EP1160533A1 - Electro-pyrotechnic initiator having a thin layer ignition bridge and low energy requirement - Google Patents

Electro-pyrotechnic initiator having a thin layer ignition bridge and low energy requirement Download PDF

Info

Publication number
EP1160533A1
EP1160533A1 EP01401108A EP01401108A EP1160533A1 EP 1160533 A1 EP1160533 A1 EP 1160533A1 EP 01401108 A EP01401108 A EP 01401108A EP 01401108 A EP01401108 A EP 01401108A EP 1160533 A1 EP1160533 A1 EP 1160533A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
support
initiator according
thin layer
container
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.)
Granted
Application number
EP01401108A
Other languages
German (de)
French (fr)
Other versions
EP1160533B1 (en
Inventor
Jean-René Duguet
Jean-Pierré Vedel
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.)
Livbag SAS
Original Assignee
Livbag SAS
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 Livbag SAS filed Critical Livbag SAS
Publication of EP1160533A1 publication Critical patent/EP1160533A1/en
Application granted granted Critical
Publication of EP1160533B1 publication Critical patent/EP1160533B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators
    • F42B3/13—Bridge initiators with semiconductive bridge

Definitions

  • the present invention relates to the field of electro-pyrotechnic initiators intended, in particular, to initiate occupant protection systems of a motor vehicle such as for example seat belt tensioners or generators gas to inflate protective cushions. More precisely the invention relates to an electro-pyrotechnic initiator whose resistive heating element is consisting of a thin layer bridge that works with very low energy.
  • electro-pyrotechnic initiators intended for automotive safety were constituted by an insulating body of electricity extended by a fragmentable metal cap and crossed by two electrodes.
  • the electrodes are linked together by a suspended resistive filament heating surrounded by an explosive composition initiation consisting of a primary explosive or a redox mixture as described for example in the US Patent 3,572,247.
  • Such initiators exhibit however the disadvantage of being sensitive to vibrations of the motor vehicle at the welds of the resistive filament on the electrodes. These welds, when they are repeatedly requested by vehicle vibrations, can break and make the inoperative initiator, which means that this technology is gradually being abandoned today.
  • the “all fire” current corresponds to the limit of the intensity of an electric current above which we are sure that all the igniters in a batch will operate.
  • the “no fire” current corresponds to the limit of the intensity of an electric current below which it is certain that no igniter in a batch will work.
  • the object of the present invention is precisely to propose such an initiator.
  • a deposit as a resistive element in a thin layer on a support which is both insulating of electricity and very bad conductor of the heat and by imposing special conditions of particle size with primary explosive present in the priming composition, it is possible to constitute a electro-pyrotechnic initiator which operates from reliably with very low energies, around of a few hundred microjoules and which, when the components are well sized, present currents of all fire and non-fire compatible with the new requirements of car manufacturers.
  • Said electrical circuit and said support will be advantageously constituted by a component, "C.M.S.” mounted on the surface of the solid body.
  • Such components are still known by their abbreviated Anglo-Saxon appellation "S.M.D. (Surface Mounted Device).
  • wedge not conductive of electricity and having two opposite planar faces is glued by one of its faces planes on the planar upper face of said massive body and the other flat face of the hold carries two layers separate conductive metals which are each at contact of one of the two electrodes and on which is fixed, by means of two conductive welds of electricity, the C.M.S.
  • said container and said massive body are held together by a non-overmolding conductor of electricity and which is crossed by two electrodes.
  • the support will consist of a material chosen from the group consisting of silica vitreous, mineral glasses containing silica, organic resins and plastics composites containing at least one organic resin and mineral fibers.
  • said support consists of a material chosen from the group made up of mineral glasses containing silica.
  • the different primary explosives suitable for the condition of grain size expressed above are likely to be used but we prefer, for reasons of operating reliability, use the salts of dinitrobenzofuroxane and in particular the rubidium salt of dinitrobenzofuroxan (RbDNBF) and the potassium salt of dinitrobenzofuroxan (KDNBF).
  • the binder of the priming composition will advantageously be constituted with vinyl or acrylic resin.
  • Said flat resistive element will be advantageously constituted by tantalum nitride.
  • Figure 1 is an axial sectional view of a cylindrical initiator according to the invention.
  • Figure 2 is a top view of the circuit electric by thin film deposition used in the initiator shown in Figure 1.
  • Figure 3 is a partial sectional view of the massive body carrying the wedge and the C.M.S. such used in the initiator shown in Figure 1.
  • FIG. 1 An electro-pyrotechnic initiator 1 according to the invention is shown in Figure 1.
  • This initiator 1 consists of a cylindrical container 2 fragmentable open at one of its ends.
  • a body massive cylindrical 3 closes the open end of the container 2.
  • the side wall 4 of the body 3 has a external shoulder 5 on which the end is supported container 2 open.
  • container 2 and body 3 are enclosed in an overmolding 6 which holds them in solidarity with each other.
  • Container 2 thus has the shape of a cylindrical cap having a wall side 7 and a flat upper wall 8.
  • the container 2 is advantageously constituted by a thin light metal like aluminum and its flat wall 8 is advantageously weakened to be able to open easily due to increased pressure prevailing inside the container.
  • Overmolding 6 is preferably made in a resin thermoplastic such as, for example, terephthalate polyethylene.
  • Body 3 must be able to function as a wall impervious to detonation and combustion gases resulting from this detonation.
  • This body 3 is preferably made of a dense metal such as steel.
  • the body 3 has a flat upper face 9 and a lower face 15 also flat and it encloses over its entire height h, a hollow glass tube 10.
  • Two electrodes 12, 13 in the form of a cylindrical pin pass through the body 3, the electrode 12 passing through it through the hollow glass tube 10.
  • Each electrode has one end that protrudes the planar upper face 9 of the body 3 and one end which exceeds the lower face 14 of the overmolding 6.
  • an insulating shim 16 which is located thus arranged inside the container 2.
  • Wedge 16 is based on charged polyepoxy resin of glass fibers and has the shape of a disc comprising two cylindrical channels intended to let through during the assembly of initiator 1, the electrodes 12 and 13.
  • the wedge 16 carries on its upper face two plies distinct and non-contiguous metallic elements of copper 21 and 22; the upper ends of electrodes 12 and 13 are each connected to one of the layers 21 and 22 at welds 27 and 28 made of an alloy conductor of electricity.
  • a SMD component constituted by a support 26 in the form of a parallelepiped chip, the upper face of which carries an electrical circuit 18.
  • the support 26 consists of an ordinary "flint" glass containing between 20% and 55% silica SiO 2 . Such a glass is an excellent electrical insulator and a very poor conductor of heat, its thermal conductivity being of the order of 6mW / cm ° C.
  • the circuit 18 consists of a deposit 29 in a thin layer of tantalum nitride partially covered by deposits in thin layers 30 and 31 of conductive metals based on gold and palladium. As shown in FIG.
  • the deposits 29, 30 and 31 have trapezoidal shapes which leave uncovered a central parallelepipedal area 17 of the deposit 29 made of tantalum nitride.
  • This zone 17 constitutes the resistive heating element in a thin layer of the electrical circuit 18.
  • a tin solder 32 encloses one of the ends of the support 26 so as to ensure an electrical connection between the conductive deposit 30 and the conductive sheet 22 while a separate solder 33 also made of tin encloses the opposite end of the support 26 so as to ensure an electrical connection between the conductive deposit 31 and the conductive sheet 21.
  • the electrical circuit 18 comprising the resistive heating element 17 is covered by a pyrotechnic initiation composition 23 constituted for 80% of its weight by the rubidium salt of dinitrobenzofuroxane and for 20% of its weight by an epoxy resin acting as a binder .
  • the particle size of the primary explosive RbDNBF was close to 20 ⁇ 10 -6 m.
  • Container 2 also contains a powder ignition 25 consisting, for example, of a powder nitrocellulose base or by a mixture of boron and potassium nitrate.
  • a powder ignition 25 consisting, for example, of a powder nitrocellulose base or by a mixture of boron and potassium nitrate.
  • Such an initiator is particularly simple and economical to mass produce.
  • the wedge 16 thus fitted is glued to the flat upper face 9 of the solid body 3 so as to constitute a head of initiation which is covered by the composition priming 23 before introducing it into container 2 containing the ignition powder 25. It then suffices to join together thanks to overmolding 6.
  • the initiators according to the invention can operate reliably with very low energy, of the order of 100 to 200 micro-joules or even from 1x10 -4 to 2x10 -4 J, and, when their constituent elements and in particular the resistor element 17 are well dimensioned, they have current values of any fire close to 1200mA and non-fire current values greater than 500mA. Furthermore, the initiators with thin film deposits being very resistant to vibrations, the initiators according to the invention find a preferred application in the field of protection, by electro-pyrotechnic devices, of the occupants of a motor vehicle.
  • Initiator No. 1 corresponds to a thick layer bridge initiator, on a non-heat conducting support and with a priming composition using an oxidation-reduction mixture.
  • Initiator No. 2 corresponds to a thick layer bridge initiator, on a non-heat conducting support and with a priming composition using a primary explosive.
  • Initiator # 3 is a thin layer bridge initiator on a heat conducting support with a priming composition using a primary explosive

