CN105355409A - Surface mounting inductor manufacture method - Google Patents
Surface mounting inductor manufacture method Download PDFInfo
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- CN105355409A CN105355409A CN201510794263.9A CN201510794263A CN105355409A CN 105355409 A CN105355409 A CN 105355409A CN 201510794263 A CN201510794263 A CN 201510794263A CN 105355409 A CN105355409 A CN 105355409A
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Abstract
The invention discloses a surface mounting inductor manufacture method comprising the following steps: firstly preparing an inductor body; carrying out insulation treatment for the surface of the inductor body besides an electrode portion; pre-processing the electrode portion of the inductor body; removing an insulation layer on end portions of two lead wires of a coil in the inductor body; depositing one or more layers of metal conductive layers on the surface of the electrode portion of the inductor body through either a physics vapour deposition technology, or chemical vapor deposition or electroplate and chemical plating technology, the metal conductive layers are the electrode, thus obtaining the surface mounting inductor; the advantages are that the electrode position mode is employed to form the electrode, the electrode can directly grow into form on the electrode portion of the inductor body, and the electrode can be directly deposited on the end portion of the lead wires of the coil in a forming process; the electrode and the lead wires are connected through atom combination so as to provide high connecting integration, thus greatly reducing DC resistance between the lead wires of the coil and the electrode; the DC resistance between the lead wires of the coil and the electrode is relatively small, so the performance of the surface mounting inductor is high.
Description
Technical field
The present invention relates to a kind of surface mounting inductor technology of preparing, especially relate to a kind of manufacture method of surface mounting inductor.
Background technology
Inductance is one of large passive device of electronic circuit three, mainly plays filtering, vibration, delay, trap, screening signal, filtered noise, stabling current in circuit and suppresses the effects such as Electromagnetic Interference.Along with the fast development of electronics technology, particularly move the universal fast of class consumer electronics terminal, inductance component is to the future development such as miniaturized, lightening, high frequency, big current, high efficiency, low EMI, and surface mounting inductor achieves to be applied widely.
Existing surface mounting inductor mainly comprises inductance main body and is coated on two electrodes at inductance main body two ends, the position of inductance main body two ends and electrode contact is called electrode section by us, inductance main body comprises matrix prepared by magnetic and the coil being arranged on intrinsic silicon, the end of two lead-in wires of coil is exposed from the electrode section of inductance main body respectively, after prepared by surface mounting inductor, two electrodes and two ends gone between have connected one to one.
At present, the manufacture method of surface mounting inductor generally includes two steps: prepare the step of inductance main body and in inductance main body, arrange the step of electrode.In the manufacture method of existing surface mounting inductor, the step that inductance main body arranges electrode mainly adopts welding and end money kind technique, and wherein electrode is mainly connected with inductance main body by welding by welding procedure; End silver process be conductive silver paste is coated in inductance main body electrode section on and the end of connecting coil lead-in wire, then come unstuck by low temperature and form electrode.Publication number is describe a kind of technique of coil lead and electrode directly being welded in the Chinese patent of CN202183292, this technique manufacture difficulty is larger, control very strict to the temperature and time of welding, if overlong time or temperature is too high evenly can cause coil outer organic insulation damage layer, and then whole inductance was lost efficacy, and this technique when preparing the inductance of specification below 2016, due to electrode and coil wire diameter all very tiny (effective area is below 0.02 square millimeter), this significantly increases the control of welding parameter, therefore this technique cannot for the preparation of the inductance of specification below 2016.Publication number a kind of end silver process that has been the Introduction To Cn Patent of CN103366947, end silver process, relative to welding procedure, realizes difficulty reduces greatly, and is applicable to the inductance element of different volumes.End silver process has become the main technique used in current surface mounting inductor manufacture method, but there is following problem in the surface mounting inductor adopting end silver process to prepare: silver slurry is modulated by silver powder and organic substance to form, need organic substance to be discharged by high temperature sintering, and inductance element is because the inner coil having enamelled wire coiling, therefore the technique of high temperature sintering can not be used, although developed the silver slurry that can come unstuck at about 250 DEG C at present, but organic discharge is also insufficient, a small amount of organic substance must be contained thus in electrode, and a small amount of organic existence can cause the D.C. resistance (R between the lead-in wire of coil and electrode
dC) larger, the resistance of surface mounting inductor significantly raises, and affects the performance of surface mounting inductor.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of manufacture method of surface mounting inductor, and the D.C. resistance between the lead-in wire of surface mounting inductor coil prepared by this preparation method and electrode is smaller, and performance is higher.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of manufacture method of surface mounting inductor, comprises the following steps:
1. inductance main body is prepared;
2. insulation processing is carried out to the surface at other positions of inductance main body except electrode section;
3. pre-treatment is carried out to the electrode section of inductance main body, and remove the insulating barrier of the end of two lead-in wires of inductance main body coil;
4. adopt a kind of one or more layers metal conducting layer of electrode section surface deposition in inductance main body in physical vapour deposition (PVD), chemical vapour deposition (CVD), plating and chemical plating process, this metal conducting layer is electrode, obtains surface mounting inductor.
