Microcoil element, arrayed microcoil element and device

Abstract

The present invention relates to a microcoil element, an arrayed microcoil element, and a device. The microcoil element comprises at least one wiring layer, on which are disposed a plurality of microcoil units. The microcoil units comprise multiple metal wire segments, each of which is wired from a starting point and loops around the starting point to form multiple continuous loops. Each metal wire segment has a first electrode terminal and a second electrode terminal at its ends. Furthermore, an electrode layer comprises first and second electrode regions, which respectively connect the first and second electrode terminals of each of the multiple metal wire segments. The present invention increases current density while simultaneously reducing overall resistance through parallel connection, enabling the microcoil element to achieve a more powerful magnetic field while being compact.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical components, and in particular to a micro-coil element, an array-type micro-coil element and a device. Background Art

[0002] Common magnetic components that can generate magnetic fields, such as magnets or coils formed by metal windings, have a certain volume and weight. If used in electronic devices, they often make the electronic devices heavier or require a certain amount of space to install these magnetic components.

[0003] If used in electronic devices that require miniaturization, such as headphones, hearing aids, or small speakers, these magnetic components require special materials or designs to be installed in the device. Alternatively, there are requirements for generating a specific magnetic field strength and related physical limitations that limit the effectiveness of miniaturization. Alternatively, the volume and weight of the magnetic components must be deliberately reduced to meet the needs of miniaturization, thereby reducing the effectiveness of the magnetic components.

[0004] Although there have been significant advances in the materials of magnetic components capable of generating magnetic fields, there are still physical limitations and high cost issues. Summary of the Invention

[0005] The object of the present invention is to provide a micro-coil element, an arrayed micro-coil element and a device that can have both high magnetic field strength and small size.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A micro-coil element comprising:

[0008] At least one wiring layer, comprising a plurality of metal wire segments starting from a starting point and surrounding the starting point to form a plurality of continuous wiring loops, each metal wire segment having a first electrode end and a second electrode end at its two ends, wherein the starting point is a first electrode of the micro-coil element, and the ends of the plurality of continuously wired metal wire segments are a second electrode of the micro-coil element; and

[0009] An electrode layer is provided with at least one first electrode region and at least one second electrode region, the at least one first electrode region is used to collect the first electrode end of each metal wire segment in the multiple metal wire segments, and the at least one second electrode region is used to collect the second electrode end of each metal wire segment in the multiple metal wire segments.

[0010] The electrode layer is provided with a plurality of metal wires for guiding the first electrode end of each metal wire segment on the wiring layer to the at least one first electrode region, and guiding the second electrode end of each metal wire segment on the wiring layer to the at least one second electrode region.

[0011] It also includes at least one electrical connection layer, in which a plurality of metal wires are provided for guiding the first electrode end of each metal wire segment on the wiring layer to at least one first electrode region of the electrode layer, and for guiding the second electrode end of each metal wire segment to at least one second electrode region of the electrode layer.

[0012] The first electrode end of each metal wire segment on the wiring layer is a negative electrode, and the second electrode end is a positive electrode. The positive electrodes of multiple metal wire segments are connected in parallel through guide holes, and the negative electrodes are connected in parallel through guide holes.

[0013] The starting point forms the first electrode of the micro-coil element, and a plurality of continuously wired metal wire segments form a concentric circle or a concentric polygon surrounding the starting point.

[0014] When the micro-coil element includes more than two wiring layers, the two or more wiring layers are stacked, and an insulating layer is provided between two adjacent wiring layers.

[0015] The micro-coil element further includes at least one magnetic conductive layer, which is made of a magnetic conductive material. An insulating layer is provided between the magnetic conductive layer and the wiring layer.

[0016] An array micro-coil element, comprising:

[0017] At least one wiring layer, wherein a plurality of micro-coil units are provided on the wiring layer, wherein the micro-coil units include multiple metal wire segments that start from a starting point and surround the starting point to form multiple turns of continuous wiring, each metal wire segment having a first electrode end and a second electrode end at its two ends, wherein the starting point is a first electrode of the micro-coil unit, and the ends of the multiple continuously wired metal wire segments are a second electrode of the micro-coil unit; and

[0018] An electrode layer is provided with at least one first electrode region and at least one second electrode region, wherein the at least one first electrode region is used to collect the first electrode ends of each metal wire segment in a plurality of metal wire segments, and the at least one second electrode region is used to collect the second electrode ends of each metal wire segment in a plurality of metal wire segments.

