DE19940200A1 - Pyrotechnical ignition system with integrated ignition circuit has component with flat outer surface(s) that is non-conducting in at least some areas acting as bearer for other components - Google Patents

Abstract

The system has several components electrically interconnected via a conducting track structure (2) with a housing (4,5) and an ignition device for ignition by an ignition voltage, which ignites a pyrotechnic drive charge, whereby the ignition voltage is generated and/or stored and/or switched by the components. One component (1) has at least one flat outer surface that is non-conducting in at least some areas acting as a bearer element for the other components (3), which are mounted on its surface.

Description

The invention relates to a pyrotechnic ignition system with an integrated Ignition circuit according to the preamble of claim 1.

Pyrotechnic ignition systems are used in particular to trigger In seat restraint systems, but can in principle also be used on mili field or in mining. By release a pyrotechnic propellant charge is generated by energy from the igniter ignites. The energy is supplied electrically in the form of an ignition voltage leads, generated and / or stored by electrical components becomes.

Such an ignition system is known, for example, from DE 37 17 149 C3 referred to there as the detonator ignition element. In this case too electrical components, in particular an electronic circuit set of a surge protection device, a communication device, a timer and lockout circuit and a self-test module contains. An ignition capacitor is used for energy storage its large size is not integrated into the circuit, but as one separate component is executed.

For ignition systems with integrated ignition circuits without an ignition capacitor, as described, for example, in DE 196 53 115 A1 and the article by Willis, K: An introduction to semiconductor initiation of electro-explosive devices, in: 2nd international symposium on sophisticated car occupant safety systems , airbag 2000, Karlsruhe 1994 , pp. 42-1 to 42-9 are presented, the ignition energy must be supplied at the time of triggering the integrated circuit in the ignition system, whereby the available ignition energy, the release speed and release safety is reduced.

The patent applications DE 198 36 280 and DE 198 36 278 just describe if a controllable ignition unit with integrated electronics for Triggering a restraint system and a pyrotechnic ignition element, the subject of the application being the shielding of the Circuit before the effects of the explosion is. The circuit is included each arranged on a circuit board support element.  

DE 196 53 115 A1 provides an ignition unit for igniting a pyrotech African propellant charge, in addition to an electrically ignitable detonator also an ignition energy storage and a locking unit in common is integrated on a semiconductor chip, with the locking unit on due to an unlocking signal the discharge of the energy storage causes the electric igniter. Energy storage using semiconductors capacitors, however, is not out for at least a number of detonators reaching.

The integration of electrical components in a pyrotechnic ignition element is also the subject of DE 196 10 799 C1, where there is one Metal tape punched out a conductor track structure and three-dimensional ge is bent, these conductor tracks with a cuboid support body are overmolded, with subsequent recesses in the carrier body Components can be used that ver with the conductor tracks be bound. The large-scale ignition energy capacitor is in a space is stowed in a space-saving manner within the carrier body. As well an integrated circuit for triggering is provided. After that we do the construction group enclosed by a housing. The effort for the production of such an igniter and the susceptibility to failure due to filigree construction is enormous.

The object of the invention is therefore a further pyrotechnic ignition system with integrated ignition circuit, which is very space is economical and also easy and inexpensive to manufacture.

This object is achieved through the characteristic features of the patent claim 1 solved. Advantageous further developments are the subclaims refer to.

The basic idea of the invention is directly on a flat exterior area of the capacitor arrangement, the other components, in particular to arrange the circuit of the ignition circuit. This solution eliminates an otherwise usually provided in the form of a printed circuit board or in the DE 196 10 799 C1 cuboidal additional support element, which, in addition to saving material, in particular also requires space is reduced. This reduces the space and material requirements, simplifies the Manufacturing and thus increases reliability.  

The other components, in particular the circuit, can be simple and securely attached to the capacitor assembly, for example be stuck on, whereby also a direct electrical connection between the two is possible.

Contact zones are formed on the top of the circuit to which the circuit has a conductor structure with external connections conclusions is connected. The capacitor arrangement can either by additional contact zones on the top of the circuit or through Contact zones on the underside of the circuit.

