CN105355409B - A kind of manufacture method of surface mounting inductor - Google Patents
A kind of manufacture method of surface mounting inductor Download PDFInfo
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- CN105355409B CN105355409B CN201510794263.9A CN201510794263A CN105355409B CN 105355409 B CN105355409 B CN 105355409B CN 201510794263 A CN201510794263 A CN 201510794263A CN 105355409 B CN105355409 B CN 105355409B
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Abstract
The invention discloses a kind of manufacture method of surface mounting inductor, this method prepares inductance main body first, then the surface at other positions to inductance main body in addition to electrode portion carries out insulation processing, pre-treatment is carried out to the electrode portion of inductance main body again, and remove the insulating barrier of the end of two leads of inductance main body coil, then use in physical vapour deposition (PVD), chemical vapor deposition, plating and chemical plating process and a kind of deposit one or more layers metal conducting layer on the electrode portion surface of inductance main body, the metal conducting layer is electrode, obtains surface mounting inductor；Advantage is to form electrode using electro-deposition mode, electrode is directly in the electrode portion growth shaping of inductance main body, it is deposited directly to during electrode moulding on the end of coil lead, it is to be connected by interatomic combination between electrode and lead, being integrally connected property between coil lead and electrode is very high, thus the D.C. resistance between the lead of coil and electrode is greatly reduced, makes that the D.C. resistance in surface mounting inductor between lead and electrode is smaller, and performance is higher.
Description
Technical field
The present invention relates to a kind of surface mounting inductor technology of preparing, more particularly, to a kind of system of surface mounting inductor
Make method.
Background technology
Inductance is one of three big passive device of electronic circuit, primarily serves filtering, vibration, delay, trap, sieve in circuit
Signal is selected, cross noise filtering, stabling current and suppresses the effect such as Electromagnetic Interference.With the fast development of electronics technology, it is particularly
The quick popularization of mobile class consumer electronics terminal, inductance component is to miniaturization, lightening, high frequency, high current, high efficiency, low
The directions such as EMI are developed, and surface mounting inductor, which achieves, to be widely applied.
Existing surface mounting inductor mainly includes inductance main body and is coated on two electrodes at inductance main body both ends, I
The position that inductance main body both ends contact with electrode is referred to as electrode portion, inductance main body includes matrix and be arranged on prepared by magnetic
The coil of intrinsic silicon, the end of two leads of coil is exposed at the electrode portion of inductance main body respectively, when electricity is installed on surface
After the completion of prepared by sensor, the end of two electrodes and two leads connects one to one.
At present, the manufacture method of surface mounting inductor generally includes two steps：The step of preparing inductance main body and
The step of electrode is set in inductance main body.In the manufacture method of existing surface mounting inductor, electricity is set in inductance main body
The step of pole, wherein welding procedure mainly passed through welding by electrode and inductance main body mainly using welding and holding money kind technique
Connection；End silver process is that conductive silver paste is coated in the electrode portion of inductance main body and connects the end of coil lead, then
Electrode is formed by low temperature degumming.Described in Publication No. CN202183292 Chinese patent it is a kind of by coil lead with
The technique that electrode directly welds, the technique manufacture difficulty is larger, and the temperature and time control to welding is very strict, if time mistake
It is long or temperature is too high is responsible for coil outer organic insulation damage layer, and then whole inductance is failed, and the technique
When preparing inductance of the specification below 2016, due to electrode and coil line footpath, all very tiny (effective area is in 0.02 square of milli
Rice is following), this significantly increases the control of welding parameter, therefore the technique is not used to prepare electricity of the specification below 2016
Sense.A kind of end silver process of Publication No. CN103366947 Introduction To Cn Patent, end silver process are real relative to welding procedure
Substantially reduced in existing difficulty, and be applicable to the inductance element of different volumes.End silver process turns into current surface mount inductors
The technique mainly used in device manufacture method, but problems be present in the surface mounting inductor for using end silver process to prepare：
Silver paste is formed by the modulation of silver powder and organic matter, it is necessary to could be discharged organic matter by high temperature sintering, and inductance element because
There is the coil of enamel-covered wire coiling inside, therefore can not use the technique of high temperature sintering, although having developed at present at 250 DEG C or so
Can degumming silver paste, thus the but discharge of organic matter and insufficient necessarily contains a small amount of organic matter in electrode, and a small amount of organic matter
Presence can cause D.C. resistance (R between the lead of coil and electrodeDC) bigger, the resistance of surface mounting inductor is significantly
Degree rise, influence the performance of surface mounting inductor.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of manufacture method of surface mounting inductor, the preparation method
D.C. resistance between the lead and electrode of the surface mounting inductor coil of preparation is smaller, and performance is higher.
Technical scheme is used by the present invention solves above-mentioned technical problem：A kind of manufacturer of surface mounting inductor
Method, comprise the following steps：
1. prepare inductance main body；
2. insulation processing is carried out to the surface at other positions of the inductance main body in addition to electrode portion；
3. pre-treatment is carried out to the electrode portion of inductance main body, and remove the end of two leads of inductance main body coil
Insulating barrier；
4. using a kind of in physical vapour deposition (PVD), chemical vapor deposition, plating and chemical plating process in inductance main body
Electrode portion surface deposits one or more layers metal conducting layer, and the metal conducting layer is electrode, obtains surface mounting inductor.
