WO1998024097A1 - Composant electrique - Google Patents

Composant electrique Download PDF

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Publication number
WO1998024097A1
WO1998024097A1 PCT/DE1997/002810 DE9702810W WO9824097A1 WO 1998024097 A1 WO1998024097 A1 WO 1998024097A1 DE 9702810 W DE9702810 W DE 9702810W WO 9824097 A1 WO9824097 A1 WO 9824097A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical component
contact
component according
guide means
contact 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.)
Ceased
Application number
PCT/DE1997/002810
Other languages
German (de)
English (en)
Inventor
Dietmar Dietz
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.)
CHIP CHOKE INDUCTIVITY COMPONENTS GmbH
Original Assignee
CHIP CHOKE INDUCTIVITY COMPONENTS 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 CHIP CHOKE INDUCTIVITY COMPONENTS GmbH filed Critical CHIP CHOKE INDUCTIVITY COMPONENTS GmbH
Priority to AU55487/98A priority Critical patent/AU5548798A/en
Publication of WO1998024097A1 publication Critical patent/WO1998024097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core

Definitions

  • the invention relates to an electrical component, in particular for mounting on a printed circuit board, according to the preamble of claim 1.
  • Inductive electrical components are often used as SMD components (Surface Mounted Devices).
  • contact elements which are used to form electrical connections, take up the ends of the coil winding of the inductive component. By placing the contact elements on the conductor tracks of the circuit board, the inductive component can then be integrated into an electrical circuit.
  • Such an electrical component is known for example from US-A-3, 585, 553.
  • the electrical component described in this document comprises a non-conductive base body with a wire winding, the ends of which are connected to contact surfaces of the base body. Guide grooves are provided on the contact surfaces, in which the ends of the wire winding are guided.
  • a ferrite core coil that can be used as an SMD component is known, the ferrite core of which carries projections on its circumference, which are preferably produced in one piece with the ferrite core and which serve to receive the wire ends of the coil winding.
  • the wire ends are wound around the projections of the ferrite core to form coil connections.
  • the coil connections can be provided with a solder paste and connected to a circuit board by heating the solder joint.
  • This known ferrite core coil has the disadvantage that the wire ends have to be wound several times around very small projections in order to form coil connections. This requires considerable effort in the manufacture of the coil connections and results in correspondingly high manufacturing costs and a long manufacturing time.
  • Annular electrical components with a wire winding are also known. These electrical components are used in housings provided with contact elements (pins) which are placed on the circuit board. The contact elements are connected to the ends of the wire winding. Contact is made with a circuit on the circuit board via the contact elements.
  • contact elements pins
  • the production of these elements is complex and costly intensive, since the ring-shaped component must first be wrapped with wire and then inserted into a housing and the wire ends in the housing must be connected to the contact elements (pins).
  • the invention has for its object to provide an electrical component of the type mentioned that is simple and inexpensive to manufacture with few parts and allows a secure connection of a wire winding with a contact element.
  • the electrical component has a closed, in particular annular, elliptical or square base body, on which a wound wire is arranged, which has at least one contact section.
  • This contact section is connected to at least one contact surface of a contact element arranged on the base body.
  • closed base body is understood to mean a body which is closed in itself and, in contrast to a body which is ⁇ tabför, has no defined beginning and no end.
  • the invention is characterized in that in the case of an electrical component with a closed base body, the contact element is formed directly on the component.
  • the arrangement of the contact element on the closed base body makes it possible to connect the component directly to a circuit by placing it on. It is no longer necessary - as was previously the case - into a contact element Housing are used.
  • the electrical component which only comprises a few parts, can be produced simply and inexpensively.
  • the contact element is preferably arranged on the side of the electrical component to be placed on the printed circuit board and protrudes from the latter in the direction of the printed circuit board.
  • the arrangement is particularly advantageous in the case of SMD components in which a plurality of contact elements are provided for connection to a printed circuit board.
