WO1997000526A1 - Inductive component - Google Patents

Inductive component Download PDF

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Publication number
WO1997000526A1
WO1997000526A1 PCT/DE1996/001014 DE9601014W WO9700526A1 WO 1997000526 A1 WO1997000526 A1 WO 1997000526A1 DE 9601014 W DE9601014 W DE 9601014W WO 9700526 A1 WO9700526 A1 WO 9700526A1
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WO
WIPO (PCT)
Prior art keywords
inductive component
electrically conductive
component according
insulating layer
opening
Prior art date
Application number
PCT/DE1996/001014
Other languages
German (de)
French (fr)
Inventor
Uwe Militz
Armin Germer
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1997000526A1 publication Critical patent/WO1997000526A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H01F17/0013—Printed inductances with stacked layers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors

Definitions

  • the invention is based on an inductive component according to the preamble of the main claim.
  • Inductive components are known in the form of coils, in which an electrically conductive wire is wound in several turns around a tubular body and finally the ends of the electrically conductive wire serve as connecting wires and are usually connected to contact elements which are fastened to the tubular body.
  • Such coils are usually produced by means of manual winding or winding machines.
  • the inductive component according to the invention with the characterizing features of the main claim has the advantage that the inductive component is particularly inexpensive and inexpensive to manufacture, since printing techniques or lithography techniques for
  • inductive Component can also be produced in very small dimensions, which is usually only possible with great effort in the known inductive components.
  • the inductive component can be produced together with other components at the same time on a printed circuit board, as a result of which the production costs are reduced again.
  • the inductive component can be produced particularly precisely, since its geometry can be set very precisely, in particular by high-precision methods such as photolithography.
  • the inductive component according to the invention can also be used as a coil with a core, in particular a transformer core.
  • the inductive component is particularly space-saving and similar to a wound coil if one of the ends of the conductor loops is arranged approximately above or below the opening between the conductor loops.
  • the structuring of the electrically conductive layers and / or the at least one insulating layer by means of a photolithographic process is a particularly inexpensive production process, since this process is already used for the mass production of electrical components and is therefore well controlled.
  • conductive paste and / or insulating paste for the production of the inductive component offers the advantage that the shape of the conductor loops or the insulating layer can be determined and controlled as soon as the pastes are applied. Such pastes are also very inexpensive.
  • the inductive component can be produced in a layered manner, with each layer having a particularly flat geometry. On the one hand, this simplifies the manufacturing process and on the other hand increases the accuracy with which the inductive component can be produced in relation to a desired inductance value. If the conductor loops are at least partially designed as spirals, the advantage can be achieved that fewer layers are required to obtain a given inductance. This enables very flat inductive components to be produced.
  • Figure 1 is a perspective view of all conductive
  • FIG. 2 shows a side view of an inductive component
  • Figure 3 is a cut side view of an inductive
  • Figure 4 is a perspective view of an inductive
  • Figure 5 shows an embodiment with spiral
  • a first electrically conductive layer 11 is provided, which is designed in the form of an approximately circular, open conductor loop. At one of the two ends, the first electrically conductive layer 11 has a connection element 12 in the form of a connection conductor track.
  • a plurality of further electrically conductive layers 10 are provided in several levels above the first electrically conductive layer 11, all of which are likewise in the form of an approximately circular, open one Conductor loop are formed and all have approximately the same radius as the first electrically conductive layer 11 and all are arranged approximately concentrically to the first electrically conductive layer 11.
  • the further electrically conductive layers 10 are arranged with respect to the point at which the conductor loop is opened, in each case rotated relative to one another by a small angle piece, in such a way that one of the two ends of two conductor loops lying one above the other overlap by a small amount.
  • a connecting piece 13 is arranged between the two overlapping ends of each pair of conductor loops lying one above the other. This creates an approximately coil-shaped structure.
  • the uppermost further electrically conductive layer 10 has at its still free, open end a further connecting element 14 in the form of a connecting conductor track.
  • the electrically conductive structure described in this way serves as a coil, since it conducts electrical current in circular paths and rising in an approximately helical manner between the two connecting conductor tracks 12, 14, so that a magnetic field extending axially to the central axis of the conductor loops is produced.
