KR101546720B1 - Thin film coil, case assembly, non-contact power receiving device, and electronic device having the same - Google Patents

Abstract

The present invention relates to a thin film coil, a case assembly, and a wireless power receiving apparatus and an electronic apparatus having the same. A thin film coil according to an embodiment of the present invention includes: a substrate; A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; and a second coil strand formed on the other surface of the substrate, And a plurality of bypass vias passing through the substrate at a location adjacent the withdrawal pattern and connecting the first coil strand and the second coil strand, wherein the helical pattern is shorted at a location adjacent the withdrawal pattern A coil pattern that is coupled to the second coil strand via the bypass vias; A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; And a pad connecting via extending through the substrate from the first contact pad to the other surface of the substrate and electrically connected to the second coil strand, wherein the first coil strand and the second coil strand are electrically connected to each other, The two coil strands may be connected in parallel with one another.

Description

TECHNICAL FIELD [0001] The present invention relates to a thin film coil, a case assembly, and a wireless power receiving apparatus and an electronic apparatus having the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002]

The present invention relates to a thin film coil, a case assembly, and a wireless power receiving apparatus and an electronic apparatus having the same.

2. Description of the Related Art In recent years, a system for transmitting electric power wirelessly, that is, a non-contact type, has been studied in order to charge a secondary battery built in a portable terminal or the like.

Generally, a wireless power transmission apparatus includes a wireless power transmission apparatus that transmits power and a wireless power reception apparatus that receives and stores power.

Such a wireless power transmission apparatus transmits and receives electric power by using electromagnetic induction. To this end, a coil is provided inside each wireless power transmission apparatus.

The prior art wireless power transmission apparatus is configured such that such a coil is wound in parallel with the bottom surface (i.e., the outer contact surface). Further, the coil is configured to be fixed to the bottom surface by an adhesive, an adhesive sheet, or the like.

However, in the conventional case, since a coil of a general wire shape is used, the coils are wound in a laminated state when the coils are wound. Therefore, there is a problem that the thickness of the wireless power transmission apparatus becomes thick due to the thickness of the coil and the number of windings of the coil.

Therefore, in order to cope with the recent trend of favoring a thin device, it is necessary to develop a wireless power transmission device with a thinner thickness.

Also, in the conventional case, since a single-wire type coil is mainly used, there is a problem that the AC resistance value is increased due to the eddy current or skin effect at a low frequency and loss is generated.

Japanese Patent Application Laid-Open No. 2008-172872

An object of the present invention is to provide a thin film coil which is formed in a thin shape and an electronic apparatus having the same.

Another object of the present invention is to provide a wireless power transmission apparatus capable of minimizing the thickness by using a thin film coil.

Still another object of the present invention is to provide a wireless power transmission apparatus capable of minimizing loss caused by eddy currents, skin effect, etc. at a low frequency.

A thin film coil according to an embodiment of the present invention is a thin film coil provided in a wireless power transmission apparatus for wirelessly transmitting power or a wireless power reception apparatus for wirelessly receiving power transmitted from the wireless power transmission apparatus and storing the wireless power in a battery , Board; A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; and a second coil strand formed on the other surface of the substrate, And a plurality of bypass vias passing through the substrate at a location adjacent the withdrawal pattern and connecting the first coil strand and the second coil strand, wherein the helical pattern is shorted at a location adjacent the withdrawal pattern A coil pattern that is coupled to the second coil strand via the bypass vias; A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; And a pad connecting via extending through the substrate from the first contact pad to the other surface of the substrate and electrically connected to the second coil strand, wherein the first coil strand and the second coil strand are electrically connected to each other, The two coil strands may be connected in parallel with one another.

The wireless power receiving apparatus according to the present embodiment is a wireless power receiving apparatus that wirelessly receives power transmitted from a wireless power transmission apparatus and stores the received power wirelessly in a battery. The wireless power receiving apparatus includes a spiral pattern, A second coil strand formed on the other surface of the substrate; a second coil strand formed on the other surface of the substrate, the second coil strand passing through the substrate at a position adjacent to the withdrawal pattern, A plurality of bypass vias connecting one coil strand and the second coil strand, wherein the helical pattern is shorted at a location adjacent the withdrawal pattern and connected to the second coil strand through the bypass vias Coil pattern; A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; A pad connection via which extends vertically from the first contact pad to the other surface of the substrate through the substrate and is electrically connected to the second coil strand; And a magnetic portion located on one side of the substrate; And the first coil strand and the second coil strand may be connected in parallel with each other.