[0019] The electrode layer is provided with a plurality of metal wires for guiding the first electrode end of each metal wire segment on the wiring layer to the at least one first electrode region, and guiding the second electrode end of each metal wire segment to the at least one second electrode region.

[0020] The arrayed microcoil element also includes at least one electrical connection layer, which is provided with a plurality of metal wires for guiding the first electrode end of each metal wire segment on the wiring layer to the at least one first electrode region of the electrode layer, and guiding the second electrode end of each metal wire segment to the at least one second electrode region of the electrode layer.

[0021] The first electrode end of each metal wire segment on the wiring layer is a negative electrode, and the second electrode end is a positive electrode. The positive electrodes of multiple metal wire segments are connected in parallel through guide holes, and the negative electrodes are connected in parallel through guide holes.

[0022] Each wiring layer corresponds to a total negative contact area and a total positive contact area. Each micro-coil unit on each wiring layer connects at least one first electrode area and at least one second electrode area of ​​the electrode layer to the total negative contact area and the total positive contact area respectively through a guide hole, so as to connect the multiple micro-coil elements in parallel.

[0023] When the array-type micro-coil element includes more than two wiring layers, the more than two wiring layers are stacked, and an insulating layer is provided between two adjacent wiring layers.

[0024] The micro-coil element further includes at least one magnetic conductive layer, which is made of a magnetic conductive material. An insulating layer is provided between the magnetic conductive layer and the wiring layer.

[0025] The arrayed micro-coil element is provided with micro-coil units having the same or different shapes or sizes.

[0026] The wiring layer of the arrayed micro-coil element is further provided with an outer coil unit surrounding one or more micro-coil units.

[0027] A microcoil device comprising:

[0028] at least one magnetic element, the magnetic element being composed of a micro-coil element; and

[0029] a circuit board connected to a power source to supply power to the at least one magnetic element;

[0030] The microcoil element includes:

[0031] At least one wiring layer, the wiring layer including one or more coil units, the coil units having multiple metal wire segments starting from a starting point and surrounding the starting point to form multiple turns of continuous wiring, each metal wire segment having a first electrode end and a second electrode end at its two ends, wherein the starting point is a first electrode of the micro-coil element, and the ends of the multiple continuously wired metal wire segments are a second electrode of the micro-coil element; and

[0032] An electrode layer is provided with at least one first electrode region and at least one second electrode region, wherein the at least one first electrode region is used to collect the first electrode ends of each metal wire segment in a plurality of metal wire segments, and the at least one second electrode region is used to collect the second electrode ends of each metal wire segment in a plurality of metal wire segments.

[0033] The magnetic element is a single micro-coil element or an array of micro-coil elements.

[0034] The wiring layer is provided with two or more micro-coil units, and the shapes or sizes of the two or more micro-coil units are the same or different.

[0035] The wiring layer is further provided with an outer coil unit surrounding one or more micro coil units.

[0036] The magnetic element further includes a wafer. The magnetic element is arranged on the wafer, and the wafer is a magnetic wafer.

[0037] After adopting the above scheme, the present invention has the following beneficial effects:

[0038] A single microcoil element can be used to implement a magnetic element in an electronic device, or multiple microcoil elements can be used to form an array of microcoil elements. Specifically, because each microcoil element is composed of multiple metal wire segments, compared to conventional coil designs, the microcoil design proposed in this invention utilizes multiple, unconnected wire segments in a looped manner to stack magnetic fields. This increases current density while simultaneously reducing overall resistance through parallel connection, enabling the microcoil element to achieve a more powerful magnetic field while maintaining a compact size. Thus, in terms of electrical design, the negative terminals of the multiple wire segments of each microcoil element can be connected to a negative contact area, while the positive terminals of the multiple wire segments of multiple microcoil elements can be connected to a positive contact area. This allows multiple metal wire segments to be connected in parallel, and can also be connected in parallel to a common negative and positive contact areas, achieving a layout design that connects multiple microcoil elements in parallel. Furthermore, various wiring parameters for the metal wire segments within the microcoil element can be determined based on actual requirements such as impedance, magnetic field, or size, providing a variety of applications.

[0039] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and illustration and are not intended to limit the present invention.

