Coil electronic component

Abstract

The invention provides a coil electronic component. The coil electronic component includes: a body including a first surface and a second surface opposite to each other, and including a magnetic material; the coil comprises at least one turn of wire, and at least one part of the coil is embedded into the main body; a first external electrode connected to a first lead-out portion of the coil; and a second external electrode connected to a second lead-out portion of the coil, in which a cross-sectional shape of the conductive wire is a triangular shape.

Description

Technical Field

[0001] The present disclosure relates to a coil electronic assembly. Background Art

[0002] Recently, as functions of mobile devices are diversified, power consumption increases, and in order to increase battery life in the mobile devices, passive components with low loss and excellent efficiency are adopted around a power management integrated circuit (PMIC).

[0003] Inductors used to stabilize the power of mobile devices can be divided into stacked type, thin film type and wire-wound type based on how the coil is formed. During the manufacturing process of the wire-wound type inductor, a step of pressing a sheet made of a magnetic material onto the coil is performed, and in this process, the coil may be deformed or pushed due to high voltage, which may deteriorate the characteristics of the inductor. Summary of the invention

[0004] The present disclosure is intended to provide a coil electronic component capable of preventing a coil from being deformed during a manufacturing process.

[0005] However, the objects of the present disclosure are not limited to the above objects and can be expanded in various ways within the spirit and scope of the present disclosure.

[0006] An embodiment of the present disclosure provides a coil electronic component, comprising: a main body, comprising a first surface and a second surface opposite to each other, and comprising a magnetic material; a coil, comprising a first lead-out portion, a second lead-out portion and at least one turn of wire, wherein a cross-sectional shape of the wire comprises a triangular shape, and at least a portion of the coil is embedded in the main body; a first external electrode, connected to the first lead-out portion; and a second external electrode, connected to the second lead-out portion.

[0007] The coil may include a first part and a second part, the first part including at least one turn of the wire, the second part being connected to the first part and including at least one turn of the wire, the wire in the first part may be arranged so that one side of a triangular cross-section of the wire in the first part faces the first surface, and the wire in the second part may be arranged so that one side of a triangular cross-section of the wire in the second part faces the second surface.

[0008] The triangular cross-sections of the conductive wires in the first portion and the triangular cross-sections of the conductive wires in the second portion may be alternately arranged such that the triangular cross-sections of the conductive wires in the second portion are inverted relative to the triangular cross-sections of the conductive wires in the first portion.

[0009] Each of the two outermost turns of the wire in the first portion may have the triangular cross-section, and each of the two outermost turns of the wire in the second portion may have the triangular cross-section inverted relative to the triangular cross-section of the two outermost turns of the wire in the first portion.

[0010] The magnetic material may include metal magnetic particles, and the metal magnetic particles may include two or more particles having different components.

[0011] The metal magnetic particles may include iron (Fe).

[0012] The coil electronic component may further include an insulating film provided on a surface of the conductive wire.

[0013] The coil electronic component may further include an insulating layer disposed on a surface of the body except for a portion where the first lead-out portion is connected to the first external electrode and a portion where the second lead-out portion is connected to the second external electrode.

[0014] Another embodiment of the present disclosure provides a coil electronic component, comprising: a main body, comprising a magnetic material; a first coil, comprising at least one turn of a first wire, at least a portion of the first coil being embedded in the main body; and a second coil, spaced apart from the first coil, comprising at least one turn of a second wire, at least a portion of the second coil being embedded in the main body, wherein a cross-sectional shape of the first wire comprises a triangular shape, and a cross-sectional shape of the second wire comprises a triangular shape.

[0015] The first coil and the second coil may be edge-wound coils.

[0016] The body may include a core around which the first coil and the second coil are commonly wound.

[0017] The first coil may include a first part and a second part, the first part including at least one turn of the first wire, the second part being connected to the first part and including at least one turn of the first wire, the first wire in the first part may be arranged so that one side of a triangular cross-section of the first wire in the first part faces the core, and the first wire in the second part may be arranged so that one side of a triangular cross-section of the first wire in the second part faces the outer surface of the body.

[0018] The second coil may include a third part and a fourth part, the third part including at least one turn of the second wire, the fourth part being connected to the third part and including at least one turn of the second wire, the second wire in the third part may be arranged so that one side of a triangular cross-section of the second wire in the third part faces the core, and the second wire in the fourth part may be arranged so that one side of a triangular cross-section of the second wire in the fourth part faces the outer surface of the body.

[0019] The number of turns of the first coil and the number of turns of the second coil may be the same.

[0020] The number of turns of the first coil and the number of turns of the second coil may be different.

[0021] Another embodiment of the present disclosure provides a coil electronic component, comprising: a main body, comprising a magnetic material; and at least one coil, comprising a wire having a triangular cross-section, the at least one coil comprising a first part and a second part, the first part comprising at least one turn of the wire, the second part being connected to the first part and comprising at least one turn of the wire, wherein the triangular cross-section of the wire in the first part and the triangular cross-section of the wire in the second part are alternately arranged, wherein the triangular cross-section of the wire in the second part is inverted relative to the triangular cross-section of the wire in the first part, and wherein at least a portion of the coil is embedded in the main body.

[0022] The coil electronic component may further include: a first external electrode; and a second external electrode, wherein the at least one coil may further include: a first lead-out portion connected to the first external electrode, and a second lead-out portion connected to the second external electrode.

[0023] The at least one coil may include a first coil and a second coil, and the first coil and the second coil are edgewise wound coils.

[0024] Outermost wires of the two outermost turns of the wires in the first portion may be inclined toward the inner wire, and outermost wires of the two outermost turns of the wires in the second portion may be inclined toward the inner wire.

[0025] According to the coil electronic component according to the embodiment, by making the cross-sectional shape of the coil into a triangular shape, the coil can be prevented from being deformed during a process of manufacturing the coil electronic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of a coil electronics assembly according to an embodiment is shown.