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Conductive Materials (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Surface Heating Bodies (AREA)

Abstract

The two electrodes of the initiator device are interconnected by two conductive metal layers in the surface of an insulator, with a resistor heating element between the two layers. An electropyrotechnic device comprises : (i) a container with a brittle wall and sealed by a body mass of height h which has an upper plane surface at the interior of the container and is electrically insulating ; (ii) two electrodes in the form of a fork which traverse the solid body ; and (iii) an electric circuit comprising thin layer deposits on a non-conductive support fixed to the upper face. The circuit is connected to the electrodes and comprises a thin layer resistive heating element, and is covered by a pyrotechnic initiator composition. The support has a thermal conductivity less than 20 mW/cm. degrees C. The resistive heating element has a thickness less than 1 x 10<-6> m. The pyrotechnic composition consists of a binder and a primary explosive with a particle size between 1 x 10<-6> and 30 x 10<-6>.

Description

La présente invention se rapporte au domaine des initiateurs électro-pyrotechniques destinés, notamment, à initier des dispositifs de protection des occupants d'un véhicule automobile comme par exemple des rétracteurs de ceinture de sécurité ou des générateurs de gaz devant gonfler des coussins de protection. Plus précisément l'invention concerne un initiateur électro-pyrotechnique dont l'élément résistif chauffant est constitué par un pont en couche mince et qui fonctionne avec une très basse énergie.The present invention relates to the field of electro-pyrotechnic initiators intended, in particular, to initiate occupant protection systems of a motor vehicle such as for example seat belt tensioners or generators gas to inflate protective cushions. More precisely the invention relates to an electro-pyrotechnic initiator whose resistive heating element is consisting of a thin layer bridge that works with very low energy.

Traditionnellement les initiateurs électro-pyrotechniques destinés à la sécurité automobile étaient constitués par un corps isolant de l'électricité prolongé par un capuchon métallique fragmentable et traversé par deux électrodes. Les électrodes sont reliées entre elles par un filament suspendu résistif chauffant entouré par une composition explosive d'amorçage constituée par un explosif primaire ou par un mélange oxydo-réducteur comme décrit par exemple dans le brevet US 3 572 247. De tels initiateurs présentent cependant l'inconvénient d'être sensibles aux vibrations du véhicule automobile au niveau des soudures du filament résistif sur les électrodes. Ces soudures, lorsqu'elles sont sollicitées de manière répétitive par les vibrations du véhicule, peuvent casser et rendre l'initiateur inopérant, ce qui fait que cette technologie est aujourd'hui progressivement abandonnée.Traditionally electro-pyrotechnic initiators intended for automotive safety were constituted by an insulating body of electricity extended by a fragmentable metal cap and crossed by two electrodes. The electrodes are linked together by a suspended resistive filament heating surrounded by an explosive composition initiation consisting of a primary explosive or a redox mixture as described for example in the US Patent 3,572,247. Such initiators exhibit however the disadvantage of being sensitive to vibrations of the motor vehicle at the welds of the resistive filament on the electrodes. These welds, when they are repeatedly requested by vehicle vibrations, can break and make the inoperative initiator, which means that this technology is gradually being abandoned today.

Pour remédier à cet inconvénient on a alors développé une nouvelle catégorie d'initiateurs dans lesquels les électrodes sont connectées à deux nappes métalliques conductrices distinctes étendues sur la surface du corps isolant qui est à l'intérieur du capuchon métallique et entre ces deux nappes on dispose un élément résistif chauffant.To remedy this drawback, we then have developed a new category of initiators in which the electrodes are connected to two layers separate conductive metal stretches across the surface of the insulating body which is inside the metal cap and between these two layers we have a resistive heating element.

Dans cette nouvelle catégorie on peut distinguer deux grandes familles en fonction de l'épaisseur de l'élément résistif chauffant :

  • D'une part, les initiateurs dont les nappes conductrices et la bande résistive sont constituées par des circuits imprimés ou encore par des feuilles « en couches épaisses » photogravées dont l'épaisseur est supérieure à 2x10-6m et souvent comprise entre 2x10-6m et 7x10-6m, ou encore entre 2 et 7 micromètres. De tels initiateurs sont par exemple décrits dans le brevet US 5 544 585. De tels initiateurs ont une bonne résistance aux vibrations du véhicule automobile, mais nécessitent, comme les initiateurs à filament, une énergie relativement importante pour fonctionner.
  • D'autre part, les initiateurs dont la bande résistive est constituée par un dépôt « en couche mince » dont l'épaisseur est inférieure ou égale à 1 x 10-6m ou encore 1 micromètre et qui est déposée par évaporation sous vide sur son support. De tels initiateurs sont par exemple décris dans les brevets US 5 798 476 ou encore US 4 729 315. Ces initiateurs ont une bonne résistance aux vibrations du véhicule automobile et présentent de surcroít l'avantage de présenter un courant de non feu d'au moins 400 mA avec un courant de tout feu voisin de 1200 mA ce qui est de plus en plus demandé par les constructeurs automobiles et qui n'est pas offert par les initiateurs à filament ou à « couches épaisses ».
In this new category, we can distinguish two main families depending on the thickness of the resistive heating element:
  • On the one hand, the initiators whose conductive layers and the resistive strip are formed by printed circuits or by sheets "in thick layers" photoengraved whose thickness is greater than 2 × 10 -6 m and often between 2 × 10 -6 m and 7x10- 6 m, or between 2 and 7 micrometers. Such initiators are for example described in US Pat. No. 5,544,585. Such initiators have good resistance to the vibrations of the motor vehicle, but require, like filament initiators, relatively large energy to operate.
  • On the other hand, the initiators whose resistive strip consists of a “thin layer” deposit whose thickness is less than or equal to 1 × 10 -6 m or even 1 micrometer and which is deposited by vacuum evaporation on its support. Such initiators are for example described in US Patents 5,798,476 or even US 4,729,315. These initiators have good resistance to the vibrations of the motor vehicle and also have the advantage of having a non-fire current of at least 400 mA with a current of any fire close to 1200 mA which is more and more requested by the automobile manufacturers and which is not offered by the initiators with filament or "thick layers".