  • the contact element and the electrical component are preferably formed in one piece. In this way, the arrangement can be manufactured in a manufacturing process, so that the manufacturing costs are reduced due to the reduced number of parts.
  • the contact surface of the contact element is produced by metallizing a surface of the contact element.
  • the contact surface can be produced simply and inexpensively by vapor deposition of metal.
  • the contact section of the wire is generally formed by a free wire end which is integrally connected to the contact surface of the contact element. It is advantageous if the wire end is integrated into the microstructure of the contact area in such a way that the wire end does not protrude from the contact area.
  • Guide means are preferably arranged on the contact element or in the vicinity thereof, which are used to fix the position of the wire section provided for contacting (eg a wire end) on the contact element. These guide means are not part of the device used to wind the wire. Rather, the guide means are directly assigned to the contact element itself.
  • the guide means take up a suitable part of the wound wire (contact section) and guide it to the location of the contact element intended for contacting.
  • the guide means can serve both to determine the position of the contact section of the wire in a direction parallel to the pitch axis of the winding and also transversely thereto (e.g. radially).
  • the determination of the position of the contact section transverse to the pitch axis of the winding usually serves to raise the contact section of the wire from the winding level to the (higher) contact level.
  • the positioning of the contact section parallel to the pitch axis serves to compensate for fluctuations in the wire feed during the winding process.
  • the guiding means can be formed by a guideway on or in which the wire is guided to the contact element in such a way that the wire section intended for contacting comes to rest on the contact surface.
  • a guideway on or in which the wire is guided to the contact element in such a way that the wire section intended for contacting comes to rest on the contact surface.
  • channel-like and tubular guide means are suitable as the guideway.
  • any contact surface on which the wire rests continuously and which leads to the contact surface is suitable as a guideway.
  • the guide means are preferably designed in such a way that their cross section provided for receiving the wire tapers towards the contact element.
  • the guide means are at least partially integrally formed on the contact element.
  • the guide means are formed by separate components that are independent of the contact element, but can be connected to the contact element.
  • the contact element in one piece with the electrical component.
  • the guide means which advantageously extend along the circumference of the base body of the electrical component.
  • the guide means are particularly advantageous in the case of inductive components which have a base body wrapped with wire (e.g. a ceramic, plastic or ferrite core).
  • the contact elements serve to receive the ends of the coil winding.
  • the guiding means ensure that the wire ends are reliably positioned on the contact surfaces of the contact elements provided for this purpose, despite the unavoidable tolerances when winding the base body.
  • the guide means can be implemented in all types of electrical components; it is independent of whether the base body of the component is ring-shaped, rod-shaped or in some other way.
  • the guide means provided are particularly suitable for wave and reflow soldering methods for reliably forming a soldering pad between the (solderable) contact elements and the conductor tracks of a printed circuit board.
  • a very important area of application for the claimed electrical component is miniaturized components, such as Suppression chokes for integrated circuits. With these components, due to their small size, precise winding is of particular importance.
  • the components often have two or more coil windings and often at least two contact elements, with each coil winding preferably being assigned two contact elements for receiving one wire end each.
  • suitable guide means With the aid of suitable guide means, it is even possible to arrange two or more coil windings on one and the same section of a component as a multiple winding (one above the other). The turns of the individual coil windings cross each other.
  • a suitable design of the guide means ensures that the ends of the individual coil windings are each placed on the desired contact elements. In particular, it is avoided that one wire end touches several contact elements, which can be arranged very close to one another.
  • the guide means are arranged symmetrically on the component in such a way that the component has the same symmetry as a similar component without guide means. This is the wrapping the component facilitates; because the higher the symmetry of the component, the easier it is to place it in a device provided for wrapping.