  • the inductive component shown in FIG. 1 is usually not produced as a free-floating structure, but rather as a layer package, insulating layers being provided between the individual electrically conductive layers 10, 11 in order to ensure proper functioning of the inductive component.
  • Such an arrangement is shown in Figure 2.
  • the first electrically conductive layer 11 with the connecting conductor track 12 is arranged on a carrier substrate 17.
  • the further electrically conductive layers 10, the layers 10, 11 each being connected to one another with the connecting pieces 13 and the uppermost further electrically conductive layer 10 having the further connecting conductor 14.
  • the recess in the opening 16 can then be realized both by etching and by mechanical removal, such as drilling or milling, but also by providing a stamp shape which is placed in the place of the opening 16 during the filling process of the insulating paste and is then pulled out .
  • photolithographic processes and printing processes can also be used.
  • the connecting piece 13 can be produced, for example, by filling the openings 16 with a conductive paste, but also, for example, by soldering or a photolithographic process.
  • FIG. 4 shows an inductive component, analogous to FIG. 3, in which an opening 19 was additionally arranged through the interior of the conductor loops.
  • This breakthrough can be produced by etching or drilling or some other method and is suitable for the implementation of, for example, a ferrite core for the inductive component.
  • the inductive component has the two connecting conductor tracks 14, 12, which are guided from the conductor loops to the edge of the inductive component, where they can be connected to connecting contacts for supplying electrical current for the inductive component, which is not shown in the figure .
  • the shape of the conductor loops of the inductive component is not limited to the circular shape, but can also include other geometries, such as an angular shape or an oval shape, but also any other open loop shapes.
  • This component can be used in particular as an SMD (Surface Mounted Device) component, preferably for HF technology.
  • the first electrically conductive layer 11, like the further electrically conductive layer 10, is designed in the form of a flat spiral, the interlocking turns of which are exemplarily rectangular in shape here.
  • the electrically conductive layers 10, left are in turn connected by means of a connecting piece 13 and connecting conductor tracks 12, 14 to form a coil-shaped structure which serves as an inductive component.
  • this structure will also be embedded in non-conductive material by producing the conductive parts by printing, photolithography, ie masking, etching, developing, coating, or other processes on or in plate-shaped insulating layers.
  • One or more circuit boards can also be used as insulating layers.

Abstract

Proposed is an inductive component with a first electrically conducting layer (11) in the form of a conducting loop, on top of which is provided at least one layer pair comprising an electrically insulating layer (15) and another overlying electrically conducting layer (10) in the form of a conducting loop. The conducting loops are electro-conductively connected to one another through the electrically insulating layer. The inductive component is provided with connection elements (12, 14).

Description

Induktives Bauelement Inductive component
Stand der TechnikState of the art
Die Erfindung geht von einem induktiven Bauelement nach dem Oberbegriff des Hauptanspruchs aus. Induktive Bauelemente sind in Form von Spulen bekannt, bei denen ein elektrisch leitfähiger Draht in mehreren Windungen um einen rohrförmigen Körper gewickelt wird und schließlich die Enden des elektrisch leitfähigen Drahtes als Anschlußdrähte dienen und meist mit Kontaktelementen, welche am rohrförmigen Körper befestigt sind, verbunden sind. Die Herstellung solcher Spulen erfolgt üblicherweise mittels manueller Wicklung oder Wickelmaschinen.The invention is based on an inductive component according to the preamble of the main claim. Inductive components are known in the form of coils, in which an electrically conductive wire is wound in several turns around a tubular body and finally the ends of the electrically conductive wire serve as connecting wires and are usually connected to contact elements which are fastened to the tubular body. Such coils are usually produced by means of manual winding or winding machines.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße induktive Bauelement mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß das induktive Bauelement besonders preiswert und aufwandsarm herstellbar ist, da Drucktechniken oder Lithographietechniken für dieThe inductive component according to the invention with the characterizing features of the main claim has the advantage that the inductive component is particularly inexpensive and inexpensive to manufacture, since printing techniques or lithography techniques for
Herstellung einsetzbar sind. Außerdem ist dieses induktive Bauelement auch in sehr kleinen Abmessungen herstellbar, was bei den bekannten induktiven Bauelementen meist nur mit hohem Aufwand möglich ist. Des weiteren läßt sich das induktive Bauelement gemeinsam mit anderen Bauelementen gleichzeitig auf einer Leiterplatte herstellen, wodurch sich die Herstellungskosten erneut verringern. Zudem ist das induktive Bauelement besonders exakt herstellbar, da dessen Geometrie insbesondere durch hochpräzise Verfahren, wie z.B. die Photolithographie sehr genau einstellbar ist.Manufacturing can be used. It is also inductive Component can also be produced in very small dimensions, which is usually only possible with great effort in the known inductive components. Furthermore, the inductive component can be produced together with other components at the same time on a printed circuit board, as a result of which the production costs are reduced again. In addition, the inductive component can be produced particularly precisely, since its geometry can be set very precisely, in particular by high-precision methods such as photolithography.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen induktiven Bauelements möglich.Advantageous further developments and improvements of the inductive component specified in the main claim are possible through the measures listed in the subclaims.
