EP2833482B1 - Contact member between a support and a device and electric connector comprising such a contact member - Google Patents

Contact member between a support and a device and electric connector comprising such a contact member Download PDF

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Publication number
EP2833482B1
EP2833482B1 EP14177867.0A EP14177867A EP2833482B1 EP 2833482 B1 EP2833482 B1 EP 2833482B1 EP 14177867 A EP14177867 A EP 14177867A EP 2833482 B1 EP2833482 B1 EP 2833482B1
Authority
EP
European Patent Office
Prior art keywords
base
contact member
tongue
normal direction
layer
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.)
Active
Application number
EP14177867.0A
Other languages
German (de)
French (fr)
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EP2833482A1 (en
Inventor
Patrice Retho
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.)
Hypertac SA
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Hypertac SA
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Publication date
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Publication of EP2833482A1 publication Critical patent/EP2833482A1/en
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Publication of EP2833482B1 publication Critical patent/EP2833482B1/en
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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
    • 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
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/714—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
    • 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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/245—Contacts for co-operating by abutting resilient; resiliently-mounted by stamped-out resilient contact arm

Definitions

  • the invention also relates to an electrical connector comprising a support and at least one such contact member.
  • the electrical connector is for example an interposer intended to electrically connect two devices comprising electrical circuits.
  • Such contact members must have excellent electrical properties, for example in terms of high frequency signal transmission and low contact resistance.
  • An object of the invention is therefore to provide a contact member for establishing an electrical contact between a support comprising a first electrical circuit and a device comprising a second electrical circuit which is easy to fix on the support, while retaining good electrical properties of signal transmission.
  • the subject of the invention is a contact member according to claim 1.
  • the contact member comprises one or more of the features corresponding to claims 2 to 5.
  • the invention also relates to an electrical connector according to claim 6.
  • the electrical connector comprises one or more of the features corresponding to claims 7 or 8.
  • a connector 1 is described for making an electrical contact between a first device 10 and a second device 20.
  • Such an electrical connector 1 is sometimes called "interposer”.
  • the electrical connector 1 comprises a support 30 extending substantially in a plane P, and a plurality of contact members 32 fixed on the support 30.
  • the support 30 is for example substantially plane. It has a substantially rectangular general shape in projection on the plane P.
  • the general shape of the support 30 is elongate in a first longitudinal direction L1 parallel to the plane P.
  • a normal direction N substantially perpendicular to the plane P is also defined, and a first transverse direction T1 substantially perpendicular to the first longitudinal direction and substantially perpendicular to the normal direction N.
  • the support 30 has a first face 34 ( figure 2 ) intended to be vis-à-vis the first device 10, and a second face 36 opposite the first face 34 in the normal direction N and intended to be vis-à-vis the second device 20.
  • the support 30 is a printed circuit.
  • the support 30 comprises a plate 38 and a first electrical circuit 40.
  • the plate 38 is for example Kapton or FR-4 covered with a copper layer.
  • the copper layer is etched to reveal one or more desired electrical circuits.
  • the first electrical circuit 40 comprises a plurality of reception pads 42 arranged on the first face 34 and the second face 36, for example symmetrically with respect to a median plane P 'of the support 30.
  • the first electrical circuit 40 further comprises a plurality of via 44 extending in the normal direction N.
  • Each via 44 is defined by a hole made in the plate 38, then metallized.
  • the via 44 electrically connect in pairs the reception areas 42 symmetrical with respect to the median plane P '.
  • the reception areas 42 are for example made of tin / lead alloy.
  • the reception areas 42 receive respectively the contact members 32.
  • the reception areas 42 are substantially parallel to the plane P.
  • the reception areas 42 have for example a general shape in "U", the legs of the "U” extending in a second longitudinal direction L2 substantially parallel to the plane P.
  • the reception range 42 has a general shape in "C", or in solid rectangle, or disk.
  • the second longitudinal direction L2 advantageously forms with the first longitudinal direction L1 an angle ⁇ of between 40 ° and 50 °.
  • the angle ⁇ is for example about 45 °.
  • a second transverse direction T2 substantially perpendicular to the second longitudinal direction L2 and substantially perpendicular to the normal direction N.
  • the plurality of contact members 32 define two rows 50, 52 ( figure 1 ) oriented substantially in the first longitudinal direction L1.
  • two additional contact members 32 with respect to the rows 50, 52 are respectively located at two ends of the support 30 in the first longitudinal direction L1.
  • the two additional contact members 32 are substantially equidistant from the two rows 50, 52 in the first transverse direction T1.
  • the contact members 32 being similar to each other, only one of them, located on the first face 34 of the support 30, will be described below with reference to the Figures 4 and 5 .
  • the contact member 32 shown on the Figures 4 and 5 comprises a base 60 extending substantially in the plane P, and at least one tongue 62 integral with the base 60.
  • the base 60 further comprises an orifice 64 in the normal direction N.
  • the base 60 is of generally rectangular shape.
  • the base 60 has a larger dimension D less than or equal to 1 mm, for example between 0.4 and 0.8 mm.
  • the largest dimension D extends along the second longitudinal direction L2.
  • the base 60 comprises a first surface 66 fixed on one of the receiving surfaces 42 of the first face 34 of the support 30, and a second surface 68 opposite the first surface in the normal direction N and located opposite screw of the first device 10.
  • the base 60 further comprises two lateral portions 69 located on either side of the orifice 64 in the second transverse direction T2.
  • the first surface 66 and the second surface 68 are for example substantially parallel to the plane P ( figure 5 ).
