EP0658907A1 - Verfahren zur Herstellung elektrischer Komponenten - Google Patents

Verfahren zur Herstellung elektrischer Komponenten Download PDF

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Publication number
EP0658907A1
EP0658907A1 EP94308506A EP94308506A EP0658907A1 EP 0658907 A1 EP0658907 A1 EP 0658907A1 EP 94308506 A EP94308506 A EP 94308506A EP 94308506 A EP94308506 A EP 94308506A EP 0658907 A1 EP0658907 A1 EP 0658907A1
Authority
EP
European Patent Office
Prior art keywords
former
groove
layer
conductive layer
helical
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.)
Withdrawn
Application number
EP94308506A
Other languages
English (en)
French (fr)
Inventor
Howard Bottomley
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.)
Antenna Products Ltd
Original Assignee
Antenna Products Ltd
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
Priority claimed from GB939325603A external-priority patent/GB9325603D0/en
Application filed by Antenna Products Ltd filed Critical Antenna Products Ltd
Publication of EP0658907A1 publication Critical patent/EP0658907A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/041—Printed circuit coils
    • H01F41/045—Trimming
    • 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
    • H01F2017/004—Printed inductances with the coil helically wound around an axis without a core

Definitions

  • This invention relates to a method of manufacturing electrical components, especially antenna components and inductors, and to electrical components manufactured by said method.
  • a method of manufacturing an electrical component comprises the steps of producing a former of electrically insulating material which has a pattern of one or more grooves in its surface, depositing a layer of electrically conductive material over the surface of the former, including at least the bottom of the or each groove, and removing the conductive layer from the surface of the former excepting the groove or grooves.
  • the surface of the former may be the exterior surface of a solid former, or either the external or the interior surface of a hollow former, such as a tubular former.
  • a method of manufacturing an antenna or inductive component comprises the steps of producing a former of electrically insulating material which has a helical or pseudo-helical groove in its surface, and providing a layer of electrically conductive material in the groove but not the remainder of the surface of the former.
  • the entire surface of the former is provided with a covering layer of conductive material, and the conductive layer is removed except at the helical or pseudo-helical groove.
  • the present invention thus enables components to be repeatedly produced which are mechanically stable and have precisely controlled parameters and values.
  • inductances and antenna components are helically wound, for example on a cylindrical former
  • present invention makes it readily possible if desired to produce such components with a non-circular cross-section, such as polygonal cross-section.
  • the conductive layer in the case of radio frequency components, it is possible for the conductive layer to be relatively thin because, as radio frequencies travel on the surface of conductors, thin components are in use able to perform equally as well as thicker and more solid components.
  • the former used in the present invention may be produced in any one of a number of different ways, eg machining, but injection moulding of plastics material is especially suitable.
  • the former may be a hollow such as tubular body, with the conductive layer on its interior surface.
  • conductive layer various methods can be employed to deposit the conductive layer, but electroplating may be preferred. Plating techniques for plastics and other non-metallic materials are well known. Other possible methods of producing the conductive layer are:-
  • the entire surface of the former including the walls as well as the bottom of the grooves, will have an applied conductive layer. It may thus be desired for the grooves moulded or otherwise produced in the surface of the former to be of V-shaped cross-section, but a rectangular U-shaped cross-section is preferred.
  • the former is moulded of plastics material with a helical (or pseudo-helical) V- or U-groove in its surface, which may be the exterior or interior surface in the case of a tubular or hollow former.
  • helical or pseudo-helical
  • U-groove in its surface, which may be the exterior or interior surface in the case of a tubular or hollow former.
  • the term "pseudo-helical” is used because it is not essential for the former to be of circular cross-section.
  • the deposited conductive layer on the main surface of the former can be removed in a variety of ways, more particularly mechanical methods such as machining or abrading.
  • a cylindrical former 10 is injection moulded of an insulating plastics material.
  • the former is moulded with a groove 12 extending helically along its length.
  • a layer 14 of a suitable metal - such as copper - is plated over the entire surface of the former, including the groove 12, as indicated at 16.
  • the conductive layer 14 is removed from the main portion of the surface of the former, as indicated at 18.
  • the conductive layer 14, 16 then remains only in the V-groove and constitutes a helical inductance or antenna element of electrically conducting material.
  • FIG. 3 is shown a tubular former 10A having a rectangular U-shaped groove 12A extending helically along the length of its interior surface.
  • a layer of conductive material 14A is applied over the entire surface, as by plating for example, and this layer is then removed from the helical peak between the groove, ie, where indicated at 18A.
  • a plastics moulded former 20 is shown which could be employed in the manufacture of an electrical filter component.
  • This example is given only by way of explanation, as in practice the illustrated former would be more readily and cheaply produced by machining than by moulding.
  • the figure is illustrative of the fact that complex formers can readily be plastics moulded, to constitute the basis of various electrical components carrying a plated electrical element or an array of plated electrical elements.
  • Figure 5 shows the finished filter component in the instance of this simple example, wherein after metal plating the conductive deposition has been removed from the main surface 22 of the former, leaving the conductive elements 24 in the rectangularly cross-sectioned grooves 26.
  • electrically conducting paths of complex shape can be produced by moulding a former of the appropriate shape with the necessary grooves, depositing a metal layer on the former and then removing the metal layer except in the grooves.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Aerials (AREA)
  • Coils Or Transformers For Communication (AREA)
EP94308506A 1993-12-14 1994-11-17 Verfahren zur Herstellung elektrischer Komponenten Withdrawn EP0658907A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB939325603A GB9325603D0 (en) 1993-12-14 1993-12-14 Methods of manufacture of electrical components
GB9325603 1993-12-14
GB9415686A GB9415686D0 (en) 1993-12-14 1994-08-03 Methods of manufacture of electrical components
GB9415686 1994-08-03

