ON CHIP INDUCTOR

• US 20120244802A1
• Filed: 03/24/2011
• Published: 09/27/2012
• Est. Priority Date: 03/24/2011
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Feng, Lei, Peperovits, Yaron
• Application Number:
  US13/070,645
• Publication Number:
  US 20120244802A1
• Time in Patent Office: Days
• US Class Current: 455/41.1
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 2017/0073 with a special conductive pattern, e.g. flat spiral
• CPC Class Codes: H01F 27/346 Preventing or reducing leakage fields using magnetic shields H01F27/36; using auxiliary windings H01F27/38
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

An apparatus may comprise a pair of inductors in an integrated circuit. Other embodiments are described and claimed.

Claims

1. An apparatus, comprising:

a first inductor arranged to occupy a first area of a substrate, the first inductor comprising a loop shape arranged to produce a first magnetic field; and

a second inductor disposed at least partially within the first area and comprises a crossing shape that includes a multiplicity of loops, wherein the multiplicity of loops are arranged to produce a second and a third magnetic field that cancel magnetic coupling between the first and second inductor.

2. The apparatus of claim 1, wherein the second inductor comprises an 8-shaped figure.

3. The apparatus of claim 2, wherein a first and a second loop portion of the 8-shaped figure are equal to one another.

4. The apparatus of claim 2, wherein the first loop portion of the 8-shaped figure differs from the second loop portion in at least one of:

shape and size, wherein the first inductor and second inductor are partially magnetically coupled.

5. The apparatus of claim 1, wherein the first inductor comprises multiple concentric windings.

6. The apparatus of claim 5, wherein the multiple concentric windings are each arranged to conduct current received at an input of the first inductor in one of:

a counterclockwise direction and a clockwise direction.

7. The apparatus of claim 1, wherein the second inductor comprises a multiplicity of 8-shaped loops, each 8-shaped loop having an upper and a lower loop, the upper loop being arranged to conduct current received from an input of the second inductor in one of a counterclockwise direction and a clockwise direction, and the lower loop being arranged to conduct current received from the input of the second inductor in the other of the clockwise and the counterclockwise direction.

8. The apparatus of claim 1, wherein the first inductor and second inductor group are disposed in a same level of the substrate.

9. The apparatus of claim 1, wherein the first inductor is disposed in a different level from that of the second inductor.

10. The apparatus of claim 9, wherein the first and second inductors are formed by a different metallurgical process.

11. The apparatus of claim 2, wherein a first and a second loop portion of the 8-shaped figure are arranged such that an overall electric coupling between the first and second inductors is zero.

12. The apparatus of claim 1, wherein the substrate comprises an integrated circuit.

13. A communications system, comprising:

a wireless transceiver disposed in an integrated circuit chip having a multiplicity of inductors, the multiplicity of inductors comprising one or more inductor pairs that comprise;

a first inductor that occupies a first area of the integrated circuit chip and is arranged to produce a first magnetic field; and

a second inductor that lies at least partially within the first area and comprises an 8-shape curve pattern that is arranged to produce opposing magnetic fields that at least partially cancel magnetic coupling between the first and second inductor.

14. The communications system of claim 13, wherein the first inductor comprises multiple concentric loops that are electrically connected in series to one another.

15. The communications system of claim 13, wherein the second inductor comprises a multiplicity of 8-shaped loops.

16. The communications system of claim 13, wherein the system comprises one or more of:

a wireless access point, a wireless client device, a wireless station, a laptop computer, ultra-laptop computer, portable computer (PC), personal computer, notebook PC, handheld computer, personal digital assistant (PDA), cellular telephone, combination cellular telephone/PDA, smartphone, pager, messaging device, media player, digital music player, set-top box, appliance, workstation, user terminal, mobile unit, consumer electronics, television, digital television, high-definition television, television receiver, and a high-definition television receiver.

17. The communications system of claim 17, wherein the first inductor is disposed in a first level and second inductor is disposed in a second level, and wherein the first and second inductors overlap one another.

18. A method of fabricating inductors in a substrate, comprising:

arranging a first inductor in a first level of the substrate, the first inductor occupying a first area and operable to provide a first magnetic field when current passes therethrough; and

arranging a second inductor over at least a portion of the first area of the substrate, the second inductor comprising an 8-figure shape having a first loop and a second loop mutually arranged to produce opposing magnetic fields that are operable to cancel magnetic coupling to the first magnetic field when a second current passes through the second inductor.

19. The method of claim 18, comprising arranging the second inductor in a second level of the substrate, wherein the first and the second inductor at least partially overlap one another.

20. The method of claim 18, wherein the first inductor comprises concentric multiple windings, and wherein the second inductor comprises multiple 8-shaped figures.