THIN FILM COIL AND ELECTRONIC DEVICE HAVING THE SAME

• US 20130257362A1
• Filed: 06/26/2012
• Published: 10/03/2013
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: LIM, Dae Ki, AN, Chan Gwang, CHANG, Ki Won, HAN, Chang Mok, BAE, Sang Woo, CHO, Sung Eun, SUNG, Jae Suk, KIM, Tae Sung, NAM, Hyeon Gil, LEE, Hyun Seok
• Granted Patent: US 9,165,708 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• 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; and

a coil pattern including a first coil strand and a second coil strand formed on both surfaces of the substrate, respectively,

the first coil strand formed on one surface of the substrate including at least one gyration path formed to gyrate while passing through the other surface of the substrate.

2. The thin film coil of claim 1, wherein the gyration path shares a portion of the second coil strand formed on the other surface of the substrate.

3. The thin film coil of claim 2, wherein the gyration path is formed as the first coil strand is connected to the second coil strand through a gyration via.

4. The thin film coil of claim 2, wherein the at least one gyration path comprises:

two gyration vias electrically connecting the first coil strand and the second coil strand; and

a shared section disposed between the two gyration vias of the second coil strand.

5. The thin film coil of claim 1, further comprising two contact pads disposed outwardly of the coil pattern and electrically connected to both ends of the coil pattern.

6. The thin film coil of claim 5, wherein one end of the first coil strand is electrically connected to the contact pad through a portion of one surface of the substrate corresponding to the gyration path.

7. The thin film coil of claim 1, wherein the first coil strand and the second coil strand are connected in parallel.

8. The thin film coil of claim 1, wherein the second coil strand includes a conductive connection via formed to be disposed at each of both ends thereof and is electrically connected to the first coil strand by the conductive connection via.

9. The thin film coil of claim 1, wherein the first coil strand and the second coil strand are disposed on portions of both surfaces of the substrate to which they correspond in a vertical direction.

10. A thin film coil comprising:

a substrate;

a coil pattern including a first coil strand and a second coil strand formed on both surfaces of the substrate, respectively; and

two contact pads disposed outwardly of the coil pattern and electrically connected to both ends thereof,

the first coil strand formed on one surface of the substrate including;

a spiral pattern; and

a lead out pattern disposed to traverse the spiral pattern from one end disposed at an inner side of the spiral pattern so as to be electrically connected to the contact pad.

11. The thin film coil of claim 10, wherein a portion of the spiral pattern of the first coil strand in which the lead out pattern is disposed passes through the other surface of the substrate, and the spiral pattern gyrates based on the lead out pattern.

12. The thin film coil of claim 11, wherein the gyrating portion of the first coil shares a portion of the second coil strand formed on the other surface of the substrate.

13. An electronic device comprising:

a contactless power transmission apparatus having a thin film coil including a first coil strand and a second coil strand formed on both surfaces of a substrate and connected in parallel, respectively, the first coil strand formed on one surface of the substrate including at least one gyration path formed to gyrate while passing through the other surface of the substrate; and

a case accommodating the contactless power transmission apparatus therein.

14. The electronic device of claim 13, wherein the contactless power transmission apparatus is directly attached to an inner surface of the case or disposed to be closer to the inner surface of the case.

15. The electronic device of claim 13, further comprising:

a battery storing power generated from the contactless power transmission apparatus.

16. The electronic device of claim 13, further comprising a voltage conversion unit converting alternating current (AC) power supplied from the outside into an AC voltage having a particular frequency and providing the converted AC voltage to the contactless power transmission apparatus.