Thin film coil and electronic device having the same
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.
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.