Il est rappelé à ce propos que :
Le courant de « tout feu » correspond à la limite de l'intensité d'un courant électrique au dessus de laquelle on est sûr que tous les allumeurs d'un lot fonctionneront.
Le courant de « non feu » correspond à la limite de l'intensité d'un courant électrique en dessous de laquelle on est sûr qu'aucun allumeur d'un lot ne fonctionnera.It is recalled in this connection that:
The “all fire” current corresponds to the limit of the intensity of an electric current above which we are sure that all the igniters in a batch will operate.
The “no fire” current corresponds to the limit of the intensity of an electric current below which it is certain that no igniter in a batch will work.

Cependant, du fait que les couches minces connues sont généralement déposées sur des supports conducteurs de la chaleur, ces initiateurs présentent également l'inconvénient de nécessiter une énergie de fonctionnement relativement importante.However, the fact that the known thin layers are generally deposited on conductive supports of heat, these initiators also exhibit the disadvantage of requiring an energy of relatively large operation.

Or, devant la multiplication des dispositifs de sécurité à l'intérieur des véhicules automobiles, les constructeurs souhaitent de plus en plus pouvoir disposer d'initiateurs fiables fonctionnant à très basse énergie.However, faced with the proliferation of safety inside motor vehicles, more and more manufacturers want have reliable initiators operating at very low energy.

L'objet de la présente invention est précisément de proposer un tel initiateur.The object of the present invention is precisely to propose such an initiator.

L'invention concerne donc un initiateur électropyrotechnique comprenant :

  • i) un conteneur possédant au moins une paroi fragilisée et qui est fermé par un corps massif de hauteur h possédant une face supérieure plane disposée à l'intérieur du conteneur et présentant, sur toute sa hauteur h, une structure isolante vis à vis de l'électricité,
  • ii) deux électrodes en forme de broches qui traversent complètement le dit corps massif, la dite structure isolante étant traversée par au moins l'une des deux électrodes,
  • iii) un circuit électrique constitué par des dépôts en couche mince sur un support qui est non conducteur de l'électricité et qui est fixé à la dite face supérieure plane, le dit circuit électrique étant relié aux dites électrodes et comprenant un élément résistif chauffant en couche mince, le dit circuit étant recouvert par une composition pyrotechnique d'amorçage,
    caractérisé en ce que :
  • iv) le dit support présente une conductivité thermique inférieure à 20 mW/cm.°C,
  • v) le dit élément résistif chauffant a une épaisseur inférieure à 1x10-6m,
  • vi) la dite composition pyrotechnique d'amorçage est constituée par un liant et par un explosif primaire dont la granulométrie est comprise entre 1x10-6 et 30x10-6m.
    • The invention therefore relates to an electropyrotechnic initiator comprising:
  • i) a container having at least one weakened wall and which is closed by a solid body of height h having a flat upper face disposed inside the container and having, over its entire height h, an insulating structure with respect to the 'electricity,
  • ii) two pin-shaped electrodes which completely pass through said solid body, said insulating structure being traversed by at least one of the two electrodes,
  • iii) an electrical circuit constituted by deposits in a thin layer on a support which is non-conductive of electricity and which is fixed to said flat upper face, said electrical circuit being connected to said electrodes and comprising a resistive heating element in thin layer, the said circuit being covered by a pyrotechnic initiation composition,
    characterized in that:
  • iv) said support has a thermal conductivity of less than 20 mW / cm. ° C,
  • v) the said resistive heating element has a thickness of less than 1x10 -6 m,
  • vi) said pyrotechnic initiation composition consists of a binder and a primary explosive, the particle size of which is between 1 × 10 -6 and 30 × 10 -6 m.

    • Ainsi, en utilisant comme élément résistif un dépôt en couche mince sur un support qui est à la fois isolant de l'électricité et très mauvais conducteur de la chaleur et en imposant des conditions particulières de granulométrie à l'explosif primaire présent dans la composition d'amorçage, il est possible de constituer un initiateur électro-pyrotechnique qui fonctionne de manière fiable avec de très basses énergies, de l'ordre de quelques centaines de microjoules et qui, lorsque les éléments constitutifs sont bien dimensionnés, présente des courants de tout feu et de non feu compatibles avec les nouvelles exigences des constructeurs automobiles.Thus, using a deposit as a resistive element in a thin layer on a support which is both insulating of electricity and very bad conductor of the heat and by imposing special conditions of particle size with primary explosive present in the priming composition, it is possible to constitute a electro-pyrotechnic initiator which operates from reliably with very low energies, around of a few hundred microjoules and which, when the components are well sized, present currents of all fire and non-fire compatible with the new requirements of car manufacturers.

    Le dit circuit électrique et le dit support seront avantageusement constitués par un composant, « C.M.S. » monté en surface du corps massif. De tels composants sont encore connus par leur appellation abrégée anglo-saxonne « S.M.D. » (Surface Mounted Device).Said electrical circuit and said support will be advantageously constituted by a component, "C.M.S. " mounted on the surface of the solid body. Such components are still known by their abbreviated Anglo-Saxon appellation "S.M.D. (Surface Mounted Device).

    Selon une réalisation préférée de l'invention une cale non conductrice de l'électricité et possédant deux faces planes opposées est collée par l'une de ses faces planes sur la face supérieure plane du dit corps massif et l'autre face plane de la cale porte deux nappes métalliques conductrices distinctes qui sont chacune au contact de l'une des deux électrodes et sur lesquelles est fixé, au moyen de deux soudures conductrices de l'électricité, le composant C.M.S.According to a preferred embodiment of the invention, wedge not conductive of electricity and having two opposite planar faces is glued by one of its faces planes on the planar upper face of said massive body and the other flat face of the hold carries two layers separate conductive metals which are each at contact of one of the two electrodes and on which is fixed, by means of two conductive welds of electricity, the C.M.S.

    Cette réalisation permet un assemblage particulièrement aisé de l'initiateur selon l'invention comme il sera expliqué en détails plus loin dans la description.This realization allows an assembly particularly easy for the initiator according to the invention as will be explained in detail later in the description.

    Enfin, selon une autre réalisation préférée de l'invention, le dit conteneur et le dit corps massif sont maintenus solidaires par un surmoulage non conducteur de l'électricité et qui est traversé par les deux électrodes.Finally, according to another preferred embodiment of the invention, said container and said massive body are held together by a non-overmolding conductor of electricity and which is crossed by two electrodes.

