EP0925480B1 - Igniting/firing element with an igniting jumper on a chip - Google Patents

Igniting/firing element with an igniting jumper on a chip Download PDF

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Publication number
EP0925480B1
EP0925480B1 EP97944872A EP97944872A EP0925480B1 EP 0925480 B1 EP0925480 B1 EP 0925480B1 EP 97944872 A EP97944872 A EP 97944872A EP 97944872 A EP97944872 A EP 97944872A EP 0925480 B1 EP0925480 B1 EP 0925480B1
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EP
European Patent Office
Prior art keywords
chip
metal body
ignition
fuse
firing element
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 - Lifetime
Application number
EP97944872A
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German (de)
French (fr)
Other versions
EP0925480A1 (en
Inventor
Uwe Albrecht
Uwe Brede
Anton Bretfeld
Heinz-Peter Cornelius
Josef Kraft
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.)
Dynamit Nobel AG
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
Original Assignee
Dynamit Nobel AG
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
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Publication date
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Publication of EP0925480A1 publication Critical patent/EP0925480A1/en
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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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the invention relates to an ignition / ignition element according to the preamble of the claim 1.
  • the ignition unit for triggering detonators is known from DE 38 83 266 T2.
  • the ignition unit consists of an electrically operated ignition or Melting head, a power source connected to the ignition head via a switching device is connected and an electronic unit.
  • the electronics unit has at least one Chip, made of a semiconductor material and provided with a microcircuit, on.
  • the chip carries an ignition head or an ignition bridge on its surface. The Ignition charge is applied directly to the ignition bridge.
  • the invention is based, an ignition / ignition element according to the task Generic preamble of claim 1, which due to its compact design can be used universally and in which when the ignition / Ignition element an uncontrolled blowing is avoided.
  • the principle of operation of the ignition / ignition element is as follows: when one is put on electrical voltage at the two pins, a current flows through the ignition / ignition element and the electrical energy is converted into thermal energy in the ignition bridge converted; the ignition bridge heats up. The one on the ignition bridge Ignition rate is initiated and by the implementation of the ignition rate or the gas pressure resulting from the ignition charges becomes a pressed bottom of the housing broken up. The hot gases and particles can then pass through this opening escape to ignite a downstream charge.
  • the metal body For permanently durable coupling of the plastic body to the metal body the metal body at its end facing the igniter reduced diameter with a circumferential groove. At least in this groove introduced two openings to the holes above the glass bushings.
  • the plastic body When the plastic body is molded or molded on, it engages around the Range of the smaller diameter of the metal body and penetrates through the groove and the openings in the holes and fill them above the glass bushings completely out. This ensures an optimal connection.
  • the housing is expediently sleeve-shaped, the metal body forms the lower base plate.
  • the housing advantageously includes the Plastic body and the metal body and is at the bottom of the metal body with this connected by a flare and a potting compound.
  • the chip rests on the metal body.
  • the chip has a conductive surface on its front side, onto which at least one resistance track is applied, which is laser cut in the conductive surface is so separated from it that there is at least one ignition bridge with the required resistance values. Laser cuts cause certain areas of the conductive surface are removed.
  • a spark plug material to be used, which initiates an exothermic reaction when ignited.
  • a spark plug material e.g. Magnesium or zirconium or an alloy thereof is suitable. This has the advantage that the ignition charge is no longer mechanically fixed on the ignition bridge must be pressed on, since the ignition bridge itself initiates an exothermic reaction executes.
  • One way to avoid unwanted triggering by interference pulses, High frequency radiation etc. consists of a capacitor parallel to the ignition circuit to switch.
  • the back of the chip is therefore advantageously metallized, so that the chip in connection with the conductive surface on the front Forms capacitor and this capacitor is connected in parallel to the ignition circuit.
  • other electronic components such as resistors, coils, capacitors can also be used etc. can also be arranged on the chip.
  • Fig. 1 shows the complete ignition / ignition element in section.
  • a sleeve-shaped Housing 1 is arranged as a base plate, a metal body 7, through which pins or pins 5 are guided as electrical supply lines.
  • the metal body 7 holes 8, in each of which a glass bushing 6 is inserted through the pins 5 are guided.
  • the glass bushing 6 insulates the pins 5 from one another the metal body 7.
  • the ignition bridge of the ignition / ignition element is on a chip 2 arranged, which rests on the metal body 7. Chip 2 will be detailed later described.