  • the electrical component is designed as an inductive component for electrical circuits.
  • Figure la - lc - a section of an electrical component provided with a coil winding with a closed base body in different views;
  • Figure 4 - a part of the toroidal core according to Figure 3 with a different design of the contact elements
  • FIG. 5 shows a part of the toroidal core according to FIG. 3 with a double winding on a ring section;
  • Figure 6 an oval-shaped toroid with two coil windings
  • Figure 7 a circular toroid with two coil windings.
  • FIG. 1 a shows a section of an inductive component 1 which consists of a closed coil core 11 provided with a wire winding 71.
  • the coil core 11 is annular. Alternatively, an elliptical or square coil core is also provided.
  • a wire end 76 of the coil winding 71 is applied to a contact surface 13 of a contact element 12, see also FIGS. 1b and 1c.
  • the coil core 11 has a guide track 16 which extends along the circumference of the coil core 11 to the contact surface 13.
  • the structure of the guideway 16 which is designed like a channel, is particularly clear from the cross-sectional representations according to FIGS. 1b and 1c.
  • the channel-like guideway 16 is delimited on its two longitudinal sides by side walls 18 which run at an angle to one another in such a way that the guideway 16 tapers towards the contact surface 13.
  • the bottom 17 of the guideway 16 is above it trough-shaped in such a way that the guide channel 16 has its greatest depth t along its central axis L.
  • the above-described design of the guideway 16 ensures that the wire end 76 is always securely received by the guideway 16 even when larger tolerances occur when winding the coil core 11; because the cross-section q of the guideway 16 is widened at its end facing away from the contact element 12 such that the wire end 76 inevitably gets into the guideway 16 during winding. Since the guideway 16 tapers towards the contact element 12 and at the same time has the greatest depth t in the region of its central axis L, the wire end 76 is automatically centered in the guideway 16 and thus reaches the contact surface 13 of the contact element 12. The wire end 76 can even be directed to a specific section of the contact surface 13.
  • the position of the wire end 76 along the slope axis s of the winding 71 is accordingly determined on the one hand, and the wire end 76 from the winding level (which is given by the surface of the coil core 11) to the contact level (contact surface 13) performed.
  • the wire end 76 stands out clearly from the contact surface 13 for the sake of clarity.
  • the associated increase in height in the area of the contact area 13 is disadvantageous, however, if the contact area 13 is to be placed on a conductor track of a printed circuit board. It is therefore for the Practical applications of the invention advantageous to incorporate the wire end 76 into the microstructure of the contact surface 13 and to integrate it into it (mechanically adhesive and electrically connected) in such a way that the flat shape of the contact surface 13 is retained even after the wire end 76 has been applied.
  • the contact element 12 itself is integrally formed on the coil core 11, which can be, for example, a ferrite core.
  • the contact surface 13 is formed by a metal layer which is applied to the surface of the contact element 12. As a (solderable) contact layer, this metal layer enables both the connection of the wire end 76 to the contact surface 13 and the subsequent connection of the contact surface 13 to a conductor track of a printed circuit board.
  • FIGS. 2a to 2c A variant of the component shown in FIG. 1 is shown in FIGS. 2a to 2c, which differs from the latter only with regard to the design of the guide means 16 '.
  • the guide means 16 ' are formed by a contact surface which extends with a convexly curved surface continuously from the winding level on the surface of the base body 11 (coil core) to the contact surface 13' of the contact element 12.
  • the contact section 76 of the wire 71 is reliably raised from the winding to the contact level of the component 1.
  • the guide means 16 'thus serve primarily to position the contact section 76 in the radial direction transverse to the pitch axis s.
  • Different inductive components are shown below with the aid of FIGS. 3 to 7, in which suitable guide means for the coil ends are arranged in the vicinity of their contact elements.
  • the basic structure of the guide means corresponds in each case to the example explained with reference to FIG. 1.
  • FIGS. 3a to 3c show an inductive component 2, the closed base body (which is rectangular in plan view) is provided with two opposite coil windings 71, 72.
  • the wire ends 76, 76 ', 77, 77' of the coil windings 71 and 72 are integrally integrated into the contact surfaces 23 of contact elements 22 which are arranged on both sides of the coil windings 71, 72.
  • the contact elements 22 are integrally formed on the base body 21.
