housing 120. Each of the electrical contacts 130 may have a material thickness that is approximately equal to its individual height, although the height may also be greater than the thickness of the material. for example, The electrical contacts 130 may have a material thickness of between about 0.1 mm and 0.45 mm and a joint height of between about 0.1 mm and 0.9 mm. In the edge coupling configuration along the center line CL1, adjacent electrical contacts 130 for defining a differential signal pair may be equally spaced or unevenly spaced from an adjacent ground contact. For example, the interval between a first differential signal contact and a second adjacent differential signal contact may be greater than the interval between the second differential signal contact and an adjacent ground contact. It is about 1.2 to 4 times smaller. As shown in FIG. 1D, a uniform X-direction centerline pitch CL1, CL2, CL3 of about 1 mm to 2 mm is required; and a Y-direction centerline pitch CLA, CLB of about 1 mm to 1.5 mm is required, however, Preferably, it is 1.2 mm, 1.3 mm, or 1.4 mm. The spacing between adjacent electrical contacts 130 may correspond to a dielectric material between the electrical contacts 130. For example, when the dielectric material is air, the electrical contacts 130 may be closer to each other than when the dielectric material is plastic.

With continued reference to FIGS. 1A and 1B, the second electrical connector 210 includes a plurality of insert molded leadframe assemblies (IMLA) 220 that are carried by a receptacle housing 240. Each IMLA 220 carries a plurality of electrical contacts, such as a right angle electrical contact 250. Any suitable dielectric material, such as air or plastic, can be used to isolate the right angle electrical contacts 250 from one another. The right angle electrical contacts 250 include a socket mating portion 270 and a socket compliant portion 260. The socket compliant portions 260 may be identical to the header compliant portions 140 and may include a press tail portion, a surface seating tail portion, or a fusible element (eg, a solder ball). The right angle electrical contacts 250 may have a material thickness of from about 0.1 mm to about 0.5 mm and a joint height of from about 0.1 mm to about 0.9 mm. The height of the contacts may be different over the entire length of the right angle electrical contacts 250. Therefore, the height of the mating ends 280 of the right angle electrical contacts 250 is about 0.9 mm, and an adjacent lead portion 255 (Fig. 14) ) will narrow to a height of about 0.2 mm. In general, the height of the mating end 280 and the height of the lead portion 255 (FIG. 14) may be about five. The second electrical connector 210 may also include an IMLA organizer 230 that may be electrically or electrically conductive. A conductive IMLA organizer 230 can be electrically connected to the conductive portions of the IMLAs 220 via slots 280 defined in the IMLA organizer 230 or any other suitable connection.

The first and second electrical connectors 110, 210 of Figures 1A and 1B can include four differential signal pairs and staggered ground contacts positioned edge-to-edge along the centerline CL1. However, there may be any number of differential signal pairs extending along the centerline CL1. For example, there may be two, three, four, five, six, or more differential signal pairs that may or may not have staggered ground contacts. A differential signal pair positioned along a centerline adjacent to the centerline CL1 can be offset from a differential signal pair positioned along a centerline CL2. Referring now to FIG. 1A, when the second electrical connector 210 includes an IMLA 220 having eighteen right angle electrical contacts 250, the second electrical connector 210 has a depth D that is less than 46 mm, preferably about 35 mm.

1C depicts a receptacle housing 240A that is configured to receive twelve IMLAs 220 (FIGS. 6A, 6B), each having six differential pairs and along a common individual centerline CL1, CL2. , CL3 Interleaved ground contacts that are positioned edge-to-edge. It is about eighteen right angle electrical contacts for each IMLA, with six right angle electrical contacts being individually positioned/interleaved between the ground dedicated differential signal pairs. In this embodiment, the differential signal pairs of each IMLA and the interleaved ground contacts extend along the individual centerlines CL1, CL2, CL3, etc. in the Y direction and the centerlines CL1, CL2, CL3 are at X The directions will be separated. When the IMLAs are attached to the socket header 240A, all socket mating portions 270 (FIG. 1A) occupying an X by Y area define a socket mating area. The midline spacing between the differential pairs on the centerlines CL1, CL2, and CL3 can be from about 1 mm to 4 mm, preferably between 1.5 mm or 1.8 mm.