  • the pins or pins 5 are guided up to the chip 2 and protrude the chip 2 even something.
  • the pins 5 are connected to the soldering or bonding Chip 2 electrically connected.
  • a plastic body 9 is form-fitting with the metal body 7 connected and completely fills the peripheral wall of the housing 1.
  • the chip 2 in the A bottle neck-shaped indentation 16 is arranged inside the plastic body 9, the chip 2 being located at the lower end.
  • the ignition / ignition element or primer is a compact unit that is resistant to mechanical, thermal and climatic influences. That’s it Ignition / ignition element extremely reliable. Through the metallic sheathing the sleeve-shaped housing 1 and the subsequent application of the sealing compound 12, as well as through the dense glass bushing 6, is the ignition / ignition element absolutely tight!
  • the type area can be used to increase the mechanical strength against sentence breakouts or the primer 4 are additionally protected by a cover 18, if necessary.
  • the introduction of the ignition charges 4a, 4b can be carried out both in the dry and in the wet condition - with subsequent drying. Which type is chosen is of the sentence types and the associated economically meaningful contribution dependent.
  • Set types and set quantities depend on the respective application and can accordingly can be varied. It is also quite possible to use the ignition / ignition element can only be filled with one record type. This has the advantage that the handling costs are lower are than when introducing two types of sets 4a, 4b.
  • FIGS. 2a, b An essential feature is the positive connection of the plastic body 9 with the metal part 7. This is shown particularly well in FIGS. 2a, b, which the metal body 7 with inserted pins 5 in the glass bushing 6 shows.
  • the pins 5 are from the metal body 7 electrically insulated by the glass bushing 6 or the glass inserts and are so tight against moisture during storage and prevent the Gas when the ignition / ignition element is ignited.
  • the metal body 7 has an ignition charge on it (not shown in Fig. 2) directed end with a reduced diameter circumferential groove 10.
  • this groove 10 are at least two openings 11 to the Bores 8 introduced above the glass bushings 6. This allows the Plastic of the plastic body along the drawn-in wall 19 into the groove 10 and from there penetrate through the openings 11 into the bores 8 and fill them.
  • Fig. 1 shows the result, namely an extremely strong and durable and therefore tight coupling of the plastic body 9 to the metal body 7.
  • the top of the metal part 7 and the pins 5 should be designed so that the Chip 2 can be permanently connected electrically. This is e.g. a layer of tin on the pins 5 when the chip 2 is contacted by soldering, or a Gold layer on pins 5 when the chip connection is made by bonding becomes.
  • the chip 3 shows a plan view of the chip 2.
  • the chip 2 has a gold layer as the surface 13.
  • the semicircular bulges 20 serve to receive the pins 5, which are connected to the gold layer 13.
  • There is a resistance track across the surface 14 applied. This resistance path 14 is formed by laser cuts 15 so separated from the gold layer 13 that only one ignition bridge 3 remains.
  • the ignition bridge geometry can be cut variably with the laser cut 15 and thus a wide range can be manufactured inexpensively. In practice it is necessary, because it enables the realization of the required different electrical Functional data is possible. Other parameters to ensure functionality the required performance data are the layer thickness and the materials that are preferably applied with the sputtering process.
  • the resistance track 14 and thus the ignition bridge 3 is in a special embodiment made of an exothermic material, e.g. Magnesium or zirconium or an alloy of these substances.
  • One way to avoid unwanted triggering by means of interference pulses, High-frequency radiation etc. consists in designing the chip 2 as a capacitor, which is connected in parallel to the ignition circuit. This can be achieved that the back of the chip 2 is metallized accordingly.
  • Fig. 4 shows the unit metal body 7 with inserted pins 5 and connected Chip 2 in section (Fig. 4a) and in plan view from above (Fig. 4b).
  • the chip 2 is electrically connected to the pins 5 by means of soldering 21.
  • the chip 2 lies flat on the surface of the Metal body 7 and has 2 half holes 20 which are filled by the pins 5. This can both fix the two components during assembly as well as a subsequent secure electrical connection can be achieved.
  • the Connection can be by means of soldering, a bond connection or another suitable one Way.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Fuses (AREA)
  • Control Of Combustion (AREA)
  • Packaging Frangible Articles (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

An igniting/firing element includes a casing (1) receiving electrical junction lines connected to an igniting jumper (3) on a chip (2) provided with at least one igniting unit (4a, 4b). In order to allow for the element to be universally used and to avoid uncontrolled discharge, it is suggested that the junction lines be designed in the form of pins, which are led to the casing (1) through a glass seal, and that the casing bottom (1) be a metal body (7) in which bores (8) are provided for said glass seals (6) to pass through, and that the metal body be positive-fit to the plastic body (9) covering the peripheral wall of the casing (1) and wrapping the pin tops (5) emerging from the glass seal (6).