[0040] Figures in the specification

[0041] Figure 1 is a diagram showing an embodiment of a micro-coil element;

[0042] Figure 2 is a schematic diagram of the wiring layer of the micro-coil element;

[0043] Figure 3 is a schematic diagram of an embodiment of another contact surface on a micro-coil element;

[0044] Figures 4A to 4D Schematic diagrams of multiple embodiments of forming an array of micro-coil elements using micro-coil elements;

[0045] Figure 5A and Figure 5B A schematic diagram of an embodiment of wiring on a micro-coil element;

[0046] Figure 6 This is a schematic diagram of an embodiment of an electrode area for collecting the electrode ends of each metal wire segment in the electrode layer of a micro-coil element;

[0047] Figure 7 This is a second schematic diagram of an embodiment of an electrode region for collecting the electrode ends of each metal wire segment in the electrode layer of a micro-coil element;

[0048] Figure 8 This is a third schematic diagram of an embodiment of an electrode collection layer in a micro-coil element;

[0049] Figure 9 Schematic diagram of an embodiment of a mixed layer of contact units and electrode units in a micro-coil element;

[0050] Figure 10 is a schematic diagram of the magnetic field of an array micro-coil element; and

[0051] Figure 11 Schematic diagram of the earphone structure using microcoil elements.

[0052] Description of labels:

[0053] 10: metal wire;

[0054] 11: first electrode;

[0055] 12: second electrode;

[0056] 20: microcoil unit;

[0057] 21: first electrode;

[0058] 22: second electrode;

[0059] 201, 202, 203, 204, 205, 206, 207, 208, 209, 210: metal wire segments;

[0060] 30: contact unit;

[0061] 21': first electrode contact;

[0062] 22': second electrode contact;

[0063] 31: Contact;

[0064] 40, 41, 42, 43: arrayed microcoil elements;

[0065] 411, 421: microcoil unit;

[0066] 431: outer coil unit;

[0067] 50, 52: microcoil unit;

[0068] 60: negative electrode collection layer;

[0069] 61: electrode area;

[0070] 63: metal wire;

[0071] 70: positive electrode collection layer;

[0072] 71: electrode area;

[0073] 73: metal wire;

[0074] 80: electrode layer;

[0075] 81: first electrode region;

[0076] 82: second electrode region;

[0077] 90: electrode layer;

[0078] 91, 92, 93, 94, 95: electrode unit;

[0079] 100: Schematic diagram of the magnetic field of the array microcoil;

[0080] 11: speaker device;

[0081] 111: outer shell;

[0082] 112: diaphragm;

[0083] 113: washer;

[0084] 114: magnetic element;

[0085] 115: magnetic conductor;

[0086] 116: Circuit board. DETAILED DESCRIPTION

[0087] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted in actual size. It is stated in advance. The following embodiments will further explain the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention.

[0088] It should be understood that although terms such as "first," "second," and "third" may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. In addition, the term "or" as used herein may include any one or more combinations of the associated listed items, depending on the actual situation.

[0089] This embodiment discloses a micro-coil element, an arrayed micro-coil element formed by a plurality of micro-coil elements, and a device that implements a magnetic element therein by a single micro-coil element or an arrayed micro-coil element.

[0090] The basic structure of the microcoil element is as follows Figure 1 In the embodiment diagram shown, a micro-coil element can be formed into a continuous metal wire 10 on a substrate (such as an insulator) through a printing process, a mask and an etching process, and electrical contacts are formed at both ends of the metal wire 10. A first electrode 11 at one end can be the negative electrode of the micro-coil element, and a second electrode 12 at the other end can be the positive electrode of the micro-coil element.

[0091] When the microcoil element is connected to a power source and energized, the steady current flowing through it can form a uniform magnetic field on the microcoil element. The material, width, length, and number of turns of the metal wire 10 are all parameters that determine the impedance value of the entire microcoil element. Therefore, when designing this microcoil element, it is necessary to understand the impedance and the desired magnetic field conditions.

[0092] The main implementation method of the micro-coil element proposed in this embodiment is to form multiple breakpoints on the metal wire of the micro-coil element according to the needs, such as Figure 2 A schematic diagram of one embodiment of wiring on a micro-coil element is shown.

[0093] The microcoil element of this embodiment includes at least one wiring layer and an electrode layer. When two or more wiring layers are provided, the two or more wiring layers are stacked, and an insulating layer is provided between two adjacent wiring layers. Each wiring layer is provided with one or more microcoil units.