[0027] Figure 2 Shown along Figure 1 A cross-sectional view taken along line II-II'.

[0028] Figure 3A , Figure 3B , Figure 3C and Figure 3D Various cross-sectional shapes of the wire of the coil are shown.

[0029] Figure 4 A cross-sectional view of a coil electronics assembly according to another embodiment is shown.

[0030] Figure 5 A perspective view of a coil electronics assembly according to another embodiment is shown.

[0031] Figure 6 Show Figure 5 A bottom perspective view of the coil electronic assembly.

[0032] Figure 7 Shown along Figure 5 A cross-sectional view taken along line VII-VII'. DETAILED DESCRIPTION

[0033] In the following detailed description, only specific embodiments of the present disclosure are briefly shown and described by way of illustration. The drawings and descriptions are considered to be illustrative and not restrictive in nature. Throughout the specification, the same reference numerals indicate the same elements. In the drawings, some constituent elements are exaggerated, omitted or briefly shown, and the sizes of the various constituent elements do not reflect the actual sizes.

[0034] The accompanying drawings are provided only to facilitate understanding of the embodiments disclosed in this specification and should not be interpreted as limiting the spirit disclosed in this specification. It should be understood that the present disclosure includes all modifications, equivalents, and replacements without departing from the scope and spirit of the present disclosure.

[0035] Terms including ordinal numbers such as first, second, etc. will only be used to describe various constituent elements and should not be interpreted as limiting these constituent elements. These terms are only used to distinguish one constituent element from another constituent element.

[0036] It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element, or intervening elements may also be present. Conversely, when an element is referred to as being "directly on" another element, there are no intervening elements. The term "on..." or "above..." means disposed above or below an object portion, and does not necessarily mean disposed above an object portion based on the direction of gravity.

[0037] It should be understood that the terms "include", "comprising", "having" or "configuration" indicate the presence of the features, quantities, steps, operations, constituent elements, components or combinations thereof described in the specification, but do not exclude the possibility of pre-existing or adding one or more other features, quantities, steps, operations, constituent elements, components or combinations thereof. Unless explicitly described to the contrary, the word "include" and variations such as "include" or "contain" will be understood to imply the inclusion of the elements but not the exclusion of any other elements.

[0038] The expression “in a plan view” or “on a plane” means observing an object portion from above, and the expression “in a cross-sectional view” or “on a cross section” means observing a cross section formed by vertically cutting the object portion from the side.

[0039] Throughout the specification, when it is described that a component is “connected” to another component, the component may be “directly connected” to the other component, may be “connected” to the other component through a third component, or may be physically or electrically connected to the other component, and may be expressed in different ways depending on the arrangement or function, but various parts that are basically integrated into one body may be connected to each other.

[0040] Figure 1 A perspective view showing a coil electronic component according to an embodiment, Figure 2 Shown along Figure 1 A cross-sectional view taken along line II-II'.

[0041] Reference Figure 1 and Figure 2 , the coil electronic component 1000 may include a body 100 , a coil 200 , a first external electrode 300 , and a second external electrode 400 .

[0042] The body 100 may have a substantially hexahedral shape, but the present embodiment is not limited thereto. Due to shrinkage during sintering, the body 100 may have a substantially hexahedral shape, although not a perfect hexahedral shape. For example, the body 100 may have a substantially rectangular parallelepiped shape, but the corners or vertex portions may have a rounded shape.

[0043] In this embodiment, for the sake of convenience of explanation, the two surfaces opposite to each other in the length direction (L-axis direction) are defined as the first surface S1 and the second surface S2, the two surfaces opposite to each other in the width direction (W-axis direction) are defined as the third surface S3 and the fourth surface S4, and the two surfaces opposite to each other in the thickness direction (T-axis direction) are defined as the fifth surface S5 and the sixth surface S6.

[0044] The length of the coil electronic component 1000 may refer to the maximum value of the lengths of a plurality of line segments that are connected to the two outermost boundary lines that are opposite to each other in the length direction (L axis direction) of the coil electronic component 1000 shown in the above cross-sectional photo and are respectively parallel to the length direction (L axis direction), based on an optical microscope or scanning electron microscope (SEM) photograph of a cross section in the length direction (L axis direction)-thickness direction (T axis direction) taken at the center in the width direction (W axis direction) of the coil electronic component 1000. Alternatively, the length of the coil electronic component 1000 may refer to the minimum value of the lengths of a plurality of line segments that are connected to the two outermost boundary lines that are opposite to each other in the length direction (L axis direction) of the coil electronic component 1000 shown in the above cross-sectional photo and are respectively parallel to the length direction (L axis direction). Optionally, the length of the coil electronic component 1000 may refer to the arithmetic mean of the lengths of at least two of the multiple line segments connecting the two outermost boundary lines opposite to each other in the length direction (L-axis direction) of the coil electronic component 1000 shown in the above-mentioned cross-sectional photograph and respectively parallel to the length direction (L-axis direction).

[0045] The thickness of the coil electronic component 1000 may refer to the maximum value of the lengths of multiple line segments that are connected to the two outermost boundary lines that are opposite to each other in the thickness direction (T-axis direction) of the coil electronic component 1000 shown in the above cross-sectional photo and are respectively parallel to the thickness direction (T-axis direction), based on an optical microscope or scanning electron microscope (SEM) photograph of a cross section in the length direction (L-axis direction)-thickness direction (T-axis direction) taken at the center in the width direction (W-axis direction) of the coil electronic component 1000. Optionally, the thickness of the coil electronic component 1000 may refer to the minimum value of the lengths of multiple line segments that are connected to the two outermost boundary lines that are opposite to each other in the thickness direction (T-axis direction) of the coil electronic component 1000 shown in the above cross-sectional photo and are respectively parallel to the thickness direction (T-axis direction). Optionally, the thickness of the coil electronic component 1000 may refer to the arithmetic mean of the lengths of at least two of the multiple line segments connecting the two outermost boundary lines opposite to each other in the thickness direction (T-axis direction) of the coil electronic component 1000 shown in the above-mentioned cross-sectional photograph and respectively parallel to the thickness direction (T-axis direction).