Description

Die Erfindung betrifft ein Zünd-/ Anzündelement nach dem Oberbegriff des Anspruchs 1.The invention relates to an ignition / ignition element according to the preamble of the claim 1.

Aus der DE 38 83 266 T2 ist eine Zündeinheit für die Auslösung von Detonatoren bekannt. Die Zündeinheit besteht aus einem elektrisch betätigbaren Zünd- bzw. Schmelzkopf, einer Stromquelle, die mit dem Zündkopf über eine Schalteinrichtung verbunden ist und einer Elektronikeinheit. Die Elektronikeinheit weist zumindest einen Chip, hergestellt aus einem Halbleitermaterial und mit einer Mikroschaltung versehen, auf. Der Chip trägt einen Zündkopf bzw. eine Zündbrücke auf seiner Oberfläche. Der Anzündsatz ist direkt auf die Zündbrücke aufgebracht.An ignition unit for triggering detonators is known from DE 38 83 266 T2. The ignition unit consists of an electrically operated ignition or Melting head, a power source connected to the ignition head via a switching device is connected and an electronic unit. The electronics unit has at least one Chip, made of a semiconductor material and provided with a microcircuit, on. The chip carries an ignition head or an ignition bridge on its surface. The Ignition charge is applied directly to the ignition bridge.

Der Erfindung liegt die Aufgabe zugrunde, ein Zünd-/ Anzündelement nach dem Oberbegriff des Anspruchs 1 zu schaffen, welches aufgrund seiner kompakten Bauweise universell eingesetzt werden kann und bei dem bei der Zündung des Zünd-/ Anzündelements ein unkontrolliertes Abblasen vermieden ist.The invention is based, an ignition / ignition element according to the task Generic preamble of claim 1, which due to its compact design can be used universally and in which when the ignition / Ignition element an uncontrolled blowing is avoided.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst. According to the invention, this object is achieved by the features of claim 1.

Die Wirkungsweise des Zünd- /Anzündelements ist wie folgt: beim Anlegen einer elektrischen Spannung an den beiden Pins erfolgt ein Stromfluß durch das Zünd-/ Anzündelement und die elektrische Energie wird in der Zündbrücke in thermische Energie umgewandelt; die Zündbrücke erhitzt sich. Der auf der Zündbrücke aufgebrachte Anzündsatz wird dadurch initiiert und durch den bei der Umsetzung des Anzündsatzes bzw. der Anzündsätze entstehenden Gasdruck wird ein abgepreßter Boden des Gehäuses aufgebrochen. Durch diese Öffnung können dann die heißen Gase und Partikel entweichen, um eine nachgeschaltete Ladung anzuzünden.The principle of operation of the ignition / ignition element is as follows: when one is put on electrical voltage at the two pins, a current flows through the ignition / ignition element and the electrical energy is converted into thermal energy in the ignition bridge converted; the ignition bridge heats up. The one on the ignition bridge Ignition rate is initiated and by the implementation of the ignition rate or the gas pressure resulting from the ignition charges becomes a pressed bottom of the housing broken up. The hot gases and particles can then pass through this opening escape to ignite a downstream charge.

Zur dauerhaft haltbaren Ankopplung des Kunststoffkörpers an den Metallkörper weist der Metallkörper an seinem zum Anzündsatz gerichteten Ende einen verringerten Durchmesser mit einer umlaufenden Nut auf. In dieser Nut sind zumindest zwei Durchbrüche zu den Bohrungen oberhalb der Glasdurchführungen eingebracht. Beim Anspritzen bzw. Anformen des Kunststoffkörpers umgreift dieser den Bereich des geringeren Durchmessers des Metallkörpers und dringt über die Nut und die Durchbrüche in die Bohrungen ein und füllt diese oberhalb der Glasdurchführungen vollständig aus. Hierdurch ist eine optimale Verbindung erreicht.For permanently durable coupling of the plastic body to the metal body the metal body at its end facing the igniter reduced diameter with a circumferential groove. At least in this groove introduced two openings to the holes above the glass bushings. When the plastic body is molded or molded on, it engages around the Range of the smaller diameter of the metal body and penetrates through the groove and the openings in the holes and fill them above the glass bushings completely out. This ensures an optimal connection.