    Avantageusement le support sera constitué par un matériau choisi dans le groupe constitué par la silice vitreuse, les verres minéraux contenant de la silice, les résines organiques et les matières plastiques composites contenant au moins une résine organique et des fibres minérales. De manière préférée le dit support est constitué par un matériau choisi dans le groupe constitué par les verres minéraux contenant de la silice.Advantageously, the support will consist of a material chosen from the group consisting of silica vitreous, mineral glasses containing silica, organic resins and plastics composites containing at least one organic resin and mineral fibers. Preferably said support consists of a material chosen from the group made up of mineral glasses containing silica.

    Dans la cadre de la présente invention les différents explosifs primaires se prêtant à la condition de granulométrie exprimée plus haut sont susceptibles d'être utilisés mais on préfèrera, pour des raisons de fiabilité de fonctionnement, utiliser les sels du dinitrobenzofuroxanne et notamment le sel de rubidium du dinitrobenzofuroxanne (RbDNBF) et le sel de potassium du dinitrobenzofuroxanne (KDNBF). Le liant de la composition d'amorçage sera avantageusement constitué par une résine vinylique ou acrylique.In the context of the present invention the different primary explosives suitable for the condition of grain size expressed above are likely to be used but we prefer, for reasons of operating reliability, use the salts of dinitrobenzofuroxane and in particular the rubidium salt of dinitrobenzofuroxan (RbDNBF) and the potassium salt of dinitrobenzofuroxan (KDNBF). The binder of the priming composition will advantageously be constituted with vinyl or acrylic resin.

    Le dit élément résistif plat sera quant à lui avantageusement constitué par du nitrure de tantale.Said flat resistive element will be advantageously constituted by tantalum nitride.

    On donne ci-après une description détaillée d'une réalisation préférée de l'invention en faisant référence aux figures 1, 2 et 3.A detailed description is given below of preferred embodiment of the invention with reference Figures 1, 2 and 3.

    La figure 1 est une vue en coupe axiale d'un initiateur cylindrique selon l'invention.Figure 1 is an axial sectional view of a cylindrical initiator according to the invention.

    La figure 2 est une vue de dessus du circuit électrique par dépôt en couches minces utilisé dans l'initiateur représenté à la figure 1.Figure 2 is a top view of the circuit electric by thin film deposition used in the initiator shown in Figure 1.

    La figure 3 est en une vue en coupe partielle du corps massif portant la cale et le composant C.M.S. tels qu'utilisés dans l'initiateur représenté à la figure 1. Figure 3 is a partial sectional view of the massive body carrying the wedge and the C.M.S. such used in the initiator shown in Figure 1.

    Un initiateur électro-pyrotechnique 1 selon l'invention est représenté à la figure 1. Cet initiateur 1 est constitué par un conteneur cylindrique 2 fragmentable ouvert à l'une de ses extrémités. Un corps cylindrique massif 3 ferme l'extrémité ouverte du conteneur 2. La paroi latérale 4 du corps 3 présente un épaulement externe 5 sur lequel prend appui l'extrémité ouverte du conteneur 2. Le conteneur 2 et le corps 3 sont enserrés dans un surmoulage 6 qui les maintient solidaires l'un de l'autre. Le conteneur 2 a ainsi la forme d'un capuchon cylindrique présentant une paroi latérale 7 et une paroi supérieure plane 8. Le conteneur 2 est avantageusement constitué par un métal léger fin comme l'aluminium et sa paroi plane 8 est avantageusement fragilisée pour pouvoir s'ouvrir aisément sous l'effet d'une augmentation de la pression régnant à l'intérieur du conteneur. Le surmoulage 6 est réalisé préférentiellement dans une résine thermoplastique comme, par exemple, le téréphtalate de polyéthylène.An electro-pyrotechnic initiator 1 according to the invention is shown in Figure 1. This initiator 1 consists of a cylindrical container 2 fragmentable open at one of its ends. A body massive cylindrical 3 closes the open end of the container 2. The side wall 4 of the body 3 has a external shoulder 5 on which the end is supported container 2 open. container 2 and body 3 are enclosed in an overmolding 6 which holds them in solidarity with each other. Container 2 thus has the shape of a cylindrical cap having a wall side 7 and a flat upper wall 8. The container 2 is advantageously constituted by a thin light metal like aluminum and its flat wall 8 is advantageously weakened to be able to open easily due to increased pressure prevailing inside the container. Overmolding 6 is preferably made in a resin thermoplastic such as, for example, terephthalate polyethylene.

    Le corps 3 doit pouvoir faire fonction de paroi étanche à une détonation et aux gaz de combustion résultant de cette détonation. Ce corps 3 est préférentiellement réalisé dans un métal dense comme l'acier. Le corps 3 présente une face supérieure 9 plane et une face inférieure 15 également plane et il enserre sur toute sa hauteur h, un tube creux en verre 10. Deux électrodes 12, 13 en forme de broche cylindrique traversent le corps 3, l'électrode 12 le traversant par l'intermédiaire du tube creux 10 en verre.Body 3 must be able to function as a wall impervious to detonation and combustion gases resulting from this detonation. This body 3 is preferably made of a dense metal such as steel. The body 3 has a flat upper face 9 and a lower face 15 also flat and it encloses over its entire height h, a hollow glass tube 10. Two electrodes 12, 13 in the form of a cylindrical pin pass through the body 3, the electrode 12 passing through it through the hollow glass tube 10.

    Chaque électrode présente une extrémité qui dépasse la face supérieure plane 9 du corps 3 et une extrémité qui dépasse la face inférieure 14 du surmoulage 6. Sur la face supérieure plane 9 du corps 3 est fixée, par exemple par collage, une cale isolante 16 qui se trouve ainsi disposée à l'intérieur du conteneur 2.Each electrode has one end that protrudes the planar upper face 9 of the body 3 and one end which exceeds the lower face 14 of the overmolding 6. On the planar upper face 9 of the body 3 is fixed, by example by gluing, an insulating shim 16 which is located thus arranged inside the container 2.

    Le cale 16 est à base de résine polyépoxy chargée de fibres de verre et a la forme d'un disque comportant deux canaux cylindriques destinés à laisser passer, au cours de l'assemblage de l'initiateur 1, les électrodes 12 et 13.Wedge 16 is based on charged polyepoxy resin of glass fibers and has the shape of a disc comprising two cylindrical channels intended to let through during the assembly of initiator 1, the electrodes 12 and 13.

    La cale 16 porte sur sa face supérieure deux nappes métalliques distinctes et non jointives en cuivre 21 et 22 ; les extrémités supérieures des électrodes 12 et 13 sont chacune connectées à l'une des nappes 21 et 22 au moyen de soudures 27 et 28 réalisées dans un alliage conducteur de l'électricité.The wedge 16 carries on its upper face two plies distinct and non-contiguous metallic elements of copper 21 and 22; the upper ends of electrodes 12 and 13 are each connected to one of the layers 21 and 22 at welds 27 and 28 made of an alloy conductor of electricity.