Described step 1. in prepare concretely comprising the following steps for inductance main body：
1. the enamel-covered wire with self-adhesive layer according to design specification, is coiled into air core coil of the both ends with lead by -1；
1. -2 are included pedestal and are arranged on described pedestal and between array using magnetic manufacture base, described base
N number of boss or N number of groove every arrangement, N are the integer more than or equal to 2；
1. -3 assembling air core coils and base：N number of air core coil is corresponded and is enclosed on N number of outside the boss or by N number of sky
Wire-core coil is corresponded and is placed within N number of groove, obtains the assembly of N number of air core coil and base, N number of air core coil and base
Assembly in N number of air core coil also arranged into array-like, there is a segment distance between two neighboring air core coil；
1. -4 are placed in the assembly of N number of air core coil and base within the die cavity of cold stamping die, magnetic is inserted into die cavity
Cold pressing treatment is carried out after powder, obtains inductance main body just base；
1. -5 base at the beginning of inductance main body is transferred in hot pressing die carry out successively hot-pressing processing and pressurize processing, obtain inductance
Main body green compact；
1. -6 are heat-treated inductance main body green compact, inductance main body blank is obtained；
1. -7 are cut the array that inductance main body blank is lined up according to N number of air core coil, N number of built-in tubular wire is obtained
The inductance main body of circle, the lead at air core coil both ends is exposed in each inductance main body；Prepared first in this method air core coil and
Base, N number of boss or N number of recessed that base includes pedestal and is arranged on pedestal and arranged into array spacings are manufactured using magnetic
Groove, N are the integer more than or equal to 2；Then N number of air core coil is corresponded and is enclosed on N number of outside the boss or by N number of air core coil
One-to-one corresponding is placed within N number of groove, obtains the assembly of N number of air core coil and base, now by N number of air core coil and bottom
The assembly of seat is placed within the die cavity of mould carries out cold pressing and hot-forming, thus base and inductance master at the beginning of inductance main body successively
In body green compact forming process, more inductor combinations are molded together, now mould cavity size increases exponentially, product into
During type, the size of die cavity and upper low punch will increase exponentially, and can reduce mould difficulty of processing, and extend the mold use life-span
With the manufacture efficiency for improving inductor product, and percent defective is relatively low, and production cost is relatively low.
The particle diameter of described magnetic is 65~250 microns, and described magnetic is soft between 1 micron~50 microns by particle diameter
Magnetic material powder is prepared, and described soft magnetic powder is carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder
End, iron nickel by powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and one kind in iron based nano crystal powder or at least
Two kinds of mixture.
The preparation process of described magnetic is：
A. soft magnetic powder is weighed, the quality of soft magnetic powder is designated as M, unit is gram；
B. the chemical pure phosphoric acid that quality is (0.1%~2.5%) * M gram and quality is (2%~20%) * M gram third is weighed
Ketone, chemical pure phosphoric acid and acetone are mixed and stirred for uniformly, obtaining to the mixture of chemical pure phosphoric acid and acetone；
C. the mixture of chemical pure phosphoric acid and acetone is added into stirring in soft magnetic powder and, to drying, obtains the first powder
Mixture；
D. the epoxy resin that quality is (0.5%~5%) * M gram and quality is (2%~20%) * M gram third is weighed again
Ketone, epoxy resin and acetone are mixed and stirred for uniformly, obtaining to the mixture of epoxy resin and acetone；
E. the mixture of epoxy resin and acetone is added in the first mixture of powders and stirred, obtained the second powder and mix
Compound；
F. the second mixture of powders is granulated using Granulation Equipments, obtains the magnetic half that particle diameter is 65~250 microns
Finished product；
G. magnetic semi-finished product are subjected to drying and processing, drying and processing temperature is 80 DEG C~120 DEG C, and the time is 1 hour；
H. it is (0.5%~3.0%) * M gram to weigh quality, zinc stearate powder of the particle diameter below 5 microns, by stearic acid
Stirred 1 hour in the magnetic semi-finished product that zinc powder is added after drying, obtain magnetic finished product.In this method, magnetic has saturation magnetic
The features such as sense is big, magnetic conductivity is high, insulation effect is good and mobility is good, the surface mounting inductor prepared using it as raw material has
Frequency of use is high, operating current is big, caloric value and the low advantage of loss.
Described air core coil is formed using Alpha's mode coiling, and the inner ring of described air core coil is circular or oval
Shape, the lead at described air core coil both ends and its angle drawn between end face are 15 °~135 °.It is hollow in this method
Two leads of coil are drawn on the outside of coil, on the premise of the same number of turn of coiling, can reduce coil height, and then drop
The height of low surface mounting inductor, and when the angle formed between coil lead and extraction end face is acute angle or obtuse angle, cut
Its sectional area will increase after cutting, and then increase the contact area of lead and subsequent electrode, so as to reduce surface mounting inductor
D.C. resistance.
