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EP2811589B1 - Elektrischer Verbinder und Leiterplattenanordnung damit - Google Patents

Elektrischer Verbinder und Leiterplattenanordnung damit Download PDF

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Publication number
EP2811589B1
EP2811589B1 EP14171032.7A EP14171032A EP2811589B1 EP 2811589 B1 EP2811589 B1 EP 2811589B1 EP 14171032 A EP14171032 A EP 14171032A EP 2811589 B1 EP2811589 B1 EP 2811589B1
Authority
EP
European Patent Office
Prior art keywords
circuit board
contacts
ground
electrical connector
connector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP14171032.7A
Other languages
English (en)
French (fr)
Other versions
EP2811589A1 (de
Inventor
Myoungsoo Jeon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
Tyco Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US13/910,670 external-priority patent/US8888531B2/en
Application filed by Tyco Electronics Corp filed Critical Tyco Electronics Corp
Publication of EP2811589A1 publication Critical patent/EP2811589A1/de
Application granted granted Critical
Publication of EP2811589B1 publication Critical patent/EP2811589B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6582—Shield structure with resilient means for engaging mating connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6585—Shielding material individually surrounding or interposed between mutually spaced contacts
    • H01R13/6588—Shielding material individually surrounding or interposed between mutually spaced contacts with through openings for individual contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6594—Specific features or arrangements of connection of shield to conductive members the shield being mounted on a PCB and connected to conductive members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/73—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • H01R12/735—Printed circuits including an angle between each other
    • H01R12/737—Printed circuits being substantially perpendicular to each other

Definitions

  • the invention relates to an electrical connector having grounding features to improve electrical performance.
  • At least one problem area is the interface between electrical components, such as between two electrical connectors.
  • the electrical connectors include conductive housings that function as shields for the electrical connectors. When the electrical connectors are mated together, the housings are also electrically coupled thereby establishing a return path between the electrical connectors.
  • gaps along the interface can occur due to, for example, manufacturing tolerances of the electrical connectors or unwanted particles (e.g., dirt or dust) between the electrical connectors. These gaps can negatively affect the electrical performance of the connector assembly.
  • the interface between an electrical connector and a circuit board may also have gaps that negatively affect the electrical performance of the assembly.
  • US 2013/0089993 discloses an electrical connector for connecting to a mating connector.
  • a grounding matrix can be positioned between the electrical connectors to electrically couple the electrical connectors.
  • US 8,002,581 discloses a connector assembly including a shield body holding contact tails, for mounting to a circuit board.
  • a conductive gasket engages the shield body and defines a ground path between the shield body and a ground plane of the circuit board.
  • an electrical connector according to any one of the appended claims 1 to 5, and a circuit board assembly incorporating the electrical connector, according to any one of the appended claims 6 to 10.
  • FIG. 1 illustrates an electrical connector assembly 100 formed in accordance with an example.
  • the connector assembly 100 includes first and second electrical connectors 102, 104 and a grounding matrix 106 held by the electrical connector 102.
  • the electrical connector 104 may hold the grounding matrix 106.
  • the electrical connectors 102, 104 are configured to engage each other and establish an electrical connection therebetween during a mating operation.
  • the first electrical connector 102 may be referred to as a header connector of a backplane system
  • the second electrical connector 104 may be referred to as a receptacle connector of the backplane system.
  • the connector assembly 100 is oriented with respect to mutually perpendicular axes 191-193 including a mating axis 191 and lateral axes 192, 193.
  • the electrical connector 102 has a mounting side 110 and an engagement side 112, and the electrical connector 104 also has a mounting side 114 and an engagement side 116.
  • the mounting and engagement sides 110, 112 face in opposite directions along the mating axis 191, and the mounting and engagement sides 114, 116 also face in opposite directions.
  • the electrical connectors 102, 104 may be characterized as vertical connectors. However, in alternative examples, the electrical connectors 102 and 104 may be right-angle connectors in which the respective mounting and engagement sides face in perpendicular directions with respect to each other.
  • the mounting sides 110, 114 are configured to engage respective electrical components, such as circuit boards (not shown).
  • the electrical connector 102 includes a connector body or housing 118, and the electrical connector 104 includes a connector body 120.
  • the connector bodies 118, 120 comprise conductive material (e.g., metal, a mold with conductive particles, and the like).
  • the connector bodies 118, 120 may form a return path when the electrical connectors 102, 104 are mated.
  • the electrical connector 102 includes electrical terminals 122 that are held by the connector body 118 in an array.
  • the electrical connector 104 also includes electrical terminals (not shown).
  • the electrical terminals of the electrical connector 104 may also be referred to as mating terminals.
  • the electrical connector 102 has a body-receiving cavity 126 that opens to the engagement side 112.
  • the receiving cavity 126 is sized and shaped to receive the connector body 120.
  • the receiving cavity 126 receives the engagement side 116.
  • the electrical terminals 122 and the electrical terminals of the electrical connector 104 engage each other and establish the electrical connection.
  • the grounding matrix 106 operates to electrically couple the connector bodies 118, 120 along a mating interface.
  • the engagement side 116 includes a receiving cavity and the engagement side 112 is configured to be received by the receiving cavity of the engagement side 116.
  • the electrical connectors 102, 104 When the electrical connectors 102, 104 are mated, the electrical connectors 102, 104 are moved relatively toward each other along a mating direction M 1 that extends substantially parallel to the mating axis 191.
  • the mating direction M 1 is indicated as being bi-directional because the electrical connector 102 may be moved toward the electrical connector 104 or vice versa. Furthermore, both of the electrical connectors 102, 104 can be moved toward each other at the same time.
  • the electrical terminals 122 and the electrical terminals of the electrical connector 104 slidably engage each other during the mating operation.
  • the electrical connector 102 is a backplane connector and the electrical connector 104 is a daughter card connector.