In addition, the electronic apparatus according to the present embodiment may include a wireless power receiving apparatus that wirelessly receives power and stores the received power in a battery; And a case accommodating the wireless power receiving device inside the wireless power receiving device, wherein the wireless power receiving device is formed on one side of the substrate and includes a spiral pattern and a first end disposed inside the spiral pattern, A second coil strand formed on the other surface of the substrate, and a second coil strand passing through the substrate at a position adjacent to the withdrawal pattern and connecting the first coil strand and the second coil strand Wherein the helical pattern is shorted at a location adjacent the withdrawal pattern and connected to the second coil strand via the bypass via; A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; A pad connection via which extends vertically from the first contact pad to the other surface of the substrate through the substrate and is electrically connected to the second coil strand; And a magnetic portion located at one side of the substrate, wherein the first coil strand and the second coil strand may be connected in parallel with each other.

In addition, the case assembly according to the present embodiment is a case assembly of a portable device that wirelessly receives power and stores the received power in a battery. 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; A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; and a second coil strand formed on the other surface of the substrate, And a plurality of bypass vias passing through the substrate at a location adjacent the withdrawal pattern and connecting the first coil strand and the second coil strand, wherein the helical pattern is shorted at a location adjacent the withdrawal pattern A coil pattern that is coupled to the second coil strand via the bypass vias; A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; And a pad connection via which extends in a vertical direction from the first contact pad through the substrate to the other surface of the substrate and is electrically connected to the second coil strand; And the first coil strand and the second coil strand may be connected in parallel with each other.

Since the thin film coil according to the present invention does not use a wire type coil but forms a coil pattern on a thin thin film substrate as in the prior art, the thickness of the thin film coil can be made very thin.

In addition, the thin film coil according to the present invention has one coil pattern formed by a plurality of coil strands connected in parallel. Therefore, a coil (e.g., Litz wire) formed by twisting a plurality of strands of wires ) Can be obtained. When a twisted coil is used as described above, it is possible to minimize the loss (e.g., AC resistance value) caused by eddy current and skin effect at low frequencies.

Further, in the thin film coil according to the present invention, all of the contact pads can be disposed outside the coil pattern without using a multilayer board or a bridge. Therefore, it is possible to reduce the time and cost of manufacturing the thin-film coil and to reduce the overall thickness of the thin-film coil or the electronic equipment having the thin-film coil.

1 is a perspective view schematically showing an electronic apparatus according to an embodiment of the present invention.
2 is a cross-sectional view taken along line A-A 'in Fig.
3 is an exploded perspective view schematically showing the wireless power receiving apparatus of FIG. 2 of the present invention.
4 is an exploded cross-sectional view taken along line B-B 'of FIG. 3;
5 is a cross-sectional view of the wireless power receiving apparatus of FIG. 4 combined;
Fig. 6 is a partial perspective view enlargedly showing a portion C in Fig. 3; Fig.
7 is a perspective view showing a lower surface of a thin-film coil according to an embodiment of the present invention.
8 is a partial perspective view enlargedly showing part E of Fig.
FIG. 9 is a partial cross-sectional view showing a cross section taken along the line D-D 'in FIG. 6; FIG.
10 is a perspective view schematically showing a thin-film coil according to another embodiment of the present invention.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present embodiment, the wireless power transmission apparatus generally refers to a wireless power transmission apparatus for transmitting power and a wireless power reception apparatus for receiving and storing power.

FIG. 1 is a perspective view schematically showing an electronic device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A 'of FIG.

1 and 2, the electronic device according to the present embodiment may be a portable device 10 or a charging device 20, and may also be a wireless power reception device provided in the portable device 10 or the charging device 20 May be device 100 or wireless power transmission device 200.

The portable device 10 may include a battery 12 and a wireless power receiving apparatus 100 for supplying power to the battery 12 to charge the battery 12. [

The battery 12 may be a secondary battery capable of charging and discharging, and may be detachably attached to the portable device 10.

