EP0028187B1 - Pluggable-board support with electrical and thermal connection - Google Patents

Pluggable-board support with electrical and thermal connection Download PDF

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Publication number
EP0028187B1
EP0028187B1 EP80401490A EP80401490A EP0028187B1 EP 0028187 B1 EP0028187 B1 EP 0028187B1 EP 80401490 A EP80401490 A EP 80401490A EP 80401490 A EP80401490 A EP 80401490A EP 0028187 B1 EP0028187 B1 EP 0028187B1
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EP
European Patent Office
Prior art keywords
card
thermal
electrical
support
common plane
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.)
Expired
Application number
EP80401490A
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German (de)
French (fr)
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EP0028187A1 (en
Inventor
Bruno Seytre
Henri Bricaud
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.)
Socapex SA
Original Assignee
Socapex SA
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
Application filed by Socapex SA filed Critical Socapex SA
Publication of EP0028187A1 publication Critical patent/EP0028187A1/en
Application granted granted Critical
Publication of EP0028187B1 publication Critical patent/EP0028187B1/en
Expired legal-status Critical Current

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    • 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
    • H01R12/7005—Guiding, mounting, polarizing or locking means; Extractors

Definitions

  • the present invention relates to a support for a plug-in card with electrical and thermal connection, comprising a common flat base carrying at least one connector in the form of a bar provided with a groove for receiving an edge of the card, the internal faces of a groove arranged opposite, carrying on the one hand electrical contacts and on the other thermal contacts in connection with a cooling member.
  • Printed cards used in plug-in circuits use increasingly large electrical powers and the problem of heat dissipation of the heat produced by the Joule effect arises.
  • the support according to the invention proposes to solve the problem posed by the evacuation of the calories generated by the circuits with high heat dissipation which are arranged on printed boards provided with a thermal drain as described in the German application cited above. .
  • the support for a plug-in card is characterized in that the connecting element is a thermal conductor supported by the bar and in that the cooler organ is formed by the plan comman base.
  • Fig. 1 shows a support with electrical and thermal connection, of known type, for circuit on card.
  • the support comprises a base 1, on which are fixed connectors in the form of a barrett such as 2.
  • Each bar comprises a groove with two opposite faces, 3 and 4, intended to receive an edge 5 of a circuit on a card 6.
  • One of the faces 3 of the groove is intended to ensure the electrical connection with the electrical circuit 7 carried by the card 6, and carries contact elements such as 8, endowed with elasticity by their material and their shape.
  • the second face 4 of the groove carried by the bar 2 is mobile, and can pivot around the point 9.
  • the card In the open position, it is easy to introduce the card, the position of which is defined by the stops 26 and 11, and the closed position, as shown in the figure, applies the card to the stop 11, and simultaneously compresses the contact 8 which bends by elasticity thanks to its part 20 and makes the electrical connection with the necessary bearing force.
  • a connection tab 21 allows connection with external circuits.
  • the thermal face 4 of the strip carries thermal contacts such as 22, made of material which is a good conductor of heat, and conveying the thermal energy to be eliminated thanks to a suitable surface section, by a transmission tab such as 23, in relationship with a cooler 24 provided with fins 25, and operating by air convection.
  • Such a connector operates as follows: the two faces 3 and 4 of the bar 2 are movable relative to each other, by rotation about the axis 9. In the phase of placing the card , the connector is open, the face 4 forms an angle which releases the face 3, and the introduction of the card 6 is carried out, positioned transversely by the stop 26.
  • the electrical contact occupies position 27, shown in dashes.
  • the card consists of two superimposed layers, an electrically insulating layer or substrate 6, carrying the electrical circuit 7 and its connection regions, and a layer 28 made of material with good thermal conduction, such as a metal for example, a layer often designated. under the term of thermal drain.
  • the connector closes, as shown in the figure, and the thermal contact 22 is applied to the surface of the drain.
  • the electrical contact 8 is pushed back and takes, by elasticity, the shape shown in solid lines in the figure.
  • the bearing force necessary for good thermal conduction between the drain 28 and the contact 22 is obtained by the elastic force provided by the electrical contact which makes it vis-a-vis.
  • a second stopper II parallel to the direction of installation of the card, fixes the amplitude of this to avoid that, by excessive compression of the contact, the elastic limit is not exceeded.
  • the introduction of the card can be effected by a sliding parallel to the grooves, or a translation perpendicular to the latter.
  • This support of known type is not satisfactory for the evacuation of the calories generated by circuits with high heat dissipation.
  • Fig. 2 shows an embodiment of the support of the invention, with conduction cooling.
  • the card is put in place by a translational movement perpendicular to the plane of the card.
  • the external part 30 of the cooler no longer has fins, and it only assumes the function of thermal conduction, in the direction of the arrows such as 31 from the thermal drain 28, towards the base 1, comprising an insulating layer 33 and a thermal drain base 34, made of thermally good conductive material.
  • a fixing means such as screws 35 ensures satisfactory obtaining of the two desired types of contact.
  • the thermal drain 28 of the card 6 is directed upwards in the figure, the thermal contacts of the support according to the invention also being arranged on the top, so that there is an evacuation of the calories present on the thermal drain 28 to the base heat sink 34 via a thermal conductive connecting element 30, said element being supported by the bar 2.
  • the support comprises four bars arranged on the common plane base according to a four-color rectangle.
  • the connector of the invention ensures satisfactory results as described above, it may be advantageous to improve the thermal transmission at the points of contact of departure and arrival of the thermal conductor by interposing a product there. fluid, pasty or plastic, based on silicones for example, in 36 and 37, which dispenses with too precise surface machining between the corresponding contact regions.