  • the second surface 68 includes a gripping surface 70 of generally rectangular or square shape.
  • the gripping surface 70 is located in the base of the "U” formed by the reception zone 42 in projection on the plane P ( figure 4 ).
  • the gripping surface 70 has a short side 72 and a long side 74 ( figure 4 ).
  • the gripping surface extends over at least 0.01 mm 2 .
  • the small side 72 extends for example along the second longitudinal direction L2.
  • the short side 72 has a length D1 greater than or equal to 0.1 mm, preferably greater than or equal to 0.2 mm.
  • the lateral portions 69 of the base 60 are located, in projection on the plane P, in the legs of the "U” formed by the reception area 42.
  • the base 60 has, at any point on the gripping surface 70, a thickness E ( figure 4 ) in the normal direction N less than or equal to 0.25 mm.
  • the tongue 62 protrudes from a first edge 76 of the orifice 64 to a second edge 78 of the orifice 64.
  • the tongue 62 is configured to partially seal the orifice 64 in view in the normal direction NOT.
  • the tongue 62 has a proximal end 79 located, in projection on the plane P, outside the reception range 42.
  • the tongue 62 is intended to be in electrical contact with a second electrical circuit 80 of the first device 10.
  • the tongue 62 of the contact members 32 located on the second face 36 of the support 30 is intended to be in electrical contact with a third electric circuit 81 of the second device 20.
  • the tongue 62 is flexible between a rest position, represented on the Figures 4 and 5 , wherein a distal end 82 of the tongue 62 is located away from the base 60 on the side of the second surface 68 in the normal direction N, and a bent position (not shown) intended to be occupied when the The distal end 82 is in contact with the first device 10 and in which the distal end 82 is closer to the base 60 in the normal direction N than in the rest position.
  • the tongue 62 is adapted so that the distal end 82 moves at least 0.07 mm towards the base 60 in the normal direction N when a force of 0.25 newton is applied to the distal end 82 according to the normal direction N.
  • the distal end 82 of the tongue 62 is located at a distance of about 0.15 mm from the first surface 66 of the base 60 in the normal direction N.
  • the distal end 82 advantageously occupies a substantially central position relative to the base 60 in projection in the normal direction N.
  • the orifice 64 and the tongue 62 define a substantially “U” opening.
  • the base of the "U” is preferably turned towards the gripping surface 70, the tongue 62 forming the interior of the "U”.
  • the tongue 62 In the rest position, the tongue 62 is located away from the reception area 42 on which the contact member 32 is located, so that there is no direct electrical contact between the tongue 62 and the reception range 42.
  • the first edge 76 of the orifice 64 is located on the other side of the second edge 78 with respect to the gripping surface 70 in the second longitudinal direction L2.
  • the base 60 and the tongue 62 form a plate 90 comprising a first layer 92 substantially parallel to the plane (P), a second layer 94 located on the first layer 92 on the side of the second surface 68 of the base 60, and a third layer 96 located on the first layer on the side of the first surface 66.
  • the plate 90 ( figure 5 ) further comprises a first coating 98 forming the second surface 68, and a second coating 100 forming the first surface.
  • the first layer 92 is composed of a metal alloy comprising copper at least 50% by mass.
  • the second layer 94 and the third layer 96 comprise nickel or a nickel alloy, at least 50% by weight.
  • the first coating 98 is composed of gold, or a gold alloy at least 90% by weight.
  • the second coating 100 is composed of tin, or a tin alloy at least 40% by weight, or gold, or a gold alloy at least 90% by weight.
  • the connector 1 is interposed between the first device 10 and the second device 20 ( figure 2 ).
  • the contact members 32 located on the first face 34 of the support 30 are in electrical contact with the second circuit 80 by their tongue 62.
  • the contact members 32 located on the second face 36 are brought into contact with the third circuit 81 by their tongue 62.
  • the electrical contact between the second electrical circuit 80 and the third electrical circuit is successively by the tongue 62 of one of the contact members 32 located on the first face 34 of the support 30, then by the base 60 of said contact member 32 , then by the reception area 42 on which is fixed said contact member 32, then by one of via 44 ( figure 3 ), then by the reception area 42 located on the second face 36 of the support 30 and symmetrical to the preceding one with respect to the plane P ', then by the base 60 of the contact member 32 situated on the second face 36 and symmetrical of the preceding relative to the plane P ', and finally by the tongue 62 of this contact member 32.
  • a first step is to produce a large plate (not shown) to be cut to form the plate 90.
  • a layer equivalent to the second layer 94 and a layer equivalent to the third layer 96 are deposited on an equivalent layer at the first layer 92.
  • the coatings 98, 100 are then deposited.
  • Orifices are provided in the large plate to define the orifice 64 and the tongue 62 of each contact member 32. Then the large plate is cut so as to form the periphery of the base 60 of several contact members 32.
  • Each tongue 62 is slightly twisted at its proximal end 79 to put each tongue 62 in the home position.
  • the deposition of the coatings 98, 100 takes place after the cutting of each contact member 32.
  • the manufacture of the support 30 is known per se and will not be described in detail.
  • the contact members 32 are placed on the receiving surfaces 42 by means of a suction nozzle (not shown) which is applied on the gripping surface 70. By a suction effect, the contact member 32 stay glued to the end of the suction nozzle. The contact member 32 is then easily placed on the receiving surface 42 by the gripping surface 70 by a displacement of the suction nozzle. Each contact member 32 is then welded to the support 30 by brazing the connector 1 in an oven (not shown) according to a method known per se.
  • the connector 1 is not placed in an oven.
  • Two electrodes (not shown) are placed on the gripping surface 70 to circulate a current in the base 60. This heats the base 60 of the contact member 32 and the receiving area 42 and causes the base 60 to be welded to the reception area 42.
  • the gripping surface 70, the contact member 32, which makes an electrical contact between the support 30 and the first device 10 is easy to place and fix on the support 30, all retaining good electrical properties of signal transmission.
  • the contact member 32 is adapted to very well transmit electrical signals up to a frequency of 18 GHz.
  • the electrical resistance measured between the distal ends 82 of two tabs 62 belonging to two contact members 32 facing each other in the normal direction N is advantageously less than 20 m ⁇ .