When the inner ring of described air core coil is circle, described base include pedestal and be arranged on described pedestal and
Into array spacings arrangement N number of boss when, described boss is that cross section is circular cylinder, and the height of described boss is
0.2 times of described air core coil axial height~1.2 times, the internal diameter of a diameter of described air core coil of described boss
0.6~0.95 times；
When the inner ring of described air core coil is ellipse, described base includes pedestal and is arranged on described pedestal
And into array spacings arrangement N number of boss when, described boss be cross section be ellipse cylindricality, the height of described boss
For 0.2 times~1.2 times of described air core coil axial height, the length of a diameter of described air core coil of length of described boss
0.6~0.95 times of internal diameter, 0.6~0.95 times of the short internal diameter of short a diameter of described air core coil of described boss；
When the inner ring of described air core coil is circle, described base include pedestal and be arranged on described pedestal and
Into array spacings arrangement N number of groove when, described groove is that cross section is circular cylinder shape groove, described groove it is straight
Footpath is 1.05~1.5 times of the external diameter of described air core coil；
When the inner ring of described air core coil is ellipse, described base includes pedestal and is arranged on described pedestal
And into array spacings arrangement N number of groove when, described groove be cross section be ellipse cylindrical groove, described groove
1.05~1.5 times of the long external diameter of long a diameter of described air core coil, short a diameter of described tubular wire of described groove
1.05~1.5 times of the short external diameter of circle；In this method, by advance comprising boss, increase surface mounting inductor coil inside
The density of plug, improve the inductance value of surface mounting inductor；Elliptical coil increases the area of coil inside plug, improves surface
The inductance value of inductor is installed.
The sticking temperature of the self-adhesive layer of described enamel-covered wire is 80 DEG C~220 DEG C, and the temperature resistant grade of described enamel-covered wire is
155 DEG C~255 DEG C.
The temperature of described cold pressing treatment is not higher than 50 DEG C, and the temperature of described hot-pressing processing is 80 DEG C~250 DEG C, described
Pressurize processing time be 10 seconds~300 seconds, the temperature of described heat treatment is 150 DEG C~250 DEG C, described heat treatment time
For 30 minutes~300 minutes.In this method, magnetic has certain mobility and good compressibility at 80~250 DEG C, then
Green density can be increased by applying certain pressure, and then play the adhesion of magnet and raising in enhancing surface mounting inductor
The effect of the inductance value of surface mounting inductor.
Described cutting mode is wire cutting mode or blade cutting mode, air core coil both ends in each inductance main body
Lead directly make its exposed by cutting mode or make its exposed by lapping mode after dicing.Which can improve
Surface mounting inductor manufacture efficiency and product qualification rate, reduce manufacturing cost.
Compared with prior art, the advantage of the invention is that passing through other positions to inductance main body in addition to electrode portion
Surface carries out insulation processing, then carries out pre-treatment to the electrode portion of inductance main body, and remove inductance main body coil two draw
The insulating barrier of the end of line, then existed using one kind in physical vapour deposition (PVD), chemical vapor deposition, plating and chemical plating process
The electrode portion surface of inductance main body deposits one or more layers metal conducting layer, and the metal conducting layer is electrode, obtains surface peace
Inductor is filled, wherein, using these electro-deposition modes of physical vapour deposition (PVD), chemical vapor deposition, plating or chemical plating process
Deposition forms electrode, and electrode is directly deposited directly to coil during the electrode portion growth shaping of inductance main body, electrode moulding
It is to be connected by interatomic combination on the end of lead, between electrode and lead, the connection between coil lead and electrode
Integraty is very high, thus greatly reduces the D.C. resistance between the lead of coil and electrode, makes to draw in surface mounting inductor
D.C. resistance between line and electrode is smaller, and performance is higher.
Brief description of the drawings
Fig. 1 is the structure chart of the air core coil of the manufacture method of the surface mounting inductor of the present invention；
Fig. 2 is the structure chart of the base of the manufacture method of the surface mounting inductor of the present invention；
Fig. 3 be the present invention surface mounting inductor manufacture method air core coil and base assembly structure
Figure；
Fig. 4 is that the air core coil of the manufacture method of the surface mounting inductor of the present invention and the assembly of base load cold pressing
Sectional view in mould；
Fig. 5 is sectional views of the Fig. 4 along A-A directions；
Fig. 6 is that the air core coil of the manufacture method of the surface mounting inductor of the present invention and the assembly of base load cold pressing
The state diagram of magnetic is inserted after in mould；
Fig. 7 is the schematic diagram that inductance main body green compact are prepared in the manufacture method of the surface mounting inductor of the present invention；
Fig. 8 is cutting technique schematic diagram in the manufacture method of the surface mounting inductor of the present invention；
Fig. 9 be the present invention surface mounting inductor manufacture method in inductance main body structure chart；
Figure 10 be the present invention surface mounting inductor manufacture method in surface mounting inductor structure chart.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment one：As illustrated, a kind of manufacture method of surface mounting inductor, comprises the following steps：
1. according to design specification, the enamel-covered wire with self-adhesive layer is coiled into air core coil 1 of the both ends with lead 11；Enamel-cover
The sticking temperature of the self-adhesive layer of line is 80 DEG C~220 DEG C, and the temperature resistant grade of enamel-covered wire is 155 DEG C~255 DEG C.