Sind die Leiterschleifen annähernd kreisförmig ausgebildet, so ergibt dies den Vorteil, daß ein äußerst homogenes Magnetfeld mit dem induktiven Bauelement erzeugt werden kann und zudem die Berechnung dieses Magnetfeldes sehr einfach ist.If the conductor loops are approximately circular, this has the advantage that an extremely homogeneous magnetic field can be generated with the inductive component and that this magnetic field is also very simple to calculate.
Es erweist sich außerdem als Vorteil, wenn durch die Innenräume der Leiterschleifen ein Durchbruch verläuft, durch den ein Ferritkern steckbar ist, da dadurch das erfindungsgemäße induktive Bauelement auch als Spule mit Kern, insbesondere Transformatorkern, einsetzbar ist.It also proves to be an advantage if a breakthrough runs through the interior of the conductor loops through which a ferrite core can be inserted, since the inductive component according to the invention can also be used as a coil with a core, in particular a transformer core.
Das induktive Bauelement ist besonders platzsparend und einer gewickelten Spule ähnlich ausführbar, wenn je eines der Enden der Leiterschleifen in etwa über bzw. unter der zwischen den Leiterschleifen liegenden Öffnung angeordnet ist.The inductive component is particularly space-saving and similar to a wound coil if one of the ends of the conductor loops is arranged approximately above or below the opening between the conductor loops.
Die Strukturierung der elektrisch leitfähigen Schichten und/oder der wenigstens einen isolierenden Schicht mittels eines photolithographischen Verfahrens ist ein besonders preiswertes Herstellungsverfahren, da dieses Verfahren bereits für die Massenherstellung elektrischer Bauelemente eingesetzt wird und daher auch gut beherrscht wird.The structuring of the electrically conductive layers and / or the at least one insulating layer by means of a photolithographic process is a particularly inexpensive production process, since this process is already used for the mass production of electrical components and is therefore well controlled.
Ebenso vorteilhaft ist es, die Drucktechnik für die Herstellung der elektrisch leitfähigen Schichten und/oder der wenigstens einen isolierenden Schicht einzusetzen, da mit diesem Verfahren auch größere Schichtdicken besonders preiswert herstellbar sind.It is also advantageous to use the printing technology for the production of the electrically conductive layers and / or the at least one insulating layer, since even larger layer thicknesses can be produced particularly economically with this method.
Der Einsatz von Leitpaste und/oder Isolierpaste zur Herstellung des induktiven Bauelements bietet den Vorteil, daß bereits beim Aufbringen der Pasten die Form der Leiterschleifen bzw. der isolierenden Schicht festgelegt und kontrolliert werden kann. Zudem sind solche Pasten sehr preiswert.The use of conductive paste and / or insulating paste for the production of the inductive component offers the advantage that the shape of the conductor loops or the insulating layer can be determined and controlled as soon as the pastes are applied. Such pastes are also very inexpensive.
Verwendet man zur Verbindung von zwei Leiterschleifen durch die zwischen ihnen liegende Öffnung hindurch ein Verbindungsstück, welches die Öffnung in etwa ausfüllt, so verbessert dies wiederum die Berechenbarkeit des zu erzeugenden Magnetfelds und der Spulen, da dadurch eine exakt definierte Leitergeometrie entsteht.If a connector is used to connect two conductor loops through the opening between them, which approximately fills the opening, this in turn improves the predictability of the magnetic field to be generated and the coils, since this results in a precisely defined conductor geometry.