    En travers de ces deux nappes 21 et 22 est fixé un composant C.M.S. constitué par un support 26 en forme de puce parallélépipédique dont la face supérieure porte un circuit électrique 18.Le support 26 est constitué par un verre « flint » ordinaire contenant entre 20% et 55% de silice SiO2. Un tel verre est un excellent isolant électrique et un très mauvais conducteur de la chaleur, sa conductivité thermique étant de l'ordre de 6mW/cm°C. Le circuit 18 est constitué par un dépôt 29 en couche mince de nitrure de tantale partiellement recouvert par des dépôts en couches minces 30 et 31 de métaux conducteurs à base d'or et de palladium. Comme représenté à la figure 2, les dépôts 29, 30 et 31 ont des formes trapézoïdales qui laissent non recouverte une zone parallélépipédique centrale 17 du dépôt 29 en nitrure de tantale. Cette zone 17 constitue l'élément résistif chauffant en couche mince du circuit électrique 18. Une soudure en étain 32 enserre l'une des extrémités du support 26 de manière à assurer une connection électrique entre le dépôt conducteur 30 et la nappe conductrice 22 tandis qu'une soudure distincte 33 également en étain enserre l'extrémité opposée du support 26 de manière à assurer une connection électrique entre le dépôt conducteur 31 et la nappe conductrices 21.Across these two layers 21 and 22 is fixed a SMD component constituted by a support 26 in the form of a parallelepiped chip, the upper face of which carries an electrical circuit 18. The support 26 consists of an ordinary "flint" glass containing between 20% and 55% silica SiO 2 . Such a glass is an excellent electrical insulator and a very poor conductor of heat, its thermal conductivity being of the order of 6mW / cm ° C. The circuit 18 consists of a deposit 29 in a thin layer of tantalum nitride partially covered by deposits in thin layers 30 and 31 of conductive metals based on gold and palladium. As shown in FIG. 2, the deposits 29, 30 and 31 have trapezoidal shapes which leave uncovered a central parallelepipedal area 17 of the deposit 29 made of tantalum nitride. This zone 17 constitutes the resistive heating element in a thin layer of the electrical circuit 18. A tin solder 32 encloses one of the ends of the support 26 so as to ensure an electrical connection between the conductive deposit 30 and the conductive sheet 22 while a separate solder 33 also made of tin encloses the opposite end of the support 26 so as to ensure an electrical connection between the conductive deposit 31 and the conductive sheet 21.

    Le circuit électrique 18 comportant l'élément résistif chauffant 17 est recouvert par une composition pyrotechnique d'amorçage 23 constituée pour 80% de son poids par le sel de rubidium du dinitrobenzofuroxanne et pour 20% de son poids par une résine époxy faisant fonction de liant. La granulométrie de l'explosif primaire RbDNBF était voisine de 20x10-6m.The electrical circuit 18 comprising the resistive heating element 17 is covered by a pyrotechnic initiation composition 23 constituted for 80% of its weight by the rubidium salt of dinitrobenzofuroxane and for 20% of its weight by an epoxy resin acting as a binder . The particle size of the primary explosive RbDNBF was close to 20 × 10 -6 m.

    Le conteneur 2 contient également une poudre d'allumage 25 constituée, par exemple, par une poudre à base de nitrocellulose ou par un mélange de bore et de nitrate de potassium.Container 2 also contains a powder ignition 25 consisting, for example, of a powder nitrocellulose base or by a mixture of boron and potassium nitrate.

    Un tel initiateur est particulièrement simple et économique à fabriquer en série. On commence par déposer, par évaporation sous vide, le circuit 18 en couches minces sur son support 26. On fixe ensuite les électrodes 12 et 13 à la cale 16 recouverte des nappes 21 et 22 sur lesquelles on soude le support 26. La cale 16 ainsi équipée est collée à la face supérieure plane 9 du corps massif 3 de manière à constituer une tête d'initiation que l'on recouvre par la composition d'amorçage 23 avant de l'introduire dans le conteneur 2 contenant la poudre d'allumage 25. Il suffit alors de solidariser l'ensemble grâce au surmoulage 6. Such an initiator is particularly simple and economical to mass produce. We start with deposit, by vacuum evaporation, circuit 18 in thin layers on its support 26. Then fix the electrodes 12 and 13 in the shim 16 covered with the layers 21 and 22 on which the support is welded 26. The wedge 16 thus fitted is glued to the flat upper face 9 of the solid body 3 so as to constitute a head of initiation which is covered by the composition priming 23 before introducing it into container 2 containing the ignition powder 25. It then suffices to join together thanks to overmolding 6.

    Les initiateurs selon l'invention peuvent fonctionner de manière fiable avec une très faible énergie, de l'ordre de 100 à 200 micro-joules ou encore de 1x10-4 à 2x10-4J, et, lorsque leurs éléments constitutifs et notamment l'élément résitif 17 sont bien dimensionnés, ils présentent des valeurs de courant de tout feu voisines de 1200mA et des valeurs de courant de non feu supérieures à 500mA. Par ailleurs les initiateurs à dépôts en couches minces étant bien résistants aux vibrations, les initiateurs selon l'invention trouvent une application préférée dans le domaine de la protection, par dispositifs électro-pyrotechniques, des occupants d'un véhicules automobile.The initiators according to the invention can operate reliably with very low energy, of the order of 100 to 200 micro-joules or even from 1x10 -4 to 2x10 -4 J, and, when their constituent elements and in particular the resistor element 17 are well dimensioned, they have current values of any fire close to 1200mA and non-fire current values greater than 500mA. Furthermore, the initiators with thin film deposits being very resistant to vibrations, the initiators according to the invention find a preferred application in the field of protection, by electro-pyrotechnic devices, of the occupants of a motor vehicle.

    Exemples 1 à 4Examples 1 to 4

    On fabriqué quatre groupe d'initiateurs de structure analogue à celle représentée aux figures 1 et 2 et présentant les caractéristiques structurelles suivantes Groupe Elément résistif 17 Composition d'amorçage Nature du support 26 1 - Nickel/chrome - Epaisseur 25 microns Mélange oxydo-réducteur Résine époxy 2 - Nickel/chrome - Epaisseur 5 microns Trinotrorésorcinate de plomb + résine vinylique Résine époxy 3 -Nitrure de tantale - Epaisseur 1 micron Trinotrorésorcinate de plomb + résine vinylique alumine 4 - Nitrure de tantale - Epaisseur 0,5 micron RbDNBF de granulométrie voisine de 20 microns + résine vinylique Verre «flint» Rappel : 1 micron = 1 micromètre = 10-6m. Four groups of initiators with a structure similar to that shown in FIGS. 1 and 2 are produced and having the following structural characteristics Group Resistive element 17 Priming composition Type of support 26 1 - Nickel / chrome - Thickness 25 microns Redox mixture Epoxy resin 2 - Nickel / chrome - Thickness 5 microns Lead Trinotrororcorcate + vinyl resin Epoxy resin 3 - Tantalum nitride - Thickness 1 micron Lead Trinotrororcorcate + vinyl resin alumina 4 - Tantalum nitride - Thickness 0.5 micron RbDNBF with a particle size close to 20 microns + vinyl resin "Flint" glass Reminder : 1 micron = 1 micrometer = 10 -6 m.

    L'initiateur n°1 correspond à un initiateur à pont en couche épaisse, sur un support non conducteur de la chaleur et avec une composition d'amorçage utilisant un mélange oxydo-réducteur.
    L'initiateur n°2 correspond à un initiateur à pont en couche épaisse, sur un support non conducteur de la chaleur et avec une composition d'amorçage utilisant un explosif primaire.     Initiator No. 1 corresponds to a thick layer bridge initiator, on a non-heat conducting support and with a priming composition using an oxidation-reduction mixture.
    Initiator No. 2 corresponds to a thick layer bridge initiator, on a non-heat conducting support and with a priming composition using a primary explosive.

