CN112635182B - Inductor and preparation method thereof - Google Patents
Inductor and preparation method thereof Download PDFInfo
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- CN112635182B CN112635182B CN202011322392.5A CN202011322392A CN112635182B CN 112635182 B CN112635182 B CN 112635182B CN 202011322392 A CN202011322392 A CN 202011322392A CN 112635182 B CN112635182 B CN 112635182B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
- H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core
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Abstract
The invention discloses an inductor and a preparation method thereof, wherein the method comprises the following steps: forming at least one array unit on the magnetic core block, wherein two coil areas are respectively embedded with the same number of coil leads which are linearly arranged, and two electrode areas are respectively embedded with electrode leads; cutting to obtain magnetic core slices; connecting the electrode leads of the two electrode areas and the coil leads of the two coil areas on a first cutting surface of the magnetic core slice by using a first conductive connecting wire; connecting the coil leads of the two coil areas on a second cutting surface of the magnetic core slice by using a second conductive connecting wire; respectively filling the first cutting surface and the second cutting surface with magnetic powder, and performing compression molding to form a first magnetic core and a second magnetic core; forming an electrode hole on the first magnetic core, and filling a metal material; forming an electrode sheet on the first magnetic core; and dividing the magnetic core slice according to the array units to obtain at least one inductance unit. The invention is beneficial to manufacturing small-sized inductors and producing inductor elements in batches.
Description
Technical Field
The invention relates to the technical field of inductors, in particular to an inductor and a preparation method thereof.
Background
With the rapid development of electronic products, high frequency, integration and miniaturization are the technological development trends. Products such as smart mobile phones, pen power and the like mostly adopt a power management IC to uniformly manage various functional modules, and the power inductor plays a role in reducing ripple current. Demands for power type inductors are miniaturization, thinning, high frequency, low DCR, large current, low EMI (electromagnetic interference), and low manufacturing cost as a whole. The integrated inductor has the obvious advantage of high current resistance. In addition, the loss of the integrally formed inductor is lower, the conversion efficiency is higher, and the cruising ability of the mobile phone can be effectively improved; the overall size of the integrated inductor is smaller than that of other structures. In addition, the integrally formed inductor also has the following advantages: the electromagnetic property is stable, the temperature rise is stable, the audible noise is low, the electromagnetic compatibility is good, the impact resistance is high, and the like.
To traditional integrated into one piece inductance, need with coil spot welding on the work or material rest, less size is difficult to fix, and the rosin joint phenomenon appears easily, and welding resistance is higher.
In addition, to traditional integrated into one piece inductance, the coiling of coil is single channel coiling usually, and the increase of output needs to increase equipment cost, is unfavorable for large-scale production.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the inductor and the manufacturing method thereof are provided, and the small-sized integrally formed inductor can be manufactured in batches.
In order to solve the technical problems, the invention adopts the technical scheme that: a method of making an inductor, comprising:
(1) forming at least one array unit on a magnetic core block, wherein the array unit comprises a first coil area and a second coil area which are oppositely arranged, and a first electrode area and a second electrode area which are respectively positioned at two sides of the first coil area and the second coil area, the first coil area and the second coil area are respectively embedded with coil leads which are the same in number and are linearly arranged, the first electrode area and the second electrode area are respectively embedded with an electrode lead, and the coil leads and the electrode leads are parallel to each other;
(2) cutting the magnetic core block along a direction vertical to the length direction of the coil lead and the electrode lead to obtain a magnetic core slice;
(3) sequentially connecting an electrode lead of a first electrode area, a coil lead of a first coil area, a coil lead of a second coil area and an electrode lead of a second electrode area in the same array unit by using a first conductive connecting wire on a first cutting surface of the magnetic core slice;
connecting the coil conducting wire of the first coil area and the coil conducting wire of the second coil area in the same array unit by using a second conductive connecting wire on a second cutting surface of the magnetic core slice;
(4) respectively filling a first cutting surface and a second cutting surface of the magnetic core slice with magnetic powder, and performing compression molding to form a first magnetic core and a second magnetic core, wherein the first magnetic core is embedded in the first conductive connecting wire, and the second magnetic core is embedded in the second conductive connecting wire;
(5) punching a position, corresponding to the electrode lead, on the first magnetic core until a first conductive connecting wire on the electrode lead is exposed to form an electrode hole, and filling a metal material in the electrode hole;
(6) metallizing positions, corresponding to the first electrode area and the second electrode area, on the first magnetic core respectively to form electrode plates;
(7) and dividing the magnetic core slice according to the array units to obtain at least one inductance unit.