The wireless power receiving apparatus 100 may be accommodated in the case 11 of the portable device 10 and attached directly to the inner surface of the case 11 or disposed as close as possible.

In addition, the charging device 20 according to the present embodiment is a portable And is provided to charge the battery 12 of the device 10. To this end, the charging device 20 may include a wireless power transmission device 200 inside the case 21.

The charging device 20 can convert the household AC power supplied from the outside into DC power and convert the DC power to an AC voltage of a specific frequency and provide the AC power to the wireless power transmitter 200. [ To this end, the charging apparatus 20 may include a voltage converting unit 22 for converting the household AC power source into an AC voltage having a specific frequency.

When the AC voltage is applied to the thin film coil (not shown) in the wireless power transmission apparatus 200, the magnetic field around the thin film coil changes. Accordingly, the wireless power receiving apparatus 100 of the electronic device 10 disposed adjacent to the wireless power transmitting apparatus 200 receives a voltage in accordance with the change of the magnetic field, and thereby the battery 12 is charged.

Hereinafter, the wireless power receiving apparatus 100 included in the portable device 10 will be described in more detail.

FIG. 3 is an exploded perspective view schematically showing the wireless power receiving apparatus of FIG. 2, FIG. 4 is an exploded sectional view taken along line B-B 'of FIG. 3, and FIG. 5 is a cross- .

3 to 5, the wireless power receiving apparatus 100 includes a magnetic portion 120 and a thin-film coil 110. The thin-

The magnetic portion 120 is formed in a flat plate shape (or sheet shape), and is disposed on one side of the thin film coil 110 and fixedly attached to the thin film coil 110. The magnetic portion 120 is provided to efficiently form a magnetic path of a magnetic field generated by the coil pattern 113 of the thin-film coil 110. For this, the magnetic portion 120 is formed of a material that can be easily formed into a magnetic path, and a ferrite sheet may be used.

However, the magnetic part 120 according to the present embodiment is not limited to the above-described configuration, and various applications such as forming a ferrite powder or a magnetic material solution on one surface of the thin film coil 110 can be applied.

On the other hand, although not shown, a metal sheet may be additionally provided on the outer surface of the magnetic portion 120 as needed in order to autonomously cut electromagnetic waves and leakage flux. The metal sheet may be made of aluminum or the like, but is not limited thereto.

The wireless power receiving apparatus 100 according to the present embodiment may further include a bonding portion 140 between the thin film coil 110 and the magnetic portion 120 so that the thin film coil 110 and the magnetic portion 120 are firmly fixed to each other. ) Can be interposed.

The adhesion portion 140 is disposed between the thin film coil 110 and the magnetic portion 120 and bonds the magnetic portion 120 and the thin film coil 110 to each other. The bonding portion 140 may be formed of an adhesive sheet or an adhesive tape and may be formed by applying an adhesive or a resin having adhesiveness to the surface of the substrate 112 or the magnetic portion 120. At this time, it is also possible to configure the bonding portion 140 to contain ferrite powder so that the bonding portion 140 has magnetism together with the magnetic portion 120.

The thin film coil 110 may include a substrate 112 and a coil pattern 113 formed on the substrate 112.

The substrate 112 of the thin film coil 110 according to the present embodiment may be a thin film substrate, for example, a flexible PCB. However, the present invention is not limited thereto, and can be variously used as long as it is a thin film such as a film or a thin printed circuit board and can form a wiring pattern.

FIG. 6 is an enlarged partial perspective view of part C of FIG. 3, and FIG. 7 is a perspective view of a lower surface of the thin-film coil according to the embodiment of the present invention. 8 is an enlarged partial perspective view of part E of FIG. 7, and FIG. 9 is a partial sectional view of a section taken along line D-D 'of FIG.

The coil pattern 113 according to the present embodiment is formed in the form of a wiring pattern on both sides of the substrate 112 and can be formed in a spiral shape on a plane formed by the substrate 112. [

The coil pattern 113 may include a plurality of coiled strands 117, 118 arranged side by side. At this time, the coil strands 117 and 118 may be connected to each other in parallel to form a single coil pattern 113. In this embodiment, the coil strands 117 and 118 are formed on both sides of the substrate 112, respectively, to form one coil pattern 113.