[0046] The width of the coil electronic component 1000 may refer to the maximum value of the lengths of multiple line segments connecting the two outermost boundary lines opposite to each other in the width direction (W-axis direction) of the coil electronic component 1000 shown in the above cross-sectional photo and parallel to the width direction (W-axis direction), based on an optical microscope or scanning electron microscope (SEM) photograph of a cross section in the length direction (L-axis direction)-width direction (W-axis direction) taken at the center in the thickness direction (T-axis direction) of the coil electronic component 1000. Optionally, the width of the coil electronic component 1000 may refer to the minimum value of the lengths of multiple line segments connecting the two outermost boundary lines opposite to each other in the width direction (W-axis direction) of the coil electronic component 1000 shown in the above cross-sectional photo and parallel to the width direction (W-axis direction). Optionally, the width of the coil electronic component 1000 may refer to the arithmetic mean of the lengths of at least two of the multiple line segments connecting the two outermost boundary lines opposite to each other in the width direction (W-axis direction) of the coil electronic component 1000 shown in the above-mentioned cross-sectional photograph and respectively parallel to the width direction (W-axis direction).

[0047] In addition, each of the length, width, and thickness of the coil electronic component 1000 can be measured using a micrometer measurement method. In the micrometer measurement method, a micrometer that provides metrological repeatability and reproducibility (gauge R&R) is set to a zero point, the coil electronic component 1000 according to the present embodiment is inserted between the tips of the micrometer, and the measuring rod of the micrometer is rotated for measurement. In addition, when the length of the coil electronic component 1000 is measured by the micrometer measurement method, the length of the coil electronic component 1000 may represent a value measured once, or may represent an arithmetic mean of values ​​measured multiple times. This may also apply to the measurement of the width and thickness of the coil electronic component 1000.

[0048] The body 100 constitutes the appearance of the coil electronic component 1000 and has a space in which a magnetic circuit, which is a path through which magnetic flux induced by the coil 200 passes when current is applied to the coil 200 through the first and second external electrodes 300 and 400 , is formed.

[0049] The body 100 surrounds and encloses the coil 200, and includes a magnetic material. The body 100 includes magnetic particles, and an insulating material may be interposed between the magnetic particles.

[0050] The magnetic material may include first metal magnetic particles, second metal magnetic particles having a particle size larger than that of the first metal magnetic particles, and third metal magnetic particles having a particle size larger than that of the second metal magnetic particles. 50 The average particle size D of the second metal magnetic particles may be greater than or equal to 0.1 μm and less than or equal to 0.2 μm. 50The average particle size D of the third metal magnetic particles may be greater than or equal to 1 μm and less than or equal to 2 μm. 50 It may be greater than or equal to 25 μm and less than or equal to 30 μm.

[0051] The magnetic particles may be ferrite particles or metal magnetic particles exhibiting magnetic properties.

[0052] The ferrite particles may include, for example, at least one of spinel ferrites (such as Mg-Zn-based ferrites, Mn-Zn-based ferrites, Mn-Mg-based ferrites, Cu-Zn-based ferrites, Mg-Mn-Sr-based ferrites, Ni-Zn-based ferrites), hexagonal ferrites (such as Ba-Zn-based ferrites, Ba-Mg-based ferrites, Ba-Ni-based ferrites, Ba-Co-based ferrites, Ba-Ni-Co-based ferrites), garnet-type ferrites (such as Y-based ferrites) and Li-based ferrites.

[0053] The metal magnetic particles may include two or more particles having different components, and may include one or more selected from the group consisting of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu), and nickel (Ni). For example, the metal magnetic particles may include pure iron, Fe-Si-based alloys, Fe-Si-Al-based alloys, Fe-Ni-based alloys, Fe-Ni-Mo-based alloys, Fe-Ni-Mo-Cu-based alloys, Fe-Co-based alloys, Fe-Ni-Co-based alloys, Fe-Cr-based alloys, Fe-Cr-Si-based alloys, Fe-Si-Cu-Nb-based alloys, Fe-Ni-Cr-based alloys, and Fe-Cr-Al-based alloys. Here, different components of the metal magnetic particles may mean different contents.

[0054] The metal magnetic particles may be amorphous or crystalline. For example, the metal magnetic particles may be Fe-Si-B-Cr based amorphous alloy, but the present embodiment is not limited thereto. The metal magnetic particles may have an average particle size of about 0.1 μm to about 30 μm, but is not limited thereto. In this specification, the average particle size may refer to the particle size in terms of D 90 , D 50 The particle size distribution is expressed as . The particle size distribution is well known to those skilled in the art and is an indicator of what proportion of particles of what size (particle diameter) are included in the particle group to be measured. 50 (The particle size corresponding to 50% of the cumulative volume of the particle size distribution) refers to the average particle size.

[0055] The metal magnetic particles may be two or more types of different metal magnetic particles. Here, different types of metal magnetic particles means that the metal magnetic particles are different from each other in at least one of average particle size, composition, composition ratio, crystallinity and shape.

[0056] The insulating material may include epoxy resin, polyimide, liquid crystal polymer, etc., alone or in combination, but is not limited thereto.

[0057] The body 100 includes a base 101 and a cover 103. The base 101 may include a protrusion 105.

[0058] The base 101 may include a front surface 101A and a rear surface 101B opposite to each other in the width direction (W axis direction) and a lower surface 101C and an upper surface 101D opposite to each other in the thickness direction (T axis direction). The lower surface 101C of the base 101 may include a sixth surface S6 of the body 100.

[0059] The protrusion 105 may be disposed on the upper surface 101D of the base 101, and the protrusion 105 may be integrated with the base 101. The shape of the protrusion 105 observed in the thickness direction (T-axis direction) is not particularly limited, and may be circular, elliptical, triangular, rectangular, or any other shape. The protrusion 105 may have various known shapes that can be accommodated in the hollow space of the coil 200. That is, the protrusion 105 may be the core of the coil 200.