Described step 1. in prepare inductance main body concrete steps be:
1.-1 according to design specification, and the enamelled wire with self-adhesive layer is coiled into the air core coil that two ends have lead-in wire;
1.-2 adopt magnetics to manufacture bases, described base comprises pedestal and to be arranged on described pedestal and the N number of boss becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
1.-3 assembling air core coil and bases: N number of air core coil one_to_one corresponding is enclosed within outside N number of boss or N number of air core coil one_to_one corresponding is placed within N number of groove, obtain the assembly of N number of air core coil and base, N number of air core coil also becomes array-like to arrange with N number of air core coil in the assembly of base, has a segment distance between adjacent two air core coils;
1.-4 the assembly of N number of air core coil and base is placed within the die cavity of cold stamping die, insert magnetic in die cavity after, carries out cold pressing treatment, obtain inductance main body just base;
1.-5 by inductance main body just base be transferred in hot pressing die and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact;
1.-6 inductance main body green compact are heat-treated, obtain inductance main body blank;
1.-7 cut by the array that inductance main body blank is lined up according to N number of air core coil, obtain the inductance main body of N number of built-in air core coil, the lead-in wire at each inductance main body hollow core coil two ends exposes, first prepare air core coil in the method and adopt magnetic to manufacture base, base comprises pedestal and to be arranged on pedestal and the N number of boss becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer, then N number of air core coil one_to_one corresponding is enclosed within outside N number of boss or N number of air core coil one_to_one corresponding is placed within N number of groove, obtain the assembly of N number of air core coil and base, now carry out colding pressing with hot-forming within the die cavity assembly of N number of air core coil and base being placed in mould successively, thus in the first base of inductance main body and inductance main body green compact forming process, many bank of inductors are combined shaping, now mould cavity size increases exponentially, product is when shaping, the size of die cavity and upper low punch will increase exponentially, Mould Machining difficulty can be reduced, and extend the manufacture efficiency of mold use life-span and raising inductor product, and percent defective is lower, production cost is lower.
The particle diameter of described magnetic is 65 ~ 250 microns, described magnetic is prepared from by the soft magnetic powder of particle diameter between 1 micron ~ 50 microns, and described soft magnetic powder is the mixture of a kind of in carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel by powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and iron based nano crystal powder or at least two kinds.
The preparation process of described magnetic is:
A. take soft magnetic powder, the quality of soft magnetic powder is designated as M, unit is gram;
B. taking quality for the chemical pure phosphoric acid of (0.1% ~ 2.5%) * M gram and quality is the acetone of (2% ~ 20%) * M gram, chemical pure phosphoric acid and acetone is mixed and stirs, obtaining the mixture of chemical pure phosphoric acid and acetone;
C. the mixture of chemical pure phosphoric acid and acetone is added in soft magnetic powder and be stirred to drying, obtain the first mixture of powders;
D. taking quality again for the epoxy resin of (0.5% ~ 5%) * M gram and quality is the acetone of (2% ~ 20%) * M gram, epoxy resin and acetone is mixed and stirs, 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 stir, obtain the second mixture of powders;
F. utilize Granulation Equipments to carry out granulation to the second mixture of powders, obtain the magnetic semi-finished product that particle diameter is 65 ~ 250 microns;
G. magnetic semi-finished product are carried out drying and processing, drying and processing temperature is 80 DEG C ~ 120 DEG C, and the time is 1 hour;
H. take quality for (0.5% ~ 3.0%) * M gram, the zinc stearate powder of particle diameter below 5 microns, zinc stearate powder is added in the magnetic semi-finished product after oven dry and stir 1 hour, obtain magnetic finished product.In the method, magnetic has that saturated magnetic strength is large, magnetic permeability is high, insulation effect is good and the feature such as mobility is good, and the surface mounting inductor prepared using it as raw material has that frequency of utilization is high, operating current large, caloric value and the advantage such as loss is low.