  • the electrical connector 102 may be a daughter card connector and the electrical connector 104 may be a backplane connector.
  • the connector assembly 100 is described herein with reference to a backplane connector and a daughter card connector, it is realized that the subject matter herein may be utilized with different types of electrical connectors other than a backplane connector or a daughter card connector.
  • the backplane connector and the daughter card connector are merely illustrative of an example of the connector assembly 100.
  • the connector assembly 100 transmits high-speed data signals.
  • the data signals may be transmitted at speeds greater than or equal to 15 Gbps.
  • the data signals may be transmitted at speeds greater than or equal to 20 Gbps or greater than or equal to 25 Gbps.
  • the connector assembly 100 may transmit data signals at slower speeds.
  • Figure 2 is a perspective view of the electrical connector 102 and the grounding matrix 106.
  • the connector body 118 includes housing walls 128-131 and a conductive surface 132 that define the receiving cavity 126.
  • the housing walls 128-131 project from the conductive surface 132 along the mating axis 191.
  • the conductive surface 132 defines a depth D 1 of the receiving cavity 126 measured from edges of the housing walls 128-131.
  • the receiving cavity 126 not only opens to the engagement side 112 in a direction along the mating axis 191 but also opens to the exterior of the electrical connector 102 in directions along the lateral axes 192, 193.
  • the housing walls 128-131 may have openings 138-141 therebetween that provide access to the receiving cavity 126 from the exterior.
  • one or more of the openings 138-141 complement features of the electrical connector 104 such that the features slide through the openings 138-141.
  • the electrical terminals 122 constitute contact towers that project away from the conductive surface 132 along the mating axis.
  • the electrical terminals 122 may also constitute socket contacts that have respective contact cavities 134 that are configured to receive the electrical terminals of the electrical connector 104.
  • the electrical terminals 122 extend a height H from the conductive surface 132.
  • the height H may be substantially equal to the depth D 1 .
  • the electrical terminals 122 have substantially equal heights H with respect to one another. In alternative examples, the heights H may be different.
  • Figure 3 shows an arrangement of the electrical terminals 122 located on the conductive surface 132 ( Figure 2 ) according to an exemplary embodiment. As shown, the electrical terminals 122 are spaced apart from one another and positioned in an array along the conductive surface 132. In the illustrated example, the electrical terminals 122 are arranged in rows and columns in the array. However, the array is not required to have linear rows or columns. Instead, the electrical terminals 122 can be located in any predetermined arrangement that is desired.
  • adjacent terminals 122 may be separated by gaps 142 and by gaps 144.
  • the gaps 142 extend generally along the lateral axis 192 ( Figure 1 ), and the gaps 144 extend generally along the lateral axis 193 ( Figure 1 ).
  • Two terminals can be adjacent if no other terminal is located therebetween.
  • adjacent terminals 122 may also be separated by gaps 143 that extend diagonally with respect to the lateral axes 192, 193.
  • the gaps 142-144 may collectively form an interwoven reception region 146 that extends along the conductive surface 132 between the electrical terminals 122.
  • the reception region 146 may include first and second paths 148, 150 in which each of the first and second paths 148, 150 extends through a plurality of the gaps that separate the electrical terminals 122.
  • the paths 148, 150 may extend continuously therethrough without being interrupted by walls or other projections extending from the conductive surface 132.
  • a reception region is interwoven when at least two of the paths extend along a plurality of corresponding terminals and intersect each other.
  • the reception region 146 includes the first path 148 that extends along corresponding terminals 122 through the gaps 142, 143 and also includes the second path 150 that extends along corresponding terminals 122 through the gaps 144, 143.
  • Each of the first and second paths 148, 150 extends along a series of terminals 122.
  • first path 148 extends parallel to the lateral axis 193
  • second path 150 extends parallel to the lateral axis 192 such that the paths 148, 150 intersect each other in a perpendicular manner.
  • reception region 146 may include a plurality of first paths 148 and a plurality of second paths 150 that intersect one another.
  • the paths 148, 150 are substantially linear and perpendicular to each other.
  • the paths 148, 150 may be non-linear and/or may not extend perpendicular to each other.
  • the solid dots 184 and the hollow dots 186 shown in Figure 3 represent contact points where the grounding matrix 106 engages the electrical connectors 102, 104 ( Figure 1 ), respectively.
  • the grounding matrix 106 may be positioned within the receiving cavity 126 along the conductive surface 132.
  • the grounding matrix 106 can have a substantially planar body or frame 136 that includes ground contacts 152 and linkages 154, 155 that interconnect the ground contacts 152 in a web-like manner.
  • the ground contacts 152 and the linkages 154, 155 may form openings 156.
  • the ground contacts 152 and linkages 154 may be located in at least some of the gaps 142, 144 ( Figure 3 ) and paths 148, 150 ( Figure 3 ).
  • the electrical terminals 122 may advance or extend through the openings 156.
  • the grounding matrix 106 is stamped-and-formed from a layer of sheet material.
  • the grounding matrix 106 may be conductive throughout.
  • the grounding matrix 106 can be formed in different manners in other examples.
  • the grounding matrix may include an organizer that holds separate ground contacts.
  • the organizer may include the linkages.
  • the grounding matrix 106 may include edge members 160 along an outer perimeter of the grounding matrix 106.
  • the edge members 160 can be outwardly projecting tabs as shown in Figure 2 .
  • the housing walls 128-131 may include interior slots or grooves 158 that are configured to receive the edge members 160. When the grounding matrix 106 is deposited into the reception region 146, the edge members 160 frictionally engage the slots 158.
  • the grounding matrix 106 is floatably coupled to the electrical connector 102 such that the grounding matrix 106 is movable with respect to the connector body 118.
  • the grounding matrix 106 can be at least floatable along the mating axis 191 toward and away from the conductive surface 132.