[0060] The base 101 may be formed by filling a mold with a magnetic material. The base 101 may also be formed by filling a mold with a composite material including a magnetic material and an insulating resin.

[0061] The cover 103 may be disposed on the upper side of the base 101, and may surround all surfaces of the base 101 except the lower surface 101C. Therefore, the cover 103 may include the first surface S1, the second surface S2, the third surface S3, the fourth surface S4, and the fifth surface S5 of the body 100, and the base 101 and the cover 103 may together include the sixth surface S6 of the body 100. At least one of the base 101 and the cover 103 may include a magnetic material, and may include magnetic particles and an insulating resin interposed between the magnetic particles.

[0062] The method of forming the body 100 is not particularly limited. For example, the body 100 may be formed by placing magnetic sheets on the upper and lower portions of the coil 200, and then pressing and curing the magnetic sheets. In another example, magnetic particles may be filled to surround the coil 200 and portions of the first and second external electrodes 300 and 400, and then a pressing and curing process is performed through a mold to form the body 100.

[0063] The coil 200 is embedded in the body 100, exhibiting characteristics of the coil electronic component 1000. For example, when the coil electronic component 1000 of the present embodiment is used as a power inductor and current is applied to the coil 200, the coil 200 can stabilize power of an electronic device by storing energy as a magnetic field.

[0064] The coil 200 may have a shape in which a metal (eg, copper (Cu) or silver (Ag)) wire coated with an insulating material is spirally wound. That is, the coil 200 may be a wound coil. The coil 200 is not limited to a single wire and may include a twisted wire or two or more wires.

[0065] The coil 200 may be an air coil wound around the protrusion 105 of the base 101. The coil 200 may be a circular coil, but is not limited thereto. For example, the coil 200 may be various well-known coils, such as a rectangular coil.

[0066] The coil 200 includes a first portion 201 and a second portion 203 connected to the first portion 201 .

[0067] The first portion 201 and the second portion 203 may have a plurality of turns.

[0068] For example, the first portion 201 may have an outermost coil C1 and an innermost coil C2 sequentially from the outer surface toward the inside of the body 100. In addition, although not shown, at least one intermediate coil may be provided between the outermost coil C1 and the innermost coil C2.

[0069] Likewise, the second portion 203 may have an outermost coil C1' and an innermost coil C2' sequentially from the outer surface toward the inside of the body 100. In addition, although not shown, at least one intermediate coil may be provided between the outermost coil C1' and the innermost coil C2'.

[0070] The insulating film IF may be provided along the surface of each of the plurality of turns of the coil 200. The insulating film IF is used to protect and insulate the plurality of turns of the coil 200, and may include a known insulating material such as polyparaxylene. Any insulating material may be used for the insulating film IF, and there is no particular limitation. For example, the insulating film IF may be a polyurethane resin, a polyester resin, an epoxy resin, or a polyamide-imide resin. The insulating film IF may be formed by a method such as vapor deposition, but is not limited thereto.

[0071] The cross-sectional shape of the coil 200 will now be described in detail.

[0072] Reference Figure 2 , the cross-sectional shape of each wire of the coil 200 is a triangle. The triangle is not limited to a specific shape of a triangle, and may have various shapes such as an isosceles triangle or an equilateral triangle.

[0073] The cross-sectional shape of the conductive wire of the first portion 201 of the coil 200 may be complementary to the cross-sectional shape of the conductive wire of the second portion 203 .

[0074] For example, the wire of the first part 201 may be arranged so that one side of the triangle may face the sixth surface S6 of the body 100, and the wire of the second part 203 may be arranged so that one side of the triangle may face the fifth surface S5 of the body 100. Therefore, the triangular cross-section of the wire of the first part 201 and the inverted triangular cross-section of the wire of the second part 203 may be alternately arranged along the length direction (L-axis direction). Except for the outermost and innermost parts of the coil 200, the wire of the first part 201 and the wire of the second part 203 may contact each other on two sides, thereby achieving structural stability. Therefore, in the manufacturing process of the inductor, when the sheet of magnetic material is pressed on the coil 200, deformation or misalignment of the coil 200 can be prevented.

[0075] On the contrary, if the cross-sectional shape of the wires of the first part 201 and the second part 203 of the coil 200 is rectangular, and the first part 201 and the second part 203 are stacked in the thickness direction (T-axis direction), the wire of the first part 201 and the wire of the second part 203 may contact each other on one side. This structure is more unstable than the case where the wires of the triangular cross-sectional shape contact each other on two sides. Therefore, in the manufacturing process of the inductor, the possibility of deformation or misalignment of the coil is high.

[0076] The coil 200 may include a winding portion 205 and a lead-out portion 207 .

[0077] The winding portion 205 is a portion where the conductive wire of the coil 200 includes at least one turn.

[0078] The lead portion 207 may extend from each end of the winding portion 205 and may be exposed from the sixth surface S6 of the body 100. For example, the lead portion 207 may be welded to each end of the winding portion 205, and the cross-sectional shape of the lead portion 207 may be the same as or different from the cross-sectional shape of the wire of the coil 200.

[0079] The lead portion 207 includes a first lead portion 208 and a second lead portion 209. The first lead portion 208 may extend from one end of the winding portion 205 and may be exposed from the sixth surface S6 of the body 100, and the second lead portion 209 may extend from the other end of the winding portion 205 and may be exposed from the sixth surface S6 of the body 100.

[0080] In addition, portions of the first and second lead-out portions 208 and 209 exposed from the sixth surface S6 of the body 100 may be spaced apart from each other in the length direction (L-axis direction), but are not limited thereto.