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Multi-Conductor Connections (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)

Description

La présente invention concerne un support pour carte enfichable à reccordement électrique et thermique, comportant un socle plan commun portant au moins un connecteur en forme de barrette munie d'une rainure pour la réception d'un bord de la carte, les faces internes d'une rainure disposées en vis-à-vis, portant d'une part des contacts électriques et d'autre part des contacts thermiques en liaison avec un organe refroidisseur.The present invention relates to a support for a plug-in card with electrical and thermal connection, comprising a common flat base carrying at least one connector in the form of a bar provided with a groove for receiving an edge of the card, the internal faces of a groove arranged opposite, carrying on the one hand electrical contacts and on the other thermal contacts in connection with a cooling member.

Les cartes imprimées utilisées dans les circuits enfichables mettent en oeuvre des puissances électriques de plus en plus grandes et le problème de la dissipation thermique de l'ener- gie calorifique dégagée par effect Joule se pose.Printed cards used in plug-in circuits use increasingly large electrical powers and the problem of heat dissipation of the heat produced by the Joule effect arises.

Il est connu de l'article »Full semi-conductor wafer package« de R. H. A. WATSON publié dans la revue IBM TECHNICAL, DISCLOSURE BULLETIN volume 18, No. 3, août 1975 page 642 de réaliser des embases pour semi-conducteurs comportant une pluralité de contacts électriques élastiques supportant une pastille semi-conductrice et la maintenant au contact d'un capot ayant de bonnes propriétés de dissipation thermique. Un tel support est toutefois limité au point de vue dissipation thermique du fait de la surface relativement faible du capot de l'embase.It is known from the article "Full semi-conductor wafer package" by RHA WATSON published in the journal IBM TECHNICAL, DISCLOSURE BULLETIN volume 18, No. 3, August 1975 page 642 to make semiconductor sockets comprising a plurality of elastic electrical contacts supporting a semiconductor wafer and keeping it in contact with a cover having good heat dissipation properties. Such a support is however limited from the point of view of heat dissipation due to the relatively small surface area of the cover of the base.

Pour les applications à plus forte dissipation thermique telles que celles résultant de l'utilisation de cartes imprimées revêtues d'un grand nombre de composants à haute dissipation thermique, il a été proposé dans DE-A-19 65 851 de munir les cartes imprimées d'un drain thermique assemblé avec le circuit imprimé, ledit drain thermique étant relié à un chassis extérieur par l'intermédiaire d'une glissière métallique assurant l'évacuation des calories du drain thermique vers le chassis muni d'éléments de refroi-disse- ment par convection.For applications with higher heat dissipation such as those resulting from the use of printed boards coated with a large number of components with high heat dissipation, it has been proposed in DE-A-19 65 851 to provide printed boards with '' a heat sink assembled with the printed circuit, said heat drain being connected to an external chassis by means of a metal slide ensuring the evacuation of heat from the heat drain to the chassis provided with cooling elements by convection.

Le support selon l'invention se propose de résoudre le problème posé par l'évacuation des calories engendrées par les circuits à haute dissipation calorifique qui sont disposés sur des cartes imprimées munies d'un drain thermique telles que décrites dans la demande allemande citée plus haut.The support according to the invention proposes to solve the problem posed by the evacuation of the calories generated by the circuits with high heat dissipation which are arranged on printed boards provided with a thermal drain as described in the German application cited above. .