Die Herstellung des Verbindungsstücks aus einer Leitpaste oder durch ein photolithographisches Verfahren bringt wiederum die Vorteile der kostengünstigen Realisierbarkeit mit εich.The production of the connecting piece from a conductive paste or by means of a photolithographic process in turn brings with it the advantages of cost-effective implementation.
Sind die Innenräume der Leiterschleifen durch eine weitere isolierende Schicht ausgefüllt, so läßt sich das induktive Bauelement in Schichtbauweise übereinander herstellen, wobei jede Schicht eine besonders plane Geometrie aufweist. Dadurch vereinfacht sich zum einen der Herstellungsprozeß und erhöht sich zum anderen die Genauigkeit, mit der sich das induktive Bauelement bezogen auf einen gewünschten Induktivitätswert herstellen läßt. Sind die Leiterschleifen wenigstens teilweise als Spiralen ausgeführt, so läßt sich dadurch der Vorteil erzielen, daß weniger Schichten nötig sind, um eine vorgegebene Induktivität zu erhalten. Dadurch lassen εich sehr flache induktive Bauelemente herstellen.If the interiors of the conductor loops are filled with a further insulating layer, the inductive component can be produced in a layered manner, with each layer having a particularly flat geometry. On the one hand, this simplifies the manufacturing process and on the other hand increases the accuracy with which the inductive component can be produced in relation to a desired inductance value. If the conductor loops are at least partially designed as spirals, the advantage can be achieved that fewer layers are required to obtain a given inductance. This enables very flat inductive components to be produced.
Zeichnungdrawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are shown in the drawing and explained in more detail in the following description.
Es zeigen:Show it:
Figur 1 eine perspektivische Darstellung aller leitendenFigure 1 is a perspective view of all conductive
Elemente eines induktiven Bauelements,Elements of an inductive component,
Figur 2 eine Seitenansicht eines induktiven Bauelements,FIG. 2 shows a side view of an inductive component,
Figur 3 eine aufgeschnittene Seitenansicht eines induktivenFigure 3 is a cut side view of an inductive
Bauelements,Component,
Figur 4 eine perspektivische Darstellung eines induktivenFigure 4 is a perspective view of an inductive
Bauelements,Component,
Figur 5 eine Ausführungsform mit spiralförmigenFigure 5 shows an embodiment with spiral
Leiterschleifen.Conductor grinding.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In der in Figur 1 dargestellten perspektivischen Ansicht ist eine erste elektrisch leitfähige Schicht 11 vorgesehen, die in Form einer in etwa kreisförmigen, offenen Leiterschleife ausgebildet ist. An einem der beiden Enden weist die erste elektrisch leitfähige Schicht 11 ein Anschlußelement 12 in Form einer Anschlußleiterbahn auf. In mehreren Ebenen über der ersten elektrisch leitfähigen Schicht 11 sind mehrere weitere elektrisch leitfähige Schichten 10 vorgesehen, die alle ebenfalls in Form einer in etwa kreisförmigen, offenen Leiterschleife ausgebildet sind und alle in etwa den selben Radius aufweisen, wie die erste elektrisch leitfähige Schicht 11 und alle in etwa konzentrisch zur ersten elektrisch leitfähigen Schicht 11 angeordnet sind. Die weiteren elektrisch leitfähigen Schichten 10 sind dabei bezüglich der Stelle, an der die Leiterschleife geöffnet ist, jeweils um ein kleines Winkelstück gegeneinander verdreht angeordnet, und zwar dergestalt, daß jeweils eines der beiden Enden von je zwei übereinanderliegenden Leiterschleifen miteinander um ein geringes Stück überlappen. Zwischen den beiden sich überlappenden Enden jedes übereinanderliegenden Leiterschleifenpaares ist je ein Verbindungsstück 13 angeordnet. Dadurch entsteht eine in etwa spulenförmige Struktur. Die oberste weitere elektrisch leitfähige Schicht 10 weiεt an ihrem noch freien, offenen Ende ein weiteres Anschlußelement 14 in Form einer Anschlußleiterbahn auf.In the perspective view shown in FIG. 1, a first electrically conductive layer 11 is provided, which is designed in the form of an approximately circular, open conductor loop. At one of the two ends, the first electrically conductive layer 11 has a connection element 12 in the form of a connection conductor track. A plurality of further electrically conductive layers 10 are provided in several levels above the first electrically conductive layer 11, all of which are likewise in the form of an approximately circular, open one Conductor loop are formed and all have approximately the same radius as the first electrically conductive layer 11 and all are arranged approximately concentrically to the first electrically conductive layer 11. The further electrically conductive layers 10 are arranged with respect to the point at which the conductor loop is opened, in each case rotated relative to one another by a small angle piece, in such a way that one of the two ends of two conductor loops lying one above the other overlap by a small amount. A connecting piece 13 is arranged between the two overlapping ends of each pair of conductor loops lying one above the other. This creates an approximately coil-shaped structure. The uppermost further electrically conductive layer 10 has at its still free, open end a further connecting element 14 in the form of a connecting conductor track.