With continued reference to FIG. 1C, the socket mating area of the second electrical connector 210 configuring twelve IMLAs 220 (each comprising six differential pairs and interleaved ground contacts positioned in an edge-to-edge manner) is at X. The length in the direction is about 20 mm to 25 mm and the length in the Y direction is about 20 mm to 27 mm. For example, a 20 mm by 20 mm socket mating area in the present embodiment would include approximately two hundred and sixteen individual socket mating portions that can be paired into approximately seventy-two differential signal pairs. The number of differential signal pairs per inch in the edge of the card (measured in the X direction) when the pair of differential signals are on the center line CL1, CL2, CL3 of 1.8 mm It may be about eighty-four to eighty-five (more than eighty-two); and when the differential signal is on the centerline CL1, CL2, and CL3 of 1.5 mm, it is about 101 to 102. One. Regardless of the midline spacing or the total number of IMLAs being increased or omitted, the height or Y-direction length and depth D (Fig. 1A) are preferably maintained constant.

1D shows a first electrical connector 110A having a plurality of electrical contacts 130 that are configured on each of the neutral lines CL1, CL2, CL3 to form six differential signal pairs S+, S-, and Interleaved ground contact G. The first electrical connector 110A can be mated to the receptacle housing 240A shown in FIG. 1C.

As shown in FIG. 2, a head mating area of the first electrical connector 110 is defined by an fictitious square or rectangular perimeter P1 that intersects the electrical contacts 1, 2, 3, 4 and includes a fictitious perimeter. P1 constrained headstock mating portion 150. Although FIG. 2 shows four center lines CL1, CL2, CL3, and CL4 of twelve contacts, each of the center lines has four differential signal pairs and four interleaved ground contacts, but Add more electrical contact center lines or more electrical contacts 130 in the Y direction to enlarge the total area of the head mating area. For each of the midline has four differential signal pairs and staggered ground contacts, the number of differential signals per inch in the card edge or X direction will be about fifty-six at the 1.8 mm midline spacing. At the 1.5mm midline interval, there are about sixty-eight. The card spacing between the daughter cards stacked one on top of the back or midplane is less than 25 mm, preferably about 18 mm or less. For each of the center lines with five differential signal pairs and staggered ground contacts, the number of differential signals per inch in the card edge X will be about seventy-one differential signals at the 1.8 mm midline interval. Yes, it is about eighty-five pairs at the 1.5 mm midline interval. The card spacing is less than 25 mm, and preferably about 21 mm. For each of the six mid-line differential signal pairs and the interleaved ground contacts, the number of differential signal pairs per inch is the same as discussed above. The card spacing is less than 35 mm, and preferably about 25 mm or less. An electrical connector with three differential signal pairs and an interleaved ground contact for each center line will be adapted to a 15 mm card spacing.

In general, each differential signal pair added adjacent to the individual midline in the Y direction and adjacent The card spacing of the ground contacts will increase by about 3 mm; and when a differential signal pair and adjacent ground contacts are omitted, the same amount will be reduced. Assuming that the midline interval and the number of midlines remain constant, then for each differential signal pair added to or removed from the centerline, each differential signal pair in the edge of the card will Add about fourteen to seventeen differential signal pairs.