The conductor track structure can be easily inserted through metallic insertion parts be formed in the housing or on the housing or not itself evaporated conductive outer surfaces of the capacitor arrangement, be deposited or glued on.

The invention is described below using exemplary embodiments and Figures explained in more detail.

Brief description of the figures:

Fig. 1 exploded view of an assembly with a condenser arrangement with condensers and components deposited thereon and the housing

Fig. 2 top of the capacitor arrangement and the interconnects, circuits and ignition layer arranged thereon

Fig. 3 bottom of the capacitor assembly with contact zones to the lower housing part

Fig. 4 section through an embodiment with ignition layer on the surface of the ignition capacitor

Fig. 5 section through an embodiment with an ignition layer on the surface of the integrated circuit

Fig. 6 pyrotechnic ignition system with a capacitor arrangement in a housing, mounted on this a circuit and with a housing with injected insert parts partially cut out sketchy

Fig. 7 exploded view of the embodiment according to the Fig. 6

Fig. 8 exploded view of a further embodiment also with a plane formed by inserts wiring pattern

Fig. 9 sketchy representation of a completed assembly with a plug contact area with visualization of the pyrotechnic ignition system arranged therein

Each of the configurations shown in the figures basically has the following basic components, a capacitor arrangement 1 , in particular an ignition capacitor, a conductor track structure 2 , construction elements, in particular a circuit 3 , a lower housing part 4 , an upper housing part 5 , an ignition layer 6 and a propellant charge 7 . The basic components have been provided with the same reference numerals in all figures and details of these basic components are generally designated by adding another number.

Fig. 1 shows a disassembled pyrotechnic ignition system, as for example, is intended for use in gas generators of occupant protection systems. The pyrotechnic ignition system consists of an ignition circuit consisting of a capacitor arrangement 1 , in particular the ignition capacitor, interconnects 2 , a circuit 3 and an ignition layer 6 , on which ignition of the separately shown propellant charge 7 of the igniter is effected by impressing electrical energy.

The capacitor arrangement 1 with at least one of the flat, even non-conductive outer surfaces 11 , 12 , 13 serves as the carrier element for the ignition circuit, in this exemplary embodiment, in addition to the components, the interconnect structure 2 is also arranged on the outer surface (s) 11 , 12 , 13 . The capacitor arrangement 1 is currently being used as the carrier element, since this usually has flat, non-conductive outer surfaces 11 , 12 , 13 and the largest dimensions of all components. In addition, such a capacitor arrangement 1 is often made of dielectric material, for example ceramic-plate capacitor, on which the interconnects 2 can be applied particularly easily using known thick or thin film technology or also by vapor deposition.

By using the capacitor arrangement 1 consisting at least of the ignition capacitor as a carrier element for the other components 3 and the interconnects 2 , an extremely compact and small assembly is created, as can be seen in FIG. 1.

This ignition system is enclosed by a two-part housing 4 , 5 , the lower housing part 4 in addition to joining elements 44 with the upper housing part 5 having a receiving chamber 41 for the assembly and, in this exemplary embodiment, contact tongue-shaped contact elements 42 , via which the ignition system can be connected to a connecting cable 43 . For this purpose, the capacitor arrangement 1 on the underside 12 has contact zones 26 , which are shown in FIG. 3. It should be emphasized that the contact elements 42 thus directly contact the contact zones 26 formed out of the conductor track structure, that is to say it does not require any plug-socket connections or the like. The contact elements 42 are welded pressure-tight in the lower housing part 4 or injects from this. It is also preferred that the ignition system is enclosed in a pressure-tight manner by the housing 4 , 5 , by inserting it into the receiving chamber 41 , 57 of the housing 4 , 5 with dimensional accuracy and locking it there preferably by welding, soldering, pressing, crimping or adhesive connections . The pressure tightness on the one hand protects the ignition system from external influences, in particular moisture, and also enables a pressure build-up during ignition, which is then discharged in a targeted manner through an outflow opening 54 in the upper part 5 of the housing, which is initially closed by a pressure membrane 53 .