Das so beschriebene, elektrisch leitfähige Gebilde dient als Spule, da es elektrischen Strom in kreisförmigen Bahnen und in etwa wendeiförmig ansteigend zwischen den beiden Anschlußleiterbahnen 12, 14 leitet, so daß ein axial zur Mittelachse der Leiterschleifen verlaufendes Magnetfeld entsteht.The electrically conductive structure described in this way serves as a coil, since it conducts electrical current in circular paths and rising in an approximately helical manner between the two connecting conductor tracks 12, 14, so that a magnetic field extending axially to the central axis of the conductor loops is produced.
Das in Figur 1 dargestellte induktive Bauelement wird jedoch üblicherweise nicht als freischwebendes Gebilde hergestellt, sondern als Schichtenpaket, wobei zwischen den einzelnen elektrisch leitfähigen Schichten 10, 11 isolierende Schichten vorzusehen sind, um eine ordnungsgemäße Funktion des induktiven Bauelements zu gewährleisten. Eine solche Anordnung ist in Figur 2 dargestellt.However, the inductive component shown in FIG. 1 is usually not produced as a free-floating structure, but rather as a layer package, insulating layers being provided between the individual electrically conductive layers 10, 11 in order to ensure proper functioning of the inductive component. Such an arrangement is shown in Figure 2.
In Figur 2 ist auf einem Trägersubstrat 17 die erste elektrisch leitfähige Schicht 11 mit der Anschlußleiterbahn 12 angeordnet. Darüber folgen, der Anordnung in Figur 1 entsprechend, die weiteren elektrisch leitfähigen Schichten 10, wobei die Schichten 10, 11 jeweils untereinander mit den Verbindungsstücken 13 verbunden sind und die oberste weitere elektrisch leitfähige Schicht 10 die weitere Anschlußleiterbahn 14 aufweist. Zwischen je einem Paar aus übereinanderliegenden elektrisch leitfähigen Schichten 10, 11 ist eine elektrisch isolierende Schicht 15 angeordnet, die dort jeweils eine Öffnung 16 aufweist, wo das Verbindungsstück 13 die elektrisch isolierende Schicht 15 durchdringt. Während in der hier gezeigten Darstellung noch Luftεpalte zwischen den elektrisch isolierenden Schichten 15 und den elektrisch leitfähigen Schichten 10, ll dargestellt sind, ist es jedoch üblich, diese Anordnung als kompaktes Schichtenpaket ohne LuftZwischenräume herzustellen, wie es in Figur 3 dargestellt ist.In FIG. 2, the first electrically conductive layer 11 with the connecting conductor track 12 is arranged on a carrier substrate 17. Follow the arrangement in Figure 1 Correspondingly, the further electrically conductive layers 10, the layers 10, 11 each being connected to one another with the connecting pieces 13 and the uppermost further electrically conductive layer 10 having the further connecting conductor 14. Between each pair of superposed electrically conductive layers 10, 11 there is an electrically insulating layer 15, each of which has an opening 16 where the connecting piece 13 penetrates the electrically insulating layer 15. While air gaps between the electrically insulating layers 15 and the electrically conductive layers 10, 11 are still shown in the illustration shown here, it is common to produce this arrangement as a compact layer package without air gaps, as shown in FIG. 3.