In order to connect the coil strands 117 and 118 in parallel, the thin film coil 110 according to the present embodiment may include a plurality of conductive connection vias 114. The connecting vias 114 may electrically connect the coil strands 117, 118 at opposite ends of the coil strands 117, 118 with each other. 6 and 8, the pad connecting vias 114 provided on the contact pads 119 side of the connection vias 114 are connected to the first contact pads (119 of FIG. 6) formed on one surface of the substrate 112 And extends vertically to the other surface of the substrate 112 through the substrate 112 and electrically connects the second coil strand formed on the other surface of the substrate 112. [

As shown in FIG. 6, in this embodiment, the connection via 114 is formed at the inner end of the contact pad 119 and the spiral pattern 117a, respectively. However, the present invention is not limited thereto, and various shapes and various shapes can be formed at various positions according to the shape and structure of the coil pattern 113. [

The coil pattern 113 according to the present embodiment is configured such that any one of the coil strands 117 and 118 (hereinafter referred to as a first coil strand) formed on both sides of the substrate 112 has a helical pattern 117a, And a drawing pattern 117d arranged to cross the spiral pattern 117a at one end disposed inside the pattern 117a.

The lead pattern 117d is provided to connect the end of the spiral pattern 117a to the outside of the coil pattern 113, that is, the contact pad 119 described later. Therefore, the lead-out pattern 117d is formed in the form of a pattern that electrically connects the end of the innermost spiral pattern 117a to the contact pad 119. [

9, the helical pattern 117a of the first coil strand 117 is formed so as to bypass the center of the drawn pattern 117d at the portion where the drawn pattern 117d is disposed. That is, the spiral pattern 117a of the first coil strand 117 is formed with at least one bypass path via the other surface of the substrate 112 at the portion where the drawing pattern 117d is disposed, The coil shape can be maintained without interfering with the drawing pattern 117d.

The bypass path may be formed so as not to contact the coil strand (hereinafter referred to as the second coil strand) disposed on the other side of the substrate 112 (not shown). In this case, the bypass path may be disposed in the space between the second coil strands 118.

In this case, however, the entire area of the thin film coil is increased due to the bypass path.

Therefore, the thin film coil 100 according to the present embodiment forms a bypass path by using the second coil strand 118. That is, the bypass path according to the present embodiment is configured to partially share the second coil strand 118.

As shown in Figs. 6 and 9, the conductive spiral vias 115 are disposed in the spiral pattern 117a according to the present embodiment at portions where the spiral patterns 117a are cut off by the extraction pattern 117d. The first coil strand 117 is electrically connected to the second coil strand 118 by the bypassing via 115.

Thus, one bypass path according to the present embodiment includes two bypass vias 115 and a portion of the second coil strand 118 disposed between the bypass vias 115 (S in Fig. 9, Section). This bypass path may be formed by a number corresponding to the number of turns of the helical pattern 117a.

The coil pattern 113 according to the present embodiment is formed such that the positions of the first coil strand 117 and the second coil strand 118 are mutually projected through the substrate 112 . Accordingly, when the via holes 115 are formed perpendicular to the substrate 112, the first coil strand 117 and the second coil strand 118 are electrically connected to each other by the via holes 115, As shown in FIG.

The first and second coil strands 117 and 118 are independently disposed on both sides of the substrate 112 to the position where the lead pattern 117d is formed, The second coil strand 118 on the other side of the substrate 112 is shared with the portion where the lead pattern 117d is formed.

The coil pattern 113 is formed so that the coil strands 117 and 118 are electrically connected to each other only by the number of turns of the coil pattern 113 in the middle of the pattern, And are electrically connected to each other.

In this embodiment, the lead pattern 117d is formed on the first coil strand 117 formed on the upper surface of the substrate 112. In this case, However, the present invention is not limited to this, and it is also possible to form a drawing pattern on the lower surface, that is, the second coil strand 118, rather than the upper surface of the substrate 112.