With continued reference to FIG. 2, the socket footprint of the second electrical connector 210 is defined by the fictitious square or rectangular perimeter P2 through the socket compliant portion tail portions 5, 6, 7, and 8 and constrains socket compliance within the perimeter of P2 Section 260. For a six differential signal pair connector, the socket footprint of the second electrical connector is preferably about 20 mm by 20 mm. A non-orthogonal header footprint that is mated with six pairs of first electrical connectors 110 is also preferably about 20 mm by 20 mm. As shown in FIG. 2, the first electrical connector 110 can be disposed on a first substrate 105, such as a backplane or midplane. The second electrical connector 210 can be disposed on a second substrate 205, such as a daughter board.

3 is a front elevational view of a connector and corresponding channel footprint, such as first electrical connector 110A (FIG. 1D) disposed over the first substrate 105. For clarity, the header housing 120 has been hidden in FIG. As noted above, the first electrical connector 110A includes a plurality of electrical contacts 130 disposed along the centerline, and each header compliant portion 140 can include a further tail portion 265. However, both the header compliant portion 140 and the corresponding footprint above the first substrate 105 are configured for a shared channel disposed orthogonally through the first substrate 105 (eg, a backplane or a midplane). The tail portion 265 of the differential signal pair 275 and the corresponding substrate channel can be staggered with each other in opposite directions. That is, a tail portion and a channel of the differential signal pair 275 can be alternately arranged in the X direction, and a second tail portion and a channel of the second contact of the differential signal pair 275 can be alternately arranged. In the X direction. The ground contacts G adjacent to the differential signal pair may or may not be staggered with respect to the center line CL1.

More specifically, the tail portion 265 of the differential signal pair 275 positioned along the centerline CL1 may have a tail portion and a corresponding channel orientation, along with an adjacent centerline CL2. The tail of the tail portion 265 of the positioned differential signal pair 285 is oriented opposite the corresponding channel. Therefore, the tail portion 265 of the first contact of the first differential signal pair 275 positioned along the first center line CL1 and the corresponding channel can be staggered in the X direction. The tail portion 265 of a corresponding first contact of the second differential signal pair 285 in the second center line CL2 and the corresponding channel may be alternately arranged in the X direction. In addition, the tail portion 265 of the second contact of the first differential signal pair 275 positioned along the first center line CL1 and the corresponding channel may be alternately disposed in the X direction, and the second differential in the second center line The tail portion 265 of a second contact of the signal pair 285 and the corresponding channel can be staggered in the X direction. Therefore, the staggered arrangement pattern of the tail portion 265 and the individual channels positioned along the first center line CL1 may be opposite to the pattern of the individual channels of the tail portion 265 of the terminal of the joint positioned along the second center line CL2. This pattern can appear repeatedly for the remaining centerline.

The substrate channel footprint and the corresponding first electrical connector 110A shown in FIG. 3 provide at least six differential signal pairs 275, 285 positioned along the eleven centerlines CL1, CL2, CL3, and the like. Each of the centerlines may additionally include an individual ground contact/channel G between the pairs of signals disposed at the centerline. The substrate may define a centerline pitch Pc between the centerlines CL1, CL2. For example, the centerline pitch Pc of the substrate may be one and a half times the spacing of the channels or electrical contacts 130 in one of the other midlines. Preferably, the first electrical connector 110 and the channel have a square or rectangular footprint defined by a fictitious perimeter P3 that passes through 1A, 1B, 1C, 1D and constrains the header compliant portion 140 or interior aisle. The differential signal pair A can be positively paired and the differential signal pair V system can sacrifice the differential signal pair.

4A and 4B are front views of the second electrical connector 210 shown in Figs. 1A and 1B.