2. using magnetic manufacture base, base includes pedestal 2 and setting on the base 2 and arranged into array spacings N number of
Boss 3 or N number of groove, N are the integer more than or equal to 2；
3. assemble air core coil 1 and base：N number of air core coil 1 is corresponded and is enclosed on the outside of N number of boss 3 or by N number of sky
Wire-core coil 1 is corresponded and is placed within N number of groove, obtains the assembly of N number of air core coil 1 and base, N number of air core coil 1 and
N number of air core coil 1 also arranges into array-like in the assembly of base, has a segment distance between two neighboring air core coil 1；
4. the assembly of N number of air core coil 1 and base is placed within the die cavity 4 of cold stamping die, magnetic is inserted into die cavity
Cold pressing treatment is carried out after powder 5, obtains inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C；
Hot-pressing processing and pressurize processing are carried out successively 5. base at the beginning of inductance main body is transferred in hot pressing die, obtain inductance master
Body green compact, the temperature of hot-pressing processing is 80 DEG C~250 DEG C, and pressurize processing time is 10 seconds~300 seconds；
6. inductance main body green compact are heat-treated, inductance main body blank 6 is obtained, the temperature of heat treatment is 150 DEG C~250
DEG C, heat treatment time is 30 minutes~300 minutes.
7. the array that inductance main body blank 6 is lined up according to N number of air core coil 1 is cut, N number of built-in tubular wire is obtained
The inductance main body 7 of circle 1, the lead 11 at the both ends of air core coil 1 is exposed in each inductance main body 7, and cutting mode is wire cutting mode
Or blade cutting mode, the lead 11 at the both ends of air core coil 1 directly makes its exposed by cutting mode in each inductance main body 7
Or make its exposed by lapping mode after dicing；
8. insulation processing is carried out to the surface at other positions of the inductance main body 7 in addition to electrode portion；
9. pre-treatment is carried out to the electrode portion of inductance main body 7, and remove two leads 11 of the coil 1 of inductance main body 7
The insulating barrier of end；
10. one or more layers metal conducting layer is deposited on the electrode portion surface of inductance main body 7 using physical vapour deposition (PVD), should
Metal conducting layer is electrode 8, and the electrode 8 at the both ends of inductance main body 7 corresponds with the exposed lead 11 in the both ends of inductance main body 7 leads
It is logical, obtain surface mounting inductor.
Embodiment two：As illustrated, a kind of manufacture method of surface mounting inductor, comprises the following steps：
1. according to design specification, the enamel-covered wire with self-adhesive layer is coiled into air core coil 1 of the both ends with lead 11；Enamel-cover
The sticking temperature of the self-adhesive layer of line is 80 DEG C~220 DEG C, and the temperature resistant grade of enamel-covered wire is 155 DEG C~255 DEG C.
2. using magnetic manufacture base, base includes pedestal 2 and setting on the base 2 and arranged into array spacings N number of
Boss 3 or N number of groove, N are the integer more than or equal to 2；
3. assemble air core coil 1 and base：N number of air core coil 1 is corresponded and is enclosed on the outside of N number of boss 3 or by N number of sky
Wire-core coil 1 is corresponded and is placed within N number of groove, obtains the assembly of N number of air core coil 1 and base, N number of air core coil 1 and
N number of air core coil 1 also arranges into array-like in the assembly of base, has a segment distance between two neighboring air core coil 1；
4. the assembly of N number of air core coil 1 and base is placed within the die cavity 4 of cold stamping die, magnetic is inserted into die cavity
Cold pressing treatment is carried out after powder 5, obtains inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C；
Hot-pressing processing and pressurize processing are carried out successively 5. base at the beginning of inductance main body is transferred in hot pressing die, obtain inductance master
Body green compact, the temperature of hot-pressing processing is 80 DEG C~250 DEG C, and pressurize processing time is 10 seconds~300 seconds；
6. inductance main body green compact are heat-treated, inductance main body blank 6 is obtained, the temperature of heat treatment is 150 DEG C~250
DEG C, heat treatment time is 30 minutes~300 minutes.
7. the array that inductance main body blank 6 is lined up according to N number of air core coil 1 is cut, N number of built-in tubular wire is obtained
The inductance main body 7 of circle 1, the lead 11 at the both ends of air core coil 1 is exposed in each inductance main body 7, and cutting mode is wire cutting mode
Or blade cutting mode, the lead 11 at the both ends of air core coil 1 directly makes its exposed by cutting mode in each inductance main body 7
Or make its exposed by lapping mode after dicing；
8. insulation processing is carried out to the surface at other positions of the inductance main body 7 in addition to electrode portion；
9. pre-treatment is carried out to the electrode portion of inductance main body 7, and remove two leads 11 of the coil 1 of inductance main body 7
The insulating barrier of end；
10. one or more layers metal conducting layer is deposited on the electrode portion surface of inductance main body 7 using physical vapour deposition (PVD), should
Metal conducting layer is electrode 8, and the electrode 8 at the both ends of inductance main body 7 corresponds with the exposed lead 11 in the both ends of inductance main body 7 leads
It is logical, obtain surface mounting inductor.
In the present embodiment, the particle diameter of magnetic is 65~250 microns, and magnetic is soft between 1 micron~50 microns by particle diameter
Magnetic material powder is prepared, and soft magnetic powder is carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel
Powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and one kind in iron based nano crystal powder or at least two it is mixed
Compound.