[0094] Figure 2This is a schematic diagram of the structure of a microcoil element in this embodiment, in which the wiring layer includes only one microcoil unit. The microcoil unit is provided with multiple metal wire segments (201, 202, ..., 210) that start from a starting point and wrap around the starting point to form multiple continuous loops. The starting point can be located anywhere in the microcoil element, preferably near the center of the microcoil element, but this is not limited to this location and can be determined based on actual needs. This starting point forms a first electrode 21, for example, the negative electrode of the microcoil element. The end of the metal wire segment, that is, the end of the multiple continuously routed metal wire segments, forms a second electrode 22 of the microcoil element, which can be the positive electrode of the microcoil element.

[0095] Each of the multiple metal wire segments (201, 202, ..., 210) has two endpoints, one of which is a first electrode end, such as an end of the first electrode 21 formed closer to the starting point; the other end is a second electrode end, which is an endpoint closer to the end of the metal wire segment.

[0096] Then as Figure 3 As shown, this figure shows the electrode layer 30 of the micro-coil element, which is provided with contacts 31 corresponding to the two end points of multiple metal wire segments on the wiring layer, and the other side electrodes corresponding to the first electrode 21 and the second electrode 22, such as the first electrode contact 21' and the second electrode contact 22'.

[0097] according to Figure 2 and Figure 3 The structural features of the wiring layer in the micro-coil element shown in the figure indicate that the design of the proposed micro-coil element can determine the total length, line width, line spacing between adjacent metal segments, length, number of turns, turn spacing, and / or material of the metal segments based on actual requirements (such as impedance, magnetic field, or size). The actual requirements are mainly the requirements of the micro-coil device to be used, and based on these requirements, it can also be determined whether a single micro-coil element is used, or whether a micro-coil element is used. Figures 4A to 4D In the embodiment shown, a plurality of micro-coil units arranged in an array are provided on each wiring layer.

[0098] according to Figure 4A The arrayed micro-coil element 40 is shown to be composed of a plurality of micro-coil units 20 arranged in an array. The shape of the arrayed micro-coil element 40 and the number of micro-coil elements therein are not intended to limit the scope of implementation thereof.

[0099] Similarly, each microcoil unit in the figure is still provided with multiple metal wire segments that start from a starting point and surround the starting point to form multiple turns of continuous wiring, as well as an electrode layer, wherein at least one first electrode region and at least one second electrode region are provided to respectively collect the first electrode end and the second electrode end of each metal wire segment. According to actual needs and design, there can be one or more first electrode regions and second electrode regions. It is worth mentioning that the first electrode region and the second electrode region that collect the first electrode end and the second electrode end of each metal wire segment can realize the function of collecting the electrode ends through an electrical connection layer in another component. For example, in this electrical connection layer, multiple metal wires can be used to guide the first electrode end of each metal wire segment on the wiring layer through a via or a wire on its substrate to the first electrode region of the electrode layer, and also guide the second electrode end of each metal wire segment to the second electrode region of the electrode layer.

[0100] Figure 4A The coil elements in the array micro-coil element shown are of the same shape and size. In addition to the above embodiments, the array micro-coil element can be provided with multiple micro-coil elements of different shapes or sizes according to actual needs (such as magnetic field requirements). Figure 4B and Figure 4C .

[0101] Figure 4B Another embodiment of an arrayed microcoil element 41 is shown, which is composed of a plurality of microcoil units 20 arranged in an array. In the circuit layout covering the plurality of microcoil units 20, according to the requirements of a magnetic field, another microcoil unit 411 can be designed to cover a larger area (but the scale can still be as small as a few millimeters). The position is not limited to this illustration. The microcoil units 20 around or on one side can interact with this microcoil unit 411 (such as magnetic field amplification or offset effects), so that the entire arrayed microcoil element 41 can meet the requirements of a specific magnetic field design.

[0102] Figure 4C Another embodiment of an arrayed micro-coil element 42 is shown. This example demonstrates that in the magnetic field design of a magnetic element, another larger micro-coil unit 421 can be provided among multiple micro-coil units 20 in an array layout. This micro-coil unit 421 can have a shape different from that of the other micro-coil units 20. Similarly, the micro-coil unit 421 and its neighboring micro-coil units 20 also produce varying degrees of magnetic field amplification or offset effects, resulting in an equivalent magnetic field that meets the requirements.