5A and 5B are front and isometric views, respectively, of the second electrical connector 210 shown in Figs. 1A and 1B, without the receptacle housing 240. The receptacle mating portion 270 of the right angle electrical contacts 250 can define the lead portion 290 and the mating end 280 without the receptacle housing 240. The mating ends 280 are offset from the centerline CL1 to fully accept the individual headstock mating portions 150 of the electrical contacts 130. That is, each of the mating ends 280 may be offset from a direction perpendicular to the direction in which the center line CL1 extends. Alternate mating ends 280 can also be offset Alternating directions. That is, the mating ends 280 of the first right angle electrical contacts in the right angle electrical contacts 250 may be offset from the center line CL1 in a first direction perpendicular to the center line CL1; and positioned along the same center line CL1. The mating end 280 of an adjacent right angle electrical contact 250 can be offset from the center line CL1 in a second direction opposite the first direction. The mating ends 280 can be bent toward the center line CL1. Therefore, the mating ends 280 of the right angle electrical contacts 250 can be adapted to fasten the blade header mating portions 150 of the first electrical contacts 130 from the first electrical connector 110 ( Figure 1), as described above, may be aligned along a centerline that coincides with line CL1 shown in Figure 5A.

6A and 6B are a top view and a side view, respectively, of the IMLA 220. As shown in FIG. 6B, each leadframe contact 250 can define a lead portion 255 (FIG. 14) that extends between the socket mating portion 270 and the socket compliant portion 260. The right angle electrical contacts 250 can define one or more angles. Ideally, the length of the right angle electrical contact 250 forming a differential signal pair 295 should be about 2 mm or less, such that the signal skew is less than 10 picoseconds. The IMLA 220 may also include a further tab 330 that may be defined or exposed in the recess 340 of the plastic dielectric material 301. For example, the dielectric material 310 may have a top surface 350. A recess 340 can be defined in the top surface 350 of the dielectric material 310 such that the tab 330 can be exposed in the recess 340.

As shown in FIG. 6B, the dielectric material 310 can include one or more protrusions 320. Each of the projections 320 can be an optional keyed feature extending from the interface in which the IMLA 220 is received into a cavity 380 (Fig. 7B) of the receptacle housing 240 (Fig. 7B). Electrical material 310. It should be appreciated that the IMLA 220 may have a plurality of cavities that receive protrusions that are identical to the projections 320 that extend from the socket housing 240 to minimize relative motion perpendicular to the mating direction.

7A and 7B are front and isometric views, respectively, of the socket housing 240. As shown in FIG. 9A, the socket housing 240 can define one or more mating windows 360, one or more mating pockets 370, and one or more pockets 380. The socket housing 240 may further comprise a complex A plurality of wall portions 390 that separate adjacent right angle electrical contacts 250 (Fig. 1A) along a centerline to prevent electrical shorting. As shown in FIG. 8A, when the first electrical connector 110 is mated with the second electrical connector 210, each of the mating windows 360 can receive a corresponding one of the first electrical connectors 110. A blade-shaped headstock mating portion 150 of the electrical contact 130.

Referring again to FIGS. 8A and 8B, a socket mating portion 270 from a corresponding right angle electrical contact 250 of the second electrical connector 210 (FIG. 1A) can extend into each of the mating recesses 370 and can The offset mating portions 280 are preloaded. The mating recesses 370 can be offset from one another to accommodate the offset mating ends 280 of the right angle electrical contacts 250. Each of the cavities 380 can receive a further projection 320 (Fig. 6B). The socket housing 240 can include a plurality of latches 400 for securing the IMLA 220 shown in Figures 6A and 6B into the socket housing 240.

A plurality of IMLAs 220 can be disposed in the socket housing 240 such that at least one of each of the IMLAs 220 is adjacent to another IMLA 220. For example, the mating portions 270 of the right angle electrical contacts 250 can be received in the mating recesses 370. The IMLAs 220 can be received in the mating pockets 370 until each of the individual tabs 320 is inserted into a corresponding recess 380. The IMLA organizer 230 (FIG. 9) can then be assembled to the IMLA 220 to complete the assembly of the second electrical connector 210.

Figure 9 is a side elevational view of the mated first and second electrical connectors 110, 210 shown in Figures 1A and 1B. As shown, each of the individual slots 280, which may be defined in a curved portion 410 of the IMLA organizer 230, can receive an additional tab 330 from a recess 340 in the IMLA 220. For example, each of the tabs 330 can define a first side and a second side opposite the first side.

