Source: https://patents.google.com/patent/EP0693795B1/en
Timestamp: 2019-08-21 20:52:15
Document Index: 501450938

Matched Legal Cases: ['arts 2', 'art 2', 'art 3', 'art 4', 'art 2', 'art 2', 'art 2', 'art 4', 'arts 2', 'art 2', 'art 3', 'art 4', 'arts 2']

EP0693795B1 - Selectively metallizized connector with at least one coaxial or twinaxial terminal - Google Patents
Selectively metallizized connector with at least one coaxial or twinaxial terminal Download PDF
EP0693795B1
EP0693795B1 EP94202142A EP94202142A EP0693795B1 EP 0693795 B1 EP0693795 B1 EP 0693795B1 EP 94202142 A EP94202142 A EP 94202142A EP 94202142 A EP94202142 A EP 94202142A EP 0693795 B1 EP0693795 B1 EP 0693795B1
EP94202142A
EP0693795A1 (en
Bernardus Lambertus F. Paagman
1994-07-22 Application filed by BERG ELECTRONICS Manufacturing, BERG ELECTRONICS MANUFACTURING BV filed Critical BERG ELECTRONICS Manufacturing
1994-07-22 Priority to EP94202142A priority Critical patent/EP0693795B1/en
1994-07-22 Priority claimed from DE1994617224 external-priority patent/DE69417224T2/en
1995-07-17 Priority to US08/503,124 priority patent/US5743765A/en
1996-01-24 Publication of EP0693795A1 publication Critical patent/EP0693795A1/en
1999-03-17 Publication of EP0693795B1 publication Critical patent/EP0693795B1/en
The present invention relates to a connector according to the preamble of claim 1.
Such a connector is known from International Patent Application WO 92/11671. The body of the known connector is constructed from a plurality of plates which comprise recesses which form half of the cavities of the connector accommodating terminals in the assembled state. To assemble the known connector the plates are fixed together by suitable fixing means. All plates are metallized with the exception of areas in the recesses. There are at least as many connector parts to be fixed together as there are columns of terminals of the assembled connector. Therefore the known connector is complex, especially, in applications where many columns are needed. In the known connector all terminals are shielded from external electromagnetic radiation. However, since the recesses accommodating the terminals are not metallized to prevent short-circuits to ground, cross-talk between adjacent terminals, especially those in the same rows, is not prevented which is especially a problem when frequencies are increasing.
In order to prevent cross-talk between adjacent terminals in a connector United States Patent 5,102,353 has disclosed the application of a metal insert having a +-shaped cross-section and which can be inserted between four terminals arranged in two columns of two rows.
In order to provide a shielded twin-ax connection in a connector European Patent Application 0,562,691 discloses a twin-ax insert provided with a separate metal external conductor folded around an insulating body.
Dutch Patent Application 9202301 (EL 6129) discloses the application of S-shaped metal inserts to be inserted in connectors in order to provide a shielding between adjacent terminals in the connectors.
In the connectors known from United States Patent 5,246,385 the application of separate metal inserts to prevent (external) electromagnetic interference is avoided; the connectors known from this Patent are made of different parts some of which are metallized and some of which are not. However, this United States Patent does not disclose connectors in which adjacent terminals are shielded against each other to reduce cross-talk.
Because of the excellent high frequency performance of coaxial and twin-axial connections in connectors their is a need to provide connectors with such connections, however, at the same time under the requirement to reduce manufacturing costs as much as possible.
Therefore, according to the invention a connector as defined in the preamble is characterized by the characterizing portion of claim 1.
By the provision of such a connector cavities are shielded from adjacent cavities. The shielding effectiveness depends upon the specific connector design. The more each cavity is enclosed by metal layers on plastic wall parts the higher the shielding effectiveness. The more miniaturization is required, the higher the required shielding effectiveness will be. The higher the applied frequencies the higher the required shielding effectiveness will be.
In a further embodiment the connecter may comprise a housing provided with adjacent, internally metallized cavities, and insulating sleeves to be inserted into corresponding cavities and to accommodate corresponding terminals. Alternatively, the connector according to the invention may comprise an insulating housing provided with adjacent cavities, and externally metallized sleeves to be inserted into corresponding cavities and to accommodate corresponding terminals.
