Method for manufacturing metal strip, manufacturing apparatus, and component including at least portion of same metal strip

Abstract

A manufacturing method for crystallization of a metal strip, according to an embodiment, may comprise an operation of applying a current to a rod to heat the rod. The manufacturing method may comprise an operation of winding a metal strip formed from an amorphous metal alloy around the heated rod. The manufacturing method may comprise the operations of: causing crystallization of the amorphous metal alloy by using heat of the heated rod while the metal strip is wound around the heated rod; and magnetizing the amorphous metal alloy by using a magnetic field generated by the current. The manufacturing method may comprise an operation of taking out the metal strip wound around the heated rod.

Description

A method for manufacturing a metal strip, a manufacturing apparatus, and a part comprising at least a portion of the metal strip.

[0001] The present disclosure relates to a method for manufacturing a metal strip, an apparatus for manufacturing, and a part comprising at least a portion of the metal strip.

[0002] A nanocrystalline ribbon comprising a wound metal strip can be used in the manufacture of transformers, motors, inductors, choke coils, switching mode power supply circuitry, components for wireless power transmission, and / or electromagnetic shielding (or absorption) sheets. An amorphous metal (e.g., a material comprising particles smaller than 100 nanometers (nm)) and / or a metal in a glassy state (e.g., an amorphous ribbon with the metal wound thereon) can transition to a solid state and crystallize when cooled from a liquid state.

[0003] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0004] In one embodiment, a manufacturing method for crystallizing a metal strip may be provided. The manufacturing method may include the operation of heating the rod by applying an electric current to the rod. The manufacturing method may include the operation of winding a metal strip formed from an amorphous metal alloy onto the heated rod. The manufacturing method may include the operation of causing crystallization of the amorphous metal alloy using the heat of the heated rod while the metal strip is wound onto the heated rod, and magnetizing the amorphous metal alloy using a magnetic field generated by the electric current. The manufacturing method may include the operation of removing the metal strip wound onto the heated rod.

[0005] According to one embodiment, an electronic device may include an inductor. The inductor may include a core component formed from a metal strip. The metal strip may be manufactured by winding the metal strip, formed from an amorphous metal alloy, onto a rod. The rod may be heated based on receiving an electric current. The metal strip may be manufactured by using the heat of the heated rod to cause crystallization of the amorphous metal alloy while the metal strip is wound onto the rod, and by using a magnetic field generated by the electric current to magnetize the amorphous metal alloy. The metal strip may be manufactured by removing the metal strip wound onto the heated rod.

[0006] In one embodiment, an electronic device for magnetizing a metal strip formed from an amorphous metal alloy may be provided. The electronic device may include a rod comprising a heating wire. The electronic device may include a motor configured to rotate the rod. The electronic device may include a control circuit connected to the heating wire and the motor. The control circuit may be configured to heat the rod by applying a current to the heating wire of the rod. The control circuit may be configured to wind the metal strip around the rod so that the metal strip is magnetized by a magnetic field generated by the current while the current is applied to the heating wire.

[0007] FIG. 1 schematically illustrates a apparatus for a process for crystallization and magnetization of a metal strip according to one embodiment.

[0008] Figure 2 illustrates a flowchart for explaining a method for manufacturing a metal strip.

[0009] Figure 3 shows a block diagram of a manufacturing apparatus for manufacturing a metal strip.

[0010] FIGS. 4A, FIGS. 4B, FIGS. 4C, and FIGS. 4D schematically illustrate exemplary structures of a rod around which a metal strip is wound.

[0011] Figures 5a and 5b illustrate graphs for explaining the temperature gradient of a rod around which a metal strip is wound.

[0012] FIG. 6 illustrates a part comprising at least partially a metal strip manufactured by a manufacturing method according to one embodiment, and an example of an electronic device comprising said part.

[0013] FIG. 7 is a graph illustrating the saturation magnetic force and coercivity of a metal strip manufactured by a manufacturing method according to one embodiment.

[0014] Hereinafter, various embodiments of this document will be described with reference to the attached drawings.

[0015] The various embodiments of this document and the terms used therein are not intended to limit the technology described in this document to specific embodiments and should be understood to include various modifications, equivalents, and / or substitutions of such embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar components. A singular expression may include a plural expression unless the context clearly indicates otherwise. In this document, expressions such as “A or B,” “at least one of A and / or B,” “A, B or C,” or “at least one of A, B and / or C” may include all possible combinations of items listed together. Expressions such as “first,” “second,” “first,” or “second” may modify the components, regardless of order or importance, and are used only to distinguish one component from another and do not limit the components. When it is mentioned that a certain (e.g., 1st) component is “(functionally or telecommunicationally) connected” or “connected” to another (e.g., 2nd) component, said certain component may be directly connected to said other component or connected through another component (e.g., 3rd component).

[0016] As used in this document, the term “module” includes a unit composed of hardware and may be used interchangeably with terms such as, for example, component, and / or circuit. A module may be a component formed as a whole, or a minimum unit or part thereof that performs one or more functions. For example, a module may be composed of an application-specific integrated circuit (ASIC).

[0017] Within this document, when expressions regarding the positional relationship between one element and another (e.g., “on,” “at the top,” “below,” “at the bottom,” “next to”) are mentioned, it should be understood that, unless expressions such as “rightly” or “directly” are used, there may be one or more intervening elements between the two elements, and it should be noted that this does not limit the arrangement relationship between the two elements.

[0018] For example, when one element is referred to as being “above” another element, it may mean that one or more intermediate elements may exist between the two elements, in addition to the one element being attached to the other element, integrally combined, or integrally formed. For example, in the present disclosure, “B placed above A” may indicate “B placed over A”. For example, within this document, “B placed above A” may indicate “B facing A and spaced apart from A”. For example, “a first planar portion placed above the first housing part” may indicate “a first planar portion in contact with the first housing part”. For example, “a first planar portion placed above the first housing part” may indicate “a first planar portion facing the first housing part and spaced apart from the first housing part”.

[0019] For example, within this document, “B on A” may refer to “B disposed at least partially on one surface of A.” For example, within this document, “B on (or above) A” may refer to “B formed on A.” For example, within this document, “B on A” may refer to “B, a portion of which is formed on one surface of A, and the remainder of which is formed on another surface opposite to the said one surface of A.” For example, “B on A” may refer to “B, a portion of which is bonded to the outer surface of A, and the remainder of which is bonded to the interior of A.”

[0020] FIG. 1 schematically illustrates a process apparatus for crystallizing and magnetizing a metal strip (140) according to one embodiment. Referring to FIG. 1, a process for producing a metal strip (140) from an amorphous metal alloy (110) and winding the produced metal strip (140) to produce a nanocrystalline ribbon (145) (or wound metal strip) is schematically illustrated.