Das Gehäuse ist zweckmäßigerweise hülsenförmig ausgebildet, wobei der Metallkörper die untere Bodenplatte bildet. Das Gehäuse umfaßt dabei vorteilhafterweise den Kunststoffkörper und den Metallkörper und ist am unteren Ende des Metallkörpers mit diesem über eine Bördelung und eine Vergußmasse verbunden.The housing is expediently sleeve-shaped, the metal body forms the lower base plate. The housing advantageously includes the Plastic body and the metal body and is at the bottom of the metal body with this connected by a flare and a potting compound.

In vorteilhafter Ausgestaltung liegt der Chip auf dem Metallkörper auf.In an advantageous embodiment, the chip rests on the metal body.

Erfindungsgemäß weist der Chip auf seiner Vorderseite eine leitende Oberfläche auf, auf die zumindest eine Widerstandsbahn aufgebracht ist, die durch Laserschnitte in der leitenden Oberfläche so von dieser abgetrennt ist, daß sich zumindest eine Zündbrücke mit den erforderlichen Widerstandswerten ergibt. Laserschnitte bewirken, daß bestimmte Bereiche der leitenden Oberfläche abgetragen werden. According to the invention, the chip has a conductive surface on its front side, onto which at least one resistance track is applied, which is laser cut in the conductive surface is so separated from it that there is at least one ignition bridge with the required resistance values. Laser cuts cause certain areas of the conductive surface are removed.

Zur Unterstützung des Zünd- und Anzündvorgangs ist es vorteilhaft, ein Zündbrükkenmaterial zu verwenden, das beim Zünden eine exotherme Reaktion einleitet. Hierfür ist z.B. Magnesium oder Zirkonium oder eine Legierung hiervon geeignet. Dies hat den Vorteil, daß der Anzündsatz nicht mehr mechanisch fest auf der Zündbrücke aufgepreßt sein muß, da die Zündbrücke nach Initiierung selbst eine exotherme Reaktion ausführt.To support the ignition and ignition process, it is advantageous to use a spark plug material to be used, which initiates an exothermic reaction when ignited. For this, e.g. Magnesium or zirconium or an alloy thereof is suitable. This has the advantage that the ignition charge is no longer mechanically fixed on the ignition bridge must be pressed on, since the ignition bridge itself initiates an exothermic reaction executes.

Eine Möglichkeit zur Vermeidung der ungewollten Auslösung durch Störimpulse, Hochfrequenz-Einstrahlung etc. besteht darin, einen Kondensator parallel zum Zündkreis zu schalten. Vorteilhafterweise ist daher die Rückseite des Chips metallisiert, so daß der Chip in Verbindung mit der leitenden Oberfläche auf der Vorderseite einen Kondensator bildet und dieser Kondensator parallel zum Zündkreis geschaltet ist. Natürlich können auch andere elektronische Bauteile, wie Widerstände, Spulen, Kondensatoren etc. zusätzlich auf dem Chip angeordnet werden.One way to avoid unwanted triggering by interference pulses, High frequency radiation etc. consists of a capacitor parallel to the ignition circuit to switch. The back of the chip is therefore advantageously metallized, so that the chip in connection with the conductive surface on the front Forms capacitor and this capacitor is connected in parallel to the ignition circuit. Of course, other electronic components such as resistors, coils, capacitors can also be used etc. can also be arranged on the chip.

Weitere Merkmale der Erfindung ergeben sich aus den Figuren, die nachfolgend beschrieben sind. Es zeigt:

Fig. 1
einen Schnitt durch ein erfindungsgemäßes Zünd-/ Anzündelement,
Fig. 2
einen Metallkörper mit eingesetzten Pins im Schnitt (Fig. 2a) und in einer um 90° zu Fig. 2a gedrehten Ansicht (Fig. 2b),
Fig. 3
eine Draufsicht auf einen Chip und
Fig. 4
einen Metallkörper mit aufgesetztem Chip im Schnitt (Fig. 4a) und in Draufsicht von oben (Fig. 4b).
Further features of the invention result from the figures, which are described below. It shows:
Fig. 1
2 shows a section through an ignition / ignition element according to the invention,
Fig. 2
a metal body with inserted pins in section (Fig. 2a) and in a view rotated by 90 ° to Fig. 2a (Fig. 2b),
Fig. 3
a top view of a chip and
Fig. 4
a metal body with attached chip in section (Fig. 4a) and in plan view from above (Fig. 4b).