Embodiment three：As illustrated, a kind of manufacture method of surface mounting inductor, comprises the following steps：
1. according to design specification, the enamel-covered wire with self-adhesive layer is coiled into air core coil 1 of the both ends with lead 11；Enamel-cover
The sticking temperature of the self-adhesive layer of line is 80 DEG C~220 DEG C, and the temperature resistant grade of enamel-covered wire is 155 DEG C~255 DEG C.
2. using magnetic manufacture base, base includes pedestal 2 and setting on the base 2 and arranged into array spacings N number of
Boss 3 or N number of groove, N are the integer more than or equal to 2；
3. assemble air core coil 1 and base：N number of air core coil 1 is corresponded and is enclosed on the outside of N number of boss 3 or by N number of sky
Wire-core coil 1 is corresponded and is placed within N number of groove, obtains the assembly of N number of air core coil 1 and base, N number of air core coil 1 and
N number of air core coil 1 also arranges into array-like in the assembly of base, has a segment distance between two neighboring air core coil 1；
4. the assembly of N number of air core coil 1 and base is placed within the die cavity 4 of cold stamping die, magnetic is inserted into die cavity
Cold pressing treatment is carried out after powder 5, obtains inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C；
Hot-pressing processing and pressurize processing are carried out successively 5. base at the beginning of inductance main body is transferred in hot pressing die, obtain inductance master
Body green compact, the temperature of hot-pressing processing is 80 DEG C~250 DEG C, and pressurize processing time is 10 seconds~300 seconds；
6. inductance main body green compact are heat-treated, inductance main body blank 6 is obtained, the temperature of heat treatment is 150 DEG C~250
DEG C, heat treatment time is 30 minutes~300 minutes.
7. the array that inductance main body blank 6 is lined up according to N number of air core coil 1 is cut, N number of built-in tubular wire is obtained
The inductance main body 7 of circle 1, the lead 11 at the both ends of air core coil 1 is exposed in each inductance main body 7, and cutting mode is wire cutting mode
Or blade cutting mode, the lead 11 at the both ends of air core coil 1 directly makes its exposed by cutting mode in each inductance main body 7
Or make its exposed by lapping mode after dicing；
8. insulation processing is carried out to the surface at other positions of the inductance main body 7 in addition to electrode portion；
9. pre-treatment is carried out to the electrode portion of inductance main body 7, and remove two leads 11 of the coil 1 of inductance main body 7
The insulating barrier of end；
10. one or more layers metal conducting layer is deposited on the electrode portion surface of inductance main body 7 using physical vapour deposition (PVD), should
Metal conducting layer is electrode 8, and the electrode 8 at the both ends of inductance main body 7 corresponds with the exposed lead 11 in the both ends of inductance main body 7 leads
It is logical, obtain surface mounting inductor.
In the present embodiment, the particle diameter of magnetic is 65~250 microns, and magnetic is soft between 1 micron~50 microns by particle diameter
Magnetic material powder is prepared, and soft magnetic powder is carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel
Powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and one kind in iron based nano crystal powder or at least two it is mixed
Compound.
In the present embodiment, the preparation process of magnetic is：
A. soft magnetic powder is weighed, the quality of soft magnetic powder is designated as M, unit is gram；
B. the chemical pure phosphoric acid that quality is (0.1%~2.5%) * M gram and quality is (2%~20%) * M gram third is weighed
Ketone, chemical pure phosphoric acid and acetone are mixed and stirred for uniformly, obtaining to the mixture of chemical pure phosphoric acid and acetone；
C. the mixture of chemical pure phosphoric acid and acetone is added into stirring in soft magnetic powder and, to drying, obtains the first powder
Mixture；
D. the epoxy resin that quality is (0.5%~5%) * M gram and quality is (2%~20%) * M gram third is weighed again
Ketone, epoxy resin and acetone are mixed and stirred for uniformly, obtaining to the mixture of epoxy resin and acetone；
E. the mixture of epoxy resin and acetone is added in the first mixture of powders and stirred, obtained the second powder and mix
Compound；
F. the second mixture of powders is granulated using Granulation Equipments, obtains the magnetic half that particle diameter is 65~250 microns
Finished product；
G. magnetic semi-finished product are subjected to drying and processing, drying and processing temperature is 80 DEG C~120 DEG C, and the time is 1 hour；
H. it is (0.5%~3.0%) * M gram to weigh quality, zinc stearate powder of the particle diameter below 5 microns, by stearic acid
Stirred 1 hour in the magnetic semi-finished product that zinc powder is added after drying, obtain magnetic finished product.
Example IV：As illustrated, a kind of manufacture method of surface mounting inductor, comprises the following steps：
1. according to design specification, the enamel-covered wire with self-adhesive layer is coiled into air core coil 1 of the both ends with lead 11；Enamel-cover
The sticking temperature of the self-adhesive layer of line is 80 DEG C~220 DEG C, and the temperature resistant grade of enamel-covered wire is 155 DEG C~255 DEG C.