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Description

La présente invention concerne un organe de contact destiné à établir un contact électrique entre un support comportant un premier circuit électrique et un premier dispositif comportant un deuxième circuit électrique, l'organe de contact comprenant :

  • une embase s'étendant sensiblement selon un plan et comportant une première surface destinée à être fixée sur le support, et une deuxième surface opposée à la première surface selon une direction normale sensiblement perpendiculaire audit plan, la deuxième surface étant destinée à se situer en vis-à-vis du premier dispositif, et
  • au moins une languette solidaire de l'embase et destinée à être en contact électrique avec le deuxième circuit électrique, la languette étant flexible entre une position de repos, dans laquelle une extrémité distale de la languette est située à l'écart de l'embase du côté de la deuxième surface selon la direction normale, et une position fléchie destinée à être occupée lorsque la languette est en contact avec le premier dispositif et dans laquelle l'extrémité distale est plus proche de l'embase selon la direction normale que dans la position de repos.
The present invention relates to a contact member for establishing an electrical contact between a support comprising a first electrical circuit and a first device comprising a second electrical circuit, the contact element comprising:
  • a base extending substantially in a plane and having a first surface to be fixed on the support, and a second surface opposite the first surface in a normal direction substantially perpendicular to said plane, the second surface being intended to be located in a screw to the first device, and
  • at least one tab integral with the base and intended to be in electrical contact with the second electrical circuit, the tongue being flexible between a rest position, in which a distal end of the tongue is located away from the base on the side of the second surface in the normal direction, and a bent position intended to be occupied when the tongue is in contact with the first device and in which the distal end is closer to the base in the normal direction than in the rest position.

L'invention concerne également un connecteur électrique comprenant un support et au moins un tel organe de contact.The invention also relates to an electrical connector comprising a support and at least one such contact member.

Le connecteur électrique est par exemple un interposeur destiné à connecter électriquement deux dispositifs comportant des circuits électriques.The electrical connector is for example an interposer intended to electrically connect two devices comprising electrical circuits.

De tels organes de contact doivent posséder d'excellentes propriétés électriques, par exemple en termes de transmission de signaux à haute fréquence et en termes de faible résistance de contact.Such contact members must have excellent electrical properties, for example in terms of high frequency signal transmission and low contact resistance.

On observe en outre une tendance à la miniaturisation de tels organes de contact. Toutefois, compte tenu de cette miniaturisation, la fixation de tels organes de contact en sur le support est de plus en plus délicate.There is also a tendency to miniaturize such contact members. However, given this miniaturization, the attachment of such contact members on the support is increasingly difficult.

Selon son abrégé DE 102012216525 A1 décrit un connecteur comportant une partie de contact contre un composant électronique de type carte.According to his abstract DE 102012216525 A1 discloses a connector having a contact portion against a card-type electronic component.

Un but de l'invention est donc de proposer un organe de contact destiné à établir un contact électrique entre un support comportant un premier circuit électrique et un dispositif comportant un deuxième circuit électrique qui soit facile à fixer sur le support, tout en conservant de bonnes propriétés électriques de transmission des signaux.An object of the invention is therefore to provide a contact member for establishing an electrical contact between a support comprising a first electrical circuit and a device comprising a second electrical circuit which is easy to fix on the support, while retaining good electrical properties of signal transmission.

A cet effet, l'invention a pour objet un organe de contact selon la revendication 1.For this purpose, the subject of the invention is a contact member according to claim 1.

Selon des modes particuliers de réalisation, l'organe de contact comprend l'une ou plusieurs des caractéristiques correspondant aux revendications 2 à 5.According to particular embodiments, the contact member comprises one or more of the features corresponding to claims 2 to 5.

L'invention concerne aussi un connecteur électrique selon la revendication 6.The invention also relates to an electrical connector according to claim 6.

Selon des modes particuliers de réalisation, le connecteur électrique comprend l'une ou plusieurs des caractéristiques correspondant aux revendications 7 ou 8.According to particular embodiments, the electrical connector comprises one or more of the features corresponding to claims 7 or 8.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :

  • la figure 1 est une vue de face d'un connecteur selon l'invention ;
  • la figure 2 est une vue de profil du connecteur représenté sur la figure 1 ;
  • la figure 3 est une vue de détail de l'extrémité supérieure du connecteur représenté sur la figure 2 ;
  • la figure 4 est une vue de face d'un organe de contact et d'une plage de réception du support représenté sur les figures 1 à 3 ; et
  • la figure 5 est une vue de profil de l'organe de contact représenté sur la figure 4.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which:
  • the figure 1 is a front view of a connector according to the invention;
  • the figure 2 is a profile view of the connector shown on the figure 1 ;
  • the figure 3 is a detail view of the upper end of the connector shown on the figure 2 ;
  • the figure 4 is a front view of a contact member and a reception range of the support shown on the Figures 1 to 3 ; and
  • the figure 5 is a profile view of the contact member shown on the figure 4 .