The connector according to the invention may be made suitable to accommodate at least one twin-ax connection. To that end the connector according to the invention comprises at least one cavity accommodating a twin-ax insert member externally metallized and electrically contacting a ground layer on the connector's surface, which ground layer also electrically contacts at least one ground terminal adjacent to said twin-ax insert member.
Figure 1 shows a connector according to the invention consisting of several housing parts to be inserted into each other;
figure 2 shows the connector according to figure 1 in the assembled state;
figure 3 shows an alternative comb-like third housing part to be used in the connector according to figures 1 and 2;
figure 4 shows the connector according to figures 1 and 2 surface mounted to a substrate;
figure 5 shows an alternative connector according to the invention;
figure 6 shows a further alternative embodiment of a connector according to the invention;
figures 7a and 7b show further alternative connectors according to the invention;
figures 8a and 8b show further alternative connectors according to the invention;
figures 9a to 9c show connectors provided with a twin-ax insert.
In figure 1 a connector according to a first embodiment of the invention is shown. The connector 1 of figure 1 comprises three housing parts 2, 3, 4, each preferably molded from an insulating material. The first housing part 2 can be inserted into the second housing part 3, while the third housing part 4 is a tail cover to protect adjacent columns of terminals 14 of the connector 1. The first housing part 2 comprises a metal layer 11 on its outside surface. The cavities 5 of the first housing part are not coated with any metal layer. In the embodiment shown in figure 1 the first housing part 2 comprises three columns of four rows of cavities 5. Each cavity 5 comprises a terminal 14. Each column of four cavities 5 comprises rims 7 extending from the external surface of the first housing part 2 parallel to the axial direction of the cavities 5. Opposite the rims 7 the intermediate column and the right-hand column comprise recesses 9 extending parallel to the axial direction of each cavity 5.
As shown in figure 1 the terminals 14 can be bent 90° in order to allow a right angle connection to a substrate, printed circuit board or the like (not shown).
To protect adjacent columns of terminals 14 a third housing part 4, having a form of a tail cover or a comb-like structure, may be provided. The tail cover 4 comprises several intermediate walls to be inserted between adjacent columns of terminals 14. The housing parts 2, 3, 4 may each by provided with appropriate extensions and/or recesses to allow connection between these three housing parts. As shown in figure 1 the first housing part 2 is coated with metal layer 11, the second housing part 3 is coated with metal layer 12 and the third housing part 4 is coated with metal layer 15. However, since there may be direct contact between the intermediate walls 16 and the terminals 14, the side surfaces of the walls 16 cannot be metallized since that would cause short circuits.
Figure 2 shows the connector 1 of figure 1 in the assembled state.
In order to reduce cross-talk problems between adjacent columns of terminals 14 at the location of the tail cover 4 the intermediate walls 16 of the tail cover 4 may each be provided with moulded-in plates electrically connected to metal layer 15 connected to ground. This is shown in figure 3. As an alternative, tail cover 4 may entirely be metallized with metal layer 15 also covering the side surfaces of intermediate walls 16 after which these side surfaces of intermediate walls 16, as well as the inner surfaces of the outside walls of tail cover 4 are coated with an insulating layer to prevent short circuits between terminals 14.
Figure 4 shows a connector according to figures 1 and 2 surface mounted to a substrate 22 which may be a printed circuit board (pcb) or a back plane or the like. The connecting ends 13 (figures 1 and 2) are accommodated in appropriate corresponding holes (not shown) in the substrate 22. The substrate 22 is provided with a ground layer 17. Surface mount connection means 21 are provided to form an electrical contact between ground layer 17 and the outside metal layers 11, 12, 15 of the housing parts 2, 3, 4 of connector 1. Suitable surface mount connection means 21 are known to persons skilled in the art and need no further explanation in the present invention.
Instead of the surface mount connection means 21 shown in figure 4, alternatively, press-fit pegs (not shown) mounted on the connector 1 and accommodated in plated holes of the substrate 22 can be used.