[0081] The first lead portion 208 and the second lead portion 209 are both extended from the winding portion 205. For example, the first lead portion 208 may extend from the rear surface 101B side of the base 101 through the front surface 101A toward the lower surface 101C, and may be connected to the first external electrode 300. The second lead portion 209 may extend from the rear surface 101B side of the base 101 through the front surface 101A toward the lower surface 101C, and may be connected to the second external electrode 400. However, the present embodiment is not limited thereto, and the first lead portion and the second lead portion may extend in various directions.

[0082] In addition, the insulating film IF may be disposed on the first lead-out portion 208 except the portion connected to the first external electrode 300 , and the insulating film IF may be disposed on the second lead-out portion 209 except the portion connected to the second external electrode 400 .

[0083] The base 101 may be provided with a first groove 107 and a second groove 108 .

[0084] The first groove 107 and the second groove 108 may be formed across both sides of the front surface 101A and the lower surface 101C of the base 101 in the length direction (L-axis direction). The first groove 107 and the second groove 108 may extend to the rear surface 101B of the base 101.

[0085] The first groove 107 and the second groove 108 may guide the first lead-out portion 208 and the second lead-out portion 209 of the coil 200. For example, the first lead-out portion 208 may extend along the first groove 107 and may be connected to the first external electrode 300, and the second lead-out portion 209 may extend along the second groove 108 and may be connected to the second external electrode 400. However, the present embodiment is not limited thereto, and the first lead-out portion and the second lead-out portion may extend in various directions.

[0086] The first groove 107 and the second groove 108 may have a depth and a width respectively accommodating the first lead-out portion 208 and the second lead-out portion 209. For example, the depth of the first groove 107 and the second groove 108 may be less than or equal to the thickness of the first lead-out portion 208 and the second lead-out portion 209, and the width of the first groove 107 and the second groove 108 may be greater than or equal to the width of the first lead-out portion 208 and the second lead-out portion 209.

[0087] However, the groove is not necessarily formed on the base, and the groove may not exist depending on a method of forming the base or a method of arranging the lead-out portion.

[0088] The cross-sectional shape of the first lead-out portion 208 and the second lead-out portion 209 perpendicular to the extending direction may be a rectangle, but is not limited thereto, and may also be various shapes such as a circle, an ellipse, or a triangle.

[0089] The first and second external electrodes 300 and 400 are disposed outside the body 100 and are electrically connected to the coil 200 .

[0090] The first external electrode 300 is disposed on the sixth surface S6 of the body 100 , and the first lead-out portion 208 of the coil 200 is exposed from the sixth surface S6 of the body 100 and connected to the first external electrode 300 .

[0091] The second external electrode 400 is disposed on the sixth surface S6 of the body 100 , and the second lead-out portion 209 of the coil 200 is exposed from the sixth surface S6 of the body 100 and connected to the second external electrode 400 .

[0092] The first and second external electrodes 300 and 400 may include a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), chromium (Cr), titanium (Ti), alloys thereof, etc., but are not limited thereto.

[0093] The first and second external electrodes 300 and 400 may include a plurality of metal layers formed by plating a conductive metal.

[0094] The first external electrode 300 may include a first metal layer 301 , a second metal layer 302 , and a third metal layer 303 .

[0095] Reference Figure 2 As shown in the left circle in FIG. 1 , the first metal layer 301 may be a plating layer that contacts the first lead-out portion 208 of the coil 200 and the outer surface of the body 100, and may include copper (Cu). The second metal layer 302 may be a plating layer that covers the first metal layer 301, and may include nickel (Ni). The third metal layer 303 may be a plating layer that covers the second metal layer 302, and may include tin (Sn). However, the present embodiment is not limited to a three-layer structure, and a two-layer structure in which only one plating layer is added on the first metal layer 301 is also feasible.

[0096] The second external electrode 400 may include a first metal layer 401 , a second metal layer 402 , and a third metal layer 403 .

[0097] Reference Figure 2 In the right circle in FIG. 1 , the first metal layer 401 may be a plating layer in contact with the second lead-out portion 209 of the coil 200 and the outer surface of the body 100, and may include copper (Cu). The second metal layer 402 may be a plating layer covering the first metal layer 401, and may include nickel (Ni). The third metal layer 403 may be a plating layer covering the second metal layer 402, and may include tin (Sn). However, the present embodiment is not limited to a three-layer structure, and a two-layer structure in which only one plating layer is added on the first metal layer 401 is also feasible.

[0098] As described above, the first external electrode 300 and the second external electrode 400 may include nickel (Ni), copper (Cu), palladium (Pd), gold (Au), or an alloy thereof, and may include a plurality of plating layers. For example, the first external electrode 300 and the second external electrode 400 may be a nickel (Ni) layer, a copper (Cu) layer, a nickel (Ni) layer and a copper (Cu) layer, a palladium (Pd) layer and a nickel (Ni) layer, a palladium (Pd) layer and a nickel (Ni) layer and a copper (Cu) layer, and a combination of a copper (Cu) layer, a nickel (Ni) layer, and a copper (Cu) layer.

[0099] In some embodiments, the outermost layer may include tin (Sn). The tin plating layer has a relatively low melting point, and thus may improve ease of substrate mounting of the first and second external electrodes 300 and 400 .

[0100] Generally, the tin-plated layer may be bonded to the electrode pad on the substrate by a solder including a tin (Sn)-copper (Cu)-silver (Ag) alloy paste. That is, the tin-plated layer may be melted and bonded with the solder in a heat treatment (reflow) process.

[0101] In addition, the first and second external electrodes 300 and 400 may be entirely or partially embedded in the base 101 , or may protrude from the lower surface 101C of the base 101 in the thickness direction (T-axis direction).

[0102] In the body 100 of the coil electronic component 1000, the insulating layer 900 may be provided in a region of the body 100 except for a region where the first external electrode 300 and the second external electrode 400 are provided. Alternatively, the insulating layer may exist in a region between a portion where the first lead-out portion 208 of the coil 200 is exposed and a portion where the second lead-out portion 209 is exposed on the sixth surface S6 of the body 100. In this case, the first external electrode 300 and the second external electrode 400 may cover a portion of the insulating layer.