Selon l'invention, le support pour carte enfichable est caractérisé en ce que l'élément de liaison est un conducteur thermique supporté par la barrette et en ce que l'orgâne refroidisseur est constitué pâr le socle plân comman.According to the invention, the support for a plug-in card is characterized in that the connecting element is a thermal conductor supported by the bar and in that the cooler organ is formed by the plan comman base.

L'invention sera mieux comprise à l'aide de la description ciaprès, en s'appuyant sur les figures annexées, où:

  • - la fig. 1 représente un support à connexion électrique et thermique, de type connu, pour circuit sur carte,
  • - la fig. 2 représente un support selon l'invention, à refroidissement par conduction.
The invention will be better understood with the aid of the description below, based on the appended figures, where:
  • - fig. 1 represents a support with electrical and thermal connection, of known type, for circuit on card,
  • - fig. 2 shows a support according to the invention, with conduction cooling.

La Fig. 1 représente un support à connexion électrique, et thermique, de type connu, pour circuit sur carte.Fig. 1 shows a support with electrical and thermal connection, of known type, for circuit on card.

Le support comporte une base 1, sur laquelle sont fixés des connecteurs en forme de barrett tels que 2. Chaque barrete comprend une rainure avec deux faces en vis-à-vis, 3 et 4, destinée à recevoir un bord 5 d'un circuit sur carte 6. Une des faces 3 de la rainure est destinée à assurer le raccordement électrique avec le circuit électrique 7 porté par la carte 6, et porte des éléments de contacts tels que 8, dotés d'élasticité par leut matériau et leur forme.The support comprises a base 1, on which are fixed connectors in the form of a barrett such as 2. Each bar comprises a groove with two opposite faces, 3 and 4, intended to receive an edge 5 of a circuit on a card 6. One of the faces 3 of the groove is intended to ensure the electrical connection with the electrical circuit 7 carried by the card 6, and carries contact elements such as 8, endowed with elasticity by their material and their shape.

Pour réaliser la mise en place d'une carte dans le support, la seconde face 4 de la rainure portée par la barrette 2 est mobile, et peut pivoter autour du point 9. En position d'ouverture, il est aisé d'introduire la carte, dont la position est définie par les butées 26 et 11, et la position de fermeture, telle que représentée sur la figure, applique la carte sur la butée 11, et simultanément comprime le contact 8 qui se courbe par élasticité grâce à sa partie 20 et réalise le raccordement électrique avec la force d'appui nécessaire. Une »patte« de connexion 21 permet le raccordement avec des circuits extérieurs. La face thermique 4 de la barrette porte des contacts thermiques tels que 22, réalisés en matériau bon conducteur de la chaleur, et acheminant l'énergie thermique à éliminer grâce à une section de surface convenable, par une patte de transmission telle que 23, en relation avec un refroidisseur 24 muni d'ailettes 25, et fonctionnant par convection dans l'air.To carry out the positioning of a card in the support, the second face 4 of the groove carried by the bar 2 is mobile, and can pivot around the point 9. In the open position, it is easy to introduce the card, the position of which is defined by the stops 26 and 11, and the closed position, as shown in the figure, applies the card to the stop 11, and simultaneously compresses the contact 8 which bends by elasticity thanks to its part 20 and makes the electrical connection with the necessary bearing force. A connection tab 21 allows connection with external circuits. The thermal face 4 of the strip carries thermal contacts such as 22, made of material which is a good conductor of heat, and conveying the thermal energy to be eliminated thanks to a suitable surface section, by a transmission tab such as 23, in relationship with a cooler 24 provided with fins 25, and operating by air convection.

Un tel connecteur fonctionne de la façon suivante: les deux faces 3 et 4 de la barrette 2 sont mobiles l'une par rapport à l'autre, par rotation autour de l'axe 9. Dans la phase de mise en place de la carte, le connecteur est ouvert, la face 4 forme un angle qui dégage la face 3, et l'introduction de la carte 6 est effectuée, positionnée transversalement par la butée 26.Such a connector operates as follows: the two faces 3 and 4 of the bar 2 are movable relative to each other, by rotation about the axis 9. In the phase of placing the card , the connector is open, the face 4 forms an angle which releases the face 3, and the introduction of the card 6 is carried out, positioned transversely by the stop 26.