The embodiments in FIGS. 1 to 5 have interconnects 21 on the capacitor arrangement 1, which arrangement in this embodiment, both the further components 3 with one another and with the capacitor 1, and connect with terminals 24 for the ignition layer 6, and also interconnects 28 are arranged on the side surfaces 13 of the capacitor arrangement 1 , as can be seen in FIGS. 2 and 3. These electrically connect the elements arranged on the top 11 , that is to say interconnects 21 , components 3 and ignition layer 6, to contact zones 26 on the bottom 12 of the capacitor arrangement 1 .

As construction elements 1 is shown in each case only a simplified circuit 3 to 5 in Figs.. However, several circuits and other components, for example resistors or the like, can also be arranged on the capacitor arrangement 1 .

The top 5 of the housing has the auxiliary joining elements 44 of the lower housing side 4 associated auxiliary joining elements 51 (here, for example, designed as latching hooks and latching openings) and also a propellant charge chamber 52 in which the propellant charge 7 of the ignition system is arranged. The propellant charge chamber 52 has a discharge opening 54 which is initially closed by a pressure membrane 53 . If the ignition layer 6 is activated and this ignites the pyrotechnic propellant charge 7 , a pressure builds up within the propellant charge chamber 52 , which tears open the pressure membrane 53 and hot, burning propellant charge particles suddenly and with pressure flow through the outflow opening 54 into the gas generator, as a result of which there is a natural one significantly larger propellant charge optimized for gas generation is ignited. The propellant charge chamber 52 is preferably protected from the receiving chamber 41 for the capacitor arrangement 1 with the construction elements by a partition 55 (see in particular FIG. 9) which has an opening 56 only in the area of the ignition layer 6 .

For some of the fields of application of these ignition systems, communication circuits are to be integrated into the housing 4 , 5 . For this purpose, they can either be arranged on the underside 12 of the capacitor arrangement 1 facing away from the ignition layer 6 and propellant charge 7 , or correspondingly heat-resistant components and electrical connections can be used for this extremely short period of time. In FIG. 1 such a communication circuit could already be integrated in the IC 3 , for example, in that the IC 3 is sufficiently protected or is pressure and heat resistant. An extensive protection of the circuit / 42 possible for the capacitor arrangement 1, as shown in more detail in connection with the following figures by the very substantial separation 55 between the ignition chamber 52 and the receiving chamber 57th

In addition, the upper side 11 of the ignition capacitor 1 with the contact zones 27 is shown in FIG. 2, on which the IC 3 is placed, for example by means of flip-chip technology.

The interconnects 28 , which run laterally on the capacitor arrangement 1 , are also particularly preferably protected from one another by spark tips 22 against sparks against electrostatic discharges, as can be seen in FIGS. 2 and 3. The interconnects 28 also serve to connect the individual capacitor layers of the capacitor arrangement 1 to form a capacitor made of several plates, as is sketched in FIG. 4. In addition to energy storage, the capacitor arrangement 1 can also have other functions, in particular connected as two electrically separate capacitors, one of which is connected as an ignition capacitor and the other as a protective capacitor against ESD, EMC and similar electrical disturbances.

The sectional view in FIG. 4 illustrates once again the function of the interconnects 28 arranged on the side surfaces 13 for interconnecting the individual parallel capacitor plate coverings 15 separated from one another by dielectric material, preferably ceramic plates 14 , to one or two capacitors.

In the section of the IC 3 in FIGS. 4 and 5, the active zone 31, in which the transistors and the like are integrated, and an insulation layer 33, for example. Of silicon oxide having contact zones 34, for example. Of vapor-deposited aluminum, aligned according to the assigned contact zones 27 on the capacitor arrangement 1 outlined.

The ignition means is shown in the exemplary embodiment in FIG. 4 as a layer 6 to be applied separately to the ignition bridge connections 24, for example by thick film technology, this layer also being able to be formed in one piece with the connections from a corresponding material, for example resistance material, doped silicon or the like .

In this figure, the ignition bridge layer 6 is arranged next to the IC 3 and connected to the other components, in particular the IC 3 and the capacitor arrangement 1 , via interconnects 21 and connections 24 formed therefrom.