  • FIG 4 is an enlarged perspective view of a portion of the grounding matrix 106 showing the ground contacts 152 and the linkages 154, 155 in greater detail.
  • the linkages include inner linkages 154, end linkages 155A, and side linkages 155B.
  • the end and side linkages 155A, 155B define a perimeter of the grounding matrix 106.
  • the inner linkages 154 join adjacent ground contacts 152A and 152B.
  • the inner linkages 154 may be characterized as inter-contact linkages.
  • the inner linkages 154 have a linkage body 162 with contoured edges 164.
  • the body 162 is sized and shaped to be positioned within a corresponding gap 144 ( Figure 3 ) between adjacent terminals 122 ( Figure 1 ).
  • the edges 164 may be shaped to extend along an exterior surface of the corresponding terminal 122.
  • the inner linkages 154 may prevent movement of the grounding matrix 106 in a direction along a plane defined by the lateral axes 192, 193 ( Figure 1 ). In some examples, the inner linkages 154 may also improve the shielding abilities of the connector assembly 100 ( Figure 1 ).
  • the end linkage 155A joins adjacent ground contacts 152C and 152D.
  • the side linkages 155B also include the edge members 160 extending outward therefrom.
  • the end and side linkages 155A, 155B surround the ground contacts 152.
  • the end linkages 155A may also have contoured edges 166 that are configured to extend along an exterior surface of the corresponding terminal 122.
  • FIG 5 is an isolated view of an example of the ground contact 152.
  • ground contacts described herein may include one or more flex portions that extend away from or toward the conductive surface 132 ( Figure 2 ).
  • the ground contact 152 shown in Figure 5 has first and second flex portions 170, 172 and a contact base 175 that joins the flex portions 170, 172.
  • the contact base 175 may be located within and extend along a contact plane P.
  • the contact plane P may extend parallel to a plane defined by the lateral axes 192, 193 ( Figure 1 ).
  • the flex portions 170, 172 extend from the contact base 175 in opposite directions away from each other to respective distal ends 171, 173.
  • the flex portions 170, 172 also extend away from the contact plane P.
  • the flex portions 170, 172 curve or curl in the same direction away from the contact plane P.
  • the ground contact 152 may be substantially C-shaped or cup-shaped.
  • the flex portions 170, 172 may have different shapes.
  • the ground contact 152 may have an overall V-shape or the ground contact 152 may have no curve and extend in a linear manner.
  • One of the flex portions may extend in one direction away from the contact plane P, and the other flex portion may extend in an opposite direction away from the contact plane P.
  • the grounding matrix 106 may not include the flex portions 170, 172. In such examples, the grounding matrix 106 may include only linkages, such as the inner linkages 154 and the end and side linkages 155A, 155B.
  • the ground contacts 152 may have different features or characteristics with respect to one another.
  • the grounding matrix 106 may include different ground contacts 152A-D.
  • the ground contacts 152A include flex portions 170A, 172A that extend toward the conductive surface 132 when the grounding matrix 106 is properly positioned.
  • the ground contacts 152B include flex portions 170B, 172B that extend away from the conductive surface 132.
  • the ground contacts 152C and 152D each include a single flex portion 174, 176, respectively.
  • the flex portions 174, 176 extend toward and away from the conductive surface 132, respectively.
  • Figure 6 is a side view of the electrical connector 102 having the grounding matrix 106 positioned within the reception region 146
  • Figure 7 is an enlarged perspective view showing the grounding matrix 106 and the conductive surface 132 in greater detail.
  • the connector body 118 has a pair of channels 180, 182 that extend through the connector body 118.
  • the channels 180, 182 may be defined between the conductive surface 132 and the housing walls 128-131.
  • the channels 180, 182 are configured to receive corresponding edge members 160 when the grounding matrix 106 is positioned within the reception region 146.
  • the edge members 160 may be partially deflected by the housing walls 128-131.
  • the edge members 160 may resile back into a non-deflected position after entering the channels 180, 182, and clearing the housing walls 128-131.
  • the ground contacts 152A ( Figure 7 ), 152C ( Figure 6 ) engage the conductive surface 132 and the ground contacts 152B ( Figure 7 ), 152D ( Figure 6 ) extend away from the conductive surface 132.
  • a plurality of the ground contacts 152 are located adjacent to one or more of the electrical terminals 122, and a plurality of the ground contacts 152 are located between two terminals 122.
  • the ground contacts 152A, 152C are configured to initially engage the conductive surface 132 and the ground contacts 152B, 152D are configured to initially engage a corresponding conductive surface (not shown) of the mating connector 104 ( Figure 1 ).
  • the grounding matrix 106 engages each of the conductive surfaces thereby establishing an electrical connection between the connector bodies 118, 120 ( Figure 1 ).
  • the grounding matrix 106 engages the connector body 120 at a plurality of contact points 184 (shown as solid dots in Figure 3 ) where the flex portions 170B, 172B ( Figure 7 ) contact the conductive surface (not shown) of the electrical connector 104 ( Figure 1 ).
  • the grounding matrix 106 also engages the connector body 118 at a plurality of contact points 186 (shown as hollow dots in Figure 3 ) where the flex portions 170A, 172A ( Figure 7 ) contact the conductive surface 132.
  • the ground contacts 152A and 152B alternate in the array such that for each ground contact 152A that engages the conductive surface 132, the adjacent ground contacts 152B engage the conductive surface (not shown) of the electrical connector 104 and for each ground contact 152B that engages the conductive surface of the electrical connector 104, the adjacent ground contacts 152A engage the conductive surface 132.
  • the inner linkages 154, the end linkages 155A, the side linkages 155B, and the ground contacts 152 are part of the same stamped-and-formed sheet material.
  • the ground contacts 152 may be indirectly coupled to each other through, e.g., an organizer or interposer.
