Spiral Inductor Device

• US 20110156854A1
• Filed: 03/09/2011
• Published: 06/30/2011
• Est. Priority Date: 10/12/2007
• Status: Active Grant

• Current Assignee: VIA Technologies Incorporated (VIA Technologies)
• Original Assignee: VIA Technologies Incorporated (VIA Technologies)
• Inventors: Lee, Sheng-Yuan
• Granted Patent: US 8,253,523 B2
• 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 2017/0073 with a special conductive pattern, e.g. flat spiral
• CPC Class Codes: H01F 2017/008 Electric or magnetic shielding of printed inductances

Abstract

A spiral inductor device is provided. The spiral inductor device includes a first spiral conductive trace with multiple turns and a second spiral conductive trace with multiple turns adjacent thereto, disposed on an insulating layer over a substrate, wherein the outermost turn and the innermost turn of the first spiral conductive trace have a first end and a second end, respectively, the outermost turn and the innermost turn of the second spiral conductive trace have a third end and a fourth end, respectively, and the second and fourth ends are connected to ground. A non-continuous spiral conductive trace with a single turn is disposed on the insulating layer, parallel and adjacent to the outermost turn of the first spiral conductive trace, wherein the non-continuous spiral conductive trace is connected to the ground and at least a portion thereof is disposed between the first and the second spiral conductive traces.

Claims

1. A spiral inductor device, comprising:

an insulating layer disposed on a substrate;

a first spiral conductive trace with multiple turns disposed on the insulating layer, wherein the outermost turn and the innermost turn of the first spiral conductive trace have a first end and a second end, respectively, and the second end is connected to ground;

a second spiral conductive trace with multiple turns disposed on the insulating layer and adjacent to the first spiral conductive trace, wherein the outermost turn and the innermost turn of the second spiral conductive trace have a third end and a fourth end, respectively, and the fourth end is connected to ground; and

a first non-continuous spiral conductive trace with a single turn disposed on the insulating layer, parallel and adjacent to the outermost turn of the first spiral conductive trace, wherein the first non-continuous spiral conductive trace is connected to the ground and at least a portion of the first non-continuous spiral conductive trace is disposed between the first spiral conductive trace and the second spiral conductive trace.

2. The spiral inductor device as claimed in claim 1, wherein the first non-continuous spiral conductive trace comprises at least a first conductive segment and a second conductive segment, and wherein the first conductive segment and second conductive segment are arranged on both sides of a straight line passing through a central area surrounded by the first spiral conductive trace, respectively.

3. The spiral inductor device as claimed in claim 1, further comprising a stack of non-continuous spiral conductive traces correspondingly under the first non-continuous spiral conductive trace, wherein the stack of non-continuous spiral conductive traces is electrically connected to the first non-continuous spiral conductive trace by a plurality of vias.

4. The spiral inductor device as claimed in claim 3, wherein the first non-continuous spiral conductive trace is electrically connected to a guard ring.

5. The spiral inductor device as claimed in claim 1, wherein the first non-continuous spiral conductive trace, the first spiral conductive trace, and the second spiral conductive trace are located on the same level with respect to the substrate.

6. The spiral inductor device as claimed in claim 1, further comprising a second non-continuous spiral conductive trace with a single turn disposed on the insulating layer, parallel and adjacent to the innermost turn of the first spiral conductive trace, wherein the second non-continuous spiral conductive trace is connected to the ground.

7. The spiral inductor device as claimed in claim 6, wherein the second non-continuous spiral conductive trace comprises at least a first conductive segment and a second conductive segment, and wherein the first conductive segment and second conductive segment are arranged on both sides of a straight line passing through a central area surrounded by the first spiral conductive trace, respectively.

8. The spiral inductor device as claimed in claim 6, further comprising a stack of non-continuous spiral conductive traces correspondingly under the second non-continuous spiral conductive trace, wherein the stack of non-continuous spiral conductive traces is electrically connected to the second non-continuous spiral conductive trace by a plurality of vias.

9. The spiral inductor device as claimed in claim 8, wherein the second non-continuous spiral conductive trace is electrically connected to a guard ring.

10. The spiral inductor device as claimed in claim 6, wherein the second non-continuous spiral conductive trace, the first non-continuous spiral conductive trace, the first spiral conductive trace, and the second spiral conductive trace are located on the same level with respect to the substrate.

11. The spiral inductor device as claimed in claim 1, further comprising a second non-continuous spiral conductive trace with a single turn disposed on the insulating layer, wherein the outermost turn of the second spiral conductive trace is parallel and adjacent to the second non-continuous spiral conductive trace.

12. The spiral inductor device as claimed in claim 11, wherein the second non-continuous spiral conductive trace comprises at least a first conductive segment and a second conductive segment, and wherein the first conductive segment and second conductive segment are arranged on both sides of a straight line passing through a central area surrounded by the second spiral conductive trace, respectively.

13. The spiral inductor device as claimed in claim 11, further comprising a stack of non-continuous spiral conductive traces correspondingly under the second non-continuous spiral conductive trace, wherein the stack of non-continuous spiral conductive traces is electrically connected to the second non-continuous spiral conductive trace by a plurality of vias.

14. The spiral inductor device as claimed in claim 13, wherein the second non-continuous spiral conductive trace is electrically connected to a guard ring.

15. The spiral inductor device as claimed in claim 11, wherein the second non-continuous spiral conductive trace, the first non-continuous spiral conductive trace, the first spiral conductive trace, and the second spiral conductive trace are located on the same level with respect to the substrate.

16. The spiral inductor device as claimed in claim 11, further comprising a third non-continuous spiral conductive trace with a single turn disposed on the insulating layer, parallel and adjacent to the innermost turn of the second spiral conductive trace, wherein the third non-continuous spiral conductive trace is connected to the ground.

17. The spiral inductor device as claimed in claim 16, wherein the third non-continuous spiral conductive trace comprises at least a first conductive segment and a second conductive segment, and wherein the first conductive segment and second conductive segment are arranged on both sides of a straight line passing through a central area surrounded by the second spiral conductive trace, respectively.

18. The spiral inductor device as claimed in claim 16, further comprising a stack of non-continuous spiral conductive traces correspondingly under the third non-continuous spiral conductive trace, wherein the stack of non-continuous spiral conductive traces is electrically connected to the third non-continuous spiral conductive trace by a plurality of vias.

19. The spiral inductor device as claimed in claim 18, wherein the third non-continuous spiral conductive trace is electrically connected to a guard ring.

20. The spiral inductor device as claimed in claim 16, wherein the third non-continuous spiral conductive trace, the second non-continuous spiral conductive trace, the first non-continuous spiral conductive trace, the first spiral conductive trace, and the second spiral conductive trace are located on the same level with respect to the substrate.