[0103] According to the requirements of equivalent magnetic field, the arrayed micro-coil element may further be provided with an outer coil unit surrounding one or more micro-coil elements, for example Figure 4DThe arrayed micro-coil element 43 shown has an outer coil unit 431 formed in the outer circle of the array layout formed by multiple micro-coil units 20. In addition, the coil unit 431 surrounds the multiple micro-coil units 20 in the inner circle. Similarly, under the requirements of a specific magnetic element, the arrayed micro-coil element 43 shown in the figure can be obtained by combining the design of the outer coil unit 431 with the number, area, length, thickness and material of the micro-coil units 20.

[0104] It is worth mentioning that, in addition to the design that may be specially considered for a specific application, according to the main embodiment, each Figure 2 、 Figures 4A to 4D The single micro-coil unit shown, when energized, can generate currents in the same direction in multiple metal wire segments, thereby forming a magnetic field equivalent to that formed by a multi-turn coil. If an array of micro-coil elements 40, 41, 42, and 43 is composed of multiple micro-coil elements 20, the entire array can also generate an equivalent magnetic field that can eliminate the weaker uneven magnetic fields at the edges of individual micro-coil elements.

[0105] It should be mentioned here that the micro-coil unit 20 or various array-type micro-coil elements (40, 41, 42, 43) shown in the above figures can be used in combination and are not limited to the figures shown. The starting points of the multiple metal segments in each micro-coil unit (such as Figure 2 The first electrode 21 shown may be located at the electrode end close to the central region, and the starting point may also be located at any position deviating from the center according to actual design.

[0106] Apart from Figure 2 、 Figure 3 or Figures 4A to 4D The micro coil elements are in the form of Figure 5A The schematic diagram of an embodiment in which a microcoil unit 50 is formed by a single microcoil element is shown. The microcoil unit 50 shown in the figure has a starting point, such as an electrode end located near the central area, forming the first electrode of the single microcoil element, which can be the negative electrode of the entire element. This is the starting point of multiple metal wire segments. The figure shows that multiple continuously wired metal wire segments surround the starting point to form concentric polygons, and the ends of the multiple metal wire segments form the second electrode, such as the positive electrode of the entire element.

[0107] Figure 5B A schematic diagram shows an embodiment in which another micro-coil unit 52 is formed by a single micro-coil element. In the micro-coil unit 52, multiple metal wire segments surround a starting point, which is shown as a concentric circle in this example. The starting point of the multiple metal wire segments forms a first electrode, and the end portion forms a second electrode.

[0108] Figure 6Next, a schematic diagram of an embodiment of an electrode layer in a microcoil element that collects the electrode ends of each metal wire segment is shown, wherein a negative electrode collection layer 60 is shown that collects the first electrode ends (such as negative electrodes) of each of the multiple metal wire segments on the wiring layer, and is shown as an electrical pad, i.e., an electrode area 61, which can have sufficient area to connect multiple metal wires 63. The metal wires 63 are used in this negative electrode collection layer 60 to guide the connection of the negative electrodes in each metal wire segment in the wiring layer.

[0109] Figure 7 This is a schematic diagram of an embodiment of an electrode layer in a microcoil element that collects the other electrode end (such as the positive electrode) of each metal wire segment. This figure shows a positive electrode collection layer 70, which has an electrode area 71 designed to have sufficient area to connect multiple metal wires 73. Similarly, these metal wires 73 are used in this positive electrode collection layer 70 to guide the connection of the positive electrodes in each metal wire segment in the wiring layer.

[0110] According to the embodiment, Figure 6 and Figure 7 The electrode design shown can be a printed circuit on the same electrode layer, or two printed circuits on different electrode layers, or Figure 8 The schematic diagram of an embodiment of an electrode collection layer in a micro-coil element is shown. The electrode layer 80 shown is provided with a first electrode region 81 and a second electrode region 82. The electrodes of each metal wire segment on the wiring layer are guided to the first electrode region 81 and the second electrode region 82 according to the positive and negative polarity through guide holes or wires.

[0111] In general, in an electrode layer of each micro-coil element, or another additional electrical connection layer, multiple metal wires are used to guide the first electrode end of each metal wire segment on the wiring layer to the first electrode region 81, and also to guide the second electrode end of each metal wire segment to the second electrode region 82.