En référence aux figures 1 et 2, on décrit un connecteur 1 destiné à établir un contact électrique entre un premier dispositif 10 et un second dispositif 20. Un tel connecteur électrique 1 est parfois appelé « interposeur ».With reference to Figures 1 and 2 , a connector 1 is described for making an electrical contact between a first device 10 and a second device 20. Such an electrical connector 1 is sometimes called "interposer".

Le connecteur électrique 1 comprend un support 30 s'étendant sensiblement selon un plan P, et une pluralité d'organes de contact 32 fixés sur le support 30.The electrical connector 1 comprises a support 30 extending substantially in a plane P, and a plurality of contact members 32 fixed on the support 30.

Le support 30 est par exemple sensiblement plan. Il présente une forme générale sensiblement rectangulaire en projection sur le plan P. La forme générale du support 30 est allongée selon une première direction longitudinale L1 parallèle au plan P.The support 30 is for example substantially plane. It has a substantially rectangular general shape in projection on the plane P. The general shape of the support 30 is elongate in a first longitudinal direction L1 parallel to the plane P.

On définit également une direction normale N sensiblement perpendiculaire au plan P, et une première direction transversale T1 sensiblement perpendiculaire à la première direction longitudinale et sensiblement perpendiculaire à la direction normale N.A normal direction N substantially perpendicular to the plane P is also defined, and a first transverse direction T1 substantially perpendicular to the first longitudinal direction and substantially perpendicular to the normal direction N.

Le support 30 possède une première face 34 (figure 2) destinée à être en vis-à-vis du premier dispositif 10, et une seconde face 36 opposée à la première face 34 selon la direction normale N et destinée à être en vis-à-vis du second dispositif 20.The support 30 has a first face 34 ( figure 2 ) intended to be vis-à-vis the first device 10, and a second face 36 opposite the first face 34 in the normal direction N and intended to be vis-à-vis the second device 20.

Selon un mode de réalisation particulier (non représenté), le support 30 est un circuit imprimé.According to a particular embodiment (not shown), the support 30 is a printed circuit.

Comme visible sur la figure 3, le support 30 comprend une plaque 38, et un premier circuit électrique 40.As visible on the figure 3 the support 30 comprises a plate 38 and a first electrical circuit 40.

La plaque 38 est par exemple en Kapton ou en FR-4 recouvert d'une couche de cuivre. La couche de cuivre est gravée pour faire apparaître un ou des circuits électriques souhaités.The plate 38 is for example Kapton or FR-4 covered with a copper layer. The copper layer is etched to reveal one or more desired electrical circuits.

Le premier circuit électrique 40 comprend une pluralité de plages de réception 42 disposées sur la première face 34 et la seconde face 36, par exemple symétriquement par rapport à un plan médian P' du support 30. Dans l'exemple représenté, le premier circuit électrique 40 comprend en outre une pluralité de via 44 s'étendant selon la direction normale N.The first electrical circuit 40 comprises a plurality of reception pads 42 arranged on the first face 34 and the second face 36, for example symmetrically with respect to a median plane P 'of the support 30. In the example shown, the first electrical circuit 40 further comprises a plurality of via 44 extending in the normal direction N.

Chaque via 44 est défini par un perçage réalisé dans la plaque 38, puis métallisé.Each via 44 is defined by a hole made in the plate 38, then metallized.

Les via 44 relient électriquement deux à deux les plages de réception 42 symétriques par rapport au plan médian P'.The via 44 electrically connect in pairs the reception areas 42 symmetrical with respect to the median plane P '.

Les plages de réception 42 sont par exemple en alliage étain/plomb. Les plages de réception 42 reçoivent respectivement les organes de contact 32. Les plages de réception 42 sont sensiblement parallèles au plan P. Les plages de réception 42 présentent par exemple une forme générale en « U », les jambes du « U » s'étendant selon une seconde direction longitudinale L2 sensiblement parallèle au plan P.The reception areas 42 are for example made of tin / lead alloy. The reception areas 42 receive respectively the contact members 32. The reception areas 42 are substantially parallel to the plane P. The reception areas 42 have for example a general shape in "U", the legs of the "U" extending in a second longitudinal direction L2 substantially parallel to the plane P.

Selon des variantes non représentées, la plage de réception 42 présente une forme générale en « C », ou en rectangle plein, ou en disque.According to variants not shown, the reception range 42 has a general shape in "C", or in solid rectangle, or disk.

Comme visible sur la figure 1, la seconde direction longitudinale L2 forme avantageusement avec la première direction longitudinale L1 un angle α compris entre 40° et 50°. L'angle α est par exemple d'environ 45°.As visible on the figure 1 , the second longitudinal direction L2 advantageously forms with the first longitudinal direction L1 an angle α of between 40 ° and 50 °. The angle α is for example about 45 °.

On définit en outre une seconde direction transversale T2 sensiblement perpendiculaire à la seconde direction longitudinale L2 et sensiblement perpendiculaire à la direction normale N.Further defined is a second transverse direction T2 substantially perpendicular to the second longitudinal direction L2 and substantially perpendicular to the normal direction N.

Sur chacune de la première face 34 et de la seconde face 36 du support 30, la pluralité d'organes de contact 32 définissent deux rangées 50, 52 (figure 1) orientées sensiblement selon la première direction longitudinale L1. En outre, deux organes de contact 32 supplémentaires par rapport aux rangées 50, 52 sont situés respectivement à deux extrémités du support 30 selon la première direction longitudinale L1.On each of the first face 34 and the second face 36 of the support 30, the plurality of contact members 32 define two rows 50, 52 ( figure 1 ) oriented substantially in the first longitudinal direction L1. In addition, two additional contact members 32 with respect to the rows 50, 52 are respectively located at two ends of the support 30 in the first longitudinal direction L1.