  • the organizer could include a planar dielectric body having holes configured to receive one or more ground contacts 152 and openings configured to receive the electrical terminals 122.
  • the ground contacts 152 may be entirely independent from each other such that each ground contact 152 is separately positioned within the reception region 146.
  • Figure 8 illustrates a communication system 300 that includes a circuit board assembly 302 and a circuit board assembly 304 that are configured to engage each other during a mating operation.
  • the communication system 300 is oriented with respect to mutually perpendicular axes 391-393, including a mating axis 391 and lateral axes 392, 393.
  • the circuit board assembly 302 includes an electrical connector 306 (hereinafter referred to as a receptacle connector 306), a circuit board 308, and a grounding matrix 310.
  • the circuit board 308 includes a leading edge 312 and opposite first and second sides 314, 315.
  • the first side 314 is hereinafter referred to as the engagement side 314.
  • the receptacle connector 306 is mounted to the engagement side 314 along the leading edge 312.
  • the circuit board assembly 304 includes a header connector 316, a circuit board 318, and a grounding matrix 320.
  • the circuit board 318 has opposite first and second sides 322, 323.
  • the first side 322 is hereinafter referred to as the engagement side 322.
  • the circuit board assembly 304 also includes a grounding matrix 321 (shown in Figure 14 ) between the header connector 316 and the circuit board 318.
  • the grounding matrix 310 is located along a mounting interface 327 between the circuit board 308 and the receptacle connector 306.
  • the grounding matrix 321 is located along a mounting interface 326 between the circuit board 318 and the header connector 316.
  • the grounding matrix 320 may be located along a mating interface (not shown) between the receptacle and header connectors 306, 316.
  • the grounding matrices 310, 320, and 321 are configured to establish multiple contact points between two components along a corresponding interface so that a ground or return path is maintained during operation.
  • the grounding matrix 310 is configured to provide multiple contact points along the mounting interface 327.
  • the grounding matrix 321 is configured to provide multiple contact points along the mounting interface 326.
  • the grounding matrix 320 is configured to provide multiple contact points along the interface between the receptacle and header connectors 306, 316.
  • the grounding matrices 310, 320, and 321 may improve the electrical performance (e.g., improve the communication of data signals) between the corresponding mated components.
  • the header connector 316 has a mating side 324 that includes electrical terminals 325 disposed therealong. Each of the electrical terminals 325 includes a contact housing 328 that surrounds a corresponding pair of electrical contacts (not shown).
  • the receptacle connector 306 also has a mating side 330 that includes socket cavities (not shown) that each include a pair of electrical contacts (not shown) therein.
  • the mating side 330 of the receptacle connector 306 is advanced toward the mating side 324 of the header connector 316.
  • the electrical terminals 325 are received by corresponding socket cavities of the receptacle connector 306 and advanced into the socket cavities until the contacts of the electrical terminals and the contacts in the socket cavities engage each other.
  • the grounding matrix 320 may be compressed by and between the receptacle and header connectors 306, 316 thereby establishing a ground path.
  • the communication system 300 may be used in various applications.
  • the communication system 300 may be used in telecom and computer applications, routers, servers, supercomputers, and uninterruptible power supply (UPS) systems.
  • the circuit board assembly 302 may be described as a daughter card assembly and the circuit board assembly 304 may be described a backplane connector assembly.
  • the receptacle and header connectors 306, 316 may be similar to electrical connectors of the STRADA Whisper or Z-PACK TinMan product lines developed by TE Connectivity.
  • the receptacle and header connectors 306, 316 are capable of transmitting data signals at high speeds, such as 10 Gbps, 20 Gbps, or more.
  • the communication system 300 is illustrated as a backplane system, embodiments are not limited to such systems and may be used in other types of communication systems.
  • the receptacle and header connectors 306, 316 may be referred to more generally as electrical connectors.
  • FIG 9 illustrates an isolated perspective view of the grounding matrix 310 as well as an enlarged portion of the grounding matrix 310.
  • the grounding matrix 320 Figure 8
  • the grounding matrix 321 Figure 14
  • the grounding matrix 310 may be similar to the grounding matrix 106 ( Figure 1 ).
  • the grounding matrix 310 can have a substantially planar body or frame 336 that includes ground contacts 340-343 and linkages 346, 348 that interconnect the ground contacts 340-343 in a web-like manner.
  • the ground contacts 340-343 and the linkages 346, 348 form openings 350.
  • the grounding matrix 310 is formed from conductive material.
  • materials that may be used to form the grounding matrix 310 include metal, a conductive elastomer, an elastomer coated with a conductive material, conductive tape, and the like.
  • the grounding matrix 310 is stamped-and-formed from sheet metal and is conductive throughout.
  • the grounding matrix 310 can be formed in different manners in other embodiments.
  • the grounding matrix may include an organizer comprising a dielectric frame that holds the ground contacts. In some cases, at least some of these ground contacts may be electrically isolated from others.
  • the grounding matrix 310 include attachment features 352 along an outer perimeter of the grounding matrix 310.
  • the attachment features 352 can be projections or tabs that extend in a direction that is orthogonal to a plane defined by the grounding matrix 310.
  • the frame 336, portions of the ground contacts 340-343, and the linkages 346, 348 may coincide within a ground plane that is parallel to the mating and lateral axes 391, 393 in Figure 9 .
  • the attachment features 352 extend in a direction that is parallel to the lateral axis 392.
  • the attachment features 352 are configured to directly engage and couple to the receptacle connector 306 ( Figure 8 ) to secure the grounding matrix 310 to the receptacle connector 306.
  • the enlarged portion of Figure 9 illustrates the ground contacts 340-343 and the linkages 346, 348 in greater detail.
  • the linkages 346 are configured to directly connect the ground contacts 340, 342 to one another.
  • the linkages 346 join adjacent ground contacts 340, 342 in Figure 9 .