Bei der Darstellung des induktiven Bauelements in Figur 3 wurde nacheinander jeweils eine der elektrisch leitfähigen Schichten 10, 11 und eine der elektrisch isolierenden Schichten 15 aufgebracht. Dabei wurde, um eine besonders plane Geometrie zu erhalten, jeweils der Innenraum jeder Leiterschleife mit einer weiteren isolierenden Schicht 18 ausgefüllt. Dies läßt sich am einfachsten dadurch erreichen, daß nach dem Aufbringen einer elektrisch leitfähigen Schicht 10, 11, eine Isolierpaste über der aufgebrachten elektrisch leitfähigen Schicht 10, 11 so verstrichen wird, daß sie gleichzeitig sämtliche Leerräume in der elektrisch leitfähigen Schicht 10, 11 ausfüllt und zusätzlich noch die nächst höher liegende elektrisch isolierende Schicht 15 bildet. Die Aussparung der Öffnung 16 läßt sich dann sowohl mittels Ätzen, als auch durch mechanisches Entfernen, wie Bohren oder Fräsen, aber auch durch Vorsehen einer Stempelform, die während des Einfüllvorganges der Isolierpaste an die Stelle der Öffnung 16 gesetzt wird und anschließend herausgezogen wird, realisieren. Zur Herstellung der elektrisch leitfähigen Schichten 10, ll aber ebenso der elektrisch isolierenden Schichten 15 sind außerdem photolithographische Verfahren, als auch Druckverfahren einsetzbar. Das Verbindungsstück 13 kann dabei hergestellt werden, indem zum Beispiel die Öffnungen 16 mit einer Leitpaste gefüllt werden, aber ebenso beispielsweise durch Löten oder ein photolithographisches Verfahren.In the illustration of the inductive component in FIG. 3, one of the electrically conductive layers 10, 11 and one of the electrically insulating layers 15 were applied in succession. In order to obtain a particularly flat geometry, the interior of each conductor loop was filled with a further insulating layer 18. The easiest way to achieve this is that after the application of an electrically conductive layer 10, 11, an insulating paste is spread over the applied electrically conductive layer 10, 11 so that it simultaneously fills all empty spaces in the electrically conductive layer 10, 11 and additionally forms the next higher lying electrically insulating layer 15. The recess in the opening 16 can then be realized both by etching and by mechanical removal, such as drilling or milling, but also by providing a stamp shape which is placed in the place of the opening 16 during the filling process of the insulating paste and is then pulled out . For the production of the electrically conductive layers 10, 11, however likewise the electrically insulating layers 15, photolithographic processes and printing processes can also be used. The connecting piece 13 can be produced, for example, by filling the openings 16 with a conductive paste, but also, for example, by soldering or a photolithographic process.
Die in Figur 4 dargestellte perspektiviεche Ansicht zeigt ein induktives Bauelement, analog zu Figur 3, bei dem zusätzlich durch die Innenräume der Leiterschleifen ein Durchbruch 19 angeordnet wurde. Dieεer Durchbruch ist durch Ätzen oder Bohren oder ein sonstiges Verfahren herstellbar und geeignet, für die Durchführung beispielsweise eines Ferritkerns für das induktive Bauelement zu dienen. Zum Anschluß weist das induktive Bauelement die beiden Anschlußleiterbahnen 14, 12 auf, die von den Leiterschleifen zum Rand des induktiven Bauelements geführt sind, wo sie mit Anschlußkontakten zur Zuführung von elektrischem Strom für das induktive Bauelement verbunden werden können, was in der Figur nicht dargestellt ist.The perspective view shown in FIG. 4 shows an inductive component, analogous to FIG. 3, in which an opening 19 was additionally arranged through the interior of the conductor loops. This breakthrough can be produced by etching or drilling or some other method and is suitable for the implementation of, for example, a ferrite core for the inductive component. For connection, the inductive component has the two connecting conductor tracks 14, 12, which are guided from the conductor loops to the edge of the inductive component, where they can be connected to connecting contacts for supplying electrical current for the inductive component, which is not shown in the figure .
