High coupling factor transformer and manufacturing method thereof

• US 7,656,264 B2
• Filed: 10/19/2006
• Issued: 02/02/2010
• Est. Priority Date: 10/19/2006
• Status: Active Grant

• Current Assignee: United Microelectronics Corporation
• Original Assignee: United Microelectronics Corporation
• Inventors: Liao, Tsuoe-Hsiang, Ou, Jun-Hong, Hsu, Tsun-Lai
• Primary Examiner(s): Enad; Elvin G
• Assistant Examiner(s): BAISA, JOSELITO SASIS
• Application Number:
  US11/550,808
• Publication Number:
  US 20080094166A1
• Time in Patent Office: 1,202 Days
• Field of Search: 336/223
• US Class Current: 336/223
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 41/041 Printed circuit coils apparatus or processes for manufacturing printed circuits in general H05K3/00

Abstract

A high coupling factor transformer and a manufacturing method thereof are provided. The transformer includes a primary winding and a secondary winding. The secondary winding is adjacent to the primary winding. The secondary winding and the primary winding induct with each other. The primary winding includes a plurality of first protruding portions, and the secondary winding includes a plurality of second protruding portions. The first protruding portions stretch to the secondary winding without electro-contact, and the second protruding portions stretch to the primary winding without electro-contact.

Claims

1. A transformer, comprising:

a primary winding, comprising a plurality of first protruding portions; and

a secondary winding, comprising a plurality of second protruding portions, the secondary winding being adjacent to the primary winding, and the secondary winding and the primary winding inducting with each other;

wherein the first protruding portions extend to the secondary winding without electrically contacting the secondary winding, and the second protruding portions extend to the primary winding without electrically contacting the primary winding;

wherein the first protruding portions are arranged on the primary winding in a single row, and the second protruding portions are arranged on the secondary winding in a single row, wherein the first protruding portions and the second protruding portions are interdigitated with one another.

2. The transformer as claimed in claim 1, wherein the first protruding portions and the second protruding portions have cuboidal shape.

3. The transformer as claimed in claim 1, wherein the first protruding portions and the second protruding portions have cylindrical shape.

4. The transformer as claimed in claim 1, wherein the primary winding is substantially disposed on a first plane, and the secondary winding is substantially disposed on a second plane, wherein the first plane is parallel to the second plane.

5. A transformer, comprising:

a primary winding, comprising a plurality of first protruding portions and a plurality of first openwork slots; and

a secondary winding, comprising a plurality of second protruding portions and a plurality of second openwork slots, the secondary winding being adjacent to the primary winding, and the secondary winding and the primary winding inducting with each other;

wherein the first protruding portions extend into the second openwork slots of the secondary winding, and the first protruding portions do not electrically contact the secondary winding;

the second protruding portions extend into the first openwork slots of the primary winding, and the second protruding portions do not electrically contact the primary winding.

6. The transformer as claimed in claim 5, wherein the first protruding portions and the second protruding portions have cuboidal shape.

7. The transformer as claimed in claim 5, wherein the first protruding portions and the second protruding portions have cylindrical shape.

8. The transformer as claimed in claim 5, wherein the first protruding portions are arranged on the primary winding in a single row.

9. The transformer as claimed in claim 8, wherein the second protruding portions are arranged on the secondary winding in a single row.

10. The transformer as claimed in claim 9, wherein the first protruding portions and the second protruding portions are interdigitated with one another.

11. The transformer as claimed in claim 5, wherein the first protruding portions are arranged on the primary winding in multiple rows.

12. The transformer as claimed in claim 11, wherein the second protruding portions are arranged on the secondary winding in multiple rows.

13. The transformer as claimed in claim 12, wherein the first protruding portions and the second protruding portions are interdigitated with one another.

14. The transformer as claimed in claim 5, wherein the primary winding is substantially disposed on a first plane, and the secondary winding is substantially disposed on a second plane, wherein the first plane is parallel to the second plane.

15. The transformer as claimed in claim 5, wherein each of the first protruding portions extends into one of the second openwork slots in one-to-one manner, and each of the second protruding portions extends into one of the first openwork slots in one-to-one manner.

16. A method of manufacturing the transformer, comprising:

forming a primary winding substantially on a first plane, wherein the primary winding comprises a plurality of first openwork slots;

forming a plurality of first protruding portions and a plurality of second protruding portions above the primary winding, wherein the first protruding portions are disposed on the primary winding, and first ends of the first protruding portions are electrically connected to the primary winding; and

first ends of the second protruding portions are disposed in the first openwork slots, and the second protruding portions are not electrically connected to the primary winding; and

forming a secondary winding substantially on a second plane, wherein the secondary winding comprises a plurality of second openwork slots;

the second openwork slots are disposed on second ends of the first protruding portions, and the first protruding portions are not electrically connected to the secondary winding; and

the second ends of the second protruding portions are electrically connected to the secondary winding.