In the present embodiment, the coil strands 117 and 118 formed on both sides of the substrate 112 are formed at positions projected from each other via the substrate 112. However, It is not limited. That is, the coil strands 117 and 118 formed on the respective surfaces of the substrate 112 may be formed at mutually offset positions instead of being projected to each other. In this case, the bypassing vias may be formed in an oblique direction or stepped shape that is not perpendicular to the substrate to connect the coil strands.

In this embodiment, the coil pattern 113 is formed as a quadrangular spiral shape. However, the present invention is not limited thereto, and various applications such as a circular or polygonal spiral shape are possible.

In addition, an insulating protective layer (for example, a resin insulating layer, not shown) for protecting the coil pattern 113 from the outside can be added to the upper portion of the coil pattern 113 as needed.

On the other hand, a contact pad 119 for electrically connecting the coil pattern 113 to the outside may be formed on one side of the substrate 112, that is, outside the coil pattern 113.

Both ends of the coil pattern 113 are electrically connected to the contact pad 119. At least two of the coil patterns 113 may be provided.

Further, the contact pads 119 according to the present embodiment are all disposed on the outside of the coil pattern 113. Even though all of the contact pads 119 are disposed outside the coil pattern 113 as described above, the thin film coil according to the present embodiment has both ends of the coil pattern 113 via the bypass path and the lead-out pattern 117d described above, (Not shown).

6, the contact pads 119 according to the present embodiment may be arranged to protrude from the rectangular substrate 112 to one side of the substrate 112. In this case, Therefore, the contact pad 119 according to the present embodiment is exposed to the outside of the magnetic portion 120 even when the thin film coil 110 and the magnetic portion 120 are coupled.

Therefore, the thin film coil 110 according to the present embodiment can easily electrically connect the coil pattern 113 and other components (for example, a battery, a voltage converter, and the like) after the magnetic coil 120 is coupled with the coil.

In the present embodiment, the coil strands 117 and 118 formed on the respective surfaces of the substrate 112 are formed as one strand, but the present invention is not limited thereto. And may be formed of a plurality of strands as in the example.

The thin film coil 110 according to the present embodiment is configured such that the number of the coil strands 117 and 118 that can be formed on one side of the substrate 112 is set according to the size of the substrate 112, .

In other words, when the size of the substrate 112 is large, a plurality of coil strands other than one may be formed on one side of the substrate 112 as shown in FIG. 10, Only one coil strand 117 and 118 may be formed on one side of the substrate 112 as in the present embodiment.

Although not shown, the wireless power receiving apparatus 100 according to the present embodiment provides power generated in the coil pattern 113 of the thin-film coil 110 to the battery (12 in Fig. 2) of the electronic apparatus 10 The thin film coil 110 may further include a connection member for electrically connecting the contact pad 119 of the thin film coil 110 and the battery.

A conductive wire may be used as the connecting member, and a thin film circuit board (for example, a flexible board) having a wiring pattern formed therein may be used.

Since the wireless power receiving apparatus 100 according to the present embodiment uses the coil pattern 113 formed on the thin thin film substrate 112 without using a wire type coil as in the prior art, It is possible to form a very thin thickness of the substrate 110.

In addition, in the thin film coil 110 according to the present embodiment, one coil pattern 113 is formed by a plurality of coil strands 117 and 118 connected in parallel. Accordingly, although the coil pattern 113 according to the present embodiment is formed in a pattern on the substrate 112, a coil (for example, a Litz wire) in the form of a twisted wire formed by twisting a plurality of strands of wires, Can be obtained. When a twisted coil is used as described above, it is possible to minimize the loss (e.g., AC resistance value) caused by eddy current and skin effect at low frequencies.

As described above, the wireless power receiving apparatus 100 according to the present embodiment can minimize the thickness (for example, 0.1 mm or less) of the thin film coil 110 even if the coil pattern 113 is formed in a twisted shape, 100 can be reduced.

In addition, in the wireless power receiving apparatus 100 according to the present embodiment, the contact pads 119 of the thin-film coil are all disposed on the side surface of the substrate 112. Another advantage is that a separate structure is not added to the substrate 112 for disposing the contact pad 119 on the side surface of the substrate 112. [ This is explained as follows.