Described air core coil adopts the coiling of Alpha's mode to form, and the inner ring of described air core coil is circular or oval, and the angle between the lead-in wire at described air core coil two ends and its extraction end face is 15 ° ~ 135 °.In the method, two lead-in wires of air core coil are all drawn outside coil, under the prerequisite of the same number of turn of coiling, coil height can be reduced, and then reduce the height of surface mounting inductor, and when coil lead and draw the angle formed between end face be acute angle or obtuse angle time, cutting afterwards its sectional area will increase, and then increase the contact area of lead-in wire and subsequent electrode, thus reduce the D.C. resistance of surface mounting inductor.
When the inner ring of described air core coil is circular, described base comprise pedestal with to be arranged on described pedestal and the N number of boss becoming array spacings to arrange time, described boss is cross section is the cylindrical of circle, the height of described boss is 0.2 times ~ 1.2 times of described air core coil axial height, and the diameter of described boss is 0.6 ~ 0.95 times of the internal diameter of described air core coil;
When the inner ring of described air core coil is oval, described base comprise pedestal with to be arranged on described pedestal and the N number of boss becoming array spacings to arrange time, described boss is cross section is oval cylindricality, the height of described boss is 0.2 times ~ 1.2 times of described air core coil axial height, the long diameter of described boss is 0.6 ~ 0.95 times of the long internal diameter of described air core coil, and the short diameter of described boss is 0.6 ~ 0.95 times of the short internal diameter of described air core coil;
When the inner ring of described air core coil is circular, described base comprise pedestal with to be arranged on described pedestal and the N number of groove becoming array spacings to arrange time, described groove is cross section is circular cylinder shape groove, and the diameter of described groove 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 oval, described base comprise pedestal with to be arranged on described pedestal and the N number of groove becoming array spacings to arrange time, described groove is cross section is oval cylindrical groove, the long diameter of described groove is 1.05 ~ 1.5 times of the long external diameter of described air core coil, and the short diameter of described groove is 1.05 ~ 1.5 times of the short external diameter of described air core coil; In the method, by shaping boss in advance, increase the density of surface mounting inductor coil inside plug, improve the inductance value of surface mounting inductor; Elliptical coil increases the area of coil inside plug, improves the inductance value of surface mounting inductor.
The sticking temperature of the self-adhesive layer of described enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of described enamelled wire is 155 DEG C ~ 255 DEG C.
The temperature of described cold pressing treatment is not higher than 50 DEG C, the temperature of described hot-pressing processing is 80 DEG C ~ 250 DEG C, the described pressurize processing time is 10 seconds ~ 300 seconds, and described heat treated temperature is 150 DEG C ~ 250 DEG C, and described heat treatment time is 30 minutes ~ 300 minutes.In the method, magnetic has certain mobility and good compressibility at 80 ~ 250 DEG C, apply certain pressure again and can increase green density, and then play the adhesion the effect improving the inductance value of surface mounting inductor that strengthen magnet in surface mounting inductor.
Described cutting mode is Linear cut mode or blade cuts mode, and the lead-in wire at each inductance main body hollow core coil two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing.Which can improve surface mounting inductor and manufacture efficiency and conforming product rate, reduces manufacturing cost.
Compared with prior art, the invention has the advantages that by carrying out insulation processing to the surface at other positions of inductance main body except electrode section, again pre-treatment is carried out to the electrode section of inductance main body, and remove the insulating barrier of the end of two lead-in wires of inductance main body coil, then physical vapour deposition (PVD) is adopted, chemical vapour deposition (CVD), plating and chemical plating process in a kind of one or more layers metal conducting layer of electrode section surface deposition in inductance main body, this metal conducting layer is electrode, obtain surface mounting inductor, wherein, adopt physical vapour deposition (PVD), chemical vapour deposition (CVD), plating or these electro-deposition modes of chemical plating process deposit formation electrode, electrode is directly at the electrode section growth shaping of inductance main body, be deposited directly in electrode moulding process on the end of coil lead, be connected by interatomic combination between electrode with lead-in wire, being integrally connected property between coil lead and electrode is very high, greatly reduce the D.C. resistance between the lead-in wire of coil and electrode thus, make the D.C. resistance in surface mounting inductor between lead-in wire and electrode smaller, performance is higher.
