Substrate inductive devices and methods

• US 8,234,778 B2
• Filed: 07/18/2011
• Issued: 08/07/2012
• Est. Priority Date: 07/17/2008
• Status: Active Grant

• Current Assignee: Cantor Fitzgerald Securities (Cantor Fitzgerald, L.P.)
• Original Assignee: Pulse Electronics Incorporated (Yageo Corporation)
• Inventors: Schaffer, Christopher P., Lindner, Alan
• Primary Examiner(s): MAI, ANH T
• Application Number:
  US13/185,312
• Publication Number:
  US 20120011709A1
• Time in Patent Office: 386 Days
• Field of Search: 336/200, 336/223, 336/232, 296/021
• US Class Current: 29/602.1
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 17/062 Toroidal core with turns of coil around it
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• CPC Class Codes: H01F 41/046 structurally combined with ferromagnetic material
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

Methods and Apparatus for providing a low-cost and high-precision inductive device. In one embodiment, the inductive device comprises a plurality of vias having extended ends which replace windings disposed around a magnetically permeable core. In another embodiment, the inductive device comprises a wired center core as well as a plurality of vias having extended ends which act as windings disposed around a magnetically permeable core. In a second aspect of the invention, a method of manufacturing the aforementioned inductive devices as well as the wired core centers is disclosed.

Claims

1. A method of manufacturing an inductive device, said method comprising:

providing at least three substrates comprising a top substrate, a bottom substrate and one or more middle substrates, at least one of said at least three substrates comprised of an exterior surface which is at least partly copper plated, with said at least one substrate having one or more windings formed thereon;

disposing a plurality of conductors in the at least one of said three substrates, said conductors disposed so as to extend from said exterior copper plated surface and substantially through at least one or more said substrates;

disposing a magnetically permeable core at least partly between two or more of said at least three substrates;

disposing a second magnetically permeable core at least partly between two or more of said at least three substrates; and

disposing an incorporated electronic component onto at least one of said at least three substrates;

wherein said second magnetically permeable core in combination with said at least three substrates, said conductors, said incorporated electronic component, and said magnetically permeable core, form a complete filter circuit.

2. The method of claim 1, further comprising forming the one or more windings and said plurality of conductors in said at least one substrate such that said conductors are physically separated from said magnetically permeable core when said inductive device is assembled.

3. The method of claim 1, wherein said incorporated electronic component comprises a capacitive structure, said capacitive structure formed at least in part by disposing a plurality of capacitive surfaces on said at least one of said plurality of substrates, said plurality of capacitive surfaces being placed substantially parallel to one another.

4. A method of manufacturing an inductive device, said method comprising:

providing a pair of substrates, each comprised of an exterior surface which is at least partly plated, with copper or a copper alloy, each of said substrates having one or more windings formed thereon;

incorporating an electronic component onto at least one of said pair of substrates;

disposing a plurality of conductors, at least a portion of said plurality of conductors extending from said exterior plated surface and substantially through said substrate;

disposing one or more magnetically permeable core(s) at least partly between said pair of substrates; and

disposing a second magnetically permeable core, said second magnetically permeable core in combination with said substrates, said conductors, said incorporated electronic component, and other ones of said one or more magnetically permeable core(s), forming a complete filter circuit;

wherein said pair of substrates are spaced apart a first distance, said one or more windings in combination with said one or more magnetically permeable core(s) and said conductors forming said inductive device.

5. The method of claim 4, further comprising forming the one or more windings and said plurality of conductors such that said plurality of conductors are physically separated from said one or more magnetically permeable core(s).

6. The method of claim 4, further comprising applying an insulative coating to said one or more magnetically permeable cores to improve electrical isolation between the one or more cores and adjacent ones of said conductors.

7. The method of claim 4, further comprising forming at least one through-hole via in said pair of substrates.

8. The method of claim 4, wherein said incorporated electronic component is modeled into at least one of said pair of substrates.

9. The method of claim 4, wherein said incorporated electronic component comprises a discrete electronic component mounted on a discrete mounting location on at least one of said pair of substrates.

10. The method of claim 9, wherein said one or more magnetically permeable core(s) comprise non-toroidal magnetically permeable cores.

11. The method of claim 4, wherein said one or more magnetically permeable core(s) comprise non-toroidal magnetically permeable cores.

12. The method of claim 4, further comprising applying a vapor phase deposited insulative coating on at least a portion of said conductors to improve electrical isolation between the one or more cores and adjacent ones of said conductors.

13. A method of manufacturing a partially wired inductive device, said method comprising:

providing a plurality of substrates, each of said substrates having one or more conductive pathways disposed thereon;

molding a bundle of magnet wires to form a wired core center;

disposing said molded bundle of magnet wires at least partly between said plurality of printable substrates; and

disposing a magnetically permeable core at least partly between said plurality of printable substrates.

14. The method of claim 13, further comprising forming a plurality of outer winding vias onto each of said plurality of substrates.

15. The method of claim 14, further comprising disposing a plurality of extended conductors onto said substrates, at least a portion of said plurality of extended conductors interconnecting said plurality of substrates.

16. The method of claim 14, wherein said plurality of outer winding vias are formed such that said outer winding vias are in electrical communication with said wired core center via said one or more conductive pathways formed on said plurality of substrates.

17. A method of manufacturing an integrated inductive device electronics assembly, said method comprising:

obtaining a plurality of substrates, at least two of said substrates each comprised of an exterior surface which is at least partly plated with copper or a copper alloy, said at least two substrates having one or more windings formed thereon;

wherein an electronic component receiving pad is disposed on at least one of said plurality of substrates;

disposing an electronic component onto said electronic component receiving pad;

disposing a plurality of conductors, at least a portion of said plurality of conductors formed to extend from said exterior plated surface and substantially through said respective substrate; and

disposing a plurality of magnetically permeable cores at least partly between said at least two substrates;

wherein said at least two substrates are spaced apart a first distance, with said one or more windings, said plurality of magnetically permeable cores, said electronic component, and said conductors collectively comprising said integrated inductive device electronics assembly.

18. The method of claim 17, wherein said integrated inductive device electronics assembly comprises a modular jack.

19. The method of claim 18, wherein said integrated inductive device electronics assembly comprises a gigabit ethernet (GBE) electronic circuit.

20. The method of claim 19, further comprising forming through hole vias in said at least two substrates.

21. The method of claim 20, wherein at least a portion of said plurality of magnetically permeable cores comprise non-toroidal magnetically permeable cores.

22. The method of claim 21, further comprising applying a vapor phase deposited insulative coating to improve electrical isolation between the plurality of cores and adjacent ones of said conductors.