2. using magnetic manufacture base, base includes pedestal 2 and setting on the base 2 and arranged into array spacings N number of
Boss 3 or N number of groove, N are the integer more than or equal to 2；
3. assemble air core coil 1 and base：N number of air core coil 1 is corresponded and is enclosed on the outside of N number of boss 3 or by N number of sky
Wire-core coil 1 is corresponded and is placed within N number of groove, obtains the assembly of N number of air core coil 1 and base, N number of air core coil 1 and
N number of air core coil 1 also arranges into array-like in the assembly of base, has a segment distance between two neighboring air core coil 1；
4. the assembly of N number of air core coil 1 and base is placed within the die cavity 4 of cold stamping die, magnetic is inserted into die cavity
Cold pressing treatment is carried out after powder 5, obtains inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C；
Hot-pressing processing and pressurize processing are carried out successively 5. base at the beginning of inductance main body is transferred in hot pressing die, obtain inductance master
Body green compact, the temperature of hot-pressing processing is 80 DEG C~250 DEG C, and pressurize processing time is 10 seconds~300 seconds；
6. inductance main body green compact are heat-treated, inductance main body blank 6 is obtained, the temperature of heat treatment is 150 DEG C~250
DEG C, heat treatment time is 30 minutes~300 minutes.
7. the array that inductance main body blank 6 is lined up according to N number of air core coil 1 is cut, N number of built-in tubular wire is obtained
The inductance main body 7 of circle 1, the lead 11 at the both ends of air core coil 1 is exposed in each inductance main body 7, and cutting mode is wire cutting mode
Or blade cutting mode, the lead 11 at the both ends of air core coil 1 directly makes its exposed by cutting mode in each inductance main body 7
Or make its exposed by lapping mode after dicing；
8. insulation processing is carried out to the surface at other positions of the inductance main body 7 in addition to electrode portion；
9. pre-treatment is carried out to the electrode portion of inductance main body 7, and remove two leads 11 of the coil 1 of inductance main body 7
The insulating barrier of end；
10. one or more layers metal conducting layer is deposited on the electrode portion surface of inductance main body 7 using physical vapour deposition (PVD), should
Metal conducting layer is electrode 8, and the electrode 8 at the both ends of inductance main body 7 corresponds with the exposed lead 11 in the both ends of inductance main body 7 leads
It is logical, obtain surface mounting inductor.
In the present embodiment, air core coil 1 is formed using Alpha's mode coiling, and the inner ring of air core coil 1 is circular or ellipse
Circle, the lead 11 at the both ends of air core coil 1 and its angle drawn between end face are 15 °~135 °.
Embodiment five：As illustrated, a kind of manufacture method of surface mounting inductor, comprises the following steps：
1. according to design specification, the enamel-covered wire with self-adhesive layer is coiled into air core coil 1 of the both ends with lead 11；Enamel-cover
The sticking temperature of the self-adhesive layer of line is 80 DEG C~220 DEG C, and the temperature resistant grade of enamel-covered wire is 155 DEG C~255 DEG C.
2. using magnetic manufacture base, base includes pedestal 2 and setting on the base 2 and arranged into array spacings N number of
Boss 3 or N number of groove, N are the integer more than or equal to 2；
3. assemble air core coil 1 and base：N number of air core coil 1 is corresponded and is enclosed on the outside of N number of boss 3 or by N number of sky
Wire-core coil 1 is corresponded and is placed within N number of groove, obtains the assembly of N number of air core coil 1 and base, N number of air core coil 1 and
N number of air core coil 1 also arranges into array-like in the assembly of base, has a segment distance between two neighboring air core coil 1；
4. the assembly of N number of air core coil 1 and base is placed within the die cavity 4 of cold stamping die, magnetic is inserted into die cavity
Cold pressing treatment is carried out after powder 5, obtains inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C；
Hot-pressing processing and pressurize processing are carried out successively 5. base at the beginning of inductance main body is transferred in hot pressing die, obtain inductance master
Body green compact, the temperature of hot-pressing processing is 80 DEG C~250 DEG C, and pressurize processing time is 10 seconds~300 seconds；
6. inductance main body green compact are heat-treated, inductance main body blank 6 is obtained, the temperature of heat treatment is 150 DEG C~250
DEG C, heat treatment time is 30 minutes~300 minutes.
7. the array that inductance main body blank 6 is lined up according to N number of air core coil 1 is cut, N number of built-in tubular wire is obtained
The inductance main body 7 of circle 1, the lead 11 at the both ends of air core coil 1 is exposed in each inductance main body 7, and cutting mode is wire cutting mode
Or blade cutting mode, the lead 11 at the both ends of air core coil 1 directly makes its exposed by cutting mode in each inductance main body 7
Or make its exposed by lapping mode after dicing；
8. insulation processing is carried out to the surface at other positions of the inductance main body 7 in addition to electrode portion；
9. pre-treatment is carried out to the electrode portion of inductance main body 7, and remove two leads 11 of the coil 1 of inductance main body 7
The insulating barrier of end；
10. one or more layers metal conducting layer is deposited on the electrode portion surface of inductance main body 7 using physical vapour deposition (PVD), should
Metal conducting layer is electrode 8, and the electrode 8 at the both ends of inductance main body 7 corresponds with the exposed lead 11 in the both ends of inductance main body 7 leads
It is logical, obtain surface mounting inductor.
In the present embodiment, air core coil 1 is formed using Alpha's mode coiling, and the inner ring of air core coil 1 is circular or ellipse
Circle, the lead 11 at the both ends of air core coil 1 and its angle drawn between end face are 15 °~135 °.
