Thin film coil and electronic device having the same

• US 10,483,767 B2
• Filed: 09/21/2015
• Issued: 11/19/2019
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: WITS Company Limited
• Inventors: Lim, Dae Ki, Kim, Tae Sung, Nam, Hyeon Gil, An, Chan Gwang, Lee, Hyun Seok, Chang, Ki Won, Han, Chang Mok, Bae, Sang Woo, Cho, Sung Eun, Sung, Jae Suk
• Primary Examiner(s): Nguyen, Tuyen T
• Application Number:
  US14/859,885
• Publication Number:
  US 20160013665A1
• Time in Patent Office: 1,520 Days
• Field of Search: 336 65, 336192, 336200, 336232
• CPC Class Codes: H01F 17/00 Fixed inductances of the signal type coils in general H01F5/00; inductors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof and multistep manufacturing processes therefor H01L28/10
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 2017/004 with the coil helically wound around an axis without a core
• CPC Class Codes: H01F 2017/0053 with means to reduce eddy currents
• CPC Class Codes: H01F 2017/0073 with a special conductive pattern, e.g. flat spiral
• CPC Class Codes: H01F 2017/0086 on semiconductor substrate inductors for integrated circuits H01L28/10
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

There are provided a thin film coil and an electronic device having the same, the thin film coil including a substrate; and a coil pattern including a first coil strand and a second coil strand formed on both surfaces of the substrate, respectively, wherein the first coil strand formed on one surface of the substrate includes at least one gyration path that passes through the other surface of the substrate and gyrates.

Claims

1. A thin film coil, comprising:

a substrate having a first surface and a second surface and formed of an insulating layer;

a first spiral pattern including a plurality of first coil strands formed spirally on the first surface of the substrate and having at least a portion electrically connected in parallel;

a second spiral pattern including a plurality of second coil strands formed spirally on the second surface of the substrate and having at least a portion electrically connected in parallel, and electrically connected to the first spiral pattern;

a first contact pad electrically connected to all ends disposed outwardly of the plurality of first coil strands;

a second contact pad electrically connected to all ends disposed inwardly of the plurality of first coil strands;

a lead out pattern formed on the first surface of the substrate, and leading out of the first spiral pattern from an end disposed on an inner side of the first spiral pattern; and

a plurality of gyration vias passing through the substrate in a position adjacent to the lead out pattern, and connecting the first spiral pattern and the second spiral pattern.

2. The thin film coil of claim 1, wherein the first spiral pattern is disconnected and is connected to the second spiral pattern through the plurality of gyration vias in the position adjacent to the lead out pattern.

3. The thin film coil of claim 2, wherein the first spiral pattern and the second spiral pattern are connected to each other in parallel.

4. The thin film coil of claim 1, wherein at least a portion of the lead out pattern has a shape in which a plurality of strands are connected in parallel.

5. The thin film coil of claim 1, further comprising a conductive connection via disposed on an end disposed on an inner side of the second spiral pattern,

wherein an end disposed on an inner side of the first spiral pattern and an end disposed on an inner side of the second spiral pattern are electrically connected by the conductive connection via.

6. The thin film coil of claim 1, wherein the first contact pad and the second contact pad are disposed outwardly of the first spiral pattern.

7. A wireless power receiving apparatus wirelessly receiving power transmitted by wireless power transmission apparatus to store the power in a battery, the wireless power receiving apparatus comprising:

a substrate having a first surface and a second surface and formed of an insulating layer;

a first spiral pattern including a plurality of first coil strands formed spirally on the first surface of the substrate and having at least a portion electrically connected in parallel;

a second spiral pattern including a plurality of second coil strands formed spirally on the second surface of the substrate and having at least a portion electrically connected in parallel, and electrically connected to the first spiral pattern;

a first contact pad electrically connected to all ends disposed outwardly of the plurality of first coil strands;

a second contact pad electrically connected to all ends disposed inwardly of the plurality of first coil strands;

a lead out pattern formed on the first surface of the substrate, and leading out of the first spiral pattern from an end disposed on an inner side of the first spiral pattern; and

a plurality of gyration vias passing through the substrate in a position adjacent to the lead out pattern, and connecting the first spiral pattern and the second spiral pattern.

8. The wireless power receiving apparatus of claim 7, wherein at least a portion of the lead out pattern has a shape in which a plurality of strands are connected in parallel.

9. An electronic device comprising:

a wireless power receiving apparatus;

a battery storing power received by the wireless power receiving apparatus; and

a case to accommodate the wireless power receiving apparatus and the battery therein,

wherein the wireless power receiving apparatus comprises;

a substrate having a first surface and a second surface and formed of an insulating layer;

a first spiral pattern including a plurality of first coil strands formed spirally on the first surface of the substrate and having at least a portion electrically connected in parallel;

a second spiral pattern including a plurality of second coil strands formed spirally on the second surface of the substrate and having at least a portion electrically connected in parallel, and electrically connected to the first spiral pattern;

a first contact pad electrically connected to all ends disposed outwardly of the plurality of first coil strands;

a second contact pad electrically connected to all ends disposed inwardly of the plurality of first coil strands;

a lead out pattern formed on the first surface of the substrate, and leading out of the first spiral pattern from an end disposed on an inner side of the first spiral pattern; and

a plurality of gyration vias passing through the substrate in a position adjacent to the lead out pattern, and connecting the first spiral pattern and the second spiral pattern.

10. The electronic device of claim 9, wherein at least a portion of the lead out pattern has a shape in which a plurality of strands are connected in parallel.

11. A case assembly of a portable device wirelessly receiving power, the case assembly comprising:

a thin film coil; and

a case of the portable device disposed on the other side of the thin film coil,

wherein the thin film coil comprises;

a substrate having a first surface and a second surface and formed of an insulating layer;

a first spiral pattern including a plurality of first coil strands formed spirally on the first surface of the substrate and having at least a portion electrically connected in parallel;

a second spiral pattern including a plurality of second coil strands formed spirally on the second surface of the substrate and having at least a portion electrically connected in parallel, and electrically connected to the first spiral pattern;

a first contact pad electrically connected to all ends disposed outwardly of the plurality of first coil strands; and

a second contact pad electrically connected to all ends disposed inwardly of the plurality of first coil strands,

a lead out pattern formed on the first surface of the substrate, and leading out of the first spiral pattern from an end disposed on an inner side of the first spiral pattern; and

a plurality of gyration vias passing through the substrate in a position adjacent to the lead out pattern, and connecting the first spiral pattern and the second spiral pattern.

12. The case assembly of claim 11, wherein at least a portion of the lead out pattern has a shape in which a plurality of strands are connected in parallel.