Les deux organes de contact 32 supplémentaires sont sensiblement à égale distance des deux rangées 50, 52 selon la première direction transversale T1.The two additional contact members 32 are substantially equidistant from the two rows 50, 52 in the first transverse direction T1.

Les organes de contact 32 étant analogues les uns aux autres, seul l'un d'entre eux, situé sur la première face 34 du support 30, sera décrit ci-après en référence aux figures 4 et 5.The contact members 32 being similar to each other, only one of them, located on the first face 34 of the support 30, will be described below with reference to the Figures 4 and 5 .

L'organe de contact 32 représenté sur les figures 4 et 5 comprend une embase 60 s'étendant sensiblement selon le plan P, et au moins une languette 62 solidaire de l'embase 60. L'embase 60 comporte en outre un orifice 64 selon la direction normale N.The contact member 32 shown on the Figures 4 and 5 comprises a base 60 extending substantially in the plane P, and at least one tongue 62 integral with the base 60. The base 60 further comprises an orifice 64 in the normal direction N.

L'embase 60 est de forme générale rectangulaire. L'embase 60 présente une plus grande dimension D inférieure ou égale à 1 mm, par exemple comprise entre 0,4 et 0,8 mm. Par exemple, la plus grande dimension D s'étend selon la seconde direction longitudinale L2.The base 60 is of generally rectangular shape. The base 60 has a larger dimension D less than or equal to 1 mm, for example between 0.4 and 0.8 mm. For example, the largest dimension D extends along the second longitudinal direction L2.

L'embase 60 comporte une première surface 66 fixée sur l'une des plages de réception 42 de la première face 34 du support 30, et une deuxième surface 68 opposée à la première surface selon la direction normale N et située en vis-à-vis du premier dispositif 10.The base 60 comprises a first surface 66 fixed on one of the receiving surfaces 42 of the first face 34 of the support 30, and a second surface 68 opposite the first surface in the normal direction N and located opposite screw of the first device 10.

L'embase 60 comprend en outre deux parties latérales 69 située de part et d'autre de l'orifice 64 selon la seconde direction transversale T2.The base 60 further comprises two lateral portions 69 located on either side of the orifice 64 in the second transverse direction T2.

La première surface 66 et la deuxième surface 68 sont par exemple sensiblement parallèles au plan P (figure 5).The first surface 66 and the second surface 68 are for example substantially parallel to the plane P ( figure 5 ).

La deuxième surface 68 inclut une surface de préhension 70 de forme générale rectangulaire ou carrée.The second surface 68 includes a gripping surface 70 of generally rectangular or square shape.

La surface de préhension 70 se situe dans la base du « U » formé par la plage de réception 42 en projection sur le plan P (figure 4). La surface de préhension 70 possède un petit côté 72 et un grand côté 74 (figure 4). La surface de préhension s'étend sur au moins 0,01 mm2.The gripping surface 70 is located in the base of the "U" formed by the reception zone 42 in projection on the plane P ( figure 4 ). The gripping surface 70 has a short side 72 and a long side 74 ( figure 4 ). The gripping surface extends over at least 0.01 mm 2 .

Le petit côté 72 s'étend par exemple selon la seconde direction longitudinale L2. Le petit côté 72 a une longueur D1 supérieure ou égale à 0,1 mm, de préférence supérieure ou égale à 0,2 mm.The small side 72 extends for example along the second longitudinal direction L2. The short side 72 has a length D1 greater than or equal to 0.1 mm, preferably greater than or equal to 0.2 mm.

Les parties latérales 69 de l'embase 60 sont situées, en projection sur le plan P, dans les jambes du « U » formé par la plage de réception 42.The lateral portions 69 of the base 60 are located, in projection on the plane P, in the legs of the "U" formed by the reception area 42.

L'embase 60 présente, en tout point de la surface de préhension 70, une épaisseur E (figure 4) selon la direction normale N inférieure ou égale à 0,25 mm.The base 60 has, at any point on the gripping surface 70, a thickness E ( figure 4 ) in the normal direction N less than or equal to 0.25 mm.

La languette 62 fait saillie à partir d'un premier bord 76 de l'orifice 64 vers un deuxième bord 78 de l'orifice 64. La languette 62 est configurée de manière à obturer en partie l'orifice 64 en vue selon la direction normale N.The tongue 62 protrudes from a first edge 76 of the orifice 64 to a second edge 78 of the orifice 64. The tongue 62 is configured to partially seal the orifice 64 in view in the normal direction NOT.

La languette 62 comporte une extrémité proximale 79 située, en projection sur le plan P, à l'extérieur de la plage de réception 42.The tongue 62 has a proximal end 79 located, in projection on the plane P, outside the reception range 42.

La languette 62 est destinée à être en contact électrique avec un deuxième circuit électrique 80 du premier dispositif 10. De même, la languette 62 des organes de contact 32 situés sur la seconde face 36 du support 30 est destinée à être en contact électrique avec un troisième circuit électrique 81 du second dispositif 20.The tongue 62 is intended to be in electrical contact with a second electrical circuit 80 of the first device 10. Similarly, the tongue 62 of the contact members 32 located on the second face 36 of the support 30 is intended to be in electrical contact with a third electric circuit 81 of the second device 20.