Figure 5 shows an alternative embodiment of a connector 23 according to the invention. Connector 23 comprises a housing selectively metallized with metal layer 25. Moreover, connector 23 comprises cavity walls 33 between cavities 32. The cavity walls 33 are provided with additional through-holes 31. The additional through-holes 31 are internally metallized. The dimensions of the cross-sections of the additional through- holes 31 is chosen in such a way that adjacent cavities 32 are only mechanically connected to each other by bridges 46 which are as small as possible. The dimensions of the bridges 46 follow from the overall mechanical requirements of the connector 23. By choosing the bridges 46 as small as possible as high shielding as possible between adjacent cavities is obtained. Each cavity 32 is designed to accommodate a corresponding terminal 29.
The connector 23 is designed to be inserted into a mating connector 24 which is also provided with a metal layer 26 at its surface. In the embodiment shown in figure 5 the connector 23 comprises female terminals 29 while the connector 24 comprises male terminals 30. Of course, connectors according to the invention are not restricted to these types of terminals. Cavities 32 may be provided with male-type terminals, whereas then the connector 24 may be provided with female-type terminals. Alternatively, both connectors 23 and 24 may be provided with hermaphrodite-like terminals (not shown).
Figure 6 shows a further embodiment of the connector according to the invention. The same reference signs used in figures 5 and 6 refer to the same parts of the connectors shown. In addition to not-metallized cavities 32 the connector 23 according to figure 6 also comprises one or more metallized cavities 32'. Besides, connector 24 according to the embodiment of figure 6 comprises several terminals 30' which are connected to the ground metal layer 26 covering connector 24. The metal layer inside the metallized cavities 32' of connector 23 electrically contact metal layer 25 on the outside surface of connector 23. Therefore, those terminals 29 inserted into metallized cavities 32' electrically contact ground.
The embodiments of figures 5 and 6 show cavities 32, 32' having square cross-section dimensions. However, cavities of the connector according to the invention may have any shape of cross-section. Figures 7a, 7b, 8a, and 8b show connectors according to the invention having circular cavities.
Connector 35 according to the embodiment of figure 7a comprises cylindrical cavities 36. The intermediate walls 42 between adjacent cavities 36 comprise additional through-holes 38' which are entirely metallized. Thin bridges 46 mechanically connect adjacent cavities 36. Only at the locations of the thin bridges 46 no electromagnetic shielding is obtained.
Figure 7b shows a connector 40 having cylindrical non-metallized cavities 36 accommodating terminals 37 which may be connected to a cable 39. Each cavity 36 is surrounded by a plurality of cylindrical additional metallized through-holes 41. Additional through-holes 41 have a smaller diameter than the diameter of the cavities 36. The bridges 47 between adjacent cavities 36 are much thicker than the corresponding bridges 46 in figure 7a. This provides for more mechanical stability although cross-talk reduction between terminals in adjacent cavities will be less than in the embodiment according to figures 5, 6, and 7a.
Figures 8a and 8b show connectors 35 provided with coaxial shielded terminals 37. In the embodiment of figure 8a each cavity 36', which may have a circular cross-section, is entirely metallized. To prevent a short circuit to the terminal 37, which may be connected to a cable 39, an insulating sleeve 45 is provided between the side wall of cavity 36' and the terminal 37. As a further shielding measure the housing 34' of connector 35 according to the embodiment of figure 8a may be metallized.
Instead of the metallized connector 35 according to the embodiment of figure 8a also a non-metallized connector 35 according to the embodiment of figure 8b can be used. In that case connector 35 may comprise non-metallized additional holes 38 and a non-metallized housing 34. Then, an externally metallized plastic sleeve 45' is used between the side wall of the cavity 36 and the terminal 37. Note that in the embodiments according to figures 8a and 8b the terminals 37 are entirely surrounded by a metal shielding thus providing for a Faraday cage effect.
Figures 9a to 9c show that the teaching of the present invention can also be used to provide a twin-ax connection within a connector having a plurality of cavities arranged in columns and rows.