17. The method of manufacturing the transformer as claimed in claim 16, wherein the first and second protruding portions have cuboidal shape.

18. The method of manufacturing the transformer as claimed in claim 16, wherein the first protruding portions and the second protruding portions have cylindrical shape.

19. The method of manufacturing the transformer as claimed in claim 16, wherein the first protruding portions are arranged on the primary winding in a single row.

20. The method of manufacturing the transformer as claimed in claim 19, wherein the second protruding portions are arranged on the secondary winding in a single row.

21. The method of manufacturing the transformer as claimed in claim 20, wherein the first protruding portions and the second protruding portions are interdigitated with one another.

22. The method of manufacturing the transformer as claimed in claim 16, wherein the first protruding portions are arranged on the primary winding in multiple rows.

23. The method of manufacturing the transformer as claimed in claim 22, wherein the second protruding portions are arranged on the secondary winding in multiple rows.

24. The method of manufacturing the transformer as claimed in claim 23, wherein the first protruding portions and the second protruding portions are interdigitated with one another.

25. The method of manufacturing the transformer as claimed in claim 16, wherein each of the first protruding portions extends from the primary winding into one of the second openwork slots in one-to-one manner, and each of the second protruding portions extends from the secondary winding into one of the first openwork slots in one-to-one manner.

26. A transformer, comprising:

a primary winding, comprising a plurality of protruding portions; and

a secondary winding, comprising a plurality of openwork slots, the secondary winding being adjacent to the primary winding, and the secondary winding and the primary winding inducting with each other;

wherein the protruding portions extend to the openwork slots of the secondary winding, and the primary winding does not electrically contact the secondary winding.

27. The transformer as claimed in claim 26, wherein the protruding portions have cuboidal shape.

28. The transformer as claimed in claim 26, wherein the protruding portions have cylindrical shape.

29. The transformer as claimed in claim 26, wherein the protruding portions are arranged on the primary winding in a single row.

30. The transformer as claimed in claim 26, wherein each of the protruding portions extends to one of the openwork slots in one-to-one manner.

31. The transformer as claimed in claim 26, wherein the protruding portions are arranged on the primary winding in a multi-row matter.

32. The transformer as claimed in claim 26, wherein the primary winding is substantially disposed on a first plane and a third plane, the secondary winding is substantially disposed on a second plane, wherein the second plane is located between the first plane and the third plane, and the three planes are parallel one another.

33. A method of manufacturing the transformer, comprising:

substantially forming a part of electrical path of a primary winding on a first plane;

forming a plurality of protruding portions on the electrical path of the first plane, wherein the protruding portions are electrically connected to the primary winding;

substantially forming a secondary winding on a second plane;

forming a plurality of openwork slots on the secondary winding, and the protruding portions penetrate the openwork slots, and the protruding portions are not electrically connected to the secondary winding; and

substantially forming another electrical path of the primary winding on a third plane, wherein the primary winding is formed by electrical connection of the protruding portions and the electrical paths of the first plane and the third plane;

wherein the second plane is located between the first plane and the third plane, and the three planes are parallel one another.

34. The method of manufacturing the transformer as claimed in claim 33, wherein the protruding portions have cuboidal shape.

35. The method of manufacturing the transformer as claimed in claim 33, wherein the protruding portions have cylindrical shape.

36. The method of manufacturing the transformer as claimed in claim 33, wherein the protruding portions are arranged on the primary winding in a single row.

37. The method of manufacturing the transformer as claimed in claim 33, wherein each of the protruding portions extends to one of the openwork slots in one-to-one manner.

38. The method of manufacturing the transformer as claimed in claim 33, wherein the protruding portions are arranged on the primary winding in a multi-row matter.

39. A transformer, comprising:

a primary winding, comprising a plurality of first protruding portions; and

a secondary winding, comprising a plurality of second protruding portions, the secondary winding being adjacent to the primary winding, and the secondary winding and the primary winding inducting with each other;

wherein the first protruding portions extend to the secondary winding without electrically contacting the secondary winding, and the second protruding portions extend to the primary winding without electrically contacting the primary winding;

wherein the first protruding portions are arranged on the primary winding in multiple row, and the second protruding portions are arranged on the secondary winding in multiple row, wherein the first protruding portions and the second protruding portions are interdigitated with one another.