The invention also provides an inductor prepared by the preparation method of the inductor.
The invention has the beneficial effects that: the lead is formed into a coil structure in a combined mode, the problems of high coil winding difficulty and the like in the traditional small inductor preparation process are solved, small-sized inductors can be manufactured conveniently, mass production of inductance elements is facilitated, and production efficiency is improved. The inductance magnetic core prepared by the method is more compact and has stronger saturation current resistance.
Drawings
Fig. 1 is a flowchart of a method for manufacturing an inductor according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a magnetic core block of an embedded conductor according to a first embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic diagram of the cutting process in step S2 according to the first embodiment of the invention;
FIG. 5 is a schematic structural diagram of a core slice according to a first embodiment of the present invention;
fig. 6 is a schematic connection diagram of the first cutting surface of the magnetic core slice in step S3 according to the first embodiment of the present invention;
fig. 7 is a schematic connection diagram of a second cut surface of the magnetic core slice in step S3 according to the first embodiment of the present invention;
fig. 8 is a schematic structural diagram of a core slice after the first core and the second core are formed in step S4 according to the first embodiment of the present invention;
fig. 9 is a schematic structural diagram of the magnetic core slice after punching in step S5 according to the first embodiment of the present invention;
fig. 10 is a schematic structural diagram of the magnetic core slice after the electrode hole is filled with the metal material in step S5 according to the first embodiment of the present invention;
fig. 11 is a schematic structural diagram of a magnetic core slice after electrode sheets are formed in step S6 according to a first embodiment of the present invention;
fig. 12 is a schematic diagram of the cutting process in step S7 according to the first embodiment of the invention.
Description of reference numerals:
10. a magnetic core block; 11. slicing a magnetic core; 12. a first magnetic core; 13. a second magnetic core; 14. an inductance unit;
101. a first coil region; 102. a second coil region; 103. a first electrode region; 104. a second electrode region;
21. a coil wire; 22. an electrode lead; 23. a first conductive connection line; 24. a second conductive connection line;
3. an insulating layer; 4. an electrode hole; 5. a metal material; 6. an electrode sheet.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, a method for manufacturing an inductor includes:
(1) forming at least one array unit on a magnetic core block, wherein the array unit comprises a first coil area and a second coil area which are oppositely arranged, and a first electrode area and a second electrode area which are respectively positioned at two sides of the first coil area and the second coil area, the first coil area and the second coil area are respectively embedded with coil leads which are the same in number and are linearly arranged, the first electrode area and the second electrode area are respectively embedded with an electrode lead, and the coil leads and the electrode leads are parallel to each other;
(2) cutting the magnetic core block along a direction vertical to the length direction of the coil lead and the electrode lead to obtain a magnetic core slice;
(3) sequentially connecting an electrode lead of a first electrode area, a coil lead of a first coil area, a coil lead of a second coil area and an electrode lead of a second electrode area in the same array unit by using a first conductive connecting wire on a first cutting surface of the magnetic core slice;
connecting the coil conducting wire of the first coil area and the coil conducting wire of the second coil area in the same array unit by using a second conductive connecting wire on a second cutting surface of the magnetic core slice;
(4) respectively filling a first cutting surface and a second cutting surface of the magnetic core slice with magnetic powder, and performing compression molding to form a first magnetic core and a second magnetic core, wherein the first magnetic core is embedded in the first conductive connecting wire, and the second magnetic core is embedded in the second conductive connecting wire;
(5) punching a position, corresponding to the electrode lead, on the first magnetic core until a first conductive connecting wire on the electrode lead is exposed to form an electrode hole, and filling a metal material in the electrode hole;
(6) metallizing positions, corresponding to the first electrode area and the second electrode area, on the first magnetic core respectively to form electrode plates;
(7) and dividing the magnetic core slice according to the array units to obtain at least one inductance unit.
From the above description, the beneficial effects of the present invention are: the method is beneficial to manufacturing small-sized inductors, is beneficial to producing inductor elements in batches and improves the production efficiency.