The connectors 50 and 53 shown in figure 9a are known as "Autobahn"-connectors having a plurality of cavities arranged in thirty two columns of three rows a, b, c. Connector 50 is a male-type of connector comprising terminal pins 51. Connector 53 is a female-type of connector and comprises female terminals 54. The cavities on the positions b20, b21, b22, b23 have a predetermined purpose: both cavities b20 and b23 do have to comprise ground terminals, whereas both cavities b21 and b22 do have to comprise "Autobahn"-bus terminals.
Figure 9b shows top cross-sections through row b of connectors 50 and 53, respectively. Connector 50 is shown to have ground pins 57 on each of the positions b20 and b23. Connector 53 is shown to have female ground terminals 59 on positions b20 and b23, respectively. On the positions b21 and b22 each of the connectors 50 and 53 comprise one combined large cavity large enough to accommodate a male-type of twin-ax insert 52 or a female-type of twin-ax insert 55, respectively. Both the twin-ax inserts 52 and 55 are made of externally metallized plastic insert members (figure 9c). Connector 50 is provided with a metal layer 56 extending through the cavities on the positions b20 and b23 as well as in the combined cavity on positions b21 and b22, as shown in figure 9b. The ground pins 27 contact the metal layer 56. Also the externally metallized twin-ax insert 52 contacts the metal layer 56. Therefore, the externally metallized twin-ax insert 52 is shielded since its outside metal layer is grounded.
In the present invention the first metal layer subareas mentioned above correspond to those metal layers on the surface of the different plastic members shown in the figures. For instance, in the embodiment according to figure 1 said first metal layer subareas correspond to metal layers 11, 12, and 15.
When the method according to said copending European patent application (BO 39328) is used a high energy beam may be used, for example an electron beam or ion beam to separate the first metal layer subareas from the remaining first metal layer area. A light beam or a laser beam may be used instead, whereas also grinding may be used. Removing any non-selected metal layer areas in step d. referred to above may be done by chemical etching or by grinding processes. The first metal layer may be made of electroless copper or nickel and may have a thickness of 1 to 2 µm. The second thickness referred to above may be 5 to 10 µm. The galvanic metal layer may be coated with a top coat finish layer, for instance, made of nickel, gold, or tin-lead, which finish layer may have a thickness between 2 to µm. For further details as to said method for manufacturing selectively metallized plastic members reference is made to said copending European patent application (BO 39328).
It is to be understood that the embodiments shown in the figures are given by way of example only. The scope of the present invention is only limited by the scope of the annexed claims. For instance, it is observed that the application of a twin-ax insert as shown in figures 9a to 9c is not restricted to connector types shown in figures 9a to 9c. These twin-ax inserts may, for instance, also be applied in connectors as shown in any of the other preceding figures.
Connector provided with at least two adjacent cavities (5, 6) to accommodate terminals (14), the connector having a selectively metallized plastic body in order to produce a shielding effect for at least one predetermined cavity, characterized in that said connector body comprises the following consecutive structures between said predetermined cavity and any of its adjacent cavities at predetermined locations surrounding said predetermined cavity: a first insulating plastic wall extending along the entire length of said predetermined cavity - at least one metal layer extending along the entire length of said predetermined cavity - a second insulating plastic wall extending along the entire length of said predetermined cavity, said at least one metal layer being provided as a coating on said first and/or said second plastic walls.
Connector according to claim 1 characterized in that the connector (1) comprises at least a first (2) and a second (3) housing part, the first housing part (2) comprising at least one cavity (5) to accommodate one terminal (14) and being selectively metallized at the outside surface surrounding said at least one cavity (5), the second housing part (3) comprising at least one further cavity (6) to accommodate one further terminal (14) and being selectively metallized at the outside surface surrounding said at least one further cavity (6), the first (2) and second (3) housing parts being designed in such a way as to be able to be inserted into each other in order to yield said connector comprising at least two adjacent coaxial terminals.
Connector according to claim 2 characterized in that said connector (1) comprises a comb-like third housing part (4) that can be fixed to said first (2) and second (3) housing parts inserted into each other to provide separating walls (16) between adjacent columns of terminals (14) extending from said first (2) and second (3) housing parts inserted into each other.