  • the linkages 348 extend along a perimeter of the grounding matrix 310 and join adjacent ground contacts, such as the ground contacts 341, 343.
  • the ground contacts described herein may include one or more flex portions that extend out of a ground plane defined by the grounding matrix 310.
  • the ground contact 342 has first and second flex portions 354, 356 and a contact base 358 that joins the flex portions 354, 356.
  • the flex portions 354, 356 extend from the contact base 358 in opposite directions away from each other to respective distal ends 355, 357 disposed at a distance from one side of the ground plane.
  • the ground contact 340 also has flex portions 354, 356. However, the flex portions 354, 356 of the ground contact 340 extend in an opposite direction from the ground plane as compared to the flex portions 354, 356 of the ground contact 342.
  • the flex portions 354, 356 may have a curved or curled contour such that the flex portions 354, 356 from a single ground contact extend in the same direction away from the ground plane.
  • the ground contacts 340, 342 may be substantially C-shaped.
  • the ground contacts 341, 343 may have only a single flex portion 361 that is similarly shaped as the flex portions 354, 356.
  • the flex portions 361 of the ground contacts 341, 343 may extend in generally opposite directions from the ground plane.
  • the contact bases 358 include a base projection 359.
  • the base projection 359 is shaped similar to a button in Figure 9 , but may have other shapes in alternative embodiments.
  • the base projection 359 extends from the ground plane in a direction opposite the direction that the flex portions 354, 356 extend and, in operation, is configured to engage an electrical component. For example, if the flex portions 354, 356 extend toward the receptacle connector 306 ( Figure 8 ), the base projection 359 may extend toward and directly engage the circuit board 308 ( Figure 8 ). If the flex portions 354, 356 extend toward the circuit board 308, the base projection 359 may extend toward and directly engage the receptacle connector 306.
  • Figure 10 includes a bottom perspective view of a portion of the circuit board assembly 302 and, in particular, the receptacle connector 306.
  • the receptacle connector 306 includes a connector body 360 having a mounting side 362 and the mating side 330.
  • the mounting side 362 is configured to be mounted to the circuit board 308 ( Figure 8 ) with the grounding matrix 310 therebetween.
  • the connector body 360 may be constructed from dielectric and conductive materials.
  • the connector body 360 includes a conductive (e.g., metallized) housing 370 that is formed from a plurality of module housings 372 and housing shields 374.
  • the conductive housing 370 includes three of the module housings 372, which are stacked side-by-side and located between a pair of the housing shields 374.
  • Each of the module housings 372 and the housing shields 374 may include a conductive material for grounding the circuit board assembly 302.
  • the housing shields 374 may be stamped-and-formed from sheet metal and the module housings 372 may include metallized exterior surfaces.
  • the receptacle connector 306 includes signal conductors 366 that are held by the connector body 360. As shown, the signal conductors 366 have signal contacts (or contact tails) 368 that project from the mounting side 362. The signal contacts 368 are configured to mechanically and electrically engage plated thru-holes (not shown) of the circuit board 308 ( Figure 8 ).
  • the signal contacts 368 extend through the openings 350 of the grounding matrix 310.
  • the signal contacts 368 form signal pairs 376A-376C.
  • Each signal pair 376A-376C extends through one of the openings 350.
  • adjacent signal pairs are separated and electrically shielded from each other by portions of the grounding matrix 310.
  • the adjacent signal pairs 376A and 376B are separated from each other by one of the linkages 346, and the adjacent signal pairs 376B and 376C are separated from each other by the ground contacts 341 and 342.
  • the attachment features 352 may extend into corresponding feature cavities or openings 378 of the connector body 360 and directly engage the connector body 360.
  • the attachment features 352 form an interference fit or frictional engagement with surfaces of the connector body 360 that define the feature cavities 378.
  • the frame 336 may be held at a designated position that is spaced apart from the mounting side 362 by a separation distance X 1 .
  • the attachment features 352 may grip exterior sides of the connector body 360.
  • the surface(s) of the connector body 360 that directly engage the attachment features 352 is conductive such that ground pathways are formed through the attachment features 352.
  • the attachment features 352 are stamped and formed with the frame 336 and ground contacts.
  • the attachment features 352 may be discrete elements that interconnect the frame 336 and the connector body 360.
  • the attachment features 352 may be separate fasteners (e.g., clips, plugs, or other hardware) that attach the frame 336 of the grounding matrix 310 to the connector body 360.
  • the grounding matrix 310 may be permitted to float relative to the mounting side 362.
  • the grounding matrix 310 may be permitted to float to and from the mounting side 362 and/or to float laterally such that the frame 336 moves parallel to the mounting side 362.
  • the attachment features 352 may be sized and shaped relative to the feature cavities 378 such that the attachment features 352 are permitted to move within the feature cavities 378.
  • FIG 11 is a top perspective view of the circuit board assembly 302 before the receptacle connector 306 is mounted to the circuit board 308.
  • the grounding matrix 310 is positioned along the mounting side 362.
  • the circuit board 308 includes a board substrate 380 that has the engagement side 314 and the opposite side 315.
  • the board substrate 380 has a thickness T 1 that is measured perpendicular to the sides 314, 315.
  • Figure 12 shows an enlarged portion of the circuit board 308 that is outlined in the box of Figure 11 .
  • the circuit board 308 includes signal vias 382 that are exposed along the engagement side 314.
  • the signal vias 382 may be arranged to fonii multiple signal pairs 384.
  • the circuit board 308 also includes ground vias 390 along the engagement side 314.
  • the ground vias 390 are positioned relative to the signal vias 382 to electrically shield the signal vias 382 from one another.
  • the ground vias 390 are positioned relative to the signal pairs 384 to electrically shield the signal pairs 384 from one another.