[0112] In electrical design, the first electrode end of each metal line segment on the wiring layer is the negative electrode, and the second electrode end is the positive electrode. The positive electrodes of multiple metal line segments are connected in parallel through guide holes, and the negative electrodes are connected in parallel through guide holes. Or, Figures 4A to 4D Various array-type micro-coil elements are shown, and each micro-coil element in the plurality of micro-coil elements connects the first electrode region and the second electrode region of the electrode layer in each element to the respective electrodes as shown in FIG. Figure 6 、 Figure 7 or Figure 8 The total negative contact area (such as electrode area 61 and first electrode area 81) and the total positive contact area (such as electrode area 71 and second electrode area 82) are realized to connect multiple micro-coil elements on the parallel array micro-coil element.

[0113] Figure 9 Another embodiment is shown as a contact unit corresponding to a single micro-coil element in an array of micro-coil elements (e.g. Figure 3Contact unit 30) and electrode unit (such as Figure 8 Schematic diagram of an embodiment of a mixed layer of a first electrode region 81 and a second electrode region 82).

[0114] According to the design of the array micro-coil element, the wiring design of the electrodes guiding each single micro-coil element is not limited to a specific embodiment, and a layer such as Figure 9 In the wiring design shown, a portion of the space is provided with multiple contact units 30 with various electrode contacts, and the electrode ends of each metal wire segment on the wiring layer can be guided to the electrode units 91, 92, 93, 94, 95 in another part of the figure through guide holes or wires.

[0115] When designing the microcoil element or array microcoil element, the size and shape of each microcoil element can be customized according to the product. Furthermore, the miniature, multi-segment design provides greater flexibility in determining the total length, line width, line spacing between adjacent metal wire segments, length, number of turns, turn spacing, and / or even the material of the metal wire segments of each microcoil element based on requirements such as impedance, magnetic field, and product size and shape. Furthermore, the spacing between adjacent microcoil units and / or the total number of microcoil elements can also be considered.

[0116] In another embodiment, a multi-layer structure can also be designed according to needs. The multi-layer structure includes a wiring layer, an electrode layer, or an electrode (positive electrode, negative electrode) collection layer for collecting various electrode lines. The micro-coil elements therein can be connected in parallel through vias or wires. Each micro-coil element further considers the various design parameters listed above, including the shape of each continuous multi-segment metal winding, which also considers the width and length of each segment, as well as the overall number of turns, turn spacing and total length.

[0117] When determining the parameters, the equivalent magnetic field generated by the entire micro-coil element is one of the main considerations. Further, the following can be designed: Figure 10 The arrayed micro-coil element is shown, which also shows a schematic diagram of the magnetic field distribution.

[0118] Since each Figure 2 、 Figure 5A and Figure 5B (But not limited to this) The single micro-coil element shown will form a magnetic field equivalent to that formed by a multi-turn coil after being energized. The magnetic field strength can be determined by the current passing through it. However, the edges of the single micro-coil element may have large magnetic field variations. Generally, the intensity is the largest in the middle and weaker at the edges. If you want to generate a large and uniform magnetic field, you can refer to Figure 10Schematic diagram of the magnetic field generated by an array of micro-coil elements. Because there are multiple micro-coil elements, the uniform magnetic field generated overall can eliminate the weaker, non-uniform magnetic fields at the edges of individual micro-coil elements. When energized, the multiple micro-coil elements are uniformly formed as a whole, forming an equivalent magnetic field covering a wider range.

[0119] In another embodiment, in order to further improve the magnetic field strength of the micro-coil, the micro-coil element further includes at least one magnetic conductive layer, which is made of a magnetic conductive material, and an insulating layer is provided between the magnetic conductive layer and the wiring layer.

[0120] The micro-coil components described in the above embodiments are mainly applicable to the magnetic components in electronic devices. Since the scale of the micro-coil components is small enough (for example, the current process adopts a 65-nanometer process, and the line diameter (line width) and line spacing can reach micrometer or nanometer levels), they can be applied to Figure 11 The headphone device shown not only reduces the space requirement therein, but also provides the advantage of multiple units covering multiple frequency bands.

[0121] like Figure 11 The speaker device 11 shown here is merely a general example, and its structure primarily includes an outer shell 111, a diaphragm 112, a gasket 113, a magnetic element 114, a magnetic conductor 115, and a circuit board 116. The one or more microcoil elements at least implement the magnetic element 114 in the speaker device 11. The circuit board 116 can be connected to a power source to supply power to the magnetic element 114 in the device. Furthermore, the magnetic element 114 can be a single microcoil element as described in the above embodiments, or an array of microcoil elements. Furthermore, the magnetic element 114 can be designed to include multiple layers of microcoil elements or a multi-layer array of microcoil elements, depending on impedance, magnetic field, or size requirements.