Alternatively, the ignition layer 6 can also be arranged in or on the IC 3 , as shown in FIG. 5. In this figure, the semiconductor-structured active layer 31 and the insulation layer 33 are also shown only sketchily, in which cross connections 32 from the top of the active layer 31 or the insulation layer 33 to connections 35 for the ignition layer 6 on the face Down-mounting overhead of the bottom of the IC 3 are provided. In this case, in particular, the ignition layer 6 can also be introduced into the substrate of the IC 3 designed as a bare chip by appropriate doping and the connections 35 can also be formed in an integrated manner.

FIGS. 6 to 9 now illustrate further embodiments in which a conventional capacitor array used with its own housing 17 and the wiring pattern 2 is formed by metallic inserts 83, 85.

Together with the preceding figures, the capacitor arrangement 1 and, in turn, the circuit arrangement 3 are arranged in a receiving chamber of the housing, here in the housing upper part 5 and designated 57.

The capacitor arrangement 1 is conventional, ie is designed as a commercially available capacitor with its own housing 17 . The advantage of this design is that, in contrast to the capacitor arrangement from FIGS. 1 to 5 provided with interconnect structures, a very inexpensive standard capacitor is now used, on which the components, in particular the circuit 3, are arranged, for example, glued in the same way.

In this example, the capacitor arrangement 1 comprises only the ignition capacitor function and has two electrical contact surfaces 16 which are insulated from one another, for example on the side surfaces, via which the capacitor coatings are connected inside. The housing 17 of the capacitor assembly 1 is formed, for example, by extrusion coating with insulation material. The contact surfaces 16 can also be drawn to the circuit 3 facing the top of the capacitor arrangement 1 , as shown in Fig. 7, so that the capacitor arrangement 1 through contact zones 34 (see Fig. 8, comparable to those from Fig. 4) on the The underside of the circuit 3 is connected directly to the circuit 3 , so that the inserts 85 provided for this in FIGS. 6, 7 and 9 can be omitted. These contact areas 34 on the bottom of the circuit 3 where the circuit 3 by vias could comparable to reference numeral 32 of FIG. 5, or by the circuit 3 outwardly along guided paths with the top be connected. If the individual plates of the capacitor arrangement are perpendicular to the housing lower part 4 , for example only that contact surface 16 then pointing to the circuit 3 could be both mechanically fastened and electrically contacted via a substrate connection of the circuit 3, for example by soldering or conductive adhesive.

The upper housing part 5 is closed by a lower housing part 4 , the joining elements 44 , 51 interlocking and both housing parts 4 , 5 locking together. The propellant charge chamber 52 with the propellant charge 7 is preferably separated by a partition 55 from the receiving chamber 57 , the partition 55 having an opening 56 in the region of the ignition layer 6 through which the ignition layer 6 can ignite the propellant charge 7 . The propellant charge chamber 52 in turn has an outflow opening 54 which is initially closed by a pressure cover 53 , for example to a gas generator of an airbag, which is no longer shown. The compactness of the ignition system is in turn based on the basic arrangement of the components, in particular the circuit 3, directly on the capacitor arrangement 1 .

The inserts 83 , 85 are preferably stamped in one piece from metal tape and bent into the corresponding shape and fixed in the material of the housing upper part 5 by extrusion coating, contact areas 81 , 82 , 84 , 86 remaining free at the ends of the inserts. For the inserts 83 , one end is guided into the exterior of the housing, where it is designed as insulation displacement contacts 81 in FIGS. 6, 7 for the direct contacting of an insulated cable or as plug contacts 82 in FIGS. 8, 9 for the Contacting with a connector, not shown. Furthermore, the inserts 85 for the capacitor arrangement 1 with contacts 84 directed towards the electrical contact surfaces 16 of the housed capacitor arrangement are seen in FIG. 9. These insert parts 85 are replaced in FIG. 8 by the direct electrical contact of the contact zones 34 of the circuit 3 with the contact surfaces 16 of the capacitor arrangement 1 .