Fig. 1 zeigt das komplette Zünd-/ Anzündelement im Schnitt. In einem hülsenförmigen Gehäuse 1 ist als Bodenplatte ein Metallkörper 7 angeordnet, durch welchen Stifte oder Pins 5 als elektrische Zuführleitungen geführt sind. Hierzu weist der Metallkörper 7 Bohrungen 8 auf, in denen jeweils eine Glasdurchführung 6 eingelassen ist, durch die die Stifte 5 geführt sind. Die Glasdurchführung 6 isoliert die Stifte 5 gegenüber dem Metallkörper 7. Die Zündbrücke des Zünd-/ Anzündelements ist auf einem Chip 2 angeordnet, der auf dem Metallkörper 7 aufliegt. Der Chip 2 wird später noch eingehend beschrieben. Die Stifte bzw. Pins 5 sind bis zum Chip 2 geführt und überragen den Chip 2 sogar etwas. Über eine Lötung oder Bondung sind die Stifte 5 mit dem Chip 2 elektrisch verbunden. Ein Kunststoffkörper 9 ist formschlüssig mit dem Metallkörper 7 verbunden und füllt die Umfangswand des Gehäuses 1 vollständig aus. Im Inneren des Kunststoffkörpers 9 ist eine flaschenhalsförmige Einbuchtung 16 angeordnet, wobei sich am unteren Ende der Chip 2 befindet. Auf dem Chip 2 bzw. der Zündbrücke ist ein Anzündsatz 4a und darüber ein zweiter Anzündsatz 4b aufgebracht. Auf der Oberseite des Gehäuses 1 weist dieses eine Abplattung 17 als Sollbruchstelle auf. Über eine Bördelung 21 und eine Vergußmasse 12 an der unteren Bodenplatte ist das Gehäuse 1 mit dem Metallkörper 7 verbunden.Fig. 1 shows the complete ignition / ignition element in section. In a sleeve-shaped Housing 1 is arranged as a base plate, a metal body 7, through which pins or pins 5 are guided as electrical supply lines. For this purpose, the metal body 7 holes 8, in each of which a glass bushing 6 is inserted through the pins 5 are guided. The glass bushing 6 insulates the pins 5 from one another the metal body 7. The ignition bridge of the ignition / ignition element is on a chip 2 arranged, which rests on the metal body 7. Chip 2 will be detailed later described. The pins or pins 5 are guided up to the chip 2 and protrude the chip 2 even something. The pins 5 are connected to the soldering or bonding Chip 2 electrically connected. A plastic body 9 is form-fitting with the metal body 7 connected and completely fills the peripheral wall of the housing 1. in the A bottle neck-shaped indentation 16 is arranged inside the plastic body 9, the chip 2 being located at the lower end. On chip 2 or the Firing bridge is an ignition charge 4a and a second ignition charge 4b is applied above it. On the top of the housing 1, this has a flattening 17 as a predetermined breaking point on. Via a flange 21 and a potting compound 12 on the lower Base plate, the housing 1 is connected to the metal body 7.

Das Zünd-/ Anzündelement bzw. das Anzündhütchen ist eine kompakte Einheit, die resistent ist gegen mechanische, thermische und klimatische Einflüsse. Damit ist das Zünd-/ Anzündelement extrem zuverlässig. Durch die metallische Ummantelung mittels des hülsenförmigen Gehäuses 1 und der nachträglichen Aufbringung der Vergußmasse 12, sowie durch die dichte Glasdurchführung 6, ist das Zünd-/ Anzündelement absolut dicht!The ignition / ignition element or primer is a compact unit that is resistant to mechanical, thermal and climatic influences. That’s it Ignition / ignition element extremely reliable. Through the metallic sheathing the sleeve-shaped housing 1 and the subsequent application of the sealing compound 12, as well as through the dense glass bushing 6, is the ignition / ignition element absolutely tight!