[0021] The present disclosure may relate to a heat treatment process (e.g., an annealing process) for causing crystallization (e.g., nanocrystallization) of an amorphous ribbon (e.g., amorphous metal alloy (110) and / or metal strip (140)) produced based on a rapid solidification process. The rapid solidification process may include a process of (rapidly) cooling a metal alloy (e.g., amorphous metal alloy (110)) in a molten (or liquid) state to produce a solid metal alloy (e.g., metal strip (140) and / or nanocrystalline ribbon (145)) having a specific crystal structure. The heat treatment process may include a process of altering the structure and / or properties of the metal alloy based on heating and / or cooling the metal alloy. The amorphous metal alloy (110) may include a metal alloy in an amorphous state. In the present disclosure, an amorphous state may be described as a state in which atoms contained in a metal alloy are arranged without any crystals (e.g., substantially no crystals are formed, or the size of the crystals is less than the nanometer scale). An exemplary rapid solidification process is described with reference to FIG. 2.

[0022] The amorphous metal alloy (110) in which the rapid solidification process is performed may be Fe-based, Fe-Ni-based, and / or Fe-Co-based. When the amorphous metal alloy (110) is crystallized, the magnetic properties of the amorphous metal alloy (110), including saturation magnetization, amorphous properties, permeability, and / or core loss (e.g., a core formed from the crystallized amorphous metal alloy (110)), may be determined according to the nanocrystalline properties. For example, a nanocrystallization process having improved magnetic properties may be required. The amorphous metal alloy (110) may include FINEMET (Fe73.5Cu1Nb3Si13.5B9), NANOPERM (Fe86Cu1Zr7B6), and / or NANOMAT (Fe83.3Si4B8P4Cu0.7). Referring to FIG. 1, a nanocrystalline ribbon (145) produced based on an exemplary rapid solidification process can be manufactured to have a ribbon shape to reduce eddy current losses at high frequencies.

[0023] Referring to FIG. 1, devices used in a process for crystallization and magnetization of a metal strip (140) are illustrated. The devices disclosed in FIG. 1 may be integrated into a single manufacturing device. An exemplary manufacturing device for performing a rapid solidification process is described with reference to FIG. 3. Referring to FIG. 1, a melting furnace (120) for melting an amorphous metal alloy (110) (or a solid amorphous ribbon formed from the amorphous metal alloy (110)) is illustrated. The amorphous metal alloy (110) melted in the melting furnace (120) may be transferred to a cooler (130) for cooling the amorphous metal alloy (110). The cooler (130) may include a rotating rod (or reel). The amorphous metal alloy (110) may be cooled based on contact with the rotating rod of the cooler (130). For example, depending on the rotation of the rod, a metal strip (140) (or metal sheet and / or metal film) solidified to a thin thickness (e.g., about 20 μm) may be formed on the rod.

[0024] A solid metal strip (140) produced in a cooler (130) can be crystallized based on an annealing process. For example, the metal strip (140) can be crystallized to have a nanocrystalline structure containing single domain particles of about 20 nm or less. The crystallized metal strip (140) may contain spherical (or square) crystals. For example, to increase the permeability of the metal strip (140) (e.g., 38,000 to 42,000 μ), a method of increasing the number (or ratio) of spherical crystals within the metal strip (140) may be required. For example, to increase the saturation magnetization of the metal strip (140), a method of increasing the degree of crystallinity of the metal strip (140) may be required.

[0025] The crystallization of the metal strip (140) may be related to the temperature at which the crystallization is performed. For example, the nanocrystalline structure of the metal strip (140) may be related to the temperature (e.g., keeping temperature) at which the annealing process for the metal strip (140) is performed, the time, and / or the rate of heat flow. The slower the rate of heat flow of the annealing process, and / or the lower the temperature of the annealing process, the slower the nucleation of nanocrystallines may occur, and the growth rate of the nanocrystallines may increase. As the growth rate of the nanocrystallines increases, a decrease in coercivity and / or loss of hysteresis may occur, and permeability may decrease. For example, to increase coercivity and / or permeability, a method of increasing the rate of heat flow may be required.

[0026] The present disclosure relates to a contact-type continuous magnetization annealing process that supports magnetization annealing based on a relatively fast heating rate. For example, a metal strip (140) may be in direct contact with a heat source. Annealing of the metal strip (140) may be performed by directly contacting the metal strip (140) with a heat source having a uniform temperature gradient (or temperature distribution) and / or a (relatively) high heating rate. Due to the uniform temperature gradient, nanocrystals within the metal strip (140) may be uniformly formed. The heat source may be configured to radiate a magnetic field so that magnetization and crystallization of the metal strip (140) occur simultaneously. Since the heat source is in direct contact with the metal strip (140), heat loss may be reduced or minimized. The magnetic field may be applied to the metal strip (140) to control the magnetic anisotropy of the metal strip (140). The crystal direction (or growth direction) of the nanocrystals and / or the direction of the magnetic domains within the metal strip (140) can be controlled or determined by the magnetic field. For example, the crystal direction and / or the direction of the magnetic domains can be determined by the magnetic field for the manufacture of a metal strip (140) having high saturation magnetization, low coercivity, and / or high permeability.

[0027] Referring to FIG. 1, a rod (160) is shown as a heat source in contact with a metal strip (140) for magnetization and / or crystallization of the metal strip (140). At least one guide part (191) may be configured to guide the movement of the metal strip (140) from the cooler (130) to the rod (160). The rod (160) may have the shape of a cylinder and / or a cylinder. The rod (160) may be connected to a rotor (e.g., a part configured to rotate within a motor). To radiate heat from the rod (160) to the metal strip (140), the rod (160) may include a heating wire (170). A tube (150) having a shape that wraps around the rod (160) may be provided together with the rod (160). The tube (150) may wrap around the rod (160) to guide the movement of the metal strip (140) in contact with the rod (160) and / or to block at least partially the heat emitted from the rod (160).

[0028] A heating wire (170) included in the rod (160) may be a resistive heating component configured to convert electrical energy into thermal energy. The heating wire (170) may include a conductor having a relatively high resistance value (e.g., an electrical resistance material including an oxidized metal material). When current is applied to the heating wire (170), the heating wire (170) may be heated (e.g., resistive heat). When current is applied to the heating wire (170), the heating wire (170) may emit resistive heat. The resistive heat may be transmitted at least partially to the metal strip (140) and may cause crystallization (e.g., nanocrystallization) of the metal strip (140). An exemplary structure of the heating wire (170) within the rod (160) is described with reference to FIGS. 4a through 4d.

[0029] When current is applied to the heating wire (170), the heating wire (170) can emit a magnetic field (180). In one embodiment where the heating wire (170) is formed within the rod (160) along the direction of the rod (160) (e.g., the longitudinal direction), when current is applied to the heating wire (170), a magnetic field (180) having a shape that wraps around the rod (160) can be formed according to Ampere's law because the current flows along said direction. The magnetic field (180) can cause magnetization of the metal strip (140). The magnetic field (180) can cause or control the growth of grains in the metal strip (140). The magnetic field (180) can cause the formation of magnetic domains within the metal strip (140). The magnetic field (180) may increase the anisotropy of the metal strip (140). Based on the increased anisotropy, the saturation magnetization and / or coercivity of the metal strip (140) (e.g., saturation magnetization and / or coercivity in a specific direction) may be improved. The magnetic field (180) and / or the temperature gradient of the rod (160) formed in the rod (160) while current is applied to the heating wire (170) are described with reference to FIG. 5a and / or FIG. 5b.