Accompanying drawing explanation
Fig. 1 is the structure chart of the air core coil of the manufacture method of surface mounting inductor of the present invention;
Fig. 2 is the structure chart of the base of the manufacture method of surface mounting inductor of the present invention;
Fig. 3 is the structure chart of the air core coil of the manufacture method of surface mounting inductor of the present invention and the assembly of base;
Fig. 4 is the cutaway view that the air core coil of the manufacture method of surface mounting inductor of the present invention and the assembly of base load in cold stamping die;
Fig. 5 is the cutaway view of Fig. 4 along A-A direction;
Fig. 6 is that the air core coil of the manufacture method of surface mounting inductor of the present invention and the assembly of base load the state diagram inserting magnetic after in cold stamping die;
Fig. 7 is the schematic diagram preparing inductance main body green compact in the manufacture method of surface mounting inductor of the present invention;
Fig. 8 is cutting technique schematic diagram in the manufacture method of surface mounting inductor of the present invention;
Fig. 9 is the structure chart of inductance main body in the manufacture method of surface mounting inductor of the present invention;
Figure 10 is the structure chart of surface mounting inductor in the manufacture method of surface mounting inductor of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one: as shown in the figure, a kind of manufacture method of surface mounting inductor, comprises the following steps:
1. according to design specification, the enamelled wire with self-adhesive layer is coiled into the air core coil 1 that two ends have lead-in wire 11; The sticking temperature of the self-adhesive layer of enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of enamelled wire is 155 DEG C ~ 255 DEG C.
2. adopt magnetic to manufacture base, base comprises pedestal 2 and arranges on the base 2 and the N number of boss 3 becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
3. air core coil 1 and base is assembled: be enclosed within by N number of air core coil 1 one_to_one corresponding outside N number of boss 3 or be placed within N number of groove by N number of air core coil 1 one_to_one corresponding, obtain the assembly of N number of air core coil 1 and base, N number of air core coil 1 also becomes array-like to arrange with air core coil 1 N number of in the assembly of base, has a segment distance between adjacent two air core coils 1;
4. be placed within the die cavity 4 of cold stamping die with the assembly of base by N number of air core coil 1, carry out cold pressing treatment after inserting magnetic 5 in die cavity, obtain inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C;
5. be transferred in hot pressing die by first for inductance main body base and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact, the temperature of hot-pressing processing is 80 DEG C ~ 250 DEG C, and the pressurize processing time is 10 seconds ~ 300 seconds;
6. heat-treated by inductance main body green compact, obtain inductance main body blank 6, heat treated temperature is 150 DEG C ~ 250 DEG C, and 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, obtain the inductance main body 7 of N number of built-in air core coil 1, the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends exposes, cutting mode is Linear cut mode or blade cuts mode, and the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing;
8. insulation processing is carried out to the surface at other positions of inductance main body 7 except electrode section;
9. pre-treatment is carried out to the electrode section of inductance main body 7, and remove the insulating barrier of the end of two lead-in wires 11 of inductance main body 7 coil 1;
10. adopt physical vapour deposition (PVD) at one or more layers metal conducting layer of electrode section surface deposition of inductance main body 7, this metal conducting layer is electrode 8, the lead-in wire 11 one_to_one corresponding conducting that the electrode 8 at inductance main body 7 two ends and inductance main body 7 two ends are exposed, obtains surface mounting inductor.
Embodiment two: as shown in the figure, a kind of manufacture method of surface mounting inductor, comprises the following steps:
1. according to design specification, the enamelled wire with self-adhesive layer is coiled into the air core coil 1 that two ends have lead-in wire 11; The sticking temperature of the self-adhesive layer of enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of enamelled wire is 155 DEG C ~ 255 DEG C.