[0122] A typical speaker device 11 or headphone unit consists of a cone-shaped diaphragm 112, a magnetic element 114, and a voice coil formed by a magnetic conductor 115. When current passes through the magnetic element 114, a magnetic field is generated, which interacts with the magnetic conductor 115, causing the voice coil to move. Further changing the direction of the current in the magnetic element 114 generates a magnetic field of opposite polarity, which in turn changes the direction of movement of the voice coil, thereby driving the diaphragm 112. According to an embodiment, the magnetic element 114 can be implemented as a single or arrayed microcoil element. When energized, the microcoil element generates a magnetic field, which, due to better impedance control, drives the voice coil movement, resulting in more detailed and better sound output.

[0123] The coil element of a magnetic component is typically mounted on a wafer. To further enhance the magnetic field strength of the magnetic component, the wafer can be a magnetic wafer. This magnetic wafer can be made by doping the interior of the wafer with a magnetically conductive material, or by coating the back of the wafer with a layer of magnetically conductive material before or after the magnetic component is fabricated.

[0124] In summary, the various implementations of the microcoil elements described in the above embodiments demonstrate that a single microcoil element can be used to implement a magnetic element in an electronic device, or multiple microcoil elements can be used to form an array of microcoil elements. Specifically, because each microcoil element is composed of multiple metal wire segments, compared to conventional coil designs, the microcoil design proposed in this disclosure utilizes multiple, unconnected wire segments to stack magnetic fields in a looping fashion. This allows for increased current density while simultaneously reducing overall resistance through parallel connections. Thus, in terms of electrical design, the negative terminals of the multiple wire segments of each microcoil element can be connected to a negative contact region, while the positive terminals of the multiple wire segments of multiple microcoil elements can be connected to a positive contact region. This allows multiple metal wire segments to be connected in parallel, and can also be connected in parallel to a common negative and positive contact regions, achieving a layout design in which multiple microcoil elements are connected in parallel. Furthermore, the various wiring parameters of the metal wire segments in the microcoil element can be determined based on actual requirements such as impedance, magnetic field, or size, providing a variety of applications.

[0125] The contents disclosed above are only preferred feasible embodiments of the present invention and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the scope of the patent application of the present invention.

Claims

1. A micro-coil element, characterized in that: include: At least one wiring layer is provided with a plurality of metal wire segments starting from a starting point and surrounding the starting point to form a plurality of continuous wiring loops, each metal wire segment having a first electrode end and a second electrode end at its two ends, wherein the starting point is a first electrode of the micro-coil element, and the ends of the plurality of continuously wired metal wire segments are a second electrode of the micro-coil element; as well as An electrode layer is provided with at least one first electrode region and at least one second electrode region, the at least one first electrode region is used to collect the first electrode end of each metal wire segment in the multiple metal wire segments, and the at least one second electrode region is used to collect the second electrode end of each metal wire segment in the multiple metal wire segments.

2. The micro-coil element according to claim 1, wherein: The electrode layer is provided with a plurality of metal wires for guiding the first electrode end of each metal wire segment on the wiring layer to the at least one first electrode region, and guiding the second electrode end of each metal wire segment on the wiring layer to the at least one second electrode region.

3. The micro-coil element according to claim 1, wherein: It also includes at least one electrical connection layer, in which a plurality of metal wires are provided for guiding the first electrode end of each metal wire segment on the wiring layer to at least one first electrode region of the electrode layer, and for guiding the second electrode end of each metal wire segment to at least one second electrode region of the electrode layer.

4. The micro-coil element according to claim 2 or 3, wherein: The first electrode end of each metal wire segment on the wiring layer is a negative electrode, and the second electrode end is a positive electrode. The positive electrodes of multiple metal wire segments are connected in parallel through guide holes, and the negative electrodes are connected in parallel through guide holes.

5. The micro-coil element according to any one of claims 1 to 3, wherein: The starting point forms the first electrode of the micro-coil element, and a plurality of continuously wired metal wire segments form a concentric circle or a concentric polygon surrounding the starting point.

6. The micro-coil element according to claim 1, wherein: When the micro-coil element includes more than two wiring layers, the two or more wiring layers are stacked, and an insulating layer is provided between two adjacent wiring layers.

7. The micro-coil element according to claim 6, wherein: The micro-coil element further includes at least one magnetic conductive layer, which is made of a magnetic conductive material. An insulating layer is provided between the magnetic conductive layer and the wiring layer.