[0103] As described above, the insulating layer 900 may be disposed on at least a portion of the first, second, third, fourth, fifth, and sixth surfaces S1, S2, S3, S4, S5, and S6 of the body 100 to prevent electrical shorts between other electronic components and the external electrodes 300 and 400.

[0104] When the external electrodes 300 and 400 are formed by electroplating, the insulating layer 900 may be used as a plating resist, but is not limited thereto.

[0105] Figure 3A , Figure 3B , Figure 3C and Figure 3D Various cross-sectional shapes of the wire of the coil are shown, and the present embodiment includes all shapes.

[0106] Reference Figure 3A, the cross-section of the wire of the coil has an isosceles triangle shape with a thickness t greater than a width w.

[0107] Reference Figure 3B , the cross-section of the wire of the coil has an isosceles triangle shape with a thickness t smaller than a width w.

[0108] Reference Figure 3C , the cross-section of the wire of the coil has an equilateral triangle shape with rounded vertices.

[0109] Reference Figure 3D , the cross-section of the wire of the coil has a triangular shape with rounded vertices and at least one side being concave or convex.

[0110] Figure 4 A cross-sectional view of a coil electronics assembly according to another embodiment is shown.

[0111] Reference Figure 4 The coil electronic component 2000 includes a body 100 , a coil 220 , a first external electrode 300 , and a second external electrode 400 .

[0112] The coil 220 includes a first portion 221 and a second portion 223, and the second portion 223 is connected to the first portion 221. The cross-sectional shape of the wire of the first portion 221 and the cross-sectional shape of the wire of the second portion 223 are both triangular shapes, and the first portion 221 and the second portion 223 are provided complementarily to each other.

[0113] For example, the wire of the first part 221 may be arranged so that one side of the triangle faces the sixth surface S6 of the body 100, and the wire of the second part 223 may be arranged so that one side of the triangle faces the fifth surface S5 of the body 100. Therefore, the triangular cross-section of the wire of the first part 201 and the inverted triangular cross-section of the wire of the second part 203 may be arranged alternately along the length direction (L-axis direction). In addition, the wire of the second part 223 is not arranged between the wires 221A and 221B of the two outermost turns of the first part 221 of the coil 220. However, the outermost wire 221A may be inclined toward the inner wire 221B so that the wires 221A and 221B may contact each other to achieve a stable structure.

[0114] No wire of the first portion 221 is disposed between the wires 223A and 223B of the two outermost turns of the second portion 223 of the coil 220. However, the outermost wire 223A may be inclined toward the inner wire 223B so that the wires 223A and 223B may contact each other to achieve a stable structure.

[0115] Each of the two outermost turns of the wires 221A and 221B in the first portion 221 has a triangular cross-section, and each of the two outermost turns of the wires 223A and 223B in the second portion 223 has a triangular cross-section that is inverted relative to the triangular cross-section of the two outermost turns of the wires 221A and 221B in the first portion 221.

[0116] In addition to the above components, the remaining components are Figure 1 The components of the coil electronic assembly shown are the same, so repeated descriptions thereof will be omitted.

[0117] Figure 5 A perspective view showing a coil electronics assembly according to another embodiment, Figure 6 Show Figure 5 A bottom perspective view of the coil electronics assembly in FIG. 1 , and Figure 7 Shown along Figure 5 A cross-sectional view taken along line VII-VII'.

[0118] Reference Figure 5 , Figure 6 and Figure 7 The coil electronic component 3000 may include a body 100 , a first coil 1200 , a second coil 1300 , a first external electrode 500 , a second external electrode 600 , a third external electrode 700 , and a fourth external electrode 800 .

[0119] The first coil 1200 and the second coil 1300 are disposed inside the body 100, exhibiting characteristics of a coil electronic component. For example, when the coil electronic component 3000 of the present embodiment is used as a power inductor and current is applied to the first coil 1200 and the second coil 1300, the coils 1200 and 1300 can be used to stabilize the power of the electronic device by storing energy as a magnetic field.

[0120] The first coil 1200 and the second coil 1300 may be spaced apart from each other in the thickness direction (T-axis direction), and may be wound together around the core 102 .

[0121] The first coil 1200 and the second coil 1300 may be magnetically coupled to each other to include a coupled inductor structure. The first coil 1200 and the second coil 1300 may have a plurality of turns, and the number of turns of the first coil 1200 and the number of turns of the second coil 1300 may be the same or different.

[0122] The first coil 1200 and the second coil 1300 may be edgewise wound coils.

[0123] For example, the first coil 1200 may have an outermost coil C1 and an innermost coil C2 sequentially from the fifth surface S5 to the sixth surface S6 of the coil electronic component 3000. In addition, although not shown, at least one intermediate coil may be provided between the outermost coil C1 and the innermost coil C2.

[0124] Similarly, the second coil 1300 may have an outermost coil C1' and an innermost coil C2' sequentially from the sixth surface S6 to the fifth surface S5 of the coil electronic component 3000. In addition, although not shown, at least one intermediate coil may be provided between the outermost coil C1' and the innermost coil C2'.

[0125] An insulating film IF may be provided along the surface of each of the plurality of turns of the first coil 1200 and the second coil 1300. The insulating film IF is used to protect and insulate the plurality of turns of the first coil 1200 and the second coil 1300, and may include a known insulating material such as polyparaxylene. Any insulating material may be used for the insulating film IF, and there is no particular limitation. For example, the insulating film IF may be a polyurethane resin, a polyester resin, an epoxy resin, or a polyamide-imide resin. The insulating film IF may be formed by a method such as vapor deposition, but is not limited thereto.

[0126] The first coil 1200 includes a first portion 1210 and a second portion 1220, and the second portion 1220 is connected to the first portion 1210. The second coil 1300 includes a first portion 1310 and a second portion 1320, and the second portion 1320 is connected to the first portion 1310.