10A through 10B depict an array of mating and socket mating portions 270 of the first electrical connector 130 of the right angle electrical contact 250. Each of the blade-shaped header mating portions 150 of the first electrical connectors 130 from the first electrical connector 110 (FIG. 1A) can be mated from the second electrical A corresponding mating end 280 of the connector 210 (FIG. 1A) has a right angle electrical contact 250 IMLA 220. Each of the mating ends 280 can contact one of the other headstock mating portions 150 in at least one location (preferably at least two locations).

As shown in FIGS. 10A and 10B, the first wide sides of the blade-like header seating portions 150 of the first electrical contacts 130 may define a first plane in a mid-line direction CLD. The second broad sides of the blade-like header seating portions 150 of the first electrical contacts 130 may define a second plane that may be offset from and parallel with the first plane. The partial mating ends 280 of the socket mating portions 270 can physically contact the first wide side of a corresponding blade head mating portion 150, but the second wide side of the same blade head mating portion 150 will not. The other mating ends 280 can physically contact a second wide side of a corresponding blade head mating portion 150, but the first opposing wide side does not. Therefore, a more balanced net force can be generated when the first electrical connector 110 is mated with the second electrical connector 210.

11A and 11B are the same as Figs. 10A and 10B. The IMLA 220A carries a right angle electrical contact 250. However, in this embodiment, two adjacent mating ends 280 contact one of the other first wide sides of two adjacent header mating portions 150, and the other two adjacent mating ends 280 contact the other One other second wide side of the two adjacent headstock mating portions 150.

12A and 12B are the same as Figs. 10A and 10B. The IMLA 220B carries a right angle electrical contact 250. However, in this embodiment, three adjacent mating ends 280 contact one other first wide side of three adjacent header mating portions 150, and another three adjacent mating ends 280 contact the other three One other second wide side of the adjacent header mating portion 150.

13A and 13B are the same as Figs. 10A and 10B. The IMLA 220C carries a right angle electrical contact 250. However, in this embodiment, four adjacent mating ends 280 contact one other first wide side of four adjacent header mating portions 150, and another four adjacent mating ends 280 contact the other four One other second wide side of the adjacent header mating portion 150.

It should be understood that while the embodiment of Figures 10A through 13B shows the opposite mating end 280 physically contacting the opposite wide-seat header mating portion 150 of the corresponding header mating portion 150.

Figure 14 shows a plurality of right angle electrical contacts 250 having been removed from the plastic dielectric material for clarity. The right angle electrical contacts 250 can include a plurality of differential signal pairs 420 and one or more conductive ground contacts 450. Each of the right angle electrical contacts 250 can define a lead portion 255 that extends between the socket mating portion 270 and the socket compliant portion 260. Wherein, the second electrical connector 210 is a right angle connector, and the lead portions 255 can define one or more angles. Each lead portion 255 can have a different length L-r. The right angle electrical contacts 250 may have different lengths, as shown, which may cause signal skew. Ideally, the length L-r of the right angle electrical contact 250 forming a differential signal pair 420 should be about 1 mm or less, such that the signal skew is less than 10 picoseconds.

Portion 460 is shown in more detail in FIG. FIG. 15 is a detailed view of the differential signal pair 420 and the ground contact 450 shown in FIG. As shown in FIG. 15, each of the differential signal pairs 420 can include a first signal contact 430 and a second signal contact 440. The first signal contact 430 and the second signal contact 440 can be separated by a distance D1 such that the first signal contact 430 and the second signal contact 440 are closely coupled to each other. In the plastic, the gap between the first signal contact 430 and the second signal contact 440 may be about 0.2 mm to 0.8 mm, depending on the height of the contacts and the thickness of the material. A preferred gap is from about 0.25 mm to about 0.4 mm. In air, the gap can be smaller. Adjacent ground contacts 450 may be separated from the differential signal pair within the IMLA 220 by a distance D2. The distance D2 can be about 1.5 to 4 times the distance D1. In the plastic, the D2 distance between the second signal contact 440 and the ground contact 450 may be about 0.3 mm to 0.8 mm. A preferred D2 distance is about 0.4 mm. In air, the value can be smaller. As discussed above, the height or width of the first signal contact 430 and the second signal contact 440 may be approximately equal to the thickness of the material, although it may also be greater than the thickness of the material. For example, the height can vary between about 0.1 mm and 0.9 mm.