Le contact électrique occupe la position 27, représentée en tirets. La carte est constituée de deux couches superposées, une couche ou substrat électriquement isolant 6, portant le circuit électrique 7 et ses régions de raccordement, et une couche 28 en matériau à bonne conduction termique, tel qu'un métal par exemple, couche souvent désignée sous le terme de drain thermique. Dans la phase de raccordement, le connecteur se ferme, comme représenté sur la figure, et le contact thermique 22 s'applique sur la surface du drain. Simultanément, le contact électrique 8 est repoussé et prend par élasticité, la forme représentée en traits continus sur la figure.The electrical contact occupies position 27, shown in dashes. The card consists of two superimposed layers, an electrically insulating layer or substrate 6, carrying the electrical circuit 7 and its connection regions, and a layer 28 made of material with good thermal conduction, such as a metal for example, a layer often designated. under the term of thermal drain. In the connection phase, the connector closes, as shown in the figure, and the thermal contact 22 is applied to the surface of the drain. Simultaneously, the electrical contact 8 is pushed back and takes, by elasticity, the shape shown in solid lines in the figure.

Par un choix convenable de la forme, des dimensions et du matériau du contact électrique, la force d'appui nécessaire à une bonne conduction thermique entre le drain 28 et le contact 22 est obtenue par la force élastique procurée par le contact électrique qui lui fait vis-à-vis.By a suitable choice of shape, dimensions and material of the electrical contact, the bearing force necessary for good thermal conduction between the drain 28 and the contact 22 is obtained by the elastic force provided by the electrical contact which makes it vis-a-vis.

Une seconde butée II, parallèle à la direction de mise en place de la carte, fixe l'amplitude de celle-ci pour éviter que, par une compression excessive du contact, la limite d'élasticité ne soit franchie.A second stopper II, parallel to the direction of installation of the card, fixes the amplitude of this to avoid that, by excessive compression of the contact, the elastic limit is not exceeded.

Suivant le nombre de barrettes utilisées, l'introduction de la carte peut s'effecteur par un glissement parallèle aux rainures, ou une translation perpendiculairement à celles-ci. Ce support de type connu n'est pas satisfaisant pour l'évacuation des calories engendrées par des circuits à haute dissipation calorifique.Depending on the number of bars used, the introduction of the card can be effected by a sliding parallel to the grooves, or a translation perpendicular to the latter. This support of known type is not satisfactory for the evacuation of the calories generated by circuits with high heat dissipation.

La fig. 2 représente un mode de réalisation du support de l'invention, à refroidissement par conduction.Fig. 2 shows an embodiment of the support of the invention, with conduction cooling.

Suivant ce mode particulièrement adapté au cas des cartes à dégagement thermique élevé, on substitue, à la mise en oeuvre de la convection dans l'air, celle de la conduction dans une base de grandes dimensions.According to this mode particularly suitable for the case of cards with high thermal release, the implementation of convection in the air is substituted for that of conduction in a large base.

La mise en place de la carte s'effectue par un mouvement de translation perpendiculaire au plan de la carte.The card is put in place by a translational movement perpendicular to the plane of the card.

Le contact thermique avec celle-ci et saforce d'appui résultent dans ce cas encore, de la force élastique du contact électrique 8.The thermal contact therewith and its supporting force again result, in this case, from the elastic force of the electrical contact 8.

La partie extérieure 30 du refroidisseur ne comporte plus d'ailettes, et elle assume uniquement la fonction de conduction thermique, dans le sens des flèches telles que 31 du drain thermique 28, vers la base 1, comportant une couche isolante 33 et un drain thermique de base 34, en matériau thermiquement bon conducteur.The external part 30 of the cooler no longer has fins, and it only assumes the function of thermal conduction, in the direction of the arrows such as 31 from the thermal drain 28, towards the base 1, comprising an insulating layer 33 and a thermal drain base 34, made of thermally good conductive material.

Après mise en place de la carte et de la face thermique de la barrette, un moyen de fixation tel que des vis 35, assure une obtention satisfaisante des deux types de contact désirés.After the card and the thermal face of the bar have been put in place, a fixing means such as screws 35 ensures satisfactory obtaining of the two desired types of contact.