[0030] Referring to FIG. 1, a metal strip (140) wound around a rod (160) including a heating wire (170) can be moved along the curved surface of the rod (160) according to the rotation of the rod (160). The metal strip (140) wound around the rod (160) can be unwound, extracted, or unspooled from the rod (160). At least one guide part (192) may be provided or disposed to guide the movement of the metal strip (140) unwound from the rod (160). The unwound metal strip (140) can be wound along a rotation axis different from that of the rod (160). The wound metal strip (140) may be referred to as a nanocrystalline ribbon (145).

[0031] Referring to FIG. 1, a nanocrystalline ribbon (145) in a nanocrystalline state can be manufactured from an amorphous metal alloy (110) in an amorphous state by a continuous process (e.g., melting by a melting furnace (120), rapid solidification by a cooler (130), magnetization and / or crystallization on a rod (160). The continuous process increases the manufacturing speed, which can lead to mass production of the nanocrystalline ribbon (145). An example of a part manufactured based on the nanocrystalline ribbon (145) is described with reference to FIG. 6. By the continuous process, a nanocrystalline ribbon (145) having improved soft magnetic properties (e.g., high saturation magnetization, low coercivity, and / or high permeability) can be manufactured. The soft magnetic properties of the nanocrystalline ribbon (145) are described with reference to FIG. 7.

[0032] FIG. 2 illustrates a flowchart for explaining a method for manufacturing a metal strip. The metal strip of FIG. 2 may include the metal strip (140) of FIG. 1. Referring to FIG. 2, exemplary operations (210, 220, 230, 240, 250) included in a method for manufacturing crystallization of a metal strip are illustrated. The order in which the operations (210, 220, 230, 240) are performed is not limited to the order of FIG. 2. For example, at least two of the operations (210, 220, 230, 240) may be performed substantially simultaneously.

[0033] Referring to FIG. 2, in operation (210), a manufacturing method according to one embodiment may include an operation of heating a rod. The rod of operation (210) may include the rod (160) of FIG. 1. For example, the rod may include a heating wire (e.g., heating wire (170) of FIG. 1) configured to emit heat from an electric current. Operation (210) may include an operation of heating the rod by applying an electric current to the rod. The heating wire included in the rod may be configured to radiate a magnetic field based on the electric current applied to the heating wire.

[0034] In one embodiment, the operation (210) may include heating the rod such that the temperature of the rod of the operation (210) falls within a temperature range including the crystallization temperature of the amorphous metal alloy (e.g., the amorphous metal alloy (110) of FIG. 1). For example, the crystallization temperature of the amorphous metal alloy may be determined based on the relationship between the temperature and heat flow of the amorphous metal alloy measured by differential scanning calorimetry (DSC) measurements. For example, referring to FIG. 2, an exemplary graph (200) (e.g., a DSC curve) between the temperature and heat flow of the amorphous metal alloy is shown. The temperature T1 at which the slope of the graph (200) increases may be referred to as the first crystallization temperature of the amorphous metal alloy. The operation (210) may include heating the rod (e.g., applying current to the rod) such that the temperature of the rod falls within a temperature range including the first crystallization temperature. When an amorphous metal alloy is included in the Fe system, the temperature T1 (e.g., first crystallization temperature) may be within the range from 300°C to 600°C, depending on the ratio of Fe and / or other transition metals.

[0035] Referring to FIG. 2, within operation (220), a manufacturing method according to one embodiment may include the operation of obtaining an amorphous metal alloy in a liquid state. For example, an amorphous metal alloy may be melted using a melting furnace (e.g., melting furnace (120) of FIG. 1) to obtain an amorphous metal alloy in a liquid state. The molten amorphous metal alloy may be transferred to a cooler (e.g., cooler (130) of FIG. 1).

[0036] Referring to FIG. 2, within operation (230), a manufacturing method according to one embodiment may include the operation of obtaining a metal strip from a liquid amorphous metal alloy. For example, operation (230) may include the operation of contacting a molten amorphous metal alloy with a cooler (e.g., cooler (130) of FIG. 1). Based on the contact, heat of the amorphous metal alloy may be transferred from the amorphous metal alloy to the cooler. Based on the transfer of heat, the amorphous metal alloy may solidify. In the cooler, the amorphous metal alloy may solidify into the form of a metal strip.

[0037] Referring to FIG. 2, in operation (240), a manufacturing method according to one embodiment may include an operation of winding a metal strip onto a heated rod for crystallization and / or magnetization of the metal strip. A metal strip obtained based on operation (230) may be transferred to a heated rod based on operation (210). Operation (240) may include an operation of winding a metal strip formed from an amorphous metal alloy onto a heated rod based on operation (210). In one embodiment, the rod may be connected to a rotor and / or motor for rotation of the rod. The rotor may be configured to rotate the rod so that the metal strip is wound onto the rod when (or while) current is applied to the rod.

[0038] Operation (240) may include an operation that causes crystallization of an amorphous metal alloy using the heat of a heated rod while the metal strip is wound around a heated rod. Operation (240) may include an operation that magnetizes the amorphous metal alloy using a magnetic field generated by an electric current. Operation (240) may be associated with a heat treatment process (e.g., an annealing process) of the metal strip for magnetization and / or crystallization. The heat treatment of the metal strip based on operation (240) may be performed (empirically) within a time interval between about 5 minutes and about 1 hour, depending on the time elapsed until the nucleation of nanocrystals is formed and / or the growth rate of said nanocrystals. The time the metal strip is wound around the rod based on operation (240) may be referred to as the holding time of the heat treatment process. In operation (240), the amorphous metal alloy may be changed into a nanocrystalline metal alloy based on crystallization.

[0039] Referring to FIG. 2, in operation (250), a manufacturing method according to one embodiment may include the operation of removing a metal strip wound on a rod to obtain a coiled metal strip. Operation (250) may include the operation of removing a metal strip wound on a rod heated based on operation (240). Operation (250) may include the operation of winding the removed metal strip to obtain a coiled metal strip (e.g., a nanocrystalline ribbon (145) of FIG. 1). The removed metal strip and / or coiled metal strip may be used to manufacture a component having soft magnetic properties, such as a core component of an inductor.

[0040] FIG. 3 illustrates a block diagram of a manufacturing apparatus (101) for manufacturing a metal strip (e.g., the metal strip (140) of FIG. 1). Referring to FIG. 3, a manufacturing apparatus (101) for magnetizing a metal strip formed from an amorphous metal alloy (e.g., the amorphous metal alloy (110) of FIG. 1) may be provided. The manufacturing apparatus (101) may be referred to as an electronic device.