  • the circuit board 308 includes a conductive layer 388 and, optionally, a mask layer 386 that is located on top of the conductive layer 388.
  • the signal vias 382 are electrically isolated from the conductive layer 388.
  • portions of the conductive layer 388 may be removed (e.g., etched) so that the conductive layer 388 does not connect to the signal vias 382.
  • the conductive layer 388 may electrically join at least some of the ground vias 390.
  • the mask layer 386 may be patterned such that portions of the conductive layer 388 are exposed along the engagement side 314 and capable of engaging the ground contacts 340, 342 of the grounding matrix 310 ( Figure 9 ) as well as the ground contacts 341, 343 ( Figure 9 ).
  • the exposed portions may be referred to as contact areas 394 and may be sized and shaped relative to the corresponding ground contacts that engage the contact areas 394.
  • Figure 13 is a side cross-section of the receptacle connector 306 mounted to the circuit board 308.
  • the signal vias 382 are plated thru-holes (PTHs), and the ground vias 390 are microvias.
  • Microvias may be blind vias and have diameters that are typically smaller than diameters of the signal vias 382. For instance, the diameters of the microvias may be less than 0.4 mm.
  • Microvias may be manufactured through various processes, such as those that are used to manufacture blind vias. For example, microvias may be fabricated in one or more dielectric layers through mechanical drilling or laser drilling (e.g., using UV or CO2 lasers to provide a bore through the dielectric layer).
  • Microvias may also be photo-defined or etched (e.g., chemical (wet) etching or plasma etching) blind vias. Once the microvias are formed, the dielectric layers may then be laminated with other dielectric layers that have (or will have) microvias. In this manner, the microvias from the different dielectric layers may be effectively stacked together such that the microvias are substantially end-to-end and form columns.
  • U.S. Patent Application No. 13/493,632 (“the '632 Application") describes circuit boards having ground columns that may include microvias. Such circuit boards may include the conductive layer 388 and the mask layer 386 described herein. The '632 Application is incorporated herein by reference in its entirety.
  • the grounding matrix 310 extends along the mounting interface 327 that is defined between the receptacle connector 306 and the circuit board 308.
  • the flex portions 354 of the ground contacts 342 extend toward the mounting side 362 of the receptacle connector 306. Such ground contacts 342 may be described as inward-extending contacts.
  • the flex portions 354 of the ground contacts 340 extend away from the mounting side 362 toward the engagement side 314 of the circuit board 308.
  • Such ground contacts 340 may be described as outward-extending contacts.
  • the signal contacts 368 form an array 369 that includes gaps 398, which may be similar to the gaps 142-144 ( Figure 3 ). As shown, each gap 398 extends between adjacent signal contacts 368. Before or during the mounting operation, the receptacle connector 306 may be coupled to the grounding matrix 310. The signal contacts 368 may be advanced through the openings 350 and the ground contacts 340, 342 may be positioned within corresponding gaps 398.
  • Figure 13 illustrates a cross-section of one of the module housings 372.
  • the module housing 372 includes a conductive body material 402 and dielectric ribs 404.
  • the body material 402 defines channels 406 through which the dielectric ribs 404 extend.
  • the dielectric ribs 404 may extend continuously from the mounting side 362 to proximate to the mating side 330 ( Figure 8 ).
  • Each of the dielectric ribs 404 holds one of the signal conductors 366.
  • the dielectric ribs 404 may be applied to the signal conductors 366 through, for example, an overmolding process.
  • the ground contacts 340 directly engage the contact areas 394 of the conductive layer 388, and the ground contacts 342 directly engage the body material 402.
  • the contact areas 394 may have a width W 1 that is greater than a width W 2 of the ground contact 340 to ensure that the ground contacts 340 will engage the conductive layer 388 without riding on the mask layer 386.
  • ground contacts 340, 342 resiliently flex with respect to the mounting side 362 or the engagement side 314 when the receptacle connector 306 is mounted to the circuit board 308. With the ground contacts 340, 342 directly engaging the engagement and mounting sides, 314, 362, respectively, the grounding matrix 310 establishes at least one ground pathway through the grounding matrix 310 between the receptacle connector 306 and the circuit board 308. Ground pathways may also be formed through the conductive body material 402 of the receptacle connector 306 and the ground vias 390 of the circuit board 308.
  • the signal contacts 368 directly engage the signal vias 382. More specifically, the signal contacts 368 frictionally engage interior surfaces of the signal vias 382. Collectively, these frictional engagements provide a retention force. In some embodiments, the retention force is greater than a separation force exerted by the ground contacts 340, 342. In other embodiments, additional elements, such as fasteners, may be used to attach the receptacle connector 306 to the circuit board 308.
  • the signal contacts 368 are inserted into corresponding signal vias 382 of the circuit board 308.
  • the ground contacts 340, 342 are compressed such that the flex portions 354 and the flex portions 356 (not shown) are moved toward the mounting side 362.
  • the resilient nature of the flex portions 354, 356 permits the flex portions 354, 356 to independently flex with respect to the mounting side 362.
  • each of the flex portions 354, 356 may be deflected more or less than other flex portions 354, 356.
  • multiple contact points between the grounding matrix 310 and the engagement side 314 and multiple contact points between the grounding matrix 310 and the mounting side 362 may be formed and sustained throughout operation of the circuit board assembly 302.
  • Figure 14 includes a bottom perspective view of a portion of the circuit board assembly 304 and, in particular, the header connector 316 and the grounding matrix 321.
  • the header connector 316 includes a connector body 410 having a mounting side 412 and the mating side 324.
  • the mounting and mating sides 412, 324 face in opposite directions.
  • the connector body 410 includes a pair of housing walls 418, 420 that project from the mating side 324 in a direction parallel to the electrical terminals 325.
  • the housing walls 418, 420 define a connector-receiving region 422 therebetween.