Zur Erhöhung der mechanischen Festigkeit gegen Satzausbrechung kann der Satzspiegel bzw. der Anzündsatz 4 durch eine Abdeckung 18 zusätzlich geschützt werden, wenn erforderlich.The type area can be used to increase the mechanical strength against sentence breakouts or the primer 4 are additionally protected by a cover 18, if necessary.

Das Einbringen der Anzündsätze 4a, 4b kann sowohl im trockenen als auch im feuchten Zustand - mit nachfolgender Trocknung - erfolgen. Welche Art gewählt wird, ist von den Satztypen und der damit verbundenen wirtschaftlich sinnvollen Einbringung abhängig. The introduction of the ignition charges 4a, 4b can be carried out both in the dry and in the wet condition - with subsequent drying. Which type is chosen is of the sentence types and the associated economically meaningful contribution dependent.

Satztypen und Satzmengen sind vom jeweiligen Einsatzfall abhängig und können entsprechend variiert werden. Auch ist es durchaus möglich, das Zünd-/ Anzündelement nur mit einer Satztype zu befüllen. Dies hat den Vorteil, daß die Handlingkosten geringer sind als beim Einbringen von zwei Satztypen 4a, 4b.Set types and set quantities depend on the respective application and can accordingly can be varied. It is also quite possible to use the ignition / ignition element can only be filled with one record type. This has the advantage that the handling costs are lower are than when introducing two types of sets 4a, 4b.

Ein wesentliches Merkmal ist die formschlüssige Verbindung des Kunststoffkörpers 9 mit dem Metallteil 7. Dies zeigt besonders gut Fig. 2a, b, die den Metallkörper 7 mit eingesetzten Stiften 5 in der Glasdurchführung 6 zeigt. Die Stifte 5 sind vom Metallkörper 7 durch die Glasdurchführung 6 bzw. die Glaseinsätze elektrisch isoliert und sind so dicht gegen Feuchtigkeit bei der Lagerung und verhindern ein Entweichen des Gases bei Zündung des Zünd-/ Anzündelements.An essential feature is the positive connection of the plastic body 9 with the metal part 7. This is shown particularly well in FIGS. 2a, b, which the metal body 7 with inserted pins 5 in the glass bushing 6 shows. The pins 5 are from the metal body 7 electrically insulated by the glass bushing 6 or the glass inserts and are so tight against moisture during storage and prevent the Gas when the ignition / ignition element is ignited.

Zur formschlüssigen Ankopplung hat der Metallkörper 7 an seinem zum Anzündsatz (in Fig 2 nicht gezeigt) gerichteten Ende einen verringerten Durchmesser mit einer umlaufenden Nut 10. In dieser Nut 10 sind zumindest zwei Durchbrüche 11 zu den Bohrungen 8 oberhalb der Glasdurchführungen 6 eingebracht. Hierdurch kann der Kunststoff des Kunststoffkörpers entlang der eingezogenen Wand 19 in die Nut 10 und von dort über die Durchbrüche 11 in die Bohrungen 8 eindringen und diese ausfüllen. Fig. 1 zeigt das Ergebnis, nämlich eine extrem feste und dauerhafte und damit dichte Ankopplung des Kunststoffkörpers 9 an den Metallkörper 7.For a form-fitting coupling, the metal body 7 has an ignition charge on it (not shown in Fig. 2) directed end with a reduced diameter circumferential groove 10. In this groove 10 are at least two openings 11 to the Bores 8 introduced above the glass bushings 6. This allows the Plastic of the plastic body along the drawn-in wall 19 into the groove 10 and from there penetrate through the openings 11 into the bores 8 and fill them. Fig. 1 shows the result, namely an extremely strong and durable and therefore tight coupling of the plastic body 9 to the metal body 7.

Die Oberseite des Metallteils 7 und der Stifte 5 sollte so ausgelegt werden, daß der Chip 2 elektrisch dauerhaft angeschlossen werden kann. Dies ist z.B. eine Zinnschicht auf den Stiften 5, wenn der Chip 2 mittels Lötung kontaktiert wird, oder eine Goldschicht auf den Stiften 5, wenn die Chipverbindung mittels Bondung hergestellt wird.The top of the metal part 7 and the pins 5 should be designed so that the Chip 2 can be permanently connected electrically. This is e.g. a layer of tin on the pins 5 when the chip 2 is contacted by soldering, or a Gold layer on pins 5 when the chip connection is made by bonding becomes.