Le drain thermique 28 de la carte 6 est dirigé vers le haut sur la figure, les contacts thermiques du support selon l'invention étant également disposés sur le dessus, de sorte qu'il s'établit une évacuation des calories présentes dur le drain thermique 28 vers le drain thermique de base 34 par l'intermédiaire d'un élément de liaison 30 conducteur thermique, ledit élément étant supporté par la barrette 2.The thermal drain 28 of the card 6 is directed upwards in the figure, the thermal contacts of the support according to the invention also being arranged on the top, so that there is an evacuation of the calories present on the thermal drain 28 to the base heat sink 34 via a thermal conductive connecting element 30, said element being supported by the bar 2.

Suivant un mode particulier de réalisation du support selon l'invention, le support comporte quatre barrettes disposées sur le socle plan commun suivant un quadri la tére rectangle.According to a particular embodiment of the support according to the invention, the support comprises four bars arranged on the common plane base according to a four-color rectangle.

Bien que le connecteur de l'invention assure des résultats satisfaisants tel qu'il a été décrit plus haut, il peut être avantageux d'améliorer la transmission thermique aux points de contact de départ et d'arrivée du conducteur thermique en y interposant un produit fluide, pâteux ou plastique, à base de silicones par exemple, en 36 et 37, qui dispense d'un usinage de surface trop précis entre les régions de contact correspondantes.Although the connector of the invention ensures satisfactory results as described above, it may be advantageous to improve the thermal transmission at the points of contact of departure and arrival of the thermal conductor by interposing a product there. fluid, pasty or plastic, based on silicones for example, in 36 and 37, which dispenses with too precise surface machining between the corresponding contact regions.

On doit faire remarquer, en terminant, que, bien que la description précédente ait été faite dans le cas d'une carte 6 comportant un drain thermique 28, les expériences et mesures effectuées par la demanderesse ont montré que le refroidissement recherché était obtenu, dans des condictions satisfaisantes avec des cartes à simple substrat en matériau céramique dénommées »chip carrier«, rendant plus général le domaine d'application du support à connecteur électrique et thermique de l'invention.It should be noted, in conclusion, that, although the previous description was made in the case of a card 6 comprising a heat sink 28, the experiments and measurements carried out by the applicant have shown that the desired cooling was obtained, in satisfactory conditions with cards with a single substrate made of ceramic material called "chip carrier", making the field of application of the support with electrical and thermal connector of the invention more general.

Claims (4)

1. Support for an insertable card for electrical and thermal connection, comprising a common plane base (1) carrying at least one connector in the form of a strip (2) provided with a groove for the reception of an edge (5) of the card (6), the inner faces of a groove, disposed opposite each other, carrying on the one hand electrical contacts (8) and on the other thermal contacts (22) in connection with a cooling element, characterized in that the connecting element (30) is a heat conductor carried by the strip (2) and that the cooling element is formed by the common plane base (1).
2. Support according to claim 1, characterized in that the insertable card (6) comprises a heat drain (28) on which the connecting element (30) in thermal contact with a base heat drain (34) of the common plane base (1) bears.
3. Support according to claim 1 or 2, characterized in that the application force between the card (6) and the thermal contacts (22) of the cooling element is ensured by the engagement between the card (6) and the electrical contacts (8) which are resilient.
4. Support according to one of claims 1 to 3, characterized in that the strips are four in number disposed on the common plane base in accordance with a rectangular quadrilateral.
EP80401490A 1979-10-26 1980-10-21 Pluggable-board support with electrical and thermal connection Expired EP0028187B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7926613A FR2469019A1 (en) 1979-10-26 1979-10-26 SUPPORT FOR PLUG-IN CARD WITH ELECTRICAL AND THERMAL CONNECTION
FR7926613 1979-10-26

Publications (2)

Publication Number Publication Date
EP0028187A1 EP0028187A1 (en) 1981-05-06
EP0028187B1 true EP0028187B1 (en) 1984-05-16

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EP80401490A Expired EP0028187B1 (en) 1979-10-26 1980-10-21 Pluggable-board support with electrical and thermal connection

Country Status (6)

Country Link
US (1) US4314311A (en)
EP (1) EP0028187B1 (en)
JP (1) JPS5673500A (en)
CA (1) CA1170780A (en)
DE (1) DE3067879D1 (en)
FR (1) FR2469019A1 (en)

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Also Published As

Publication number Publication date
FR2469019B1 (en) 1983-03-04
FR2469019A1 (en) 1981-05-08
DE3067879D1 (en) 1984-06-20
EP0028187A1 (en) 1981-05-06
JPS5673500A (en) 1981-06-18
CA1170780A (en) 1984-07-10
US4314311A (en) 1982-02-02

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