[0127] The cross-sectional shape of each conductive wire of the first coil 1200 and the second coil 1300 is a triangle. The triangle is not limited to a specific shape, and may have various shapes such as an isosceles triangle or an equilateral triangle.

[0128] The cross-sectional shape of the conductive wire of the first portion 1210 of the first coil 1200 and the cross-sectional shape of the conductive wire of the second portion 1220 may be complementary.

[0129] For example, the wires of the first portion 1210 are arranged so that one side of the triangle can face the core 102, and the wires of the second portion 1220 are arranged so that one side of the triangle can face the outer surface (eg, Figure 7The first surface S1 or the second surface S2 in the first coil 1200). Therefore, the triangular cross-section of the wire of the first part 1210 and the inverted triangular cross-section of the wire of the second part 1220 may be alternately arranged along the thickness direction (T-axis direction). Except for the outermost part and the innermost part of the first coil 1200, the wire of the first part 1210 and the wire of the second part 1220 may contact each other on two sides, thereby realizing a stable structure. In particular, the first part 1210 and the second part 1220 may be in close contact during the winding process.

[0130] The wire of the first portion 1310 of the second coil 1300 may be arranged so that one side of the triangle may face the core 102, and the wire of the second portion 1320 may be arranged so that one side of the triangle may face the outer surface (eg, Figure 7 The first surface S1 or the second surface S2 in the second coil 1300). Therefore, the triangular cross-section of the wire of the first part 1310 and the inverted triangular cross-section of the wire of the second part 1320 may be alternately arranged along the thickness direction (T-axis direction). Except for the outermost part and the innermost part of the second coil 1300, the wire of the first part 1310 and the wire of the second part 1320 may contact each other on two sides, thereby realizing a stable structure. In particular, the first part 1310 and the second part 1320 may be in close contact during the winding process.

[0131] The first and second external electrodes 500 and 600 are disposed outside the body 100 and are electrically connected to the first coil 1200 .

[0132] The first external electrode 500 is disposed on the sixth surface S6 of the body 100 , and the first lead-out portion 1208 of the first coil 1200 is exposed from the sixth surface S6 of the body 100 and connected to the first external electrode 500 .

[0133] The second external electrode 600 is disposed on the sixth surface S6 of the body 100 , and the second lead-out portion 1209 of the first coil 1200 is exposed from the sixth surface S6 of the body 100 and connected to the second external electrode 600 .

[0134] The third and fourth external electrodes 700 and 800 are disposed outside the body 100 and are electrically connected to the second coil 1300 .

[0135] The third external electrode 700 is disposed on the sixth surface S6 of the body 100 , and the first lead-out portion 1308 of the second coil 1300 is exposed from the sixth surface S6 of the body 100 and connected to the third external electrode 700 .

[0136] The fourth external electrode 800 is disposed on the sixth surface S6 of the body 100 , and the second lead-out portion 1309 of the second coil 1300 is exposed from the sixth surface S6 of the body 100 and connected to the fourth external electrode 800 .

[0137] Reference Figure 5 As shown in the right circle in FIG. 5 , the first external electrode 500 may include a first metal layer 501 , a second metal layer 502 and a third metal layer 503 .

[0138] The first metal layer 501 may be a plating layer in contact with the first lead-out portion 1208 of the first coil 1200 and the outer surface of the body 100, and may include copper (Cu). The second metal layer 502 may be a plating layer covering the first metal layer 501, and may include nickel (Ni). The third metal layer 503 may be a plating layer covering the second metal layer 502, and may include tin (Sn). However, the present embodiment is not limited to such a three-layer structure, and a two-layer structure in which only one plating layer is added to the first metal layer 501 is also feasible.

[0139] Reference Figure 5 As shown in the left circle in FIG. 1 , the second external electrode 600 may include a first metal layer 601 , a second metal layer 602 and a third metal layer 603 .

[0140] The first metal layer 601 may be a plating layer in contact with the second lead-out portion 1209 of the first coil 1200 and the outer surface of the body 100, and may include copper (Cu). The second metal layer 602 may be a plating layer covering the first metal layer 601, and may include nickel (Ni). The third metal layer 603 may be a plating layer covering the second metal layer 602, and may include tin (Sn). However, the present embodiment is not limited to such a three-layer structure, and a two-layer structure in which only one plating layer is added to the first metal layer 601 is also feasible.

[0141] As described above, the first external electrode 500 and the second external electrode 600 may include nickel (Ni), copper (Cu), palladium (Pd), gold (Au), or alloys thereof, and may include a plurality of plating layers. For example, the first external electrode 500 and the second external electrode 600 may be a nickel (Ni) layer, a copper (Cu) layer, a nickel (Ni) layer and a copper (Cu) layer, a palladium (Pd) layer and a nickel (Ni) layer, a palladium (Pd) layer and a nickel (Ni) layer and a copper (Cu) layer, and a combination of a copper (Cu) layer, a nickel (Ni) layer, and a copper (Cu) layer.

[0142] In some embodiments, the outermost layer may include tin (Sn). The tin plating layer has a relatively low melting point, and thus may improve ease of substrate mounting of the first and second external electrodes 500 and 600 .

[0143] Generally, the tin-plated layer may be bonded to the electrode pad on the substrate by a solder including a tin (Sn)-copper (Cu)-silver (Ag) alloy paste. That is, the tin-plated layer may be melted and bonded with the solder in a heat treatment (reflow) process.

[0144] The structures and components of the third and fourth external electrodes 700 and 800 are the same as those of the above-described first and second external electrodes 500 and 600 , and thus a repeated description thereof will be omitted.