[0041] Referring to FIG. 3, the manufacturing device (101) may include one or more heating wires (330). The manufacturing device (101) may include a rod (160) comprising one or more heating wires (330). The rod (160) may be formed from non-magnetic iron, for example, austenitic stainless steel. The austenitic stainless steel may be an iron-based Cr-Ni-C alloy, such as SUS 304 stainless steel and / or SUS 316 stainless steel. The rod (160) may be formed from iron (e.g., the austenitic stainless steel described above) having corrosion resistance, high temperature stability, and / or high permeability. The non-magnetic iron included in the rod (160) may include 4 wt% (weight %) or less of molybdenum (Mo) and / or 0.7 wt% or less of titanium (Ti) to improve corrosion resistance and strength.

[0042] Referring to FIG. 3, the manufacturing device (101) may include a motor (340) configured to rotate a rod (160). For example, a rotor included in the motor (340) may be connected to the rod (160). The manufacturing device (101) may include one or more heating wires (330) and / or a control circuit (310) connected to the motor (340).

[0043] In one embodiment, the control circuit (310) may be configured to heat the rod (160) by applying current to one or more heating wires (330) of the rod (160). While current is applied to one or more heating wires (330), a metal strip may be wound around the rod (160) so that the metal strip is magnetized by a magnetic field (e.g., magnetic field (180) of FIG. 1) generated by the current. The control circuit (310) may be configured to apply current to one or more heating wires (330) of the rod (160) so that the temperature of the rod (160) is included in a temperature range including the crystallization temperature of the amorphous metal alloy (e.g., temperature T1 of FIG. 2). The amorphous metal alloy may crystallize based on contact with the rod (160) within the temperature range. For example, the above amorphous metal alloy can be changed into a nanocrystalline metal alloy based on the crystallization.

[0044] In one embodiment, the manufacturing device (101) may include a temperature sensor (350) configured to detect the temperature of a load (160). A control circuit (310) operatively and / or electrically coupled with one or more heating wires (330), a motor (340), and / or the temperature sensor (350) may determine whether the temperature of the load (160) falls within a temperature range for magnetization and / or crystallization of the metal strip using the temperature measured through the temperature sensor (350). Based on whether the temperature of the load (160) falls within the temperature range, the control circuit (310) may change or determine the magnitude of the voltage and / or current applied to one or more heating wires (330).

[0045] A rod (160) connected to a motor (340) (or a rotor included in the motor (340)) may have the shape of a hollow cylinder. One or more heating wires (330) may be attached to or connected to the inner wall of the rod (160). In one embodiment in which a plurality of heating wires are attached to the inner wall of the rod (160), the spacing of the heating wires on the inner wall may be equal to each other. For example, to cause a uniform temperature distribution on the outer wall of the rod (160), the heating wires may be spaced at equal intervals on the inner wall of the rod (160). For example, the spacing may be about 3.5 cm or less.

[0046] As described above, the control circuit (310) can change the temperature distribution of the load (160) by applying current to one or more heating wires (330). Below, exemplary structures of the load (160) and one or more heating wires (330) of FIG. 3 are described with reference to FIG. 4a to 4d.

[0047] FIGS. 4a, FIGS. 4b, FIGS. 4c, and FIGS. 4d schematically illustrate exemplary structures of a rod (160) on which a metal strip (e.g., the metal strip (140) of FIG. 1) is wound.

[0048] Referring to FIG. 4a, an exemplary structure of a cylindrical rod (160) is shown, around which a metal strip formed from an amorphous metal alloy is wound. While the rod (160) is rotated, the metal strip may be wound on the curved surface of the rod (160). A heating wire (170) may be positioned along the center (e.g., axis of rotation) of the rod (160). When current is applied to the heating wire (170), a magnetic field (411) may be formed around the heating wire (170). When current is applied to the heating wire (170), heat may be released from the heating wire (170) out of the rod (160) (e.g., to the metal strip in contact with the rod (160)). By direct contact between the rod (160) and the metal strip, the metal strip may crystallize based on a high heating rate (e.g., rapid formation of nanocrystal nuclei). For stable contact between the metal strip and the rod (160), oil (e.g., high temperature stable oil and / or insulating oil) may be applied to the curved surface of the rod (160).

[0049] The number of heating wires (170) within the rod (160) may be one or more. Referring to FIG. 4b, an embodiment is shown in which four heating wires (170-1, 170-2, 170-3, 170-4) are positioned on the inner wall of the rod (160). Referring to FIG. 4b, the rod (160) may include a cylindrical metal (422) having a thickness of about 1 cm. The opening (423) of the metal (422) may have a cylindrical shape. The thickness of the metal (422) (or the thickness between the inner wall and the outer wall of the rod (160)) may be uniformly formed to about 1 cm for the rigidity of the rod (160) and / or the thermal conductivity characteristics of the rod (160) (e.g., rapid heat transfer).

[0050] Referring to FIG. 4b, four heating wires (170-1, 170-2, 170-3, 170-4) may be attached to the inner wall of the rod (160). The four heating wires (170-1, 170-2, 170-3, 170-4) may be configured to emit heat based on a DC voltage power signal. The heat emitted from the four heating wires (170-1, 170-2, 170-3, 170-4) may be transmitted through the metal (422) of the rod (160) to a metal strip in contact with the outer wall of the rod (160). In the inner wall of the rod (160), four heating wires (170-1, 170-2, 170-3, 170-4) may have equal spacing (e.g., spacing of about 3 cm or less). For the inner diameter R of the rod (160) including the opening (423), the number of heating wires (e.g., four heating wires (170-1, 170-2, 170-3, 170-4)) attached to the inner wall of the rod (160) may be determined or designed based on Equation 1 so that the spacing between the heating wires is maintained at 3 cm.

[0051]

[0052] π in Equation 1 may represent the ratio of a circle's circumference to its diameter. According to Equation 1, when the inner diameter R of the rod (160) is 8 cm, at least 8 heating wires can be in contact with the inner wall of the rod (160). According to Equation 1, when the inner diameter R of the rod (160) is 16 cm, at least 16 heating wires can be in contact with the inner wall of the rod (160).

[0053] Referring to FIG. 4b, when currents flow through each of the four heating wires (170-1, 170-2, 170-3, 170-4), magnetic fields (421-1, 421-2, 421-3, 421-4) formed in each of the four heating wires (170-1, 170-2, 170-3, 170-4) are illustrated. Since the rotational directions of the magnetic fields (421-1, 421-2, 421-3, 421-4) all coincide (counterclockwise in one embodiment of FIG. 4b), a magnetic field (421) can be formed outside the rod (160). By the magnetic field (421), a metal strip in contact with the rod (160) can be magnetized.

[0054] In one embodiment of FIGS. 4a and 4b, the rod (160) may have a uniform temperature distribution (or temperature gradient) by means of at least one heating wire (e.g., the heating wire (170) of FIG. 4a and / or the heating wires (170-1, 170-2, 170-3, 170-4)) extending from one end of the rod (160) to the other end of the rod (160). The embodiment is not limited thereto.