  • the guideways 26 which are only indicated schematically, have a shape similar to that of the guideways 16 shown above with reference to FIGS. 1a to 1c. They are channel-like, the bottom region 27 of each guideway 26 being delimited by side walls 28. Since the guideways 26 taper towards their ends facing the contact surfaces 23, a precise guidance of the wire ends 76, 77 to a certain point on the respective contact surface 23 is ensured.
  • the base body 21 can in particular be a ferrite core.
  • Such ferrite cores are preferably used for inductive components which serve as interference suppression chokes for integrated circuits and which are placed with their contact surfaces 23 on the conductor tracks of a printed circuit board provided for this purpose.
  • the guide means 26 are arranged symmetrically on the base body 21. The consequence of this is that only two wire ends 76, 77 run in the guide channels 27 of the guide means 26, while the other two wire ends 76 ', 77' extend from the winding level 21 to the contact level 23 without guide means. As a rule, the first-mentioned wire ends 76, 77 are the ones whose contacting completes the winding process.
  • the symmetrical arrangement of the guide means 26 on the base body 21 has the advantage that the base body 21 can be positioned as desired for winding; there is no preferred direction specified by the guide means 26.
  • FIG. 4 shows a plan view of a part of an inductive component 3, the closed base body 31 of which is identical to the base body 21 shown above. The only difference from the previous exemplary embodiment is the design of the contact elements 32.
  • the contact elements 32 and the associated contact surfaces 33 are designed in such a way that the inductive component 3 can be connected to conductor tracks of a printed circuit board which run axially along the direction a as well as radially along the direction r.
  • Figure 5 shows a further modification of the embodiment of an inductive component shown in Figure 3.
  • two coil windings 71, 73 are arranged on one another on a section of the base body 41 of the component 4.
  • the individual windings of the windings 71, 73 intersect on the underside of the component 4, which is not visible in FIG. 4.
  • the coil winding 71 is the contact element 42 and the coil winding 73 is the contact element 42 'assigned.
  • Guideways 46 and 46 ' serve to reliably guide the wire ends 76 and 78 to the contact surfaces 43, 43' of the contact elements 42, 42 '.
  • the geometrical design of the guideways 46, 46 ' ensures in particular that the wire ends 76, 78 (with the contacting of which the winding process is completed) are only in contact with one contact surface 43 or 43'. Because of the guide means 46, 46 'provided in the vicinity of the contact elements 42, 42', it is therefore possible to arrange a plurality of coil windings 71, 73 even in the case of very small components in a very small space.
  • FIG. 6 shows a plan view of an inductive component 5 with an oval, closed toroidal core or base body 51, on the longitudinal sides of which two coil windings 71, 72 lying opposite one another are applied.
  • suitable guideways 56 which are formed on the base body 51, secure guidance of the winding ends 76 and 77 to the contact surfaces 53 of the respective contact elements 52 is ensured.
  • FIG. 7 shows an inductive component 6, the base body 61 of which is designed as a circular, closed toroidal core.
  • This toroidal core 61 is wound with two opposite coil windings 71, 72.
  • the contact surfaces 63 of contact elements 62 are used for contacting the wire ends 76, 76 ', 77, 77' of the coil windings 71, 72.
  • the structure of the guide means 66 is similar to the guide tracks 16 shown in FIG. 1 with a guide channel 17 and side walls 18.
  • the contact element is formed directly on the component. This arrangement of the contact element on the closed base body makes it possible to connect the component directly to a circuit by placing it on. It no longer has to be used in a housing provided with contact elements, as was previously the case.
  • the electrical component which only comprises a few parts, can be produced simply and inexpensively.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un composant électrique (6) comprenant un corps de base fermé, en particulier, annulaire, elliptique ou carré (61), destiné, notamment à être appliqué sur une plaquette de circuit imprimé. L'invention est caractérisée en ce qu'il est prévu sur le corps de base (61) un fil enroulé (71, 72) présentant au moins une section de contact (76, 76', 77, 77'), et en ce que ladite section de contact est connectée avec au moins une surface de contact (63) d'un élément de contact (62) disposé sur le corps de base (61).
PCT/DE1997/002810 1996-11-26 1997-11-26 Composant electrique Ceased WO1998024097A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU55487/98A AU5548798A (en) 1996-11-26 1997-11-26 Electrical component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996150996 DE19650996A1 (de) 1996-11-26 1996-11-26 Kontaktelement
DE19650996.3 1996-11-26