  • the connector-receiving region 422 is sized and shaped to receive the mating side 330 ( Figure 8 ) of the receptacle connector 306 ( Figure 8 ).
  • the electrical terminals 325 are disposed within the connector-receiving region 422.
  • the header connector 316 also includes signal conductors 414 that are held by the connector body 410.
  • the signal conductors 414 extend substantially linearly through the connector body 410 and include signal contacts (or contact tails) 416 that project from the mounting side 412.
  • the signal contacts 416 are configured to mechanically and electrically engage plated thru-holes (not shown) of the circuit board 318 ( Figure 8 ).
  • the signal contacts 416 and the grounding matrix 321 may have similar configurations as the configurations of the signal contacts 368 ( Figure 10 ) and the grounding matrix 310 ( Figure 8 ).
  • the signal contacts 416 form signal pairs 424A-424C and each signal pair 424A-424C extends through a corresponding opening 426 of the grounding matrix 321.
  • Adjacent signal pairs are separated and electrically shielded from each other by portions of the grounding matrix 321. More specifically, the adjacent signal pairs 424A and 424B are separated from each other by a linkage 428, and the adjacent signal pairs 424B and 424C are separated from each other by ground contacts 430, 432.
  • the grounding matrix 321 also includes attachment features 434.
  • the attachment features 434 may be projections or tabs that are configured to directly engage the connector body 410.
  • the attachment features 434 may extend into corresponding feature cavities or openings 436 of the connector body 410 and directly engage the connector body 410.
  • the attachment features 434 form an interference fit with surfaces of the connector body 410 that define the feature cavities 436.
  • a frame 438 of the grounding matrix 321 may be held at a designated position that is spaced apart from the mounting side 412 by a separation distance X 2 .
  • the grounding matrix 321 may be permitted to float with respect to the mounting side 412.
  • the grounding matrix 321 may be permitted to float to and from the mounting side 412 and/or to float laterally such that the frame 438 moves parallel to the mounting side 412.
  • the header connector 316 may be mounted to the circuit board 318 in a similar manner as described with respect to the receptacle connector 306 ( Figure 8 ) and the circuit board 308 ( Figure 8 ).
  • the ground contacts e.g., the ground contacts 430, 432
  • the grounding matrix 321 may directly engage the engagement side 322 ( Figure 8 ) of the circuit board 318 and the mounting side 412 of the header connector 316.
  • multiple contact points between the grounding matrix 321 and the engagement side 322 and multiple contact points between the grounding matrix 321 and the mounting side 412 may be formed and sustained throughout operation of the circuit board assembly 304 ( Figure 8 ).
  • ground pathways may be formed through conductive body material (not shown) of the connector body 410 and ground vias (not shown) of the circuit board 318 in a similar manner as described above with respect to the circuit board assembly 302 ( Figure 8 ).
  • Figure 15 is a plan view of the circuit board 308 and illustrates one arrangement of the signal vias 382, the ground vias 390, and the contact areas 394 in greater detail.
  • the circuit board 318 ( Figure 8 ) can be similar or identical to the circuit board 308.
  • the signal vias 382 are arranged to form a plurality of signal pairs 384.
  • the signal pairs 384 are arranged in a row and column configuration although other configurations may be used.
  • the conductive layer 388 which is shaded in Figure 15 , spans across the engagement side 314 under the mask layer 386 and joins the ground vias 390.
  • the contact areas 394 of the conductive layer 388 are exposed along the engagement side 314.
  • the contact areas 394 form elongated strips 442 in which each elongated strip 442 joins a plurality of the ground vias 390.
  • the elongated strips 442 may extend continuously along one dimension of the engagement side 314.
  • the conductive layer 388 extends beneath the mask layer 386 such that each elongated strip 442 is part of a single layer.
  • the conductive layer 388 may be, for example, etched such that the elongated strips 442 are part of separate structures along the engagement side 314.
  • the contact areas 394 are sized and shaped to be directly engaged by the ground contacts 340-343 ( Figure 9 ) when the receptacle connector 306 ( Figure 8 ) is mounted onto the circuit board 308 as described herein.
  • contact points 444 are indicated along the contact areas 394 in Figure 15 .
  • the contact points 444 represent areas where the distal ends 355, 357 ( Figure 9 ) of the ground contacts 340-343 directly engage the contact areas 394. Due to tolerances in manufacturing of the various components of the receptacle connector 306 and the grounding matrix 310 ( Figure 9 ), the size and shape of the contact areas 394 may permit some misalignment between the distal ends 355, 357 and the conductive layer 388. Furthermore, during a mounting operation, the size and shape of the contact areas 394 may permit the distal ends 355, 357 of the ground contacts 340-343 to slide along the conductive layer 388 (also referred to as "wiping").
  • the ground vias 390 are positioned to form shield arrays 440 that surround corresponding signal pairs 384.
  • Representative perimeters of the shield arrays 440A and 440B are indicated by dashed lines that extend between and connect the corresponding ground vias 390 of the corresponding shield arrays 440A, 440B.
  • the shield arrays 440 may be similar to the shield arrays described in the '632 Application, which is incorporated herein by reference in its entirety.
  • the shield arrays 440 are configured to reduce crosstalk experienced by the signal pairs 384.
  • the signal pairs 384A and 384B are adjacent signal pairs.
  • the shield arrays 440A, 440B surround the signal pairs 384A and 384B, respectively.
  • each of the shield arrays 384A and 384B includes eight ground vias 390.
  • alternative configurations of the shield arrays may include fewer or more ground vias.
  • the shield arrays 440A, 440B may share common ground vias 390'.
  • the shield arrays 440A, 440B share two common ground vias 390'.