Further, the step (3) is specifically:
connecting an electrode lead of a first electrode area in the same array unit with a coil lead close to the first electrode area in the first coil area by using a first conductive connecting wire on a first cutting surface of the magnetic core slice, connecting a coil lead close to a second electrode area in the second coil area in the same array unit with an electrode lead of the second electrode area, and carrying out staggered connection on other coil leads of the first coil area and other coil leads of the second coil area in the same array unit in a one-to-one correspondence manner according to a linear arrangement sequence;
and connecting the coil conducting wires of the first coil area and the coil conducting wires of the second coil area in the same array unit in a one-to-one correspondence mode according to a linear arrangement sequence by using a second conductive connecting wire on a second cutting surface of the magnetic core slice.
As can be seen from the above description, the complete coil structure can be formed by connecting the electrode wire and the coil wire through the first conductive connecting wire and the second conductive connecting wire.
Further, in the step (4), the pressing pressure in the pressing forming is 30-300MPa, and the pressing temperature is 150-300 ℃.
Further, in the step (5), filling a metal material in the electrode hole specifically includes: forming an electroplating metal layer by a metal electroplating process, and filling the electrode hole; or, the electrode hole is filled by printing metal paste.
As can be seen from the above description, the electrodes are led out by filling the metal material to connect the first conductive connection line on the electrode lead and the electrode sheet formed later.
Further, the metal paste is a mixed paste formed by metal powder and a binder, the metal powder comprises at least one of copper powder, nickel powder, silver powder and gold powder, and the binder comprises at least one of acrylic resin, epoxy resin and phenolic resin.
Furthermore, insulating layers are arranged on the surfaces of the coil lead and the electrode lead; and the surfaces of the first conductive connecting wire and the second conductive connecting wire, which are not contacted with the coil lead and the electrode lead, are provided with insulating layers.
Furthermore, the coil conducting wire is flat, the width of the coil conducting wire is 0.05-0.5mm, and the thickness of the coil conducting wire is 0.02-0.2 mm.
Furthermore, the electrode lead is flat, the width of the electrode lead is 0.1-0.8mm, and the thickness of the electrode lead is 0.02-0.4 mm.
Furthermore, the cross section of the electrode plate is square, the width of the electrode plate is 0.05-2.0mm, and the thickness of the electrode plate is 0.02-0.2 mm.
The invention also provides an inductor prepared by the preparation method of the inductor.
Example one
Referring to fig. 1 to 12, a first embodiment of the present invention is: a method for manufacturing an inductor can be applied to manufacture an integrally formed inductor, as shown in FIG. 1, and comprises the following steps:
s1: at least one array unit is formed on the magnetic core block.
As shown in fig. 2, nine array units (9 identical area portions divided by a dotted line in fig. 2) are formed on the magnetic core block 10 in fig. 2, each array unit includes a first coil area 101 and a second coil area 102 which are oppositely arranged, and a first electrode area 103 and a second electrode area 104 which are respectively located at two sides of the first coil area 101 and the second coil area 102, the first coil area 101 and the second coil area 102 are respectively embedded with the same number of coil conducting wires 21 which are linearly arranged, the first electrode area 103 and the second electrode area 104 are respectively embedded with one electrode conducting wire 22, and the coil conducting wires 21 and the electrode conducting wires 22 are parallel to each other.
The first coil area and the second coil area are respectively provided with coil through holes penetrating through the magnetic core block, the number of the coil through holes in the first coil area and the number of the coil through holes in the second coil area are consistent and are linearly arranged, and preferably, the positions are in one-to-one correspondence; and coil leads are arranged in the coil through holes. The first electrode area and the second electrode area are respectively provided with an electrode through hole, and preferably, the positions of the two electrode through holes correspond to each other; and electrode leads are arranged in the electrode through holes.
Further, the coil wire and the electrode wire are provided with insulating layers on outer surfaces thereof except for the two end surfaces. As shown in fig. 3, an insulating layer 3 is provided between the coil wire 21 and the core block 10.
Preferably, the array units are arranged as close as possible to each other to improve the utilization of the magnetic core blocks. In fig. 2, 9 array elements are seamlessly arranged.
S2: and cutting the magnetic core block along the direction vertical to the length directions of the coil lead and the electrode lead to obtain a magnetic core slice.