[0055] Referring to FIG. 4c, the rod (160) may include a first part (160-1) (or first rotor), an insulating structure (432), and a second part (160-2) (or second rotor). The insulating structure (432) may be positioned between the first part (160-1) and the second part (160-2) of the rod (160). The insulating structure (432) may include a heat dissipation material such as ceramic, aluminum oxide (Al2O3), zirconia (ZrO2), and / or silicon carbide (SiC) to cause and / or maintain a temperature difference between the first part (160-1) and the second part (160-2). Referring to FIG. 4c, four heating wires (170-5, 170-6, 170-7, 170-8) may be included in the first part (160-1) of the rod (160) divided by the insulating structure (432). Four heating wires (170-9, 170-10, 170-11, 170-12) may be included in the second part (160-2) of the rod (160) divided by the insulating structure (432). A control circuit (e.g., control circuit (310) of FIG. 3) connected to the heating wires (170-5, 170-6, 170-7, 170-8, 170-9, 170-10, 170-11, 170-12) can make the current flowing through each of the heating wires (170-5, 170-6, 170-7, 170-8) of the first part (160-1) different from the current flowing through each of the heating wires (170-9, 170-10, 170-11, 170-12) of the second part (160-2), thereby making the temperatures of the first part (160-1) and the second part (160-2) different (e.g., two-stage annealing process).

[0056] For example, in one embodiment where a metal strip transferred to a rod (160) is first wound on the first part (160-1) among the first part (160-1) and the second part (160-2), the temperature of the first part (160-1) may be heated to a relatively high temperature (e.g., a temperature about 10°C to about 30°C higher than the first crystallization temperature, including the temperature T1 of FIG. 2) so that nanocrystal nuclei can be rapidly generated. The size of the first part (160-1) (e.g., the length of the first part (160-1)) may be designed so that the metal strip wound on the first part (160-1) is wound for a relatively short period (e.g., about 10 seconds to about 2 minutes) in the first part (160-1). The temperature of the second part (160-2) may be heated to a relatively low temperature (e.g., a temperature about 10°C to about 30°C lower than the first crystallization temperature, including the temperature T1 of FIG. 2) for the growth of nanocrystal nuclei. The size of the second part (160-2) (e.g., the length of the second part (160-2)) may be designed so that the metal strip wound around the second part (160-2) is wound around the second part (160-2) for a relatively long time (e.g., about 1 hour). For example, the length of the first part (160-1) may be shorter than the length of the second part (160-2).

[0057] In the above example, so that the temperature of the first part (160-1) is higher than the temperature of the second part (160-2), the control circuit may apply a current greater than the current flowing through the heating wires (170-5, 170-6, 170-7, 170-8) of the first part (160-1) than the current flowing through the heating wires (170-9, 170-10, 170-11, 170-12) of the second part (160-2). By applying different currents to the heating wires placed in each part of the load (160), the control circuit may cause each part of the load (160) to have different temperatures.

[0058] For example, the control circuit may be configured to maintain the temperature of the first portion (160-1) of the rod (160) around which the metal strip is wound at a first temperature. For example, the operation (210) of FIG. 2 may include maintaining the temperature of the first portion (160-1) of the rod (160) at a first temperature and / or heating it. Due to the relatively high temperature of the first portion (160-1), the crystal nucleation fraction of the metal strip may be increased by a relatively fast heating rate. Since a number of crystal grains grow from the nanocrystal nuclei generated in the first portion (160-1), a nanocrystalline ribbon (e.g., the nanocrystalline ribbon (145) of FIG. 1) having an increased crystallization fraction may be produced. As the crystallization fraction increases, the coercivity may be reduced and the saturation magnetic flux density may be increased, so a nanocrystalline ribbon having improved soft magnetic properties may be produced.

[0059] For example, the control circuit may be configured to maintain the temperature of the second portion (160-2) of the load (160) around which the metal strip is wound at a second temperature below the first temperature. For example, the operation (210) of FIG. 2 may include maintaining the temperature of the second portion (160-2) of the load (160) at a second temperature below the first temperature and / or heating it.

[0060] Referring to FIG. 4d, an embodiment is illustrated in which 16 heating wires (e.g., heating wires (171-1, 172-2)) are arranged on a rod (160) comprising different parts that can be controlled to have independent temperatures. The radius (d1) of the inner diameter of the rod (160) and the spacing (d2) between the heating wires (171-1, 171-2) may have the relationship of Equation 1. Because the different parts of the rod (160) each have different temperatures set based on a two-stage annealing process, the metal strip wound on the rod (160) of FIG. 4d (or the rod (160) of FIG. 4c) may have a 50% reduced coercivity at the same saturation magnetization (e.g., 191 emu / g) compared to a rod having a uniform temperature distribution (e.g., the rod (160) of FIG. 4a and / or FIG. 4b).

[0061] FIGS. 5A and 5B illustrate graphs (501, 502) for illustrating the temperature gradient of a rod (160) around which a metal strip (e.g., the metal strip (140) of FIG. 1) is wound.

[0062] For example, the rod (160) of FIG. 5a may have the structure of FIG. 4a and / or FIG. 4b. Referring to FIG. 5a, a graph (501) showing the temperature distribution of the rod (160) is shown in one embodiment in which a metal strip is wound around the curved surface of the rod (160) along the direction (510). Referring to the graph (501), the rod (160) may have a uniform temperature by means of heating wires arranged along the direction of the rod (160) (e.g., the longitudinal direction) (e.g., the heating wire (170) of FIG. 4a and / or the heating wires (170-1, 170-2, 170-3, 170-4) of FIG. 4b). The maximum temperature of the rod (160) shown by the graph (501) may correspond to the crystallization temperature of the metal strip to be wound on the rod (160) along the direction (510) (e.g., temperature T1 in FIG. 2), or may have an error of less than a specified ratio from the crystallization temperature.

[0063] For example, the rod (160) of FIG. 5b may have the structure of FIG. 4c and / or FIG. 4d. Referring to FIG. 5b, in one embodiment where a metal strip is wound around the curved surface of the rod (160) along the direction (510), a graph (502) showing the temperature distribution of the rod (160) is shown. The rod (160) including an insulating structure (e.g., the insulating structure (432) of FIG. 4c) may be divided into sections (521, 522, 523, 524) including a section (522) corresponding to the insulating structure. Referring to FIG. 5b, a graph (502) showing the temperature distribution of different sections (521, 522, 523, 524) of the rod (160) is shown. The maximum temperature of section (521) may be higher than the temperatures of other sections (522, 523, 524). For example, the maximum temperature of section (521) may correspond to the temperature of the first section (160-1) of FIG. 4c. The maximum temperature of section (523) may be lower than the maximum temperature of section (521). For example, the maximum temperature of section (523) may correspond to the temperature of the second section (160-2) of FIG. 4c.

[0064] Referring to FIG. 5b, as the metal strip is wound onto the rod (160) along the direction (510), the metal strip can be heated to the maximum temperature of section (521) of the rod (160). After being heated to the maximum temperature of section (521), the temperature of the metal strip can be changed to the maximum temperature of section (523) or reduced. For example, the two-stage annealing process described with reference to FIG. 4c and / or FIG. 4d may be performed.