Among the contact pads 119 connected to both ends of the coil pattern 113, the contact pads 119 connected to the coil pattern 113 which is wound toward the inside (that is, the center) of the coil pattern 113, 113, but is easily disposed inside the pattern. In this case, the contact pads disposed inside the coil pattern 113 should be electrically connected to the outside through a separate conductive wire or a connection board (e.g., FPCB).

In order to dispose the contact pad on the outside of the coil pattern 113 as in the present invention, a bridge may be formed on the coil pattern 113 with an insulating material to form a pattern, or a multilayer substrate Should be used.

In this case, a manufacturing time or a manufacturing cost is additionally required to form a bridge on the substrate or to manufacture a multilayer substrate, and the overall thickness of the substrate 112 also becomes thick.

However, in the thin film coil 100 according to the present embodiment, all the contact pads 119 can be disposed outside the coil pattern 113 without using a multilayer board or a bridge. Therefore, the manufacturing time and manufacturing cost can be reduced and the thickness of the thin film coil 100 or the wireless power receiving apparatus 100 can be prevented from becoming thicker as compared with the above case.

The configuration of the thin film coil 100 described above can be similarly applied to the wireless power transmission apparatus 200 provided in the charging apparatus 20. [ Therefore, a detailed description of the wireless power transmission apparatus 200 will be omitted.

The thin film coil according to the embodiment described below is constructed in a structure similar to the thin film coil (110 in FIG. 6) of the above-described embodiment, and has a difference only in the form of the coil pattern. Therefore, the same reference numerals are used for the same constituent elements, detailed description thereof will be omitted, and the coil pattern will be described in more detail.

10 is a perspective view schematically showing a thin-film coil according to another embodiment of the present invention.

Referring to FIG. 10, the thin film coil 110 according to the present embodiment may include a thin film substrate 112 and a coil pattern 113 formed on the substrate 112 as in the above embodiment have.

The coil pattern 113 according to the present embodiment includes a plurality of coil strands 117a to 117c arranged side by side. At this time, the plurality of coil strands 117a to 117c are all electrically connected to the same contact pad 119. Accordingly, the respective coil strands 117a to 117c are connected in parallel to each other to form one coil pattern 113.

In this embodiment, the coil pattern 113 is formed on one surface of the substrate 112 as three coil strands 117a to 117c. In this case, the coil strands 117a to 117c of the coil pattern 113 are spaced apart from each other at regular intervals.

Similar to the above-described embodiment, the coil pattern 113 according to the present embodiment also includes a drawing pattern 117d and a plurality of bypassing vias 115. [ Therefore, since it is not necessary to use a multilayer substrate or a bridge, the contact pad 119 can be disposed outside the coil pattern 113 without increasing the thickness of the substrate 112, thereby reducing the overall thickness of the thin film coil or the wireless power receiving device , Manufacturing time and manufacturing cost can be reduced.

On the other hand, FIG. 10 shows an example in which the lead pattern 117d is formed by one coil strand. However, the present invention is not limited to this, and the lead pattern 117d may be formed of a plurality of coil strands like the other portions of the coil pattern 113. [

In addition, in the case of the coil strand (not shown) formed on the lower surface of the substrate 112, a plurality of coil strands (not shown) like the coil strands 117a to 117c formed on the upper surface of the substrate 112 may be formed. However, the present invention is not limited thereto. That is, the coil strands 117a to 117c formed on the upper surface of the substrate 112 are formed on the lower surface of the substrate 112 through the via holes 115, such that only one coil- But may be formed in various forms as needed, as long as the coil can be electrically connected to the coil strand.

The thin film coil and the electronic apparatus having the thin film coil according to the present invention described above are not limited to the above-described embodiments, and various applications are possible. For example, although the case where the contact pads of the thin-film coil are arranged in the same direction of the substrate is described as an example in the above-described embodiments, various applications such as arranging the contact pads on both sides of the substrate as necessary are possible.

Also, in the above-described embodiments, the thin film coil included in the wireless power transmission apparatus of the electronic device has been described as an example.

However, the present invention is not limited thereto, and can be widely applied to electronic parts and electronic devices such as a transformer and a motor in which coils are used.