Die Form der Leiterschleifen des induktiven Bauelements ist nicht auf die Kreisform beschränkt, sondern kann auch andere Geometrien, wie eine eckige Form oder eine ovale Form, aber auch beliebige andere offene Schleifenformen umfassen. Dieses Bauelement ist insbesondere als SMD (Surface Mounted Device) -Bauelement, vorzugsweise für die HF-Technik, einsetzbar.The shape of the conductor loops of the inductive component is not limited to the circular shape, but can also include other geometries, such as an angular shape or an oval shape, but also any other open loop shapes. This component can be used in particular as an SMD (Surface Mounted Device) component, preferably for HF technology.
Eine besonders flache Spulenanordnung ist in Figur 5 dargestellt. Dabei ist die erste elektrisch leitfähige Schicht 11 ebenso wie die weitere elektrisch leitfähige Schicht 10 in Form einer flachen Spirale ausgeführt, deren ineinanderliegende Windungen hier beispielhaft rechteckig geformt sind. Die elektrisch leitfähigen Schichten 10, li sind wiederum mittels eines Verbindungsstücks 13 und Anschlußleiterbahnen 12, 14 zu einem spulenförmigen Gebilde verbunden, das als induktives Bauelement dient. Auch hier wurde wie in Figur 1 der Deutlichkeit halber nur die Anordnung der leitenden Teile des induktiven Bauelements dargestellt. Zur realen Verwendung wird auch hier eine Einbettung dieser Struktur in nichtleitendes Material erfolgen, indem die leitenden Teile durch Drucken, Photolithographie, d.h. Maskieren, Ätzen, Entwickeln, Beschichten, oder sonstige Verfahren auf oder in plattenförmigen isolierenden Schichten erzeugt werden. Dabei sind als isolierende Schichten auch eine oder mehrere Leiterplatten einsetzbar. A particularly flat coil arrangement is shown in FIG. 5. Here, the first electrically conductive layer 11, like the further electrically conductive layer 10, is designed in the form of a flat spiral, the interlocking turns of which are exemplarily rectangular in shape here. The electrically conductive layers 10, left are in turn connected by means of a connecting piece 13 and connecting conductor tracks 12, 14 to form a coil-shaped structure which serves as an inductive component. Here too, as in FIG. 1, only the arrangement of the conductive parts of the inductive component was shown for the sake of clarity. For real use, this structure will also be embedded in non-conductive material by producing the conductive parts by printing, photolithography, ie masking, etching, developing, coating, or other processes on or in plate-shaped insulating layers. One or more circuit boards can also be used as insulating layers.

Claims

Ansprüche Expectations
1. Induktives Bauelement, dadurch gekennzeichnet, daß auf einem Trägersubstrat (17) eine in Form einer ersten offenen Leiterschleife ausgebildete, erste elektrisch leitfähige Schicht (11) vorgesehen ist, die ein erstes Anschlußelement (12) zum elektrischen Anschluß des induktiven Bauelements aufweist, daß über der erεten elektrisch leitfähigen Schicht (11) wenigstens ein Schichtenpaar aus einer mit wenigstens einer Öffnung (16) versehenen, elektrisch isolierenden Schicht (15) und einer darüber liegenden, in Form einer weiteren offenen Leiterschleife ausgebildeten, weiteren elektrisch leitfähigen Schicht (10) angeordnet ist, daß jeweils die durch die isolierende Schicht (15) voneinander getrennten elektrisch leitenden Schichten (10, 11) durch die Öffnung (16) hindurch miteinander elektrisch leitfähig verbunden εind und daß wenigstens eine der weiteren elektrisch leitfähigen Schichten (10) ein weiteres Anschlußelement (14) zum elektrischen Anschluß des induktiven Bauelements aufweist.1. Inductive component, characterized in that on a carrier substrate (17) in the form of a first open conductor loop, a first electrically conductive layer (11) is provided, which has a first connection element (12) for electrical connection of the inductive component that Arranged above the first electrically conductive layer (11) is at least one pair of layers comprising an electrically insulating layer (15) provided with at least one opening (16) and a further electrically conductive layer (10) lying above it in the form of a further open conductor loop is that in each case the electrically conductive layers (10, 11) separated from one another by the insulating layer (15) are electrically conductively connected to one another through the opening (16) and that at least one of the further electrically conductive layers (10) is a further connection element ( 14) for electrical connection of the inductive structure elements.