Publications (1)

Publication Number Publication Date
WO1998024097A1 true WO1998024097A1 (fr) 1998-06-04

Family

ID=7814051

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/002810 Ceased WO1998024097A1 (fr) 1996-11-26 1997-11-26 Composant electrique

Country Status (3)

Country Link
AU (1) AU5548798A (fr)
DE (1) DE19650996A1 (fr)
WO (1) WO1998024097A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025076B4 (de) * 2004-05-21 2006-04-20 Minebea Co., Ltd. Spulenanordnung und Verfahren zu deren Herstellung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585553A (en) * 1970-04-16 1971-06-15 Us Army Microminiature leadless inductance element
JPS5839007A (ja) * 1981-08-31 1983-03-07 Matsushita Electric Works Ltd コイル口出線支持装置とその製造方法
EP0206584A1 (fr) * 1985-06-07 1986-12-30 American Precision Industries Inc Dispositif électronique pouvant être installé sur une surface
DE3615037A1 (de) * 1986-05-03 1987-11-05 Johann Leonhard Huettlinger Anordnung bei der herstellung von spulenkoerpern fuer smd-spulen
EP0282646A1 (fr) * 1987-03-18 1988-09-21 Robert Bosch Gmbh Bobine à noyaux de ferrite à plus de deux contacts de bobine pour soudage Reflow sur une plaquette de circuit imprimé
JPH05283233A (ja) * 1992-04-03 1993-10-29 Mitsubishi Electric Corp チップ型インダクタ素子
JPH05299252A (ja) * 1992-04-22 1993-11-12 Tokin Corp 面実装形チョークコイル
JPH08186029A (ja) * 1995-01-06 1996-07-16 Murata Mfg Co Ltd インピーダンス変換トランス

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585553A (en) * 1970-04-16 1971-06-15 Us Army Microminiature leadless inductance element
JPS5839007A (ja) * 1981-08-31 1983-03-07 Matsushita Electric Works Ltd コイル口出線支持装置とその製造方法
EP0206584A1 (fr) * 1985-06-07 1986-12-30 American Precision Industries Inc Dispositif électronique pouvant être installé sur une surface
DE3615037A1 (de) * 1986-05-03 1987-11-05 Johann Leonhard Huettlinger Anordnung bei der herstellung von spulenkoerpern fuer smd-spulen
EP0282646A1 (fr) * 1987-03-18 1988-09-21 Robert Bosch Gmbh Bobine à noyaux de ferrite à plus de deux contacts de bobine pour soudage Reflow sur une plaquette de circuit imprimé
JPH05283233A (ja) * 1992-04-03 1993-10-29 Mitsubishi Electric Corp チップ型インダクタ素子
JPH05299252A (ja) * 1992-04-22 1993-11-12 Tokin Corp 面実装形チョークコイル
JPH08186029A (ja) * 1995-01-06 1996-07-16 Murata Mfg Co Ltd インピーダンス変換トランス

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 119 (E - 177) 24 May 1983 (1983-05-24) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 063 (E - 1500) 2 February 1994 (1994-02-02) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 091 (E - 1508) 15 February 1994 (1994-02-15) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 011 29 November 1996 (1996-11-29) *

Also Published As

Publication number Publication date
AU5548798A (en) 1998-06-22
DE19650996A1 (de) 1998-05-28

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