The other ends 86 of the inserts 83 and 85 each contact the circuit 3 . Also to be emphasized is the special shape of the inner contact ends 86 and 84 , because these are preferably designed to protrude from the housing in a resilient manner, so that when the capacitor arrangement 1 is inserted with the circuit 3 arranged thereon into the upper housing part 5 and the housing is closed by the lower part 4 , The capacitor arrangement 1 with the circuit 3 arranged thereon are pressed against the contact ends 86 and 84 of the inserts 83 , 85 . In addition to mechanical fixation, this also ensures reliable electrical contact. In addition to another design of the outer contact ends as pins 82 in a plug area 58 of the upper housing part 5 , FIGS. 8 and 9 also have a special feature as a contact foil 36 , for example with a local application of conductive adhesive, the contact foil 36 being applied to the circuit 3 the contact between this and the inner contact ends 86 and 84 of the inserts 83 , 85 is improved.

This contact foil 36 either carries an ignition layer 6 itself, as in FIG. 8, or has a cutout for the ignition layer 6 underneath, as in FIG. 9.

The ignition layer 6 can in principle be arranged both on the circuit 3 and on the capacitor arrangement 1 , as has already been explained with reference to the exemplary embodiments in FIGS . 4 and 5.

Basically, the insert parts 83 , 85 can also be fastened to the inside of the housing or formed on the surface of the receiving chamber 57 by metalized tracks.

The housing parts 4 and 5 are preferably connected to one another in a pressure-tight and moisture-impermeable manner. The lower housing part 4 in FIGS. 6 and 7 has cutouts 45 for the insertion of the insert parts 85 and is then filled, for example by a casting compound, for sealing.

The separation 55 between the propellant charge chamber 52 and the receiving chamber 57 for the capacitor arrangement 1 with the circuit 3 can also be seen particularly well in FIG. 9. The partition 55 can be formed in one piece from the upper housing part 5 , which can be produced, for example, by temperature-resistant plastic injection molding. The partition 55 serves to protect the circuit 3 against the effects of temperature and pressure during the explosive erosion of the propellant charge 7. The partition 55 is only interrupted by an opening 56 directly above the ignition layer 6 so that the ignition layer 6 can ignite the propellant charge 7 .

Reference list

1

Capacitor arrangement

11

Top of the capacitor array

1

12th

Bottom of the capacitor array

1

13

Side face of the capacitor assembly

1

14

Insulation panels

15

Capacitor pads

16

electrical contact surfaces of a conventional capacitor

1

17th

Housing / insulation encapsulation of the capacitor

1

2nd

Conductor structure, evaporated on the capacitor arrangement

21

electrical interconnects between the components

22

ESD bridge tips

23

24th

Ignition bridge connections are formed from the interconnect structure on the capacitor arrangement

25th

26

Contact zones to the contact tongues

42

in the lower part of the housing

4th

27

Contact zones to the IC

3rd

28

lateral guideways

3rd

Integrated circuit as a component on the capacitor arrangement

1

31

active layer of the IC

32

Vias from the bottom to the top of the IC

3rd

33

Insulation layer with connections to the contact zones

34

34

Contact zones of the IC

3rd

to the contact zones

27

the capacitor arrangement

1

35

Connections for the ignition bridge

6

on the IC

3rd

36

Contact foil between IC

3rd

and the inserts

83

,

85

37

Contact zones of the IC

3rd

to the inserts

4th

Lower part of the housing

41

Receiving chamber in the lower part of the housing

4th

for capacitor arrangement

1

and Components

3rd

42

Contact tongues in the lower part of the housing

4th

to the contact zones

26

on the bottom

12th

the capacitor arrangement

1

43

connection cable

44

Locking elements on the lower part of the housing

45

Recess in the lower part of the housing for the insertion of the inserts

83

5

Upper part of the housing

51

Locking elements on the upper part of the housing

52

Propellant charge ignition chamber

53

Pressure membrane

54

Outflow opening to the gas generator

55

Separation between ignition chamber and receiving chamber for capacitor arrangement and IC

56

Opening in the partition

55

of the chambers

52

/

57

over the ignition layer

6

57

Storage chamber for capacitor arrangement

1

and components

3rd

in the Upper part of the housing

5

58

Plug area, formed from the upper part of the housing

5

6

Ignition layer

7

Propellant charge

8th

Inserts as a guideway structure

81

Insulation displacement connections for outer cables

82

pin-shaped connections (pins) for a plug

83

metallic inserts with molded outer connections

81

,

82

84

inner contact ends to the contact surfaces

16

the capacitor arrangement

1

85

metallic inserts in the housing

5

with contact ends

84

to the capacitor arrangement

1

86

spring-elastic protruding contact ends to the circuit

3rd

Claims (28)