Publications (1)

Publication Number Publication Date
EP0658907A1 true EP0658907A1 (de) 1995-06-21

Family

ID=26304026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94308506A Withdrawn EP0658907A1 (de) 1993-12-14 1994-11-17 Verfahren zur Herstellung elektrischer Komponenten

Country Status (1)

Country Link
EP (1) EP0658907A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997004496A1 (en) * 1995-07-14 1997-02-06 Allgon Ab A combination of at least one helically wound coil and a carrier therefor for use in a helical antenna, and a method for the manufacture of such combination
EP1122810A2 (de) * 2000-01-31 2001-08-08 Mitsubishi Materials Corporation Antenne und Anordnung von Antennen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2123437A7 (de) * 1971-01-28 1972-09-08 Fiat Spa
JPS60208820A (ja) * 1984-04-02 1985-10-21 Matsushita Electric Ind Co Ltd チツプインダクタの製造方法
JPS62247514A (ja) * 1985-08-26 1987-10-28 Ueda Nippon Musen Kk コイルの製作方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2123437A7 (de) * 1971-01-28 1972-09-08 Fiat Spa
JPS60208820A (ja) * 1984-04-02 1985-10-21 Matsushita Electric Ind Co Ltd チツプインダクタの製造方法
JPS62247514A (ja) * 1985-08-26 1987-10-28 Ueda Nippon Musen Kk コイルの製作方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 58 (E - 386) 7 March 1986 (1986-03-07) *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 118 (E - 600) 13 April 1988 (1988-04-13) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997004496A1 (en) * 1995-07-14 1997-02-06 Allgon Ab A combination of at least one helically wound coil and a carrier therefor for use in a helical antenna, and a method for the manufacture of such combination
EP1122810A2 (de) * 2000-01-31 2001-08-08 Mitsubishi Materials Corporation Antenne und Anordnung von Antennen
EP1122810A3 (de) * 2000-01-31 2004-04-21 Mitsubishi Materials Corporation Antenne und Anordnung von Antennen

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