8. An array micro-coil element, characterized in that: include: At least one wiring layer, wherein a plurality of micro-coil units are provided on the wiring layer, wherein the micro-coil units include multiple metal wire segments starting from a starting point and surrounding the starting point to form multiple turns of continuous wiring, each metal wire segment having a first electrode end and a second electrode end at its two ends, wherein the starting point is a first electrode of the micro-coil unit, and the ends of the multiple continuously wired metal wire segments are a second electrode of the micro-coil unit; as well as An electrode layer is provided with at least one first electrode region and at least one second electrode region, wherein the at least one first electrode region is used to collect the first electrode ends of each metal wire segment in a plurality of metal wire segments, and the at least one second electrode region is used to collect the second electrode ends of each metal wire segment in a plurality of metal wire segments.

9. The arrayed micro-coil element according to claim 8, wherein: The electrode layer is provided with a plurality of metal wires for guiding the first electrode end of each metal wire segment on the wiring layer to the at least one first electrode region, and guiding the second electrode end of each metal wire segment to the at least one second electrode region.

10. The arrayed micro-coil element according to claim 8, wherein: The arrayed microcoil element also includes at least one electrical connection layer, which is provided with a plurality of metal wires for guiding the first electrode end of each metal wire segment on the wiring layer to the at least one first electrode region of the electrode layer, and guiding the second electrode end of each metal wire segment to the at least one second electrode region of the electrode layer.

11. The array micro-coil element according to claim 9 or 10, wherein: The first electrode end of each metal wire segment on the wiring layer is a negative electrode, and the second electrode end is a positive electrode. The positive electrodes of multiple metal wire segments are connected in parallel through guide holes, and the negative electrodes are connected in parallel through guide holes.

12. The array micro-coil element according to claim 9 or 10, wherein: Each wiring layer corresponds to a total negative contact area and a total positive contact area. Each micro-coil unit on each wiring layer connects at least one first electrode area and at least one second electrode area of ​​the electrode layer to the total negative contact area and the total positive contact area respectively through a guide hole, so as to connect the multiple micro-coil elements in parallel.

13. The arrayed micro-coil element according to claim 8, wherein: When the array-type micro-coil element includes more than two wiring layers, the more than two wiring layers are stacked, and an insulating layer is provided between two adjacent wiring layers.

14. The arrayed micro-coil element according to claim 13, wherein: The micro-coil element further includes at least one magnetic conductive layer, which is made of a magnetic conductive material. An insulating layer is provided between the magnetic conductive layer and the wiring layer.

15. The arrayed micro-coil element according to claim 8, wherein: The arrayed micro-coil element is provided with micro-coil units having the same or different shapes or sizes.

16. The arrayed micro-coil element according to claim 15, wherein: The wiring layer of the arrayed micro-coil element is further provided with an outer coil unit surrounding one or more micro-coil units.

17. A microcoil device, characterized in that: include: at least one magnetic element, the magnetic element being composed of a micro-coil element; as well as a circuit board connected to a power source to supply power to the at least one magnetic element; The microcoil element includes: At least one wiring layer, the wiring layer including one or more coil units, the coil units having multiple metal wire segments starting from a starting point and surrounding the starting point to form multiple turns of continuous wiring, each metal wire segment having a first electrode end and a second electrode end at its two ends, wherein the starting point is a first electrode of the micro-coil element, and the ends of the multiple continuously wired metal wire segments are a second electrode of the micro-coil element; and An electrode layer is provided with at least one first electrode region and at least one second electrode region, wherein the at least one first electrode region is used to collect the first electrode ends of each metal wire segment in a plurality of metal wire segments, and the at least one second electrode region is used to collect the second electrode ends of each metal wire segment in a plurality of metal wire segments.

18. The micro-coil device according to claim 17, wherein: The magnetic element is a single micro-coil element or an array of micro-coil elements.

19. The micro-coil device according to claim 17, wherein: The wiring layer is provided with two or more micro-coil units, and the shapes or sizes of the two or more micro-coil units are the same or different.

20. The micro-coil device according to claim 19, wherein: The wiring layer is further provided with an outer coil unit surrounding one or more micro coil units.

21. The micro-coil device according to claim 17, wherein: The magnetic element further includes a wafer. The magnetic element is arranged on the wafer, and the wafer is a magnetic wafer.

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