Connector according to claim 3 characterized in that said separating walls (16) comprise moulded-in plates (20).
Connector according to any of the preceding claims characterized in that said connector (1) is surface mounted to a substrate (22) by means of surface mount connection means (21) connected to both the selectively metallized connector and a ground layer (17) on said substrate (22).
Connector according to claim 1 characterized in that said connector (23; 35; 40) comprises several adjacent cavities (32; 36) to receive terminals (29; 37), said cavities (32; 36) being separated by cavity walls (33; 42; 43) provided with additional, internally metallized through-holes (31; 38; 41) having predetermined cross-sections and surrounding said cavities (32; 36).
Connector according claim 1 characterized in that the connector (35) comprises a housing (34') provided with adjacent, internally metallized cavities (36'), and insulating sleeves (45) to be inserted into corresponding cavities (36') and to accommodate corresponding terminals (37).
Connector according claim 1 characterized in that the connector (35) comprises an insulating housing (34) provided with adjacent cavities (36), and externally metallized sleeves (45') to be inserted into corresponding cavities (36) and to accommodate corresponding terminals (37).
Connector according claim 1 characterized in that the connector (50, 53) comprises at least one cavity accommodating a twin-ax insert member (52, 55) externally metallized and electrically contacting a ground layer (56, 58) on the connector's surface, which ground layer (56, 58) also electrically contacts at least one ground terminal (57, 59) adjacent to said twin-ax insert member (52, 55).
EP94202142A 1994-07-22 1994-07-22 Selectively metallizized connector with at least one coaxial or twinaxial terminal Expired - Lifetime EP0693795B1 (en)
EP94202142A EP0693795B1 (en) 1994-07-22 1994-07-22 Selectively metallizized connector with at least one coaxial or twinaxial terminal
US08/503,124 US5743765A (en) 1994-07-22 1995-07-17 Selectively metallized connector with at least one coaxial or twin-axial terminal
DE1994617224 DE69417224T2 (en) 1994-07-22 1994-07-22 Selectively metallized connector with at least one coaxial or biaxial contact
DE1994617224 DE69417224D1 (en) 1994-07-22 1994-07-22 Selectively metallized connector with at least one coaxial or biaxial contact
KR10-1995-0021282A KR100355731B1 (en) 1994-07-22 1995-07-20 An optionally metallized connector with at least one coaxial or biaxial terminal
JP7187538A JPH08288019A (en) 1994-07-22 1995-07-24 Selectively metallized connector having at least one coaxial or biaxial terminal
EP0693795A1 EP0693795A1 (en) 1996-01-24
EP0693795B1 true EP0693795B1 (en) 1999-03-17
ID=26136444
EP94202142A Expired - Lifetime EP0693795B1 (en) 1994-07-22 1994-07-22 Selectively metallizized connector with at least one coaxial or twinaxial terminal
US (1) US5743765A (en)
EP (1) EP0693795B1 (en)
JP (1) JPH08288019A (en)
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1994-07-22 EP EP94202142A patent/EP0693795B1/en not_active Expired - Lifetime
1995-07-17 US US08/503,124 patent/US5743765A/en not_active Expired - Lifetime
1995-07-24 JP JP7187538A patent/JPH08288019A/en active Pending
CN103918132B (en) * 2011-08-18 2017-08-29 浩亭电子有限公司 An insulator member having a cross-shaped shield
EP0693795A1 (en) 1996-01-24
US5743765A (en) 1998-04-28
JPH08288019A (en) 1996-11-01
EP1427061B1 (en) 2011-04-20 Differential signal electrical connectors
US6171149B1 (en) 2001-01-09 High speed connector and method of making same
KR940011265B1 (en) 1994-12-03 Connectors with ground structure
KR100528941B1 (en) 2005-11-23 Modular shielded connector
1996-04-17 RBV Designated contracting states (correction):
1999-03-10 RAP1 Transfer of rights of an ep published application
Owner name: BERG ELECTRONICS MANUFACTURING B.V.
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