Fig. 3 zeigt eine Draufsicht auf den Chip 2. Der Chip 2 hat als Oberfläche eine Goldschicht 13. Die halbkreisförmigen Ausbuchtungen 20 dienen zur Aufnahme der Stifte 5, die mit der Goldschicht 13 verbunden werden. Quer auf der Oberfläche ist eine Widerstandsbahn 14 aufgebracht. Durch Laserschnitte 15 ist diese Widerstandsbahn 14 so von der Goldschicht 13 abgetrennt, daß nur eine Zündbrücke 3 übrig bleibt.3 shows a plan view of the chip 2. The chip 2 has a gold layer as the surface 13. The semicircular bulges 20 serve to receive the pins 5, which are connected to the gold layer 13. There is a resistance track across the surface 14 applied. This resistance path 14 is formed by laser cuts 15 so separated from the gold layer 13 that only one ignition bridge 3 remains.

Mit dem Laserschnitt 15 kann die Zündbrückengeometrie variabel geschnitten werden und somit eine breites Spektrum kostengünstig gefertigt werden. In der Praxis ist dies notwendig, da damit die Realisierung der geforderten unterschiedlichen elektrischen Funktionsdaten möglich ist. Weitere Parameter zur Sicherstellung der Funktionsfähigkeit bei den geforderten Leistungsdaten sind die Schichtdicke und die Materialien, die vorzugsweise mit dem Sputterverfahren aufgebracht werden.The ignition bridge geometry can be cut variably with the laser cut 15 and thus a wide range can be manufactured inexpensively. In practice it is necessary, because it enables the realization of the required different electrical Functional data is possible. Other parameters to ensure functionality the required performance data are the layer thickness and the materials that are preferably applied with the sputtering process.

Die Widerstandsbahn 14 und damit die Zündbrücke 3 besteht in besonderer Ausführungsform aus einem exotherm reagierenden Material, wie z.B. Magnesium oder Zirkonium oder einer Legierung dieser Stoffe.The resistance track 14 and thus the ignition bridge 3 is in a special embodiment made of an exothermic material, e.g. Magnesium or zirconium or an alloy of these substances.

Eine Möglichkeit zur Vermeidung der ungewollten Auslösung mittels Störimpulsen, Hochfrequenz-Einstrahlungen etc. besteht darin, den Chip 2 als Kondensator auszubilden, der parallel zum Zündkreis geschaltet wird. Dies kann dadurch erreicht werden, daß die Rückseite des Chips 2 entsprechend metallisiert wird.One way to avoid unwanted triggering by means of interference pulses, High-frequency radiation etc. consists in designing the chip 2 as a capacitor, which is connected in parallel to the ignition circuit. This can be achieved that the back of the chip 2 is metallized accordingly.

Fig. 4 zeigt die Baueinheit Metallkörper 7 mit eingesetzten Stiften 5 und angeschlossenem Chip 2 im Schnitt (Fig. 4a) und in Draufsicht von oben (Fig. 4b).Fig. 4 shows the unit metal body 7 with inserted pins 5 and connected Chip 2 in section (Fig. 4a) and in plan view from above (Fig. 4b).

In dieser Anordnung ist der Chip 2 mittels Lötung 21 mit den Stiften 5 elektrisch verbunden. Wie aus der Figur ersichtlich ist, liegt der Chip 2 plan auf der Oberfläche des Metallkörpers 7 auf und hat 2 Halbbohrungen 20, die von den Stiften 5 ausgefüllt werden. Damit kann sowohl eine Fixierung der beiden Komponenten während der Montage als auch eine nachfolgende sichere elektrische Verbindung erreicht werden. Die Verbindung kann mittels Lötung, einer Bondverbindung oder auf eine andere geeignete Art und Weise erfolgen.In this arrangement, the chip 2 is electrically connected to the pins 5 by means of soldering 21. As can be seen from the figure, the chip 2 lies flat on the surface of the Metal body 7 and has 2 half holes 20 which are filled by the pins 5. This can both fix the two components during assembly as well as a subsequent secure electrical connection can be achieved. The Connection can be by means of soldering, a bond connection or another suitable one Way.