As shown in fig. 4, the magnetic core block 10 is cut transversely to obtain at least one magnetic core slice 11, and 5 magnetic core slices are cut in fig. 4. A single core slice 11 is shown in figure 5.
S3: sequentially connecting an electrode lead of a first electrode area, a coil lead of a first coil area, a coil lead of a second coil area and an electrode lead of a second electrode area in the same array unit by using a first conductive connecting wire on a first cutting surface of the magnetic core slice; and connecting the coil conducting wire of the first coil area with the coil conducting wire of the second coil area in the same array unit by using a second conductive connecting wire on a second cutting surface of the magnetic core slice. Wherein the cutting surface is a surface parallel to the cutting direction.
Specifically, as shown in fig. 6, on the first cut surface of the core slice 11, the first conductive connection line 23 is used to connect the electrode wire of the first electrode area in the same array unit with the coil wire of the first coil area close to the first electrode area, connect the coil wire of the second coil area in the same array unit close to the second electrode area with the electrode wire of the second electrode area, and perform one-to-one offset connection on the other coil wires of the first coil area and the other coil wires of the second coil area in the same array unit according to the linear arrangement order.
For example, in the embodiment, taking the case that four coil wires are embedded in each coil region as an example, it is assumed that the coil wires are arranged in the direction from the first electrode region to the second electrode region, then, on the first cut surface of the magnetic core slice, the electrode wire of the first electrode area in the same array unit is connected with the first coil wire in the first coil area by using the first conductive connecting wire, the second coil wire in the first coil area is connected with the first coil wire in the second coil area, the third coil wire in the first coil area is connected with the second coil wire in the second coil area, the fourth coil wire in the first coil area is connected with the third coil wire in the second coil area, and the fourth coil wire in the second coil area is connected with the electrode wire in the second electrode area.
As shown in fig. 7, the coil wires of the first coil region and the coil wires of the second coil region in the same array unit are connected in a one-to-one correspondence in a linearly arranged order on the second cut surface of the core slice 11 using the second conductive connection line 24.
For example, the above example is also taken as an example, that is, on the second cut surface, the first coil wire in the first coil region and the first coil wire in the second coil region in the same array unit are connected by the second conductive connection wire, the second coil wire in the first coil region and the second coil wire in the second coil region are connected, the third coil wire in the first coil region and the third coil wire in the second coil region are connected, and the fourth coil wire in the first coil region and the fourth coil wire in the second coil region are connected.
At this time, the electrode lead and the coil lead can be combined to form a coil structure by connecting the first conductive connecting wire and the second conductive connecting wire.
Furthermore, the surfaces of the first conductive connecting wire and the second conductive connecting wire, which are not in contact with the coil lead and the electrode lead, are provided with insulating layers, namely, the areas in direct contact with the coil lead and the electrode lead are not provided with the insulating layers, and the other areas are attached with the insulating layers.
S4: fill with the magnetic powder respectively sliced first cutting face and the second cutting face of magnetic core to press forming forms first magnetic core and second magnetic core, first magnetic core embedding first electrically conductive connecting wire, the embedding of second magnetic core second electrically conductive connecting wire.
Filling the first cutting surface of the magnetic core slice with magnetic powder and performing compression molding to form a first magnetic core, wherein the first magnetic core covers the first cutting surface and is embedded with a first conductive connecting wire; and filling the second cutting surface of the magnetic core slice with magnetic powder and performing compression molding to form a second magnetic core, wherein the second magnetic core covers the second cutting surface and embeds a second conductive connecting wire. The core segment 11 after the first core 12 and the second core 13 are formed is shown in fig. 8.
Further, the magnetic powder is pressed under the pressure of 30-300MPa and the temperature of 150-300 ℃. Namely, the pressing pressure in the pressing treatment is 30-300MPa, and the pressing temperature is 150-300 ℃.
S5: and punching the position, corresponding to the electrode lead, on the first magnetic core until the first conductive connecting wire on the electrode lead is exposed to form an electrode hole, and filling a metal material in the electrode hole. The core segment 11 after the electrode hole 4 is punched out is shown in fig. 9, and the core segment 11 after the metal material 5 is filled is shown in fig. 10. The electrodes are led out by filling the metal material.
