Method and apparatus for forming a magnetic component on a printed circuit board

• US 6,489,876 B1
• Filed: 09/22/2000
• Issued: 12/03/2002
• Est. Priority Date: 09/22/2000
• Status: Expired due to Term

• Current Assignee: DET International Holding Limited (Delta Electronics Incorporated)
• Original Assignee: Ascom Energy Systems AG (Delta Electronics Incorporated)
• Inventors: Jitaru, Ionel
• Primary Examiner(s): MAI, ANH T
• Application Number:
  US09/668,620
• Time in Patent Office: 802 Days
• Field of Search: 296/021, 296/06, 336/200, 336/223, 336/232
• US Class Current: 336/200
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2866 Combination of wires and sheets
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor
• CPC Class Codes: Y10T 29/49071 by winding or coiling

Abstract

A method and apparatus for forming a magnetic component on a printed circuit board. The printed circuit board has at least one inner layer including a trace that forms a winding of the magnetic component. Another winding of the magnetic component is formed by a length of wire that is disposed externally to the printed circuit board.

Claims

1. A method for forming a magnetic component on a printed circuit board, comprising mounting a magnetic component on the printed circuit board, providing the circuit board with a conductive trace so that a first winding of the magnetic component includes said conductive trace, and disposing a first wire on an external surface of the printed circuit board so that a second winding of the magnetic component includes said wire.

2. The method of claim 1, wherein said wire is provided with insulation.

3. The method of claim 1, further comprising providing an inner layer of the printed circuit board and forming said trace on said inner layer.

4. The method of claim 1, further comprising tacking said first wire to said external surface with an adhesive.

5. The method of claim 1, further comprising providing a second wire so that a third winding of the magnetic component includes said second wire, and disposing said second wire on a second, opposite external surface of the printed circuit board.

6. The method of claim 1, further comprising interconnecting an electrical component to the magnetic component by soldering a lead of the electrical component directly to an end of said first wire.

7. An apparatus for forming a magnetic component, comprising a printed circuit board, a magnetic element, and a first wire, wherein said printed circuit board includes a conductive trace, wherein a first winding of said magnetic component includes said trace, wherein a second winding of said magnetic component includes said wire, and wherein said wire is disposed on an external surface of said printed circuit board.

8. The apparatus of claim 7, wherein said printed circuit board has an inner layer, and wherein said trace is formed on said inner layer.

9. The apparatus of claim 7, wherein said wire is attached to said exterior surface with an adhesive.

10. The apparatus of claim 7, wherein said wire is attached to said exterior surface with a fastening means.

11. The apparatus of claim 7, wherein said wire is held against said exterior surface of said printed circuit board.

12. The apparatus of claim 7, further comprising a second wire disposed on an opposite external surface of said printed circuit board, a third winding of said magnetic component including said second wire.

13. The apparatus of claim 7, further comprising an electrical shield element disposed over said wire.

14. The apparatus of claim 7, wherein said magnetic component includes a ferrite core, and wherein said printed circuit board includes cut-out areas to permit at least a portion of said ferrite core to extend through said printed circuit board.