In the present embodiment, when the inner ring of air core coil 1 is circle, base includes pedestal 2 and setting on the base 2 and Cheng Zhen
When arranging spaced N number of boss 3, boss 3 is that cross section is circular cylinder, and the height of boss 3 is the axial direction of air core coil 1
0.2 times of height~1.2 times, 0.6~0.95 times of the internal diameter of a diameter of air core coil 1 of boss 3；When in air core coil 1
Enclose as ellipse, base include pedestal 2 and set on the base 2 and into array spacings arrangement N number of boss 3 when, boss 3 is horizontal stroke
Section is the cylindricality of ellipse, and the height of boss 3 is 0.2 times~1.2 times of the axial height of air core coil 1, the long diameter of boss 3
For 0.6~0.95 times of the long internal diameter of air core coil 1, the 0.6~0.95 of the short internal diameter of short a diameter of air core coil 1 of boss 3
Times；When the inner ring of air core coil 1 is circle, base includes pedestal 2 and setting on the base 2 and arranged into array spacings N number of
During groove, groove is that cross section is circular cylinder shape groove, the 1.05~1.5 of the external diameter of a diameter of air core coil 1 of groove
Times；When the inner ring of air core coil 1 is ellipse, base includes the N that pedestal 2 and setting arrange on the base 2 and into array spacings
During individual groove, groove be cross section be ellipse cylindrical groove, the 1.05 of the long external diameter of a diameter of air core coil 1 of length of groove
~1.5 times, 1.05~1.5 times of the short external diameter of short a diameter of air core coil 1 of groove.
Claims (6)
1. a kind of manufacture method of surface mounting inductor, it is characterised in that comprise the following steps：
1. prepare inductance main body；
2. insulation processing is carried out to the surface at other positions of the inductance main body in addition to electrode portion；
3. carrying out pre-treatment to the electrode portion of inductance main body, and remove the insulation of the end of two leads of inductance main body coil
Layer；
4. using a kind of electrode in inductance main body in physical vapour deposition (PVD), chemical vapor deposition, plating and chemical plating process
Portion surface deposits one or more layers metal conducting layer, and the metal conducting layer is electrode, obtains surface mounting inductor；
Described step 1. in prepare concretely comprising the following steps for inductance main body：
1. the enamel-covered wire with self-adhesive layer according to design specification, is coiled into air core coil of the both ends with lead by -1；
1. -2 using magnetic manufacture base, described base includes pedestal and is arranged on described pedestal and is arranged into array spacings
The N number of boss or N number of groove of row, N are the integer more than or equal to 2；
1. -3 assembling air core coils and base：N number of air core coil is corresponded and is enclosed on N number of outside the boss or by N number of tubular wire
Circle one-to-one corresponding is placed within N number of groove, obtains the assembly of N number of air core coil and base, the dress of N number of air core coil and base
N number of air core coil also arranges into array-like in part, has a segment distance between two neighboring air core coil；
1. -4 are placed in the assembly of N number of air core coil and base within the die cavity of cold stamping die, after inserting magnetic into die cavity
Cold pressing treatment is carried out, obtains inductance main body just base；
1. -5 base at the beginning of inductance main body is transferred in hot pressing die carry out successively hot-pressing processing and pressurize processing, obtain inductance main body
Green compact；
1. -6 are heat-treated inductance main body green compact, inductance main body blank is obtained；
1. -7 are cut the array that inductance main body blank is lined up according to N number of air core coil, N number of built-in air core coil is obtained
Inductance main body, the lead at air core coil both ends is exposed in each inductance main body；
Described air core coil is formed using Alpha's mode coiling, and the inner ring of described air core coil is circular or ellipse,
The lead at described air core coil both ends and its angle drawn between end face are 15 °~135 °；
When the inner ring of described air core coil is circle, described base includes pedestal and is arranged on described pedestal and Cheng Zhen
When arranging spaced N number of boss, described boss is that cross section is circular cylinder, and the height of described boss is described
0.2 times~1.2 times of air core coil axial height, the 0.6 of the internal diameter of a diameter of described air core coil of described boss
~0.95 times；
When the inner ring of described air core coil is ellipse, described base include pedestal and be arranged on described pedestal and into
During N number of boss of array spacings arrangement, described boss is the cylindricality that cross section is ellipse, and the height of described boss is institute
0.2 times of the air core coil axial height stated~1.2 times, the long internal diameter of a diameter of described air core coil of length of described boss
0.6~0.95 times, 0.6~0.95 times of the short internal diameter of short a diameter of described air core coil of described boss；
When the inner ring of described air core coil is circle, described base includes pedestal and is arranged on described pedestal and Cheng Zhen
When arranging spaced N number of groove, described groove is that cross section is circular cylinder shape groove, described groove it is a diameter of
1.05~1.5 times of the external diameter of described air core coil；
When the inner ring of described air core coil is ellipse, described base include pedestal and be arranged on described pedestal and into
During N number of groove of array spacings arrangement, described groove is the cylindrical groove that cross section is ellipse, and the length of described groove is straight
Footpath is 1.05~1.5 times of the long external diameter of described air core coil, short a diameter of described air core coil of described groove
1.05~1.5 times of short external diameter.