La languette 62 est flexible entre une position de repos, représentée sur les figures 4 et 5, dans laquelle une extrémité distale 82 de la languette 62 est située à l'écart de l'embase 60 du côté de la deuxième surface 68 selon la direction normale N, et une position fléchie (non représentée) destinée à être occupée lorsque l'extrémité distale 82 est en contact avec le premier dispositif 10 et dans laquelle l'extrémité distale 82 est plus proche de l'embase 60 selon la direction normale N que dans la position de repos.The tongue 62 is flexible between a rest position, represented on the Figures 4 and 5 , wherein a distal end 82 of the tongue 62 is located away from the base 60 on the side of the second surface 68 in the normal direction N, and a bent position (not shown) intended to be occupied when the The distal end 82 is in contact with the first device 10 and in which the distal end 82 is closer to the base 60 in the normal direction N than in the rest position.

La languette 62 est adaptée pour que l'extrémité distale 82 se déplace d'au moins 0,07 mm vers l'embase 60 selon la direction normale N lorsqu'une force de 0,25 newton est appliquée sur l'extrémité distale 82 selon la direction normale N.The tongue 62 is adapted so that the distal end 82 moves at least 0.07 mm towards the base 60 in the normal direction N when a force of 0.25 newton is applied to the distal end 82 according to the normal direction N.

Dans la position de repos, l'extrémité distale 82 de la languette 62 est située à une distance d'environ 0,15 mm de la première surface 66 de l'embase 60 selon la direction normale N. L'extrémité distale 82 occupe avantageusement une position sensiblement centrale par rapport à l'embase 60 en projection selon la direction normale N.In the rest position, the distal end 82 of the tongue 62 is located at a distance of about 0.15 mm from the first surface 66 of the base 60 in the normal direction N. The distal end 82 advantageously occupies a substantially central position relative to the base 60 in projection in the normal direction N.

En vue selon la direction normale N, l'orifice 64 et la languette 62 définissent une ouverture sensiblement en « U ». La base du « U » est avantageusement tournée vers la surface de préhension 70, la languette 62 formant l'intérieur du « U ».In view in the normal direction N, the orifice 64 and the tongue 62 define a substantially "U" opening. The base of the "U" is preferably turned towards the gripping surface 70, the tongue 62 forming the interior of the "U".

Dans la position de repos, la languette 62 est située à l'écart de la plage de réception 42 sur laquelle est situé l'organe de contact 32, de sorte qu'il n'y a pas de contact électrique direct entre la languette 62 et la plage de réception 42.In the rest position, the tongue 62 is located away from the reception area 42 on which the contact member 32 is located, so that there is no direct electrical contact between the tongue 62 and the reception range 42.

Le premier bord 76 de l'orifice 64 est situé de l'autre côté du deuxième bord 78 par rapport à la surface de préhension 70 selon la seconde direction longitudinale L2.The first edge 76 of the orifice 64 is located on the other side of the second edge 78 with respect to the gripping surface 70 in the second longitudinal direction L2.

L'embase 60 et la languette 62 forment une plaque 90 comprenant une première couche 92 sensiblement parallèle au plan (P), une deuxième couche 94 située sur la première couche 92 du côté de la deuxième surface 68 de l'embase 60, et une troisième couche 96 située sur la première couche du côté de la première surface 66.The base 60 and the tongue 62 form a plate 90 comprising a first layer 92 substantially parallel to the plane (P), a second layer 94 located on the first layer 92 on the side of the second surface 68 of the base 60, and a third layer 96 located on the first layer on the side of the first surface 66.

La plaque 90 (figure 5) comprend en outre un premier revêtement 98 formant la deuxième surface 68, et un second revêtement 100 formant la première surface.The plate 90 ( figure 5 ) further comprises a first coating 98 forming the second surface 68, and a second coating 100 forming the first surface.

La première couche 92 est composée d'un alliage métallique comportant du cuivre à au moins 50% en masse.The first layer 92 is composed of a metal alloy comprising copper at least 50% by mass.

La deuxième couche 94 et la troisième couche 96 comportent du nickel ou un alliage de nickel, à au moins 50 % en masse.The second layer 94 and the third layer 96 comprise nickel or a nickel alloy, at least 50% by weight.

Le premier revêtement 98 est composé d'or, ou d'un alliage d'or à au moins 90% en masse.The first coating 98 is composed of gold, or a gold alloy at least 90% by weight.

Le second revêtement 100 est composé d'étain, ou d'un alliage d'étain à au moins 40% en masse, ou d'or, ou d'un alliage d'or à au moins 90% en masse.The second coating 100 is composed of tin, or a tin alloy at least 40% by weight, or gold, or a gold alloy at least 90% by weight.

Le fonctionnement du connecteur 1 et de chaque organe de contact 32 va maintenant être décrit.The operation of the connector 1 and each contact member 32 will now be described.

Le connecteur 1 est interposé entre le premier dispositif 10 et le second dispositif 20 (figure 2). Les organes de contact 32 situés sur la première face 34 du support 30 sont mis en contact électrique avec le deuxième circuit 80 par leur languette 62. De même, les organes de contact 32 situés sur la seconde face 36 sont mis en contact avec le troisième circuit 81 par leur languette 62.The connector 1 is interposed between the first device 10 and the second device 20 ( figure 2 ). The contact members 32 located on the first face 34 of the support 30 are in electrical contact with the second circuit 80 by their tongue 62. Similarly, the contact members 32 located on the second face 36 are brought into contact with the third circuit 81 by their tongue 62.