2. Induktives Bauelement nach Anspruch 1, dadurch gekennzeichnet, daß die Leiterschleifen annähernd kreisförmig ausgebildet sind.2. Inductive component according to claim 1, characterized in that the conductor loops are approximately circular.
3. Induktives Bauelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß durch die Innenräume der Leiterschleifen ein Durchbruch (19) , insbesondere eine Bohrung, vorzugsweise für einen Ferritkern verläuft. 3. Inductive component according to claim 1 or 2, characterized in that an opening (19), in particular a bore, preferably for a ferrite core, runs through the interior of the conductor loops.
4. Induktives Bauelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß je eines der Enden der Leiterschleifen in etwa über bzw. unter der zwischen den Leiterschleifen liegenden Öffnung (16) angeordnet ist.4. Inductive component according to one of claims 1 to 3, characterized in that one of the ends of the conductor loops is arranged approximately above or below the opening (16) lying between the conductor loops.
5. Induktives Bauelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Leiterschleifen und/oder die Öffnung (16) in der wenigstens einen isolierenden Schicht (15) durch Strukturierung der elektrisch leitfähigen Schichten (10, 11) und/oder der wenigstens einen isolierenden Schicht (15) mittels eines photolithographischen Verfahrens hergestellt sind.5. Inductive component according to one of claims 1 to 4, characterized in that the conductor loops and / or the opening (16) in the at least one insulating layer (15) by structuring the electrically conductive layers (10, 11) and / or at least one insulating layer (15) is produced by means of a photolithographic process.
6. Induktives Bauelement nach einem der Anεprüche 1 biε 5, dadurch gekennzeichnet, daß die elektriεch leitfähigen Schichten (10, 11) und/oder die wenigstens eine isolierende Schicht (15) übereinander gedruckt sind.6. Inductive component according to one of claims 1 to 5, characterized in that the electrically conductive layers (10, 11) and / or the at least one insulating layer (15) are printed one above the other.
7. Induktives Bauelement nach Anspruch 6, dadurch gekennzeichnet, daß die elektriεch leitfähigen Schichten7. Inductive component according to claim 6, characterized in that the electrically conductive layers
(10, 11) aus einer Leitpaste und/oder die isolierende Schicht (15) aus einer Isolierpaste hergestellt sind.(10, 11) are made from a conductive paste and / or the insulating layer (15) is made from an insulating paste.
8. Induktives Bauelement nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß für die Verbindung der Leiterεchleifen durch die zwiεchen ihnen liegende Öffnung (16) hindurch ein Verbindungεεtück (13) dient, daε die8. Inductive component according to one of claims 1 to 7, characterized in that for the connection of the conductor loops through the interposed opening (16) therethrough a connection piece (13) is used for the connection
Öffnung (16) in etwa auεfüllt.Opening (16) is approximately filled.
9. Induktives Bauelement nach Anspruch 8, dadurch gekennzeichnet, daß das Verbindungsεtück (13) auε einer Leitpaεte oder durch ein photolithograpiεches Verfahren hergestellt ist.9. Inductive component according to claim 8, characterized in that the connecting piece (13) is made from a guide pad or by a photolithographic process.
10. Induktives Bauelement nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß wenigstens die Innenräume der Leiterεchleifen durch eine weitere isolierende Schicht (18) auεgefüllt εind.10. Inductive component according to one of claims 1 to 9, characterized in that at least the interior of the Conductor loops are filled by a further insulating layer (18).
11. Induktiveε Bauelement nach einem der Anεprüche 1 biε 10, dadurch gekennzeichnet, daß wenigεtens eine der Leiterschleifen mehrere ineinanderligende Teilεchleifen nach Art einer Spirale aufweiεt. 11. Inductive component according to one of claims 1 to 10, characterized in that at least one of the conductor loops has a plurality of interlocking partial loops in the manner of a spiral.
PCT/DE1996/001014 1995-06-17 1996-06-11 Inductive component WO1997000526A1 (en)

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DE19522043.9 1995-06-17
DE19522043A DE19522043A1 (en) 1995-06-17 1995-06-17 Inductive component

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