1. Pyrotechnic ignition system with integrated ignition circuit, in particular for triggering an occupant restraint system, consisting of:
a capacitor arrangement ( 1 ) and further electrical construction elements, at least one integrated circuit ( 3 ), which are connected via an interconnect structure ( 2 , 8 ),
an ignition means ( 6 ) which can be ignited by means of an ignition voltage and which in turn ignites a pyrotechnic propellant charge ( 7 ), the ignition voltage being generated and / or stored by the components ( 1 , 3 ),
and an enclosing housing ( 4 , 5 ),
characterized in that
the further components, in particular the circuit ( 3 ), are arranged directly on a flat outer surface of the capacitor arrangement ( 1 ). 2. Ignition system according to claim 1, characterized in that on the top of the circuit ( 3 ) contact zones ( 37 ) are formed, to which the circuit ( 3 ) via the conductor structure ( 8 ) with external connections ( 81 , 82 ) is connected. 3. Ignition system according to claim 2, characterized in that further contact zones ( 37 ) on the top of the circuit ( 3 ) are provided, at which the circuit via the conductor structure ( 8 ) is connected to the capacitor arrangement ( 1 ). 4. Ignition system according to claim 2, characterized in that further contact zones ( 34 ) are provided on the underside of the circuit ( 3 ), on which the circuit ( 3 ) is connected to the capacitor arrangement ( 1 ). 5. Ignition system according to claim 1 to 4, characterized in that the interconnect structure ( 8 ) is formed by metallic inserts ( 83 , 85 ) in the housing ( 5 ) ( Fig. 6 - Fig. 9). 6. Ignition system according to claim 5, characterized in that the insert parts ( 83 , 85 ) in the housing ( 5 ) are fixed by extrusion coating. 7. Ignition system according to claim 6, characterized in that

• a) the housing ( 4 , 5 ) is made in two parts and the one housing part ( 5 ) has a receiving chamber ( 57 ) for the capacitor arrangement ( 1 ) with the circuit ( 3 ) arranged thereon,
• b) project in this housing part ( 5 ) contact ends ( 86 , 84 ) of the inserts ( 83 , 85 ) in this receiving chamber ( 57 ) and
• c) the capacitor arrangement ( 1 ) with the circuit arranged thereon ( 3 ) through the other housing part ( 4 ) against the contact ends ( 86 , 84 ) of the inserts ( 83 , 85 ) are pressed.

8. Ignition system according to claim 7, characterized in that the contact ends ( 86 , 84 ) of the inserts ( 83 , 85 ) are resilient. 9. Ignition system according to claim 7 or 8, characterized in that the contact ends ( 86 ) of the inserts ( 83 , 85 ) and the associated contact zones ( 37 ) on the circuit ( 3 ) are connected with a conductive adhesive or reflow soldered solder. 10. Ignition system according to claim 7 or 8, characterized in that between the contact ends ( 86 ) of the inserts ( 83 , 85 ) and the associated contact zones ( 37 ) on the circuit ( 3 ) a flexible film ( 36 ) is provided which has conductive adhesive or reflow soldered solder on both sides and electrical connections between the sides of the film. 11. Ignition system according to claim 5 to 10, characterized in that at least one group of inserts ( 83 ) is led out of the housing and there the outer connections ( 81 , 82 ) are integrally formed from the inserts ( 83 ). 12. Ignition system according to claim 11, characterized in that the outer connections formed in one piece from the insert parts ( 83 ) are formed as insulation displacement contacts ( 81 ). 13. Ignition system according to claim 11, characterized in that the one-piece molded from the insert parts ( 83 ) outer connections are formed as connecting pins ( 82 ). 14. Ignition system according to one of the preceding claims, characterized in that the ignition means is arranged as an ignition layer ( 6 ) on the top of the circuit ( 3 ). 15. Ignition system according to claim 10, characterized in that the ignition means is arranged as an ignition layer ( 6 ) on the flexible film on the circuit ( 3 ). 16. Ignition system according to one of the preceding claims, characterized in that the capacitor arrangement is designed as a standard capacitor with a housing ( 17 ) with at least one flat outer surface and electrical contact surfaces ( 16 ). 17. Ignition system according to claim 1, characterized in that the flat outer surfaces ( 11 , 12 , 13 ) of the capacitor arrangement ( 1 ) themselves are not electrically conductive and the conductor track structure ( 2 ) at least partially on these non-conductive outer surfaces ( 11 , 12 , 13th ) arranged, in particular evaporated, deposited or glued ( Fig. 1-5 ). 18. Pyrotechnic ignition system according to claim 17, characterized in that from the interconnect structure ( 2 ) contact zones ( 27 ) are formed, are connected to the associated contact zones ( 34 ) on the adjacent side of the circuit ( 3 ). 19. Pyrotechnic ignition system according to claim 18, characterized in that the circuit ( 3 ) via the contact zones ( 34 ) on the capacitor arrangement ( 1 ) is arranged in flip-chip technology. 20. Pyrotechnic ignition system according to one of claims 17 to 19, characterized in that