    L'initiateur n°3 correspond à un initiateur à pont en couche mince, sur un support conducteur de la chaleur et avec une composition d'amorçage utilisant un explosif primaire Initiator # 3 is a thin layer bridge initiator on a heat conducting support with a priming composition using a primary explosive

    L'initiateur n°4 réunit les trois caractéristiques essentielles de l'invention :

    • pont en couche mince,
    • support non conducteur de la chaleur,
    • explosif primaire de granulométrie inférieure à 30 microns.
    Initiator No. 4 combines the three essential characteristics of the invention:
    • thin layer bridge,
    • non heat conducting support,
    • primary explosive with particle size less than 30 microns.

    Ces initiateurs ont présenté les caractéristiques de fonctionnement suivantes : Groupe n° Courant de « Non Feu » Courant de « Tout Feu » Energie 1 300 mA 1750 mA 5 mJ 2 250 mA 1200mA 4 mJ 3 500mA 1200 mA 3,5 mJ 4 600 mA 1100mA 0,200 mJ mA = milliampère = 10-3A mJ = millijoule = 10-3J These initiators presented the following operating characteristics: Group no. "No Fire" current Current of "Tout Feu" Energy 1 300 mA 1750 mA 5 mJ 2 250 mA 1200mA 4 mJ 3 500mA 1200 mA 3.5 mJ 4 600 mA 1100mA 0.200 mJ mA = milliamp = 10 -3 A mJ = millijoule = 10 -3 J

    Claims (9)

    Initiateur électropyrotechnique (1) comportant : i) un conteneur (2) possédant au moins une paroi fragilisée (8) et qui est fermé par un corps massif (3) de hauteur h possédant une face supérieure plane (9) disposée à l'intérieur du conteneur (2) et présentant, sur toute sa hauteur h, une structure isolante (10) vis à vis de l'électricité, ii) deux électrodes (12,13) en forme de broches qui traversent complètement le dit corps massif, la dite structure isolante (10) étant traversée par au moins l'une des deux électrodes, iii) un circuit électrique (18) constitué par des dépôts en couche mince sur un support (26) qui est non conducteur de l'électricité et qui est fixé à la dite face supérieure plane (9), le dit circuit électrique étant relié aux dites électrodes (12,13) et comprenant un élément résistif chauffant (17) en couche mince, le dit circuit étant recouvert par une composition pyrotechnique d'amorçage (23), caractérisé en ce que : iv) le dit support (26) présente une conductivité thermique inférieure à 20 mW/cm.°C, v) le dit élément résistif chauffant (17) a une épaisseur inférieure à 1x10-6m, vi) la dite composition pyrotechnique d'amorçage (23) est constituée par un liant et par un explosif primaire dont la granulométrie est comprise entre 1x10-6m et 30x10-6m. Electro-pyrotechnic initiator (1) comprising: i) a container (2) having at least one weakened wall (8) and which is closed by a solid body (3) of height h having a flat upper face (9) disposed inside the container (2) and having , over its entire height h, an insulating structure (10) with respect to electricity, ii) two electrodes (12, 13) in the form of pins which completely pass through said solid body, said insulating structure (10) being traversed by at least one of the two electrodes, iii) an electrical circuit (18) consisting of deposits in a thin layer on a support (26) which is non-conductive of electricity and which is fixed to said flat upper face (9), said electrical circuit being connected to said electrodes (12, 13) and comprising a resistive heating element (17) in a thin layer, the said circuit being covered by a pyrotechnic initiation composition (23), characterized in that : iv) said support (26) has a thermal conductivity of less than 20 mW / cm. ° C, v) said resistive heating element (17) has a thickness of less than 1 × 10 -6 m, vi) said pyrotechnic initiation composition (23) consists of a binder and a primary explosive, the particle size of which is between 1 × 10 -6 m and 30 × 10 -6 m. Initiateur électropyrotechnique selon la revendication 1 caractérisé en ce que le dit circuit électrique (18) et le dit support (26) sont constitués par un composant C.M.S. monté en surface du corps massif (3).Electropyrotechnic initiator according to claim 1 characterized in that the said electrical circuit (18) and the said support (26) consist of a SMD component mounted on the surface of the solid body (3). Initiateur électropyrotechique selon la revendication 2 caractérisé en ce qu'une cale (16) non conductrice de l'électricité et possédant deux face planes opposées est collée par l'une de ses faces planes sur la face supérieure plane (9) du corps (3) et en ce que l'autre face plane de la cale (16) porte deux nappes métalliques conductrices distinctes (21,22) qui sont chacune au contact de l'une des deux électrodes et sur lesquelles est fixé, au moyen de deux soudures conductrices de l'électricité, le composant C.M.S.Electropyrotechic initiator according to claim 2 characterized in that a wedge (16) which is not electrically conductive and which has two opposite flat faces is glued by one of its flat faces to the flat upper face (9) of the body (3 ) and in that the other flat face of the wedge (16) carries two separate conductive metallic sheets (21, 22) which are each in contact with one of the two electrodes and on which is fixed, by means of two welds electrically conductive, the CMS component Initiateur électropyrotechnique selon la revendication 1 caractérisé en ce que le dit conteneur (2) et le dit corps massif (3) sont maintenus solidaires par un surmoulage (6) non conducteur de l'électricité.Electropyrotechnic initiator according to Claim 1, characterized in that the said container (2) and the said solid body (3) are held together by an overmolding (6) which does not conduct electricity. Initiateur électropyrotechnique selon la revendication 1 caractérisé en ce que le dit support est constitué par un matériau choisi dans le groupe constitué par la silice vitreuse, les verres minéraux contenant de la silice, les résines organiques, les matières plastiques composites contenant au moins une résine organique et des fibres minérales. Electropyrotechnic initiator according to claim 1 characterized in that said support consists of a material chosen from the group consisting of vitreous silica, mineral glasses containing silica, organic resins, composite plastics containing at least one organic resin and mineral fibers. Initiateur électropyrotechnique selon la revendication 5 caractérisé en ce que le dit support est constitué par un matériau choisi dans le groupe constitué par les verres minéraux contenant de la silice.Electropyrotechnic initiator according to Claim 5, characterized in that the said support consists of a material chosen from the group consisting of mineral glasses containing silica. Initiateur électropyrotechnique selon la revendication 1 caractérisé en ce que le dit explosif primaire est un sel du dinitrobenzofuroxanne.Electropyrotechnic initiator according to claim 1 characterized in that said primary explosive is a salt of dinitrobenzofuroxane. Initiateur électropyrotechnique selon la revendication 7 caractérisé en ce que le dit explosif primaire est choisi dans le groupe constitué par le sel de rubidium du dinitrobenzofuroxanne (RbDNBF) et par le sel de potassium du dinitrobenzofuroxanne (KDNBF).Electropyrotechnic initiator according to Claim 7, characterized in that the said primary explosive is chosen from the group consisting of the rubidium salt of dinitrobenzofuroxane (RbDNBF) and by the potassium salt of dinitrobenzofuroxanne (KDNBF). Initiateur électropyrotechnique selon la revendication 1 caractérisé en ce que le dit élément résistif plat est constitué par du nitrure de tantale.Electropyrotechnic initiator according to Claim 1, characterized in that the said flat resistive element consists of tantalum nitride.
    EP01401108A 2000-05-30 2001-04-27 Electro-pyrotechnic initiator having a thin layer ignition bridge and low energy requirement Expired - Lifetime EP1160533B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0006926A FR2809806B1 (en) 2000-05-30 2000-05-30 ELECTRO-PYROTECHNIC INITIATOR WITH A THIN FILM BRIDGE AND A VERY LOW OPERATING ENERGY
    FR0006926 2000-05-30