Lors de la mise en contact électrique, les languettes 62 des organes de contact 32 passent de la position de repos à la position fléchie.When in electrical contact, the tongues 62 of the contact members 32 pass from the rest position to the bent position.

Le contact électrique entre le deuxième circuit électrique 80 et le troisième circuit électrique se fait successivement par la languette 62 d'un des organes de contact 32 situé sur la première face 34 du support 30, puis par l'embase 60 dudit organe de contact 32, puis par la plage de réception 42 sur laquelle est fixée ledit organe de contact 32, puis par l'un des via 44 (figure 3), puis par la plage de réception 42 située sur la seconde face 36 du support 30 et symétrique de la précédente par rapport au plan P', puis par l'embase 60 de l'organe de contact 32 situé sur la seconde face 36 et symétrique du précédent par rapport au plan P', et enfin par la languette 62 de cet organe de contact 32.The electrical contact between the second electrical circuit 80 and the third electrical circuit is successively by the tongue 62 of one of the contact members 32 located on the first face 34 of the support 30, then by the base 60 of said contact member 32 , then by the reception area 42 on which is fixed said contact member 32, then by one of via 44 ( figure 3 ), then by the reception area 42 located on the second face 36 of the support 30 and symmetrical to the preceding one with respect to the plane P ', then by the base 60 of the contact member 32 situated on the second face 36 and symmetrical of the preceding relative to the plane P ', and finally by the tongue 62 of this contact member 32.

Une méthode de fabrication du connecteur 1 va maintenant être décrite.A method of manufacturing connector 1 will now be described.

Une première étape consiste à produire une grande plaque (non représentée) destinée à être découpée pour former la plaque 90. Pour ce faire, une couche équivalente à la deuxième couche 94 et une couche équivalente à la troisième couche 96 sont déposées sur une couche équivalente à la première couche 92.A first step is to produce a large plate (not shown) to be cut to form the plate 90. To do this, a layer equivalent to the second layer 94 and a layer equivalent to the third layer 96 are deposited on an equivalent layer at the first layer 92.

Les revêtements 98, 100 sont alors déposés.The coatings 98, 100 are then deposited.

Des orifices sont ménagés dans la grande plaque pour définir l'orifice 64 et la languette 62 de chaque organe de contact 32. Puis la grande plaque est découpée de façon à former le pourtour de l'embase 60 de plusieurs organes de contact 32.Orifices are provided in the large plate to define the orifice 64 and the tongue 62 of each contact member 32. Then the large plate is cut so as to form the periphery of the base 60 of several contact members 32.

Chaque languette 62 est légèrement tordue au niveau de son extrémité proximale 79 pour mettre chaque languette 62 dans la position de repos.Each tongue 62 is slightly twisted at its proximal end 79 to put each tongue 62 in the home position.

Ceci permet de produire une pluralité d'organes de contact 32 par découpe à partir de la grande plaque.This makes it possible to produce a plurality of contact members 32 by cutting from the large plate.

Selon une variante, le dépôt des revêtements 98, 100 a lieu après la découpe de chaque organe de contact 32.According to one variant, the deposition of the coatings 98, 100 takes place after the cutting of each contact member 32.

La fabrication du support 30 est connue en elle-même et ne sera pas décrite en détail.The manufacture of the support 30 is known per se and will not be described in detail.

Les organes de contact 32 sont placés sur les plages de réception 42 à l'aide d'une buse aspirante (non représentée) qui vient s'appliquer sur la surface de préhension 70. Par un effet de succion, l'organe de contact 32 reste collé au bout de la buse aspirante. L'organe de contact 32 est alors facilement placé sur la plage de réception 42 grâce à la surface de préhension 70 par un déplacement de la buse aspirante. Chaque organe de contact 32 est ensuite soudé sur le support 30 par brasage du connecteur 1 dans un four (non représenté) selon une méthode connue en elle-même.The contact members 32 are placed on the receiving surfaces 42 by means of a suction nozzle (not shown) which is applied on the gripping surface 70. By a suction effect, the contact member 32 stay glued to the end of the suction nozzle. The contact member 32 is then easily placed on the receiving surface 42 by the gripping surface 70 by a displacement of the suction nozzle. Each contact member 32 is then welded to the support 30 by brazing the connector 1 in an oven (not shown) according to a method known per se.

Selon une variante, le connecteur 1 n'est pas placé dans un four. Deux électrodes (non représentées) sont placées sur la surface de préhension 70 pour faire circuler un courant dans l'embase 60. Ceci chauffe l'embase 60 de l'organe de contact 32 et la plage de réception 42 et provoque la soudure de l'embase 60 sur la plage de réception 42.According to a variant, the connector 1 is not placed in an oven. Two electrodes (not shown) are placed on the gripping surface 70 to circulate a current in the base 60. This heats the base 60 of the contact member 32 and the receiving area 42 and causes the base 60 to be welded to the reception area 42.

Grâce aux caractéristiques décrites ci-dessus, en particulier la surface de préhension 70, l'organe de contact 32, qui établit un contact électrique entre le support 30 et le premier dispositif 10, est facile à placer et fixer sur le support 30, tout en conservant de bonnes propriétés électriques de transmission des signaux.Thanks to the features described above, in particular the gripping surface 70, the contact member 32, which makes an electrical contact between the support 30 and the first device 10, is easy to place and fix on the support 30, all retaining good electrical properties of signal transmission.

Notamment, l'organe de contact 32 est adapté pour très bien transmettre des signaux électriques jusqu'à une fréquence de 18 GHz.In particular, the contact member 32 is adapted to very well transmit electrical signals up to a frequency of 18 GHz.