[0065] FIG. 6 illustrates an example of a component (e.g., an inductor (690)) comprising at least partially a metal strip manufactured by a manufacturing method according to one embodiment, and an electronic device (601) comprising said component. The electronic device (601) may be described as an electronic device capable of displaying images. For example, the electronic device (601) may include a TV (television), a monitor, a computer, a smartphone, a tablet PC (personal computer), a portable media player, a wearable device, a video wall, an electronic photo frame, etc. The electronic device (601) may be referred to as a display device. For convenience of explanation, the following description assumes that the electronic device (601) is implemented as a TV, but the embodiment is not limited thereto.

[0066] The electronic device (601) may be configured to operate by power provided from the power system (610) (e.g., alternating current (AC) power signal, and / or alternating current signal). The power system (610) (or power distribution system) may be described as infrastructure built to provide power. The electronic device (601) may include a plug (620) (or port, power cord) configured to be connected to a power outlet (or outlet, socket, receptacle) located at one end of the power system (610). The plug (620) may be connected to a component of the electronic device (601) for power conversion (e.g., power conversion from an alternating current signal to a direct current (DC) signal (or DC power signal)) (e.g., an AC-DC adapter (or power adapter) and / or a power circuit (670) described later with reference to FIG. 6).

[0067] While the plug (620) is electrically connected to the power system (610), the electronic device (601) can perform a function to output video, sound, or a combination thereof (e.g., multimedia content) based on the power of the power system (610). When the electronic device (601) receives information representing video and / or sound, the electronic device (601) can perform the function using said information. The information representing video and / or sound may be stored in the electronic device (601) or received from an external electronic device (e.g., a set-top box (STB)) (630) connected to the electronic device (601). The electronic device (601) may include an antenna configured to receive said information wirelessly or may be electrically connected to said antenna.

[0068] While receiving power from the power system (610) through the plug (620), the electronic device (601) may be operated according to any one of a normal mode (or active mode, enabled mode) and a standby mode (or inactive mode, disabled mode, hibernate mode, sleep mode). The normal mode may be described as a mode that consumes power exceeding the power consumption of the standby mode (e.g., standby power) to output video. The modes of the electronic device (601) are not limited to the normal mode and the standby mode. In this disclosure, the term “mode” may be used interchangeably with the term “state.” In the standby mode, the output of video and sound by the electronic device (601) may be substantially stopped or minimized. In standby mode, the electronic device (601) may output a message (e.g., “Press the power button”) guiding input to switch to normal mode. The message may be output through the display and / or speaker of the electronic device (601). In normal mode, the electronic device (601) may output video (e.g., video different from the message) and / or sound. The electronic device (601) may switch between standby mode and normal mode, or toggle, based on user input.

[0069] The electronic device (601) may include hardware for receiving user input for controlling the electronic device (601) (e.g., user input for switching between standby mode and normal mode). For example, the electronic device (601) may include a switch (or button) that is at least partially visible through the housing of the electronic device (601). For example, the electronic device (601) may include a touch sensor (e.g., a pressure-sensitive touch sensor and / or a capacitive touch sensor) for detecting touch input on at least a portion of the housing. User input may include a direct action by the user on the electronic device (601) (e.g., pressing a switch and / or button, or touching one side of the housing). Embodiments are not limited thereto, but user input may be identified by an audio signal representing the user's speech received through a microphone. The embodiments are not limited thereto, and user input may include indirect actions of the user related to the electronic device (601) based on the remote controller (640).

[0070] Referring to FIG. 6, the electronic device (601) may be configured to receive a wireless signal (or optical signal) from a remote controller (640) based on infrared (IR). Embodiments are not limited thereto, and the remote controller (640) may be configured to transmit a wireless signal based on Bluetooth, BLE (Bluetooth low energy), NFC (near-field communication), UWB (ultra-wideband), WiFi (wireless fidelity), WiFi-direct, and / or other wireless short-range communication protocols. For example, the electronic device (601) may be configured to receive a wireless signal based on the illustrated wireless short-range communication protocols. In both standby mode and normal mode, the electronic device (601) may be configured to receive a wireless signal from the remote controller (640).

[0071] FIG. 6 includes an exploded perspective view illustrating electronic components included in an electronic device (601). The electronic device (601) may include a housing (650), a display panel (660), a power circuit (670), and a main circuitry (680). The housing (650) may include a rear cover (or back cover, back cover) of the electronic device (601). The housing (650) may include an object for supporting the electronic device (601) (e.g., support legs and / or VESA (video electronics standards association) mount holes). One side of the electronic device (601) where the housing (650) is visible may be described as the rear side (e.g., rear side) of the electronic device (601).

[0072] The other side of the electronic device (601), opposite to one side of the electronic device (601) where the housing (650) is visible, may be described as the front side (e.g., front side) of the electronic device (601). A display panel (660) may be visible from the front side of the electronic device (601). The display panel (660) may include a liquid crystal display (LCD), a plasma display panel (PDP), and a plurality of LEDs. The LEDs of the display panel (660) may include organic LEDs (OLED). In one embodiment, the display panel (660) may include electronic paper. If the display panel (660) has a flat shape, the display panel (660) may be referred to as a flat panel display (FPD). If the display panel (660) has a curved shape, the display panel (660) may be referred to as a curved display. If the display panel (660) has a deformable shape, the display panel (660) may be referred to as a bendable display, a flexible display, and / or a rollable display.

[0073] The main circuit (680) may be configured to execute the functions of the electronic device (601) described above (e.g., a function for outputting video, sound, or a combination thereof, a turn-on function, a turn-off function, a function for adjusting volume, a function for changing channels, and / or a function for controlling the execution of a software application (e.g., an OTT (over the top) application) installed on the electronic device (601). For example, the main circuit (680) may control the display panel (660) using information received from an external electronic device (630) (or an antenna of the electronic device (601)) to output audio, image, video, or any combination thereof that appears according to said information. For example, the main circuit (680) may be configured to control the display panel (660). The power circuit (670) may be configured to provide power to the main circuit (680). The power circuit (670) may be configured to convert an alternating current signal received from the power system (610) into a direct current (DC) signal for driving the main circuit (680). For example, the power circuit (670) may be configured to transmit a direct current signal to the main circuit (680).

[0074] Referring to FIG. 6, an inductor (690) included in a power circuit (670) (e.g., an electromagnetic interference (EMI) filter of the power circuit (670)) is shown as an example of an electronic component included in an electronic device (601). The inductor (690) may correspond to at least a portion of a transformer included in the EMI filter. The inductor (690) may include a core component (691) formed from a metal strip (or a nanocrystalline ribbon (145) of FIG. 1) described with reference to FIG. 1 to 3, FIG. 4a to 4d, and / or FIG. 5a to 5b. For example, the core component (691) may be manufactured using at least a portion of the nanocrystalline ribbon (145) of FIG. 1. The inductor (690) may include a wire (692) wound around the core component (691). As described above, since the nanocrystalline ribbon (145) of FIG. 1 has increased saturation magnetization, reduced coercivity, and / or high permeability, an inductor (690) including a core component (691) made from the nanocrystalline ribbon (145) can have increased inductance.