    Publications (2)

    Publication Number Publication Date
    EP1160533A1 true EP1160533A1 (en) 2001-12-05
    EP1160533B1 EP1160533B1 (en) 2004-10-20

    Family

    ID=8850787

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01401108A Expired - Lifetime EP1160533B1 (en) 2000-05-30 2001-04-27 Electro-pyrotechnic initiator having a thin layer ignition bridge and low energy requirement

    Country Status (10)

    Country Link
    US (1) US6640718B2 (en)
    EP (1) EP1160533B1 (en)
    JP (1) JP2002013900A (en)
    KR (1) KR20010110110A (en)
    CN (1) CN1326878A (en)
    AT (1) ATE280382T1 (en)
    BR (1) BR0102151A (en)
    DE (1) DE60106519T2 (en)
    ES (1) ES2228766T3 (en)
    FR (1) FR2809806B1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP3134298A4 (en) * 2014-04-24 2017-12-27 Autoliv ASP, Inc. Surface mount initiators

    Families Citing this family (28)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10123284A1 (en) 2001-05-12 2002-11-14 Conti Temic Microelectronic Pyrotechnic ignition device with integrated electronics module
    DE10123282A1 (en) 2001-05-12 2002-11-14 Conti Temic Microelectronic Pyrotechnic ignition device with integrated electronics module
    DE10123285A1 (en) * 2001-05-12 2002-11-14 Conti Temic Microelectronic Ignition element for pyrotechnic active materials on a circuit carrier arrangement with an ignition electronics module
    US20030192446A1 (en) * 2002-04-16 2003-10-16 Paul Berg Header with overlying eyelet
    US20040244624A1 (en) * 2003-01-31 2004-12-09 Hiroshi Harada Parts of igniter
    DE10308443A1 (en) * 2003-02-27 2004-09-09 Dynltec Gmbh Electric detonator
    US20040226473A1 (en) * 2003-05-13 2004-11-18 David Davison Inert initiator and explosive device
    DE20307603U1 (en) * 2003-05-15 2003-09-25 Trw Airbag Sys Gmbh Lighter for use in a vehicle occupant protection device
    US8020490B1 (en) 2003-07-24 2011-09-20 University Of South Florida Method of fabricating MEMS-based micro detonators
    US20060208474A1 (en) * 2003-12-24 2006-09-21 Nippon Kayaku Kabushiki Kaisha Gas producer
    EP1726357A4 (en) * 2004-03-02 2013-03-06 Nippon Kayaku Kk Gas generator
    US20060260498A1 (en) * 2005-04-05 2006-11-23 Daicel Chemical Industries, Ltd. Igniter assembly
    US7571679B2 (en) * 2006-09-29 2009-08-11 Reynolds Systems, Inc. Energetic material initiation device having integrated low-energy exploding foil initiator header
    US8408131B1 (en) 2006-09-29 2013-04-02 Reynolds Systems, Inc. Energetic material initiation device
    JP4705550B2 (en) 2006-10-26 2011-06-22 日本化薬株式会社 Gas generator for squib and airbag and gas generator for seat belt pretensioner
    JP4653718B2 (en) 2006-10-26 2011-03-16 日本化薬株式会社 Gas generator for squib and airbag and gas generator for seat belt pretensioner
    US8276516B1 (en) 2008-10-30 2012-10-02 Reynolds Systems, Inc. Apparatus for detonating a triaminotrinitrobenzene charge
    CN103017197B (en) * 2011-09-23 2014-10-01 中国电子科技集团公司第四十八研究所 Lead-free packaging thin film bridge firer and manufacturing method thereof
    CN102384486A (en) * 2011-09-23 2012-03-21 中国电子科技集团公司第四十八研究所 Ni-Cr alloy thin film igniter with low ignition voltage and preparation method thereof
    DE102012004966B3 (en) * 2012-03-14 2013-01-03 A&O Technologie GmbH Ignition base for pyroelectrically igniting propellant in pyroelectric igniter used in micro gas generator for e.g. airbag in motor car, has part of projecting pins, and base provided with plastic sheathing below front surface upto outlet
    CN102927590A (en) * 2012-10-26 2013-02-13 中国电子科技集团公司第四十八研究所 Metal film bridge igniter and preparation method thereof
    US8934214B2 (en) * 2013-04-09 2015-01-13 Halliburton Energy Services, Inc. Plasma gap detonator with novel initiation scheme
    GB201601073D0 (en) 2016-01-20 2016-03-02 Ucb Biopharma Sprl Antibodies
    GB201601077D0 (en) 2016-01-20 2016-03-02 Ucb Biopharma Sprl Antibody molecule
    GB201601075D0 (en) 2016-01-20 2016-03-02 Ucb Biopharma Sprl Antibodies molecules
    CN105423340B (en) * 2015-11-30 2018-07-06 中国电子科技集团公司第四十八研究所 Integrated membrane bridge igniter and preparation method thereof
    RU201815U1 (en) * 2020-10-15 2021-01-13 Общество с ограниченной ответственностью Научно-производственная компания "Рэлсиб" (ООО НПК "Рэлсиб") Planar structure of the initiator
    FR3135320B1 (en) 2022-05-03 2024-03-22 Ncs Pyrotechnie Et Tech Sas Reduced performance igniter and thermal pellets

    Citations (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3572247A (en) 1968-08-29 1971-03-23 Theodore Warshall Protective rf attenuator plug for wire-bridge detonators
    US4729315A (en) 1986-12-17 1988-03-08 Quantic Industries, Inc. Thin film bridge initiator and method therefor
    WO1996024024A1 (en) * 1995-01-31 1996-08-08 Quantic Industries, Inc. Improved semiconductor bridge explosive device
    US5576509A (en) * 1994-05-31 1996-11-19 Giat Industries Pyrotechnic detonator and method for manufacturing same
    WO1998025100A1 (en) * 1996-12-05 1998-06-11 International Resistive Company, Inc. Ceramic substrate electric igniter with nitrided tantalum bridge
    WO1998028792A1 (en) * 1996-12-23 1998-07-02 Scb Technologies, Inc. Surface connectable semiconductor bridge elements, devices and methods
    US5798476A (en) 1996-03-25 1998-08-25 Trw Inc. Initiator for an air bag inflator
    DE19732380A1 (en) * 1997-07-25 1999-02-11 Telefunken Microelectron Thin film igniter for pyrotechnic material especially of airbag
    FR2781878A1 (en) * 1998-07-31 2000-02-04 Giat Ind Sa PROCESS FOR IMPLEMENTING A PYROTECHNIC SUBSTANCE AND PYROTECHNIC INITIATOR OBTAINED WITH SUCH A METHOD

