Flat coil

• US 20040070482A1
• Filed: 07/22/2003
• Published: 04/15/2004
• Est. Priority Date: 01/22/2001
• Status: Abandoned Application

• Current Assignee: Flatcoil Solutions Limited
• Original Assignee: Flatcoil Solutions Limited
• Inventors: Golan, Gady
• Application Number:
  US10/466,932
• Publication Number:
  US 20040070482A1
• Time in Patent Office: Days
• US Class Current: 336/223
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 41/046 structurally combined with ferromagnetic material

Abstract

A flat coil assembly (10) comprising at least one electrically conductive layer (12) arranged in a substantially uniplanar spiral arrangement of loops with a void in a center of the spiral, and a core (14) made from mu-metal, wherein the core extending on one side of the uniplanar spiral arrangement over at least a first portion of the loops from an external loop to an internal loop, crossing over, through the void in the center and extending over at least a second portion of the loops on the other side of the uniplanar spiral arrangement.

Claims

1. A flat coil assembly comprising at least one electrically conductive layer arranged in a substantially uniplanar spiral arrangement of loops with a void in a center of the spiral, and a core made from mu-metal.

2. A flat coil assembly comprising at least one electrically conductive layer arranged in a substantially uniplanar spiral arrangement of loops with a void in a center of the spiral, and a core layer made from mu-metal extending on one side of the uniplanar spiral arrangement over at least a first portion of the loops from an external loop to an internal loop, crossing over, through the void in the center and extending over at least a second portion of the loops on the other side of the uniplanar spiral arrangement.

3. The flat coil assembly of claim 2, wherein the first and second portions substantially overlap.

4. The flat coil assembly of claim 2, wherein the first and second portions substantially do not overlap.

5. The flat coil assembly of claim 2 wherein there are a first and second electrically conductive layers arranged each in a substantially uniplanar spiral arrangement of loops and electrically connected at internal ends of the spirals, and having a void in a center of each of the spirals, and a core layer made from mu-metal extending on one side of the first uniplanar spiral arrangement over at least a first portion of the loops from an external loop to an internal loop, crossing over, through the voids in the center and extending over at least a second portion of the loops on the other side of the second uniplanar spiral arrangement.

6. The flat coil assembly of claim 5, wherein the electrically conductive layers are counteroriented.

7. The Flat coil assembly of claim 5, wherein each electrically conductive layer is placed on either side of a dielectric layer.

8. The flat coil assembly of claim 2, wherein the core layer and the electrically conductive layer are about 100 microns in thickness each.

9. The flat coil assembly of claim 2, wherein the electrically conductive layer is made form copper.

10. The flat coil assembly of claim 2, printed on a printed circuit board (PCB).

11. The flat coil assembly of claim 2, wherein the layers are manufactured using thick film technology, such as electroplating, metal-organic chemical vapor deposition (CVD).

12. The flat coil assembly of claim 2, wherein the layers are manufactured using thin film technology such as magnetron sputtering.

13. The flat coil assembly of claim 2, wherein the layers are manufactured using cut foils of mu-metal.

14. The flat coil assembly of claim 2, wherein the loops are rectangularly shaped.

15. The flat coil assembly of claim 2, wherein the loops are flatly shaped.

16. A flat coil assembly substantially as described in the above specification and accompanying figures.