[0075] FIG. 7 is a graph (710, 720) for illustrating the saturation magnetic force and coercivity of a metal strip (e.g., the metal strip (140) of FIG. 1) manufactured by a manufacturing method according to one embodiment.

[0076] Graphs (710, 720) illustrate a graph (710) showing the saturation magnetic force and a graph (720) showing the coercivity of a nanocrystalline ribbon (e.g., nanocrystalline ribbon (145) of FIG. 1) prepared from an amorphous metal alloy (e.g., Fe-BC-Cu metal alloy) based on a one-stage annealing process (e.g., annealing process based on the rod (160) of FIG. 4a and / or FIG. 4b).

[0077] Referring to Table 1, the saturation magnetic force, coercivity, and grain size of a nanocrystalline ribbon prepared from an amorphous metal alloy (e.g., Fe-BC-Cu metal alloy) based on a two-stage annealing process (e.g., annealing process based on the rod (160) of FIG. 4c and / or FIG. 4d) are shown.

[0078] Temperature (°C) of Part 1 (e.g., Part 1 (160-1) in FIG. 4c) Temperature (°C) of Part 2 (e.g., Part 2 (160-2) in FIG. 4c) Holding time (sec) Saturation magnetic force (emu / g) Coercivity (Oe) Grain size (nm) Condition 1 4 10 3 90 60 18 0 0.45 2 0.6 Condition 2 4 10 40 60 18 8 0.59 2 4.5 Condition 3 4 20 3 90 60 18 9 0.49 2 0.9 Condition 4 20 40 60 19 10.54 2 3.9 Condition 5 4 20 3 90 90 19 10.57 2 1.8 Condition 6 4 20 3 90 15 19 3 0.57 2 3.9

[0079] Referring to the graph (710) showing the saturation magnetic force, when the temperature of the rod is uniformly distributed at 410 ℃, the saturation magnetic force can be about 184 emu / g. Referring to the second condition in Table 1, when the temperature of the first part of the rod is 410 ℃ and the temperature of the second part of the rod is 400 ℃, the saturation magnetic force can be increased to about 188 emu / g, which is more than about 184 emu / g. In other words, by using a two-stage annealing process, a metal strip having increased saturation magnetic force and / or low coercivity can be manufactured.

[0080] As described above, a manufacturing method for producing a nanocrystalline ribbon, a manufacturing apparatus, and an electronic component produced from the nanocrystalline ribbon may be provided. Magnetization and / or crystallization of an amorphous metal alloy may be performed substantially simultaneously based on direct contact with a heat source. The temperature of the heat source may be determined based on the crystallization temperature of the amorphous metal alloy. The heat source may include a heating wire for forming a magnetic field. By the magnetic field, the amorphous metal alloy may be changed into a nanocrystalline metal alloy.

[0081] In one embodiment, a method for magnetizing and / or crystallizing a metal strip formed from an amorphous metal alloy may be required. In one embodiment, a method for improving the inductance, saturation magnetic force, and / or coercivity of the metal strip based on an annealing process may be required. In one embodiment as described above, a manufacturing method for crystallizing a metal strip (e.g., metal strip (140) of FIG. 1) may be provided. The manufacturing method may include the operation of heating a rod (e.g., rod (60) of FIG. 1) by applying current to the rod. The manufacturing method may include the operation of winding a metal strip formed from an amorphous metal alloy (e.g., amorphous metal alloy (110) of FIG. 1) onto the heated rod. The above manufacturing method may include the operation of causing crystallization of the amorphous metal alloy using the heat of the heated rod while the metal strip is wound on the heated rod, and magnetizing the amorphous metal alloy using a magnetic field generated by the current. The above manufacturing method may include the operation of removing the metal strip wound on the heated rod. In one embodiment, a manufacturing method for magnetizing and / or crystallizing a metal strip formed from an amorphous metal alloy may be provided. In one embodiment, a metal strip with improved inductance, saturation magnetic force, and / or coercivity of the strip may be provided, manufactured based on an annealing process.

[0082] For example, the heating operation may include heating the rod such that the temperature of the rod is included in a temperature range including the crystallization temperature of the amorphous metal alloy. For example, crystallization of the metal strip may be performed by the rod included in the temperature range.

[0083] For example, the load may include a heating wire (e.g., the heating wire (170) of FIG. 1) configured to emit heat from the current.

[0084] For example, the heating wire may be configured to radiate the magnetic field based on the current applied to the heating wire. The magnetic field may cause crystallization of the metal strip.

[0085] For example, the above amorphous metal alloy can be changed into a nanocrystalline metal alloy based on the crystallization.

[0086] For example, the manufacturing method may include the operation of winding the extracted metal strip to obtain a coiled metal strip.

[0087] For example, the rod is a first rod, and the manufacturing method may include the operation of obtaining the amorphous metal alloy in a liquid state. The manufacturing method may include the operation of winding the amorphous metal alloy in a liquid state onto a second rod to obtain the metal strip to be wound onto the heated rod.

[0088] For example, the above rod may be connected to a rotor for the rotation of the above rod.

[0089] For example, the rotor may be configured to rotate the rod so that the metal strip is wound around the rod when the current is applied to the rod.

[0090] For example, the extracted metal strip can be used to form a core component of an inductor.

[0091] For example, the heating operation may include an operation to maintain the temperature of a first part of the rod at a first temperature. The heating operation may include an operation to maintain the temperature of a second part of the rod at a second temperature below the first temperature.

[0092] For example, the above-mentioned rod may include an insulating structure disposed between the first part and the second part.

[0093] An electronic device according to one embodiment as described above may include an inductor. The inductor may include a core component formed from a metal strip. The metal strip may be manufactured by winding the metal strip, formed from an amorphous metal alloy, onto a rod. The rod may be heated based on receiving an electric current. The metal strip may be manufactured by using the heat of the heated rod to cause crystallization of the amorphous metal alloy while the metal strip is wound onto the rod, and by using a magnetic field generated by the electric current to magnetize the amorphous metal alloy. The metal strip may be manufactured by removing the metal strip wound onto the heated rod.

[0094] For example, the metal strip can be manufactured by the operation of winding the metal strip onto the rod, which is heated to be included in a temperature range including the crystallization temperature of the amorphous metal alloy.

[0095] For example, the above inductor may be included in the electromagnetic interference (EMI) filter of the electronic device.

[0096] For example, the above load may include a heating wire configured to release heat from the current.

[0097] For example, the rod is a first rod, and the metal strip can be manufactured by an operation of obtaining the amorphous metal alloy in a liquid state. The metal strip can be manufactured by an operation of obtaining the metal strip to be wound on the first rod by winding the amorphous metal alloy in a liquid state onto a second rod.

[0098] For example, the metal strip may be manufactured by winding the metal strip onto a first portion of the rod having a first temperature for crystallization. The metal strip may be manufactured by winding the metal strip onto a second portion of the rod located after the first portion and having a second temperature lower than the first temperature.

