Array type inductor

Patent metadata

Field	Value
Publication number	US-10403707-B2
Application number	US-201715476823-A
Country	US
Kind code	B2
Filing date	Mar 31, 2017
Priority date	Mar 31, 2017
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

Examples of this disclosure include a low profile inductor for use in any application with a multi-layer inductor pattern that allows control of optimum H values. Some examples of such an inductive device comprises a plurality of patterned metal coils arranged in a vertical stack, a plurality of conductive vias configured to couple each of the plurality of patterned metal coils together, and a magnetic material disposed between the plurality of patterned metal coils and within each of the plurality of patterned metal coils.

First claim

What is claimed is:

1. An inductive device comprising:
a plurality of patterned metal coils arranged in a vertical stack and embedded in a substrate or a printed circuit board to form a plurality of layers, wherein each of the plurality of patterned metal coils comprises a U shaped central portion and a plurality of side portions each configured to form a spiral;
a plurality of conductive vias configured to couple each of the plurality of patterned metal coils together;
a magnetic material disposed between the plurality of patterned metal coils and within each of the plurality of patterned metal coils;
a pad layer proximate to a bottom layer of the plurality of patterned metal coils and coupled to the bottom layer of the plurality of patterned metal coils; and
a plurality of solder balls, each of the plurality of solder balls coupled to the pad layer opposite the bottom layer of the plurality of patterned metal coils.

2. The inductive device of claim 1 , wherein the magnetic material comprises a homogenous structure between the plurality of layers.

3. The inductive device of claim 1 , wherein each of the plurality of patterned metal coils has a first pattern configured to allow for lamination and filling without drilling.

4. The inductive device of claim 3 , wherein the first pattern is filled with the magnetic material.

5. The inductive device of claim 1 , wherein the plurality of solder balls are configured in a ball grid array or a land grid array.

6. The inductive device of claim 1 , wherein the plurality of side portions extend on each side of the central portion in parallel.

7. The inductive device of claim 6 , wherein the central portion is U shaped and each of the plurality of side portions is coupled to the central portion.

8. The inductive device of claim 1 , wherein the inductive device is incorporated into a device selected from a group consisting of a music player, a video player, an entertainment unit, a navigation device, a communications device, a mobile device, a mobile phone, a smartphone, a personal digital assistant, a fixed location terminal, a tablet computer, a computer, a wearable device, a laptop computer, a server, and a device in an automotive vehicle, and further including the device.

9. An inductive device comprising:
means for conducting current, the means for conducting current arranged in a vertical stack and embedded in a substrate or a printed circuit board to form a plurality of layers, wherein the means for conducting current comprises a U shaped central portion and a plurality of side portions each configured to form a spiral;
means for coupling configured to couple the means for conducting current together;
means for enhancing a magnetic field disposed in the means for conducting current;
a pad layer proximate to a bottom layer of the means for conducting current and coupled to the bottom layer of the means for conducting current; and
a plurality of solder balls, each of the plurality of solder balls coupled to the pad layer opposite the bottom layer of the means for conducting current.

10. The inductive device of claim 9 , wherein the means for enhancing the magnetic field comprises a homogenous structure in the means for conducting current.

11. The inductive device of claim 9 , wherein the means for conducting current has a first pattern configured to allow for lamination and filling without drilling.

12. The inductive device of claim 11 , wherein the first pattern is filled with the means for enhancing the magnetic field.

13. The inductive device of claim 9 , wherein the plurality of solder balls are configured in a ball grid array or a land grid array.

14. The inductive device of claim 9 , wherein the plurality of side portions extend on each side of the central portion in parallel.

15. The inductive device of claim 14 , wherein the plurality of side portions is coupled to the central portion.

16. The inductive device of claim 9 , wherein the inductive device is incorporated into a device selected from a group consisting of a music player, a video player, an entertainment unit, a navigation device, a communications device, a mobile device, a mobile phone, a smartphone, a personal digital assistant, a fixed location terminal, a tablet computer, a computer, a wearable device, a laptop computer, a server, and a device in an automotive vehicle, and further including the device.

17. An integrated circuit package comprising:
an integrated circuit attached to a top layer of a substrate;
a plurality of patterned metal coils arranged in a vertical stack and embedded in the substrate to form a plurality of layers, wherein each of the plurality of patterned metal coils comprises a U shaped central portion and a plurality of side portions each configured to form a spiral;
a plurality of conductive vias configured to couple each of the plurality of patterned metal coils together;
a magnetic material disposed between the plurality of patterned metal coils and within each of the plurality of patterned metal coils;
a pad layer proximate to a bottom layer of the plurality of patterned metal coils and coupled to the bottom layer of the plurality of patterned metal coils; and
a plurality of solder balls, each of the plurality of solder balls coupled to the pad layer opposite the bottom layer of the plurality of patterned metal coils.

18. The integrated circuit package of claim 17 , wherein the magnetic material comprises a homogenous structure between the plurality of layers.

19. The integrated circuit package of claim 17 , wherein each of the plurality of patterned metal coils has a first pattern configured to allow for lamination and filling without drilling.

20. The integrated circuit package of claim 19 , wherein the first pattern is filled with the magnetic material.

21. The integrated circuit package of claim 17 , wherein the plurality of solder balls are configured in a ball grid array or a land grid array.

22. The integrated circuit package of claim 17 , wherein the plurality of side portions extend on each side of the central portion in parallel.

23. The integrated circuit package of claim 22 , wherein each of the plurality of side portions is coupled to the central portion.

24. The integrated circuit package of claim 17 , wherein the integrated circuit package is incorporated into a device selected from a group consisting of a music player, a video player, an entertainment unit, a navigation device, a communications device, a mobile device, a mobile phone, a smartphone, a personal digital assistant, a fixed location terminal, a tablet computer, a computer, a wearable device, a laptop computer, a server, and a device in an automotive vehicle, and further including the device.

Assignees

• Qualcomm Inc

Inventors

• We Hong Bok
• Kim Chin-Kwan
• Park Joonsuk

Classifications

• H01F27/292

  Surface mounted devices · CPC title

• H01F17/04

  with magnetic core · CPC title

• H01F17/0013

  with stacked layers · CPC title

• H01F2017/048

  with encapsulating core, e.g. made of resin and magnetic powder · CPC title

• H01L28/10 Primary

  Electricity · mapped topic