The ground contact 450 may have the same dimension as the first signal contact 430 and the second signal contact 440 to optimize the spacing between the signal contact and the ground to generate an electrical connector. The differential signal pair density is greater than 82 differential signals per inch in the edge of the card Yes, and the stack card spacing distance is less than about 35 mm or 31 mm (preferably, about 25 mm), and the backplane to rear connector length is less than about 37 mm (preferably, about 35 mm). In addition, a second electrical connector having a plurality of right angle electrical contacts and more than eighty pairs of differential pairs and associated interleaved ground contacts 450 in the card edge will only bulge from a daughter card seating surface It is less than 20 mm and will only occupy a sub-card surface area of about 400 square millimeters.

16 shows that the electrical contacts 130 of the first electrical connector 110 may have an insert molded housing 480 adjacent the header mating portions 150. The insert molded housing 480 can hold electrical contacts 130 having different electrical and physical lengths.

Figure 17 depicts an array of electrical contacts 130 and the IMLA 220 of Figure 16 without the insert molded housing 480. The electrical contacts 130 define a different header lead portion 135 between each of the header compliant portions 140 and each of the header connectors 150. The header lead portions 135 of adjacent contacts may have different lengths. For example, a first electrical contact 470 may have a header lead portion 135 having a first physical and electrical length L1, and a second electrical contact 480 adjacent to the first electrical contact 470 may be There is a header lead portion 135 having a second physical and electrical length L2. In an exemplary embodiment, the first length L1 may be less than the second length L2 to correct for skew in the third and fourth electrical contacts 490 and 500.

For example, the third electrical contact 490 may have a third physical and electrical length L3, and a fourth electrical contact 500 adjacent to the third electrical contact 490 may have a fourth physical and electrical length. In an exemplary embodiment, the fourth physical and electrical length may be less than the third length. The third electrical contact 490 can be coupled to the first electrical contact 470 and the fourth electrical contact 500 can be coupled to the second electrical contact 480 such that the first physical and electrical length and The sum of the third physical and electrical lengths may be approximately equal to the sum of the second physical and electrical length and the fourth physical and electrical length. That is, the total electrical length between two contacts in a differential signal pair can be corrected for skew.

150‧‧‧ head joints

220‧‧‧Insert molded lead frame fittings

250‧‧‧right angle electrical contacts

270‧‧‧ socket adapter

280‧‧‧ Adapter

Claims (4)

An electrical connector that operates without a metal crosstalk plate, the electrical connector including more than 82 differential signal pairs and interleaved ground contacts per inch of the card edge and a card spacing of less than 35 mm. An electrical connector that operates without a metal crosstalk board, the electrical connector including 71 differential signal pairs per inch and interleaved ground contacts in the card edge and a card spacing of less than 25 mm. An electrical connector that operates without a metal crosstalk plate, the electrical connector including 56 differential signal pairs per inch and interleaved ground contacts in the card edge and a card spacing of less than 25 mm. An electrical connector that operates without a metal crosstalk plate, the electrical connector comprising an insert molded lead frame assembly (IMLA) having a plurality of differential signal pairs and interleaved each IMLA extending along an individual centerline The grounding point, wherein the three differential signal pairs and the staggered grounding points of each of the neutral lines conform to a card spacing of 15 mm.