Inductor with resistive termination

• US 20040145441A1
• Filed: 01/28/2003
• Published: 07/29/2004
• Est. Priority Date: 01/28/2003
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Arnett, David W.
• Application Number:
  US10/352,710
• Publication Number:
  US 20040145441A1
• Time in Patent Office: Days
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• CPC Class Codes: H01F 41/041 Printed circuit coils apparatus or processes for manufacturing printed circuits in general H05K3/00
• CPC Class Codes: H01F 41/10 Connecting leads to windings making electric connections in general H01R43/00
• CPC Class Codes: H05K 1/0233 Filters, inductors or a magnetic substance
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 2201/1003 Non-printed inductor
• CPC Class Codes: H05K 2201/10636 Leadless chip, e.g. chip capacitor or resistor
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An inductor with resistive termination, according to one embodiment of the invention, is disclosed that includes an insulating matrix and one or more conductive elements situated within the insulating matrix. The conductive elements provide inductance and include at least one resistive conductive element having a resistance sufficient to provide the resistive termination.

Claims

1. A component with resistive termination comprising:

an insulating matrix including a ferrite material; and

,

at least one conductive element situated within the insulating matrix, the at least one conductive element including a resistive conductive element having a resistance sufficient to provide the resistive termination.

2. The component of claim 1, wherein the ferrite material has a characteristic such that an impedance resulting from the ferrite material is primarily resistive over a frequency range.

3. The component of claim 1, wherein the ferrite material has a characteristic such that an impedance resulting from the ferrite material is primarily inductive over a frequency range.

4. An inductor with resistive termination comprising:

an insulating matrix; and

,

one or more conductive elements situated within the insulating matrix, the one or more conductive elements providing inductance and including at least one resistive conductive element having a resistance sufficient to provide the resistive termination.

5. The inductor of claim 4, wherein the insulating matrix comprises an insulating ceramic matrix.

6. The inductor of claim 5, wherein the insulating ceramic matrix comprises a ferrite matrix.

7. The inductor of claim 4, wherein the one or more conductive elements further include one or more low-resistance conductive elements, the resistance of the at least one resistive conductive element sufficient to provide the resistive termination greater than a resistance of the one or more low-resistance conductive elements.

8. The inductor of claim 4, wherein the one or more conductive elements comprise a plurality of horseshoe-shaped elements.

9. An inductor with resistive termination comprising:

an insulating matrix; and

,

one or more elements situated within the insulating matrix to provide both high-frequency current blocking and low-frequency impedance matching functionality.

10. The inductor of claim 9, wherein the insulating matrix comprises an insulating ceramic matrix.

11. The inductor of claim 10, wherein the insulating ceramic matrix comprises a ferrite matrix.

12. The inductor of claim 9, wherein the one or more elements comprise a plurality of conductive elements, including a conductive element having a resistance sufficient to provide resistive termination.

13. The inductor of claim 9, wherein the one or more elements comprise one or more low-resistance conductive elements to provide the high-frequency current blocking functionality, and at least one conductive element having a resistance greater than that of the one or more low-resistance conductive elements to provide at least the low-frequency impedance matching functionality.

14. The inductor of claim 9, wherein the one or more elements comprise a plurality of horseshoe-shaped elements.

15. An inductor with resistive termination comprising:

an insulating matrix; and

,

means for providing inductance and resistance termination, situated within the insulating matrix.

16. The inductor of claim 15, wherein the insulating matrix comprises an insulating ceramic matrix.

17. The inductor of claim 16, wherein the insulating ceramic matrix comprises a ferrite matrix.

18. The inductor of claim 15, wherein the means comprises one or more conductive elements, including at least one conductive element having a resistance sufficient to provide the resistance termination.

19. An inductor comprising:

an insulating matrix; and

,

means for high-frequency current blocking and low-frequency impedance matching, situated within the insulating matrix.

20. The inductor of claim 19, wherein the means comprises one or more conductive elements, including at least one conductive element having a resistance sufficient to provide impedance matching at low frequencies.

21. The inductor of claim 19, wherein the insulating matrix comprises an insulating ceramic matrix.

22. The inductor of claim 21, wherein the insulating ceramic matrix comprises a ferrite matrix.

23. A circuit board comprising:

a substrate;

a conductive trace on the substrate; and

,

an inductor with resistive termination interrupting the conductive trace.

24. The circuit board of claim 23, further comprising an electrical component positioned at an end of the conductive trace.

25. The circuit board of claim 23, further comprising a predetermined location interrupting the conductive trace, originally intended for a resistive termination-only device, on which the inductor with the resistive termination is located.

26. The circuit board of claim 23, wherein the inductor with the resistive termination comprises:

an insulating matrix; and

,

a plurality of conductive elements within the insulating matrix and including at least one conductive element having a resistance sufficient to provide the resistive termination.

27. The circuit board of claim 26, wherein the insulating matrix includes a ferrite matrix.

28. The circuit board of claim 26, wherein the plurality of conductive elements includes a plurality of horseshoe-shaped elements.

29. An electronic device comprising:

a circuit board;

a conductive trace on the circuit board; and

,

an inductor with resistive termination interrupting the conductive trace.

30. The electronic device of claim 29, further comprising an electrical component positioned at an end of the conductive trace.

31. The electronic device of claim 29, further comprising a predetermined location interrupting the conductive trace originally intended for a resistive termination-only device on which the inductor with resistive termination is located.

32. The electronic device of claim 29, wherein the inductor with resistive termination comprises:

an insulating matrix; and

,

a plurality of conductive elements within the insulating matrix and including at least one conductive element having a resistance sufficient to provide the resistive termination.

33. A method for manufacturing an inductor with resistive termination comprising:

repeating

applying an insulating matrix layer;

applying a resistive conductive element;

interconnecting the resistive conductive element to the immediate prior conductive element as applicable,

until a desired resistance of the inductor is achieved;

where a desired inductance of the inductor remains unachieved,

repeating

applying a second insulating matrix layer;

applying a low-resistance conductive element; and

,

interconnecting the low-resistance conductive element to the immediate prior conductive element,

until the desired inductance of the inductor is achieved.

34. The method of claim 33, further initially comprising applying one or more initial insulating matrix layers.

35. The method of claim 33, further initially comprising performing one or more times:

applying an initial insulating matrix layer;

applying a low-resistance conductive element; and

,

interconnecting the low-resistance conductive element to the immediate prior conductive element as applicable.

36. The method of claim 33, further comprising, prior to applying the resistive conductive element, applying a second low-resistance conductive element.

37. The method of claim 33, further comprising, after applying the resistive conductive element, applying a second low-resistance conductive element.

38. The method of claim 33, further comprising, once the desired inductance of the inductor has been achieved, applying one or more final insulating matrix layers.

39. The method of claim 33, wherein applying the insulating matrix layer and applying the second insulating matrix layer each comprises applying an insulating ceramic matrix layer.

40. The method of claim 39, wherein applying the insulating ceramic matrix layer comprises applying an insulating ceramic ferrite matrix layer.

41. A method comprising:

providing a substrate;

providing a conductive trace on the substrate; and

,

providing an inductor with resistive termination on the conductive trace, the inductor interrupting the conductive trace.

42. The method of claim 41, wherein providing the substrate comprises providing a circuit board.

43. The method of claim 41, wherein providing the inductor with resistive termination comprises providing an inductor having an insulating matrix within which a plurality of conductive elements are situated, at least one of the plurality of conductive elements having a resistance sufficient to provide the resistive termination of the inductor.