2. the manufacture method of a kind of surface mounting inductor according to claim 1, it is characterised in that described magnetic
Particle diameter is 65~250 microns, and described magnetic is prepared by soft magnetic powder of the particle diameter between 1 micron~50 microns,
Described soft magnetic powder is carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel by powder, iron nickel molybdenum powder
End, iron sial powder, iron-based amorphous powder and one kind or at least two mixture in iron based nano crystal powder.
3. the manufacture method of a kind of surface mounting inductor according to claim 2, it is characterised in that described magnetic
Preparation process is：
A. soft magnetic powder is weighed, the quality of soft magnetic powder is designated as M, unit is gram；
B. the chemical pure phosphoric acid that quality is (0.1%~2.5%) * M gram and the acetone that quality is (2%~20%) * M gram are weighed,
Chemical pure phosphoric acid and acetone are mixed and stirred for uniformly, obtaining to the mixture of chemical pure phosphoric acid and acetone；
C. the mixture of chemical pure phosphoric acid and acetone is added into stirring in soft magnetic powder and, to drying, obtains the mixing of the first powder
Thing；
D. the epoxy resin that quality is (0.5%~5%) * M gram and the acetone that quality is (2%~20%) * M gram are weighed again, will
Epoxy resin and acetone are mixed and stirred for uniformly, obtaining the mixture of epoxy resin and acetone；
E. the mixture of epoxy resin and acetone is added in the first mixture of powders and stirred, obtain the mixing of the second powder
Thing；
F. the second mixture of powders is granulated using Granulation Equipments, obtains the magnetic semi-finished product that particle diameter is 65~250 microns；
G. magnetic semi-finished product are subjected to drying and processing, drying and processing temperature is 80 DEG C~120 DEG C, and the time is 1 hour；
H. it is (0.5%~3.0%) * M gram to weigh quality, zinc stearate powder of the particle diameter below 5 microns, by Zinc stearate powder
Stirred 1 hour in the magnetic semi-finished product that end is added after drying, obtain magnetic finished product.
A kind of 4. manufacture method of surface mounting inductor according to claim 1, it is characterised in that described enamel-covered wire
The sticking temperature of self-adhesive layer be 80 DEG C~220 DEG C, the temperature resistant grade of described enamel-covered wire is 155 DEG C~255 DEG C.
5. the manufacture method of a kind of surface mounting inductor according to claim 1, it is characterised in that at described cold pressing
The temperature of reason is not higher than 50 DEG C, and the temperature of described hot-pressing processing is 80 DEG C~250 DEG C, and described pressurize processing time is 10 seconds
~300 seconds, the temperature of described heat treatment was 150 DEG C~250 DEG C, and described heat treatment time is 30 minutes~300 minutes.
A kind of 6. manufacture method of surface mounting inductor according to claim 1, it is characterised in that described cutting side
Formula is wire cutting mode or blade cutting mode, and the lead at air core coil both ends is straight by cutting mode in each inductance main body
Connecing makes its exposed or makes its exposed by lapping mode after dicing.
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| CN105895290B (en) * | 2016-04-27 | 2018-03-09 | 横店集团东磁股份有限公司 | A kind of high temperature resistant magnetic preparation method |
| TWI640023B (en) * | 2017-09-26 | 2018-11-01 | 綠點高新科技股份有限公司 | A method for making an inductor and the product made therefrom |
| KR102004811B1 (en) | 2018-01-17 | 2019-07-29 | 삼성전기주식회사 | Inductor |
| CN109285682A (en) * | 2018-08-24 | 2019-01-29 | 横店集团东磁股份有限公司 | Iron silicochromium material preparation method and integrated inductor magnetic core for integrated inductor |
| CN109166717B (en) * | 2018-09-03 | 2020-03-20 | 横店集团东磁股份有限公司 | Integrally-formed inductor forming method |
| CN109360731A (en) * | 2018-12-03 | 2019-02-19 | 东莞市高东电子科技有限公司 | A kind of integrated inductance production method and the inductance using this method production |
| CN110098042A (en) * | 2019-03-21 | 2019-08-06 | 深圳华络电子有限公司 | A kind of manufacture craft of midget inductor |
| US20200303114A1 (en) * | 2019-03-22 | 2020-09-24 | Cyntec Co., Ltd. | Inductor array in a single package |
| CN112164570A (en) * | 2020-10-19 | 2021-01-01 | 湖南创一电子科技股份有限公司 | Preparation method of metal magnetic powder core integrated chip inductor |
| CN112655060B (en) * | 2020-11-17 | 2024-04-12 | 深圳顺络电子股份有限公司 | Integrally formed inductor and manufacturing method thereof |
| CN113178316A (en) * | 2021-04-12 | 2021-07-27 | 创一科技(长沙)有限公司 | High-power large-current integrally-formed inductor with electrodes metallized by electroplating |
| CN114843098A (en) * | 2022-05-27 | 2022-08-02 | 张灵波 | Method for manufacturing surface-mounted inductor |
| CN117038298B (en) * | 2023-08-23 | 2024-02-20 | 东莞市三体微电子技术有限公司 | Isolation type inductance row and manufacturing method thereof |
| CN117423541A (en) * | 2023-11-27 | 2024-01-19 | 英麦科（厦门）微电子科技有限公司 | Manufacturing method of thin film inductor |
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| CN103050224A (en) * | 2012-12-26 | 2013-04-17 | 王向群 | Power inductor and manufacturing method thereof |
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