10 ..... Electronic devices
11, 12 ..... case
12 ..... Battery 20 ..... Charging device
100 ..... wireless power receiver
110 ..... Thin film coil 112 ..... Substrate
113 ..... coil pattern
114 ..... Via connection 115 ..... Via for bypass
117 ..... first coil strand
117a ..... Spiral pattern 117d ..... Draw pattern
118 ..... second coil strand
120 ..... magnetic part 140 ..... adhesive part
200 ..... wireless power transmitter

Claims (10)

1. A thin film coil provided in a wireless power transmission apparatus for wirelessly transmitting power or a wireless power reception apparatus for wirelessly receiving power transmitted from the wireless power transmission apparatus and storing the wireless power in a battery,
Board;
A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; and a second coil strand formed on the other surface of the substrate, And a plurality of bypass vias passing through the substrate at a location adjacent the withdrawal pattern and connecting the first coil strand and the second coil strand, wherein the helical pattern is shorted at a location adjacent the withdrawal pattern A coil pattern that is coupled to the second coil strand via the bypass vias;
A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; And
A pad connection via which extends vertically from the first contact pad to the other surface of the substrate through the substrate and is electrically connected to the second coil strand; Lt; / RTI >
Wherein the first coil strand and the second coil strand are connected in parallel to each other.
delete delete delete 2. The method of claim 1, wherein the first coil strand and the second coil strand
Wherein the thin film coil is disposed at a position corresponding to a vertical direction on both sides of the substrate.
A wireless power receiving apparatus wirelessly receiving power transmitted from a wireless power transmission apparatus and storing the received power in a battery,
A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; a second coil strand formed on the other surface of the substrate; And a plurality of bypass vias passing through the substrate at a position adjacent to the drawing pattern and connecting the first coil strand and the second coil strand, wherein the spiral pattern is shorted at a position adjacent to the drawing pattern, A coil pattern comprising a via coil connected to the second coil strand via a bypass hole;
A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery;
A pad connection via which extends vertically from the first contact pad to the other surface of the substrate through the substrate and is electrically connected to the second coil strand; And
A magnetic portion located on one side of the substrate;
Lt; / RTI >
Wherein the first coil strand and the second coil strand are connected in parallel with each other.
The method of claim 6, wherein the substrate
Wherein the first contact pad and the pad connecting via are disposed at a portion of the magnetic portion protruding outside the magnetic portion.
A wireless power receiving device that wirelessly receives power and stores the received power in a battery; And
A case accommodating the wireless power receiving apparatus therein;
/ RTI >
The wireless power receiving apparatus includes:
A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; a second coil strand formed on the other surface of the substrate; And a plurality of bypass vias passing through the substrate at a position adjacent to the drawing pattern and connecting the first coil strand and the second coil strand, wherein the spiral pattern is shorted at a position adjacent to the drawing pattern, A coil pattern comprising a via coil connected to the second coil strand via a bypass hole;
A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery;
A pad connection via which extends vertically from the first contact pad to the other surface of the substrate through the substrate and is electrically connected to the second coil strand; And
A magnetic portion located on one side of the substrate;
Lt; / RTI >
Wherein the first coil strand and the second coil strand are connected in parallel with each other.
9. The wireless power receiving apparatus according to claim 8,
And is directly or indirectly disposed on the inner surface of the case.
A case assembly for a portable device that wirelessly receives power and stores it in a battery,
Thin film coil; And
A case of the portable device disposed on the other side of the thin film coil;
/ RTI >
The thin-
Board;
A first coil strand formed on one surface of the substrate and including a spiral pattern and a drawing pattern drawn out of the spiral pattern at one end disposed inside the spiral pattern; and a second coil strand formed on the other surface of the substrate, And a plurality of bypass vias passing through the substrate at a location adjacent the withdrawal pattern and connecting the first coil strand and the second coil strand, wherein the helical pattern is shorted at a location adjacent the withdrawal pattern A coil pattern that is coupled to the second coil strand via the bypass vias;
A first contact pad disposed on one side of the substrate and connected to the first coil strand so as to be electrically connected to the battery; And a pad connection via which extends in a vertical direction from the first contact pad through the substrate to the other surface of the substrate and is electrically connected to the second coil strand;
Lt; / RTI >
Wherein the first coil strand and the second coil strand are connected in parallel with each other.

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