    Family Cites Families (11)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5254838A (en) * 1987-09-14 1993-10-19 Nippon Koki Co., Ltd. Igniter for electric ignition systems
    US5140906A (en) * 1991-11-05 1992-08-25 Ici Americas, Inc. Airbag igniter having double glass seal
    FR2693721B1 (en) * 1992-07-20 1994-10-21 Ncs Pyrotechnie Technologies Priming charge with annular percussion and its manufacturing process.
    FR2704944B1 (en) * 1993-05-05 1995-08-04 Ncs Pyrotechnie Technologies Electro-pyrotechnic initiator.
    JP2700100B2 (en) * 1993-05-28 1998-01-19 日本工機株式会社 Igniter
    US5596163A (en) * 1993-08-25 1997-01-21 Ems-Patvag Ag Gas generator igniting capsule
    US5932832A (en) * 1996-04-15 1999-08-03 Autoliv Asp, Inc. High pressure resistant initiator with integral metal oxide varistor for electro-static discharge protection
    US5736668A (en) * 1996-05-28 1998-04-07 Trw Inc. Inflator for an inflatable vehicle occupant protection device
    FR2784176B1 (en) * 1998-10-06 2004-11-26 Livbag Snc ELECTRO-PYROTECHNIC INITIATION SYSTEM PROTECTED AGAINST ELECTROSTATIC DISCHARGES
    FR2790078B1 (en) 1999-02-18 2004-11-26 Livbag Snc ELECTROPYROTECHNIC IGNITER WITH ENHANCED IGNITION SAFETY
    FR2800865B1 (en) 1999-11-05 2001-12-07 Livbag Snc PYROTECHNIC INITIATOR WITH PHOTOGRAVE FILAMENT PROTECTED AGAINST ELECTROSTATIC DISCHARGES

    Patent Citations (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3572247A (en) 1968-08-29 1971-03-23 Theodore Warshall Protective rf attenuator plug for wire-bridge detonators
    US4729315A (en) 1986-12-17 1988-03-08 Quantic Industries, Inc. Thin film bridge initiator and method therefor
    US5576509A (en) * 1994-05-31 1996-11-19 Giat Industries Pyrotechnic detonator and method for manufacturing same
    WO1996024024A1 (en) * 1995-01-31 1996-08-08 Quantic Industries, Inc. Improved semiconductor bridge explosive device
    US5798476A (en) 1996-03-25 1998-08-25 Trw Inc. Initiator for an air bag inflator
    WO1998025100A1 (en) * 1996-12-05 1998-06-11 International Resistive Company, Inc. Ceramic substrate electric igniter with nitrided tantalum bridge
    WO1998028792A1 (en) * 1996-12-23 1998-07-02 Scb Technologies, Inc. Surface connectable semiconductor bridge elements, devices and methods
    DE19732380A1 (en) * 1997-07-25 1999-02-11 Telefunken Microelectron Thin film igniter for pyrotechnic material especially of airbag
    FR2781878A1 (en) * 1998-07-31 2000-02-04 Giat Ind Sa PROCESS FOR IMPLEMENTING A PYROTECHNIC SUBSTANCE AND PYROTECHNIC INITIATOR OBTAINED WITH SUCH A METHOD

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP3134298A4 (en) * 2014-04-24 2017-12-27 Autoliv ASP, Inc. Surface mount initiators

    Also Published As

    Publication number Publication date
    FR2809806A1 (en) 2001-12-07
    JP2002013900A (en) 2002-01-18
    US20020002924A1 (en) 2002-01-10
    US6640718B2 (en) 2003-11-04
    KR20010110110A (en) 2001-12-12
    DE60106519T2 (en) 2005-12-01
    ES2228766T3 (en) 2005-04-16
    FR2809806B1 (en) 2003-01-10
    BR0102151A (en) 2002-02-13
    CN1326878A (en) 2001-12-19
    ATE280382T1 (en) 2004-11-15
    DE60106519D1 (en) 2004-11-25
    EP1160533B1 (en) 2004-10-20

    Similar Documents

    Publication Publication Date Title
    EP1160533B1 (en) Electro-pyrotechnic initiator having a thin layer ignition bridge and low energy requirement
    EP1030159B1 (en) Electro-pyrotechnical igniter with augmented ignition safety
    EP1098162B1 (en) Pyrotechnic initiator with photo-etched ignition bridge and protection against electrostatic discharges
    EP1180659B1 (en) Electric pyrotechnic igniter having two initiator heads and its use in vehicle security systems
    EP0711400B1 (en) Pyrotechnical initiator
    CA2217399C (en) Electroexplosive initiator, method for making same, and vehicle safety system
    EP0992760A1 (en) Electro-pyrotechnic initiator protected against electrostatic discharges
    FR2704944A1 (en) Electro-pyrotechnic initiator
    FR2669725A1 (en) PYROTECHNIC DETONATOR WITH COAXIAL CONNECTIONS.
    WO2008050861A1 (en) Squib and gas generator for air bag and gas generator for seat belt pretensioner
    US7652868B2 (en) Electropyrotechnic initiator
    FR2799708A1 (en) INFLATABLE METAL STRUCTURE WITH INTEGRATED PYROTECHNIC LOADING
    FR2794235A1 (en) ELECTRIC CONTROL IGNITER, PARTICULARLY FOR INFLATING A DEVICE FOR PROTECTING A VEHICLE OCCUPANT
    EP0849130B1 (en) Pyrotechnic gas generator with composite loading
    FR2866106A1 (en) Electro-pyrotechnic initiator, e.g. for motor vehicle airbag, has heat dissipator insulated electrically from resistive heating element
    EP1143218B1 (en) Resistive element for a pyrotechnic initiator
    EP0296962A1 (en) Initiator for a pyrotechnic generator
    WO2007003802A2 (en) Fast-operating electrical initiator having a plastic structure and gas generator comprising one such initiator
    FR2912501A1 (en) METHOD FOR MOUNTING PROTECTION IN AN ELECTRO-PYROTECHNIC INITIATOR AND INITIATOR
    FR2868833A1 (en) Electro-pyrotechnic initiator for motor vehicle, has cap with pyrotechnic charges that are ignited by heat resistant wire which is welded through its ends on electricity conducting plates of printed circuit plate, on single assembling chain
    FR2808718A1 (en) Magazine, for embedding tool, comprises series of explosive charge measures held between two layers of support material for electrical firing

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 20020605

    AKX Designation fees paid

    Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

    17Q First examination report despatched

    Effective date: 20020926

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: LIVBAG S.N.C.

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041020

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041020

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041020

    Ref country code: IE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041020

    Ref country code: TR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041020

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: EP

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FG4D

    Free format text: FRENCH

    REF Corresponds to:

    Ref document number: 60106519

    Country of ref document: DE

    Date of ref document: 20041125

    Kind code of ref document: P

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050120

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050120

    REG Reference to a national code

    Ref country code: SE

    Ref legal event code: TRGR

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2228766

    Country of ref document: ES

    Kind code of ref document: T3

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050427

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050427

    Ref country code: CY

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050427

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050428

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050428

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050430

    Ref country code: CH

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050430

    Ref country code: MC

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050430

    Ref country code: LI

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050430

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FD4D

    RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

    Owner name: LIVBAG

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20050721

    BERE Be: lapsed

    Owner name: LIVBAG S.N.C.

    Effective date: 20050430

    EUG Se: european patent has lapsed
    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: PL

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20050427

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20050428

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20070412

    Year of fee payment: 7

    BERE Be: lapsed

    Owner name: *LIVBAG S.N.C.

    Effective date: 20050430

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050320

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20070413

    Year of fee payment: 7

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20081101

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20081231

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080430