[0145] In the body 100 of the coil electronic component 3000 according to the present embodiment, the insulating layer 900 may be provided in a region other than the region where the first external electrode 500, the second external electrode 600, the third external electrode 700, and the fourth external electrode 800 are provided. Alternatively, the insulating layer may exist in a region between a portion where the first lead-out portion 1208 of the first coil 1200 is exposed, a portion where the second lead-out portion 1209 of the first coil 1200 is exposed, a portion where the first lead-out portion 1308 of the second coil 1300 is exposed, and a portion where the second lead-out portion 1309 of the second coil 1300 is exposed on the sixth surface S6 of the body 100. In this case, the first external electrode 500, the second external electrode 600, the third external electrode 700, and the fourth external electrode 800 may cover a portion of the insulating layer.

[0146] As described above, the insulating layer 900 may be disposed on at least a portion of the first, second, third, fourth, fifth, and sixth surfaces S1, S2, S3, S4, S5, and S6 of the body 100 to prevent electrical short circuits between other electronic components and the external electrodes 500, 600, 700, and 800.

[0147] When the external electrodes 500 , 600 , 700 , 800 are formed by electroplating, the insulating layer 900 may be used as a plating resist, but is not limited thereto.

[0148] In addition to the above components, the remaining components are Figure 1 The remaining components of the coil electronic assembly shown are the same or correspond, so their repeated description will be omitted.

[0149] While the present disclosure has been described in connection with what are presently considered to be practical embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments, but on the contrary is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A coil electronic assembly, comprising: a body including a first surface and a second surface opposite to each other and including a magnetic material; a coil, comprising a first lead-out portion, a second lead-out portion, and at least one turn of a wire, wherein a cross-sectional shape of the wire comprises a triangular shape, and at least a portion of the coil is embedded in the body; a first external electrode connected to the first lead-out portion; and A second external electrode is connected to the second lead portion.

2. The coil electronic component according to claim 1, wherein: The coil includes a first portion and a second portion, the first portion including at least one turn of the wire, the second portion being connected to the first portion and including at least one turn of the wire, The wire in the first portion is arranged so that one side of a triangular cross-section of the wire in the first portion faces the first surface, and The conductive line in the second portion is arranged such that one side of a triangular cross-section of the conductive line in the second portion faces the second surface.

3. The coil electronic component according to claim 2, wherein: The triangular cross-sections of the wires in the first portion and the triangular cross-sections of the wires in the second portion are alternately arranged such that the triangular cross-sections of the wires in the second portion are inverted relative to the triangular cross-sections of the wires in the first portion.

4. The coil electronic component according to claim 3, wherein: Each of the two outermost turns of the wire in the first portion has the triangular cross-section, and each of the two outermost turns of the wire in the second portion has the triangular cross-section inverted relative to the triangular cross-section of the two outermost turns of the wire in the first portion.

5. The coil electronic component according to claim 1, wherein: The magnetic material includes metal magnetic particles, and The metal magnetic particles include two or more particles having different compositions.

6. The coil electronic component according to claim 5, wherein: The metal magnetic particles include iron.

7. The coil electronic assembly according to claim 1, further comprising: An insulating film is provided on the surface of the conductive line.

8. The coil electronic assembly according to claim 1, further comprising: An insulating layer is disposed on a surface of the body except for a portion where the first lead portion is connected to the first external electrode and a portion where the second lead portion is connected to the second external electrode.

9. A coil electronic assembly comprising: a body, including a magnetic material; a first coil comprising at least one turn of a first conductive wire, at least a portion of the first coil being embedded in the body; as well as a second coil, spaced apart from the first coil, comprising at least one turn of a second conductive wire, at least a portion of the second coil being embedded in the body, The cross-sectional shape of the first conductive line includes a triangular shape, and the cross-sectional shape of the second conductive line includes a triangular shape.

10. The coil electronic component according to claim 9, wherein: The first coil and the second coil are edgewise wound coils.

11. The coil electronic component according to claim 10, wherein: The body includes a core around which the first coil and the second coil are commonly wound.

12. The coil electronic component according to claim 11, wherein: The first coil includes a first portion and a second portion, the first portion including at least one turn of the first conductor, the second portion being connected to the first portion and including at least one turn of the first conductor, The first wire in the first portion is arranged so that one side of a triangular cross-section of the first wire in the first portion faces the core, and The first conductive line in the second portion is arranged such that one side of a triangular cross-section of the first conductive line in the second portion faces an outer surface of the body.

13. The coil electronic component according to claim 11, wherein: The second coil includes a third portion and a fourth portion, the third portion including at least one turn of the second conductive wire, the fourth portion being connected to the third portion and including at least one turn of the second conductive wire, The second wire in the third portion is arranged so that one side of a triangular cross section of the second wire in the third portion faces the core, and The second conductive line in the fourth portion is disposed such that one side of a triangular cross-section of the second conductive line in the fourth portion faces an outer surface of the main body.

14. The coil electronic component according to claim 9, wherein: The number of turns of the first coil is the same as the number of turns of the second coil.

15. The coil electronic component according to claim 9, wherein: The number of turns of the first coil is different from the number of turns of the second coil.

16. A coil electronic assembly comprising: a body including a magnetic material; and at least one coil comprising a wire having a triangular cross-section, the at least one coil comprising a first portion and a second portion, the first portion comprising at least one turn of the wire, the second portion being connected to the first portion and comprising at least one turn of the wire, wherein the triangular cross-sections of the wires in the first part and the triangular cross-sections of the wires in the second part are arranged alternately, wherein the triangular cross-section of the wire in the second portion is inverted relative to the triangular cross-section of the wire in the first portion, and Wherein, at least a portion of the coil is embedded in the body.

17. The coil electronics assembly according to claim 16, further comprising: a first outer electrode; as well as The second outer electrode, Wherein, the at least one coil further comprises: a first lead portion connected to the first external electrode, and The second lead-out portion is connected to the second external electrode.

18. The coil electronic component according to claim 16, wherein: The at least one coil includes a first coil and a second coil, and the first coil and the second coil are edgewise wound coils.

19. The coil electronic component according to claim 16, wherein: The outermost wires of the two outermost turns of the wires in the first portion are inclined toward the inner wire, and the outermost wires of the two outermost turns of the wires in the second portion are inclined toward the inner wire.

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