The metal material can be filled by adopting a metal electroplating process or a metal paste printing mode. Specifically, an electroplating metal layer is formed through a metal electroplating process to completely fill the electrode hole; i.e. metal is plated until the electrode holes are completely filled. Or the electrode holes are filled by printing metal paste. The metal slurry is mixed slurry formed by metal powder and a binder, the metal powder comprises at least one of copper powder, nickel powder, silver powder and gold powder, and the binder comprises at least one of acrylic resin, epoxy resin and phenolic resin.
S6: and metallizing positions, corresponding to the first electrode area and the second electrode area, on the first magnetic core respectively to form electrode plates. The core segment 11 after the formation of the electrode sheet 6 is shown in fig. 11.
S7: and dividing the magnetic core slice according to the array units to obtain at least one inductance unit. As shown in fig. 12, since nine array elements are formed on the core block in step S1, the core slice is cut in accordance with the area of the array elements at this time, and nine inductance elements 14 are obtained.
In an optional embodiment, the coil conducting wire is flat, the width of the coil conducting wire is 0.05-0.5mm, and the thickness of the coil conducting wire is 0.02-0.2 mm; the electrode lead is flat, the width of the electrode lead is 0.1-0.8mm, and the thickness of the electrode lead is 0.02-0.4 mm. The cross section of the electrode plate is square, the width of the electrode plate is 0.05-2.0mm, and the thickness of the electrode plate is 0.02-0.2 mm.
The magnetic core block body is made of at least one of atomized iron powder, reduced iron powder, carbonyl iron powder, iron-silicon-chromium alloy, iron-nickel alloy, iron-silicon alloy, iron-aluminum alloy, iron-silicon-aluminum alloy and amorphous alloy. The coil lead and the electrode lead are made of at least one of copper, nickel, silver and gold. The electrode plate is made of at least one of copper, nickel, silver, gold and tin.
The embodiment forms the wire into the coil structure in a combined mode, avoids the problems of high coil winding difficulty and the like in the traditional small inductor preparation process, is beneficial to manufacturing small-sized inductors, is beneficial to mass production of inductive elements, and improves the production efficiency. The inductance magnetic core prepared by the method is more compact and has stronger saturation current resistance.
Example two
The present embodiment is a specific embodiment of the first embodiment.
In this embodiment, the magnetic core block and the magnetic powder are made of iron-silicon-chromium alloy, the cross-sectional size of the coil wire is 0.2mm by 0.04mm, the cross-sectional size of the electrode wire is 0.2mm by 0.04mm, the coil wire and the electrode wire are made of copper materials, and the surfaces of the coil wire and the electrode wire are provided with insulating layers; the areas of the first conductive connecting line and the second conductive connecting line which are directly contacted with the coil conducting wire and the electrode conducting wire are not provided with insulating layers, and the other areas are attached with insulating layers; the height of the core slice is 0.8 mm. The pressure of the pressing forming process is 150MPa, the temperature during pressing is 200 ℃, the metal material used for filling the electrode holes is conductive slurry, the conductive slurry is a mixture of silver powder, copper powder and epoxy resin adhesive, the cross section size of the electrode slice is 1.0 x 0.1mm, and finally the integrally formed inductor with the size specification of 2.0mm x 1.0mm x 0.8mm is obtained.
EXAMPLE III
This embodiment is another specific embodiment of the first embodiment.
In this embodiment, the magnetic core block and the magnetic powder are carbonyl iron powder, the cross-sectional size of the coil wire is 0.1mm by 0.02mm, the cross-sectional size of the electrode wire is 0.1mm by 0.02mm, the coil wire and the electrode wire are both made of copper materials, and the surfaces of the coil wire and the electrode wire are attached with insulating layers; the areas of the first conductive connecting line and the second conductive connecting line which are directly contacted with the coil conducting wire and the electrode conducting wire are not provided with insulating layers, and the other areas are attached with insulating layers; the height of the core slice is 0.3 mm. The pressure of the used pressing forming process is 150MPa, the temperature during pressing is 150 ℃, the metal material filled in the electrode hole is electroplated copper, the cross section size of the electrode slice is 0.4 x 0.05mm, and finally the integrally formed inductor with the size specification of 0.8mm x 0.4mm x 0.3mm is obtained.