  • the shield arrays 341343 may not share common ground vias.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (10)

  1. Elektrischer Verbinder (306), der einen Verbinderkörper (360) mit einer Montageseite (362) und einer Gruppe (369) von Signalkontakten (368) umfasst, die entlang der Montageseite (362) angeordnet sind, wobei die Gruppe (369) von Signalkontakten zwischen benachbarten Signalkontakten (368) der Gruppe (369) ausgebildete Lücken (398) und eine entlang der Montageseite (362) verlaufende Erdungsmatrix (310) aufweist, wobei die Erdungsmatrix (310) mehrere Massekontakte (340, 341, 342, 343) aufweist, die auf netzähnliche Weise durch Verbindungsstücke (346, 348) untereinander verbunden sind, um mehrere Öffnungen (350) zu definieren, wobei die Signalkontakte (368) des elektrischen Verbinders (306) durch die Öffnungen (350) verlaufen, wobei die Massekontakte (340-343) elektrisch mit dem elektrischen Verbinder (306) verbunden sind, und dadurch gekennzeichnet, dass die Erdungsmatrix (310) Befestigungsmerkmale (352) beinhaltet, die in einer Richtung orthogonal zu einer durch die Erdungsmatrix definierten Ebene verlaufen und die direkt in eine leitende Fläche des elektrischen Verbinders (306) eingreifen und elektrisch damit verbunden sind, um die Erdungsmatrix (310) in einer designierten Position zu halten, in der die Verbindungsstücke (346, 348) von der Montageseite (362) durch einen Trennabstand (X1) beabstandet sind.
  2. Elektrischer Verbinder (306) nach Anspruch 1, der ferner Signalleiter (366) umfasst, die die Signalkontakte (368) beinhalten, wobei die Massekontakte (340-343) elektrisch mit einem oder mehreren Massepfaden gekoppelt sind, die durch den elektrischen Verbinder (306) verlaufen, wenn die Erdungsmatrix (310) zwischen dem elektrischen Verbinder (306) und einer elektrischen Komponente (308) komprimiert wird.
  3. Elektrischer Verbinder (306) nach einem vorherigen Anspruch, wobei die Massekontakte (340-343) einwärts verlaufende Kontakte (342) aufweisen, die in Richtung der Montageseite (362) verlaufen.
  4. Elektrischer Verbinder (306) nach einem vorherigen Anspruch, wobei die Massekontakte (340-343) auswärts verlaufende Kontakte (340) aufweisen, die von der Montageseite (362) weg verlaufen.
  5. Elektrischer Verbinder (306) nach Anspruch 4, wobei die auswärts verlaufenden Kontakte (340) Biegungsabschnitte (354, 356) aufweisen, die so konfiguriert sind, dass sie sich elastisch in Richtung der Montageseite (362) biegen, wenn die auswärts verlaufenden Kontakte (340) in eine elektrische Komponente (308) eingreifen.
  6. Leiterplattenbaugruppe (302), die den elektrischen Verbinder (306) von Anspruch 1 und eine Leiterplatte (308) mit einer Eingriffsseite (314) umfasst, wobei die Leiterplatte (308) Signaldurchkontaktierungen (382) und Massedurchkontaktierungen (390) aufweist, wobei die Erdungsmatrix (310) zwischen der Eingriffsseite (314) und der Montageseite (362) positioniert ist und wobei die durch die Öffnungen (350) verlaufenden Signalkontakte (340-343) des elektrischen Verbinders (306) in die Signaldurchkontaktierungen (382) eingreifen und die Massekontakte (340-343) die Massedurchkontaktierungen (390) der Leiterplatte (308) elektrisch mit einem Massepfad durch den elektrischen Verbinder (306) verbinden.
  7. Leiterplattenbaugruppe (302) nach Anspruch 6, wobei die Leiterplatte (308) eine leitende Schicht (388) aufweist, die entlang der Eingriffsseite (314) exponiert ist, wobei die leitende Schicht (388) mit den Massedurchkontaktierungen (390) gekoppelt ist, wobei die Massekontakte (340-343) so konfiguriert sind, dass sie mindestens in die leitende Schicht (388) und/oder in die Massedurchkontaktierungen (390) eingreifen.
  8. Leiterplattenbaugruppe nach Anspruch 7, wobei die Leiterplatte (308) eine Maskenschicht (386) aufweist, wobei die Maskenschicht (386) Abschnitte der leitenden Schicht (388) bedeckt, so dass exponierte Kontaktbereiche (394) der leitenden Schicht (388) entlang der Eingriffsseite (314) ausgebildet sind, wobei die Massekontakte (340-343) der Erdungsmatrix (310) in die Kontaktbereiche (394) der leitenden Schicht (388) eingreifen.
  9. Leiterplattenbaugruppe nach Anspruch 6 oder 7, wobei die Massekontakte (340-343) distale Enden (355, 357) aufweisen, die in die leitende Schicht (388) eingreifen und daran entlang gleiten können, wenn der elektrische Verbinder (306) an der Leiterplatte (308) montiert ist.
  10. Leiterplattenbaugruppe (302) nach Anspruch 6, 7, 8 oder 9, wobei die Massekontakte (340-343) Biegungsabschnitte (354, 356) aufweisen, die sich in Richtung der Montageseite (362) des Verbinderkörpers (360) bewegen, wenn die Biegungsabschnitte (354, 356) zwischen der Montageseite (362) und der Eingriffsseite (314) der Leiterplatte (308) komprimiert werden.
EP14171032.7A 2013-06-05 2014-06-03 Elektrischer Verbinder und Leiterplattenanordnung damit Not-in-force EP2811589B1 (de)

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US13/910,670 US8888531B2 (en) 2011-10-11 2013-06-05 Electrical connector and circuit board assembly including the same

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EP2811589B1 true EP2811589B1 (de) 2016-08-24

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TWI797094B (zh) * 2016-10-19 2023-04-01 美商安芬諾股份有限公司 用於非常高速、高密度電性互連的順應性屏蔽件
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