La résistance électrique mesurée entre les extrémités distales 82 de deux languettes 62 appartenant à deux organes de contacts 32 situés en vis-à-vis l'un de l'autre selon la direction normale N est avantageusement inférieure à 20 mΩ.The electrical resistance measured between the distal ends 82 of two tabs 62 belonging to two contact members 32 facing each other in the normal direction N is advantageously less than 20 mΩ.

Claims (8)

  1. A contact member (32) intended for establishing an electrical contact between a substrate (30) having a first electrical circuit (40) and a first device (10) that has a second electrical circuit (80), the contact member (32) comprising of the following:
    - a base (60) extending substantially along a plane (P) and having a first surface (66) intended to be fixed on to the substrate (30), and a second surface (68) opposite the first surface (66) along a normal direction (N) substantially perpendicular to the said plane (P), the second surface (68) being intended to be located face to face with the first device (10), and
    - at least one tongue (62) integrally attached to the base (60) and intended to be in electrical contact with the second electrical circuit (80), the tongue (62) being flexible between a rest position, in which a distal end (82) of the tongue (62) is located at a distance away from the base (60) on the side of the second surface (68) along the normal direction (N), and a flexed position intended to be occupied when the tongue (62) is in contact with the first device (10) and in which the distal end (82) is closer to the base (60) along the normal direction (N) than in the rest position,
    characterised in that:
    - the base (60) is of a larger dimension (D) that is less than or equal to 1 mm, and
    - the second surface (68) includes a gripping surface (70) of generally square or rectangular shape having a short side (72) and a long side (74), the gripping surface (70) extending over at least 0.01 mm2, and the short side (72) having a length (D1) greater than or equal to 0.1 mm, and
    - the base (60) and the tongue (62) are formed from a plate (90) comprising a first layer (92) substantially parallel to the plane (P) and composed of a metal alloy containing copper in a proportion of at least 50% by weight, the plate (90) preferably including a second layer (94) situated on the first layer (92) on the side of the second surface (68), and a third layer (96) situated on the first layer (92) on the side of the first surface (66), the second layer (94) and the third layer (96) containing nickel or a nickel alloy, in a proportion of at least 50% by weight.
  2. The contact member (32) according to claim 1, characterised in that the base (60) presents, at all points of the gripping surface (70), a thickness (E) along the normal direction (N) of less than or equal to 0.25 mm.
  3. The contact member (32) according to claim 1 or 2, characterised in that the plate (90) further comprises a first coating (98) forming the second surface (68), the first coating (98) being composed of gold or a gold alloy in a proportion of at least 90% by weight, the plate (90) preferably having a second coating (100) forming the first surface (66), the second coating (100) being composed of tin or a tin alloy in a proportion of at least 30% by weight, or gold, or a gold alloy in a proportion of at least 90% by weight.
  4. The contact member (32) according to any one of claims 1 to 3, characterised in that the base (60) has an orifice (64), the tongue (62) projecting out from a first edge (76) of the orifice (64) towards a second edge (78) of the orifice (64), the first edge (76) being located on the other side of the second edge (78) relative to the gripping surface (70) along a second longitudinal direction (L2) substantially parallel to the plane (P), the tongue (62) being configured in a manner such as to partially close off the orifice (64) as viewed along the normal direction (N).
  5. The contact member (32) according to claim 4, characterised in that, as viewed along the normal direction (N), the orifice (64) and the tongue (62) define a form that is substantially "U" or "C" shaped, the base of the "U" or "C" being turned towards the gripping surface (70), the tongue (62) defining the interior of the "U" or "C".
  6. An electrical connector (1) comprising a substrate (30) having a first electrical circuit (40), the connector (1) being intended to be connected a first device (10) having a second electrical circuit (80), the connector (1) comprising at least one contact member (32) according to any one of claims 1 to 7, the first surface (66) of the contact member (32) being fixed on to the substrate (30).
  7. The electrical connector (1) according to claim 6, characterised in that the substrate (30) comprises at least one via (44), and a receiving pad (42) substantially parallel to the plane (P) and electrically connected to the via (44), the first surface (66) of the contact member (32) being welded on to the receiving pad (42) at least face to face with the gripping surface (70).
  8. The electrical connector (1) according to claim 7, characterised in that the receiving pad (42) has a general shape of a "U" or "C", the gripping surface (70) of the contact member (32) is situated in the base of the "U" or "C" of the receiving pad (42) as projected on to the plane (P), the two legs of the "U" or "C" are respectively welded on to two lateral portions (69) of the base (60) located on either side of the orifice (64) along a second transverse direction (T2) substantially perpendicular to the normal direction (N).
EP14177867.0A 2013-07-31 2014-07-21 Contact member between a support and a device and electric connector comprising such a contact member Active EP2833482B1 (en)

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FR1357601A FR3009445B1 (en) 2013-07-31 2013-07-31 CONTACT MEMBER BETWEEN A SUPPORT AND A DEVICE AND ELECTRICAL CONNECTOR COMPRISING SUCH A CONTACT MEMBER

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EP (1) EP2833482B1 (en)
JP (1) JP2015032583A (en)
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Also Published As

Publication number Publication date
US9350096B2 (en) 2016-05-24
US20150037987A1 (en) 2015-02-05
FR3009445A1 (en) 2015-02-06
FR3009445B1 (en) 2017-03-31
ES2760701T3 (en) 2020-05-14
EP2833482A1 (en) 2015-02-04
JP2015032583A (en) 2015-02-16

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