• a) the capacitor arrangement ( 1 ) is designed as a plate capacitor arrangement with a plurality of dielectric insulation plates ( 14 ) on which at least some metallic capacitor coatings ( 15 ) are deposited,
• b) wherein on the / the outside (s) ( 11 , 12 ) of the outer plate (s) interconnects ( 21 ) are applied and
• c) on the side surfaces ( 13 ) perpendicular to the capacitor plates, further lateral interconnects ( 28 ) are arranged and via these lateral interconnects ( 28 ) the individual capacitor coverings ( 15 ) with each other to at least one capacitor and with the other electrical components ( 3 ) are connected.

21. Pyrotechnic ignition system according to one of the preceding claims 17 to 20, characterized in that the capacitor arrangement ( 1 ) consists of two electrically separate condensers, one of which is connected as an ignition capacitor and the other as a protective capacitor against electrical interference. 22. Pyrotechnic ignition system according to one of the preceding claims 17 to 21, characterized in that the ignition means are arranged as an ignition layer ( 6 ) on the capacitor arrangement ( 1 ) and from the interconnect structure ( 2 ) contact areas ( 24 ) to this ignition layer ( 6 ) are formed . 23. Pyrotechnic ignition system according to one of the preceding claims 17 to 21, characterized in that on the top of the circuit ( 3 ) the ignition means is designed with two mutually insulated contact areas which are interconnected via a pyrotechnic ignition layer ( 6 ). 24. Pyrotechnic ignition system according to claim 23, characterized in that the ignition means is formed as a semiconductor bridge lighter and the contact areas ( 35 ) to the ignition layer ( 6 ) on the top of the unpackaged circuit ( 3 ) are designed by mutually insulated conductively doped areas . 25. Pyrotechnic ignition system according to one of the preceding claims 17 to 24, characterized in that a spark gap ( 22 ) and / or an electrical resistor for discharging electrostatic charges is formed from the guide track structure ( 2 ). 26. Pyrotechnic ignition system according to one of the preceding claims 17 to 25, characterized in that a trigger electronics arranged outside the housing is connected via an electrical connection ( 43 ) to the ignition system, contact elements ( 42 ) being provided inside the housing ( 4 ) which contact the contact zones ( 26 ) formed from the interconnect structure ( 2 ) directly. 27. Pyrotechnic ignition system according to one of the preceding claims, characterized in that the capacitor arrangement ( 1 ), the circuit ( 3 ) and the housing ( 4 , 5 ) is connected pressure-tight, in particular by means of welding, soldering, pressing, crimping - or adhesive connection. 28. Ignition system according to one of the preceding claims, characterized in that the housing ( 4 , 5 ) between the receiving chamber ( 57 , 42 ) for the capacitor arrangement ( 1 ) with the circuit ( 3 ) and a propellant charge chamber ( 52 ) in the the propellant charge ( 7 ) is arranged, has a partition ( 55 ) which is only interrupted by an opening ( 56 ) above the igniter ( 6 ) through which the igniter ( 6 ) ignites the propellant charge ( 7 ).