[0099] For example, the second temperature may be a temperature set based on the growth rate of the crystal formed within the metal strip in the first part.

[0100] For example, the inductor may include a wire wound around the core component.

[0101] In one embodiment as described above, an electronic device for magnetizing a metal strip formed from an amorphous metal alloy may be provided. The electronic device may include a rod comprising a heating wire. The electronic device may include a motor configured to rotate the rod. The electronic device may include a control circuit connected to the heating wire and the motor. The control circuit may be configured to heat the rod by applying current to the heating wire of the rod. The control circuit may be configured to wind the metal strip around the rod so that the metal strip is magnetized by a magnetic field generated by the current while the current is applied to the heating wire.

[0102] For example, the control circuit may be configured to apply the current to the heating wire of the load such that the temperature of the load is included in a temperature range including the crystallization temperature of the amorphous metal alloy.

[0103] For example, the amorphous metal alloy may crystallize based on contact with the rod within the temperature range.

[0104] For example, the above amorphous metal alloy can be changed into a nanocrystalline metal alloy based on the crystallization.

[0105] For example, the electronic device may include a temperature sensor configured to detect the temperature of the load.

[0106] For example, the rod may include a first rod and a second rod configured to rotate to move the amorphous metal alloy with the first rod.

[0107] For example, the amorphous metal alloy may come into contact with the second rod in a liquid state. While moving on the second rod, the amorphous metal alloy may transition from the liquid state to a solid state.

[0108] For example, the control circuit may be configured to maintain the temperature of a first portion of the rod on which the metal strip is wound at the first temperature. The control circuit may be configured to maintain the temperature of a second portion of the rod on which the metal strip is wound, which is connected to the first portion and in contact with the first portion, at a second temperature below the first temperature.

[0109] As used herein, the term “if” will be understood, depending on the context, to mean “when, upon,” “in response to a decision,” or “in response to a detection.” Similarly, “when decided to,” or “when [the mentioned condition or event] is detected,” will be understood, optionally, to mean “when decided,” or “in response to a decision,” “when [the mentioned condition or event] is detected,” or “in response to detecting [the mentioned condition or event].”

[0110] The device described above may be implemented as a hardware component, a software component, and / or a combination of a hardware component and a software component. For example, the device and components described in the embodiments may be implemented using one or more general-purpose or special-purpose computers, such as a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing unit may execute an operating system (OS) and one or more software applications executed on said operating system. Additionally, the processing unit may access, store, manipulate, process, and generate data in response to the execution of the software. For ease of understanding, the processing unit may be described as being used as a single unit, but those skilled in the art will understand that the processing unit may include multiple processing elements and / or multiple types of processing elements. For example, the processing unit may include multiple processors or one processor and one controller. In addition, other processing configurations, such as parallel processors, are also possible.

[0111] Software may include computer programs, code, instructions, or a combination of one or more of these, and may configure a processing unit to operate as desired or instruct the processing unit independently or collectively. Software and / or data may be embodied in any type of machine, component, physical device, computer storage medium, or device so as to be interpreted by the processing unit or to provide instructions or data to the processing unit. Software may be distributed over networked computer systems and may be stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

[0112] The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. In this case, the medium may continuously store a program executable by a computer, or temporarily store it for execution or download. Additionally, the medium may be various recording or storage means in the form of a single or several hardware combined, and may not be limited to a medium directly connected to a computer system but may exist distributed over a network. Examples of media may include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs and DVDs; magneto-optical media such as floptical disks; and media configured to store program instructions, including ROM, RAM, and flash memory. Additionally, other examples of media may include recording or storage media managed by app stores that distribute applications or sites and servers that supply or distribute various other software.

[0113] Although the embodiments have been described above with reference to limited examples and drawings, those skilled in the art can make various modifications and variations from the description above. For example, suitable results can be achieved even if the described techniques are performed in a different order than described, and / or the components of the described system, structure, device, circuit, etc. are combined or assembled in a form different from described, or replaced or substituted by other components or equivalents.

[0114] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims set forth below.

Claims

1. In a method for manufacturing crystallization of a metal strip: The operation of applying current to a rod to heat the rod; The operation of winding a metal strip formed from an amorphous metal alloy onto the above-mentioned heated rod; While the metal strip is wound around the heated rod, the operation of causing crystallization of the amorphous metal alloy using the heat of the heated rod and magnetizing the amorphous metal alloy using a magnetic field generated by the current; and The operation of removing the metal strip wound on the heated rod, Manufacturing method.

2. In claim 1, the heating operation is, The operation of heating the rod such that the temperature of the rod is included in a temperature range including the crystallization temperature of the amorphous metal alloy, Manufacturing method.

3. In claim 2, the rod is, A heating wire configured to emit heat from the above current, comprising Manufacturing method.

4. In claim 3, the heating wire is, Configured to radiate the magnetic field based on the current applied to the heating wire, Manufacturing method.

5. In claims 1 to 4, the amorphous metal alloy is, Based on the above crystallization, changing into a nanocrystalline metal alloy, Manufacturing method.

6. In claims 1 to 5, The operation of winding the metal strip extracted above to obtain a coiled metal strip is further included. Manufacturing method.

7. In claims 1 to 6, the rod is a first rod, and The operation of obtaining the above amorphous metal alloy in a liquid state; The operation further comprises winding the amorphous metal alloy in the liquid state onto a second rod to obtain the metal strip to be wound onto the heated rod. Manufacturing method.

8. In claims 1 to 7, the rod is, Connected to a rotor for the rotation of the above rod, Manufacturing method.

9. In claim 8, the rotor is, Configured to rotate the rod so that the metal strip is wound around the rod when the above current is applied to the rod, Manufacturing method.

10. In claims 1 to 9, the extracted metal strip is, Used to form the core component of an inductor, Manufacturing method.

11. In claims 1 to 10, the heating operation is, The operation of maintaining the temperature of the first part of the above-mentioned load at the first temperature; The operation of maintaining the temperature of the second part of the above-mentioned load at a second temperature below the first temperature, Manufacturing method.

12. In claim 11, the rod is, A structure including an insulating structure disposed between the first part and the second part. Manufacturing method.

13. In an electronic device, Includes an inductor, The above inductor includes a core component formed from a metal strip, and The above metal strip is: The operation of winding the metal strip, formed from an amorphous metal alloy, onto a rod, wherein the rod is heated based on receiving an electric current; While the metal strip is wound on the rod, the operation of causing crystallization of the amorphous metal alloy using the heat of the heated rod and magnetizing the amorphous metal alloy using a magnetic field generated by the current; and Manufactured by the operation of extracting the metal strip wound on the heated rod, Electronic device.

14. In claim 13, the metal strip is, Manufactured by the operation of winding the metal strip onto the rod, which is heated to be included in a temperature range including the crystallization temperature of the amorphous metal alloy. Electronic device.

15. In claims 13 to 14, the inductor is, Included in the EMI (electromagnetic interference) filter of the above electronic device, Electronic device.

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