Claims (6)

  1. Fuse/firing element having a housing (1) into which electrical connection leads that are connected to an ignition bridge (3) which is arranged on a chip (2) and on which at least one firing charge (4a, 4b) is deposited, with the connection leads being pins (5) which are guided through a glass bushing (6) into the housing (1), and with a metal body (7) forming the base of the housing (1) and this metal body (7) having bores (8) into which the glass bushings (6) are let, characterized in that the metal body (7) is connected in a form-locking manner to a plastics body (9) which the peripheral wall of the housing (1) covers and which encases the ends of the pins (5) which project out of the glass bushing (6), and the metal body (7), at its end that is directed towards the firing charge (4a, 4b), has a reduced diameter with a circumferential groove (10), and at least two openings (11) to the bores (8) are introduced into this groove (10) above the glass bushings (6).
  2. Fuse/firing element according to claim 1, characterized in that the housing (1) envelops the plastics body (9) and the metal body (7) and at the lower end of the metal body (7) is connected to the latter by way of a beading (21) and a cast composition compound (12).
  3. Fuse/firing element according to claim 1 or 2, characterized in that the chip (2) rests upon the metal body (7).
  4. Fuse/firing element according to one of claims 1 to 3, characterized in that the chip (2) has a conductive surface (13) onto which at least one resistance path (14) is deposited that is separated from the conductive surface (13) by means of laser cuts (15) in the latter in such a way that at least one ignition bridge (3) results with the necessary resistance values.
  5. Fuse/firing element according to claim 4, characterized in that the resistance path (14) and thus the ignition bridge (3) are made of an exothermally reactive material, such as, for example, magnesium or zirconium or an alloy thereof.
  6. Fuse/firing element according to claim 4 or 5, characterized in that the rear side of the chip (2) is metallized and thus the chip (2) in combination with the conductive surface (13) on the front side forms a capacitor and this capacitor is connected in parallel with the ignition circuit.
EP97944872A 1996-09-14 1997-09-11 Igniting/firing element with an igniting jumper on a chip Expired - Lifetime EP0925480B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19637587 1996-09-14
DE19637587A DE19637587A1 (en) 1996-09-14 1996-09-14 Ignition / ignition element with an ignition bridge arranged on a chip
PCT/EP1997/004976 WO1998011400A1 (en) 1996-09-14 1997-09-11 Igniting/firing element with an igniting jumper on a chip

Publications (2)

Publication Number Publication Date
EP0925480A1 EP0925480A1 (en) 1999-06-30
EP0925480B1 true EP0925480B1 (en) 2001-12-05

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EP97944872A Expired - Lifetime EP0925480B1 (en) 1996-09-14 1997-09-11 Igniting/firing element with an igniting jumper on a chip

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US (1) US6262875B1 (en)
EP (1) EP0925480B1 (en)
JP (1) JP4030130B2 (en)
KR (1) KR100614121B1 (en)
CN (1) CN1080410C (en)
AT (1) ATE210271T1 (en)
BR (1) BR9712821A (en)
CA (1) CA2265585A1 (en)
CZ (1) CZ298386B6 (en)
DE (2) DE19637587A1 (en)
ES (1) ES2165093T3 (en)
PL (1) PL183951B1 (en)
RU (1) RU2196292C2 (en)
TR (1) TR199900564T2 (en)
WO (1) WO1998011400A1 (en)

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Also Published As

Publication number Publication date
JP4030130B2 (en) 2008-01-09
JP2001500602A (en) 2001-01-16
WO1998011400A1 (en) 1998-03-19
DE59705692D1 (en) 2002-01-17
PL332160A1 (en) 1999-08-30
KR100614121B1 (en) 2006-08-22
EP0925480A1 (en) 1999-06-30
CN1230252A (en) 1999-09-29
CZ298386B6 (en) 2007-09-19
BR9712821A (en) 1999-11-23
PL183951B1 (en) 2002-08-30
KR20000036083A (en) 2000-06-26
DE19637587A1 (en) 1998-03-19
RU2196292C2 (en) 2003-01-10
TR199900564T2 (en) 1999-06-21
CZ9900868A3 (en) 2001-06-13
CN1080410C (en) 2002-03-06
ES2165093T3 (en) 2002-03-01
CA2265585A1 (en) 1998-03-19
ATE210271T1 (en) 2001-12-15
US6262875B1 (en) 2001-07-17

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