In summary, according to the inductor and the manufacturing method thereof provided by the invention, the wire is formed into the coil structure in a combined manner, so that the problems of high coil winding difficulty and the like in the conventional small inductor manufacturing process are solved, the small-sized inductor is favorably manufactured, the inductor elements are favorably produced in batch, and the production efficiency is improved. The inductance magnetic core prepared by the method is more compact and has stronger saturation current resistance.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of making an inductor, comprising:
(1) forming at least one array unit on a magnetic core block, wherein the array unit comprises a first coil area and a second coil area which are oppositely arranged, and a first electrode area and a second electrode area which are respectively positioned at two sides of the first coil area and the second coil area, the first coil area and the second coil area are respectively embedded with coil leads which are the same in number and are linearly arranged, the first electrode area and the second electrode area are respectively embedded with an electrode lead, and the coil leads and the electrode leads are parallel to each other;
(2) cutting the magnetic core block along a direction vertical to the length direction of the coil lead and the electrode lead to obtain a magnetic core slice;
(3) sequentially connecting an electrode lead of a first electrode area, a coil lead of a first coil area, a coil lead of a second coil area and an electrode lead of a second electrode area in the same array unit by using a first conductive connecting wire on a first cutting surface of the magnetic core slice;
connecting the coil conducting wire of the first coil area and the coil conducting wire of the second coil area in the same array unit by using a second conductive connecting wire on a second cutting surface of the magnetic core slice;
(4) respectively filling a first cutting surface and a second cutting surface of the magnetic core slice with magnetic powder, and performing compression molding to form a first magnetic core and a second magnetic core, wherein the first magnetic core is embedded in the first conductive connecting wire, and the second magnetic core is embedded in the second conductive connecting wire;
(5) punching a position, corresponding to the electrode lead, on the first magnetic core until a first conductive connecting wire on the electrode lead is exposed to form an electrode hole, and filling a metal material in the electrode hole;
(6) metallizing positions, corresponding to the first electrode area and the second electrode area, on the first magnetic core respectively to form electrode plates;
(7) and dividing the magnetic core slice according to the array units to obtain at least one inductance unit.
2. The method for preparing the inductor according to claim 1, wherein the step (3) is specifically as follows:
connecting an electrode lead of a first electrode area in the same array unit with a coil lead close to the first electrode area in the first coil area by using a first conductive connecting wire on a first cutting surface of the magnetic core slice, connecting a coil lead close to a second electrode area in the second coil area in the same array unit with an electrode lead of the second electrode area, and carrying out staggered connection on other coil leads of the first coil area and other coil leads of the second coil area in the same array unit in a one-to-one correspondence manner according to a linear arrangement sequence;
and connecting the coil conducting wires of the first coil area and the coil conducting wires of the second coil area in the same array unit in a one-to-one correspondence mode according to a linear arrangement sequence by using a second conductive connecting wire on a second cutting surface of the magnetic core slice.
3. The method for preparing an inductor according to claim 1, wherein in the step (4), the pressing pressure in the pressing is 30-300MPa, and the pressing temperature is 150-300 ℃.
4. The method for preparing the inductor according to claim 1, wherein in the step (5), the filling of the metal material in the electrode hole is specifically: forming an electroplating metal layer by a metal electroplating process, and filling the electrode hole; or, the electrode hole is filled by printing metal paste.
5. The method of claim 4, wherein the metal paste is a mixed paste of a metal powder and a binder, the metal powder includes at least one of copper powder, nickel powder, silver powder, and gold powder, and the binder includes at least one of acrylic resin, epoxy resin, and phenolic resin.
6. The method for manufacturing an inductor according to claim 1, wherein an insulating layer is provided on the surfaces of the coil wire and the electrode wire; and the surfaces of the first conductive connecting wire and the second conductive connecting wire, which are not contacted with the coil lead and the electrode lead, are provided with insulating layers.
7. The method of claim 1, wherein the coil wire is flat, and the width of the coil wire is 0.05-0.5mm and the thickness of the coil wire is 0.02-0.2 mm.
8. The method of claim 1, wherein the electrode lead is flat, and has a width of 0.1 to 0.8mm and a thickness of 0.02 to 0.4 mm.
9. The method for manufacturing an inductor according to claim 1, wherein the electrode sheet has a square cross-sectional shape, a width of 0.05 to 2.0mm, and a thickness of 0.02 to 0.2 mm.
10. An inductor, characterized in that it is obtained by a method for manufacturing an inductor according to any one of claims 1 to 9.
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