2. adopt magnetic to manufacture base, base comprises pedestal 2 and arranges on the base 2 and the N number of boss 3 becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
3. air core coil 1 and base is assembled: be enclosed within by N number of air core coil 1 one_to_one corresponding outside N number of boss 3 or be placed within N number of groove by N number of air core coil 1 one_to_one corresponding, obtain the assembly of N number of air core coil 1 and base, N number of air core coil 1 also becomes array-like to arrange with air core coil 1 N number of in the assembly of base, has a segment distance between adjacent two air core coils 1;
4. be placed within the die cavity 4 of cold stamping die with the assembly of base by N number of air core coil 1, carry out cold pressing treatment after inserting magnetic 5 in die cavity, obtain inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C;
5. be transferred in hot pressing die by first for inductance main body base and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact, the temperature of hot-pressing processing is 80 DEG C ~ 250 DEG C, and the pressurize processing time is 10 seconds ~ 300 seconds;
6. heat-treated by inductance main body green compact, obtain inductance main body blank 6, heat treated temperature is 150 DEG C ~ 250 DEG C, and 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, obtain the inductance main body 7 of N number of built-in air core coil 1, the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends exposes, cutting mode is Linear cut mode or blade cuts mode, and the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing;
8. insulation processing is carried out to the surface at other positions of inductance main body 7 except electrode section;
9. pre-treatment is carried out to the electrode section of inductance main body 7, and remove the insulating barrier of the end of two lead-in wires 11 of inductance main body 7 coil 1;
10. adopt physical vapour deposition (PVD) at one or more layers metal conducting layer of electrode section surface deposition of inductance main body 7, this metal conducting layer is electrode 8, the lead-in wire 11 one_to_one corresponding conducting that the electrode 8 at inductance main body 7 two ends and inductance main body 7 two ends are exposed, obtains surface mounting inductor.
In the present embodiment, the particle diameter of magnetic is 65 ~ 250 microns, magnetic is prepared from by the soft magnetic powder of particle diameter between 1 micron ~ 50 microns, and soft magnetic powder is the mixture of a kind of in carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel by powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and iron based nano crystal powder or at least two kinds.
Embodiment three: as shown in the figure, a kind of manufacture method of surface mounting inductor, comprises the following steps:
1. according to design specification, the enamelled wire with self-adhesive layer is coiled into the air core coil 1 that two ends have lead-in wire 11; The sticking temperature of the self-adhesive layer of enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of enamelled wire is 155 DEG C ~ 255 DEG C.
2. adopt magnetic to manufacture base, base comprises pedestal 2 and arranges on the base 2 and the N number of boss 3 becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
3. air core coil 1 and base is assembled: be enclosed within by N number of air core coil 1 one_to_one corresponding outside N number of boss 3 or be placed within N number of groove by N number of air core coil 1 one_to_one corresponding, obtain the assembly of N number of air core coil 1 and base, N number of air core coil 1 also becomes array-like to arrange with air core coil 1 N number of in the assembly of base, has a segment distance between adjacent two air core coils 1;
4. be placed within the die cavity 4 of cold stamping die with the assembly of base by N number of air core coil 1, carry out cold pressing treatment after inserting magnetic 5 in die cavity, obtain inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C;
5. be transferred in hot pressing die by first for inductance main body base and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact, the temperature of hot-pressing processing is 80 DEG C ~ 250 DEG C, and the pressurize processing time is 10 seconds ~ 300 seconds;
6. heat-treated by inductance main body green compact, obtain inductance main body blank 6, heat treated temperature is 150 DEG C ~ 250 DEG C, and 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, obtain the inductance main body 7 of N number of built-in air core coil 1, the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends exposes, cutting mode is Linear cut mode or blade cuts mode, and the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing;
8. insulation processing is carried out to the surface at other positions of inductance main body 7 except electrode section;
9. pre-treatment is carried out to the electrode section of inductance main body 7, and remove the insulating barrier of the end of two lead-in wires 11 of inductance main body 7 coil 1;
10. adopt physical vapour deposition (PVD) at one or more layers metal conducting layer of electrode section surface deposition of inductance main body 7, this metal conducting layer is electrode 8, the lead-in wire 11 one_to_one corresponding conducting that the electrode 8 at inductance main body 7 two ends and inductance main body 7 two ends are exposed, obtains surface mounting inductor.
In the present embodiment, the particle diameter of magnetic is 65 ~ 250 microns, magnetic is prepared from by the soft magnetic powder of particle diameter between 1 micron ~ 50 microns, and soft magnetic powder is the mixture of a kind of in carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel by powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and iron based nano crystal powder or at least two kinds.
In the present embodiment, the preparation process of magnetic is:
A. take soft magnetic powder, the quality of soft magnetic powder is designated as M, unit is gram;
B. taking quality for the chemical pure phosphoric acid of (0.1% ~ 2.5%) * M gram and quality is the acetone of (2% ~ 20%) * M gram, chemical pure phosphoric acid and acetone is mixed and stirs, obtaining the mixture of chemical pure phosphoric acid and acetone;
C. the mixture of chemical pure phosphoric acid and acetone is added in soft magnetic powder and be stirred to drying, obtain the first mixture of powders;
D. taking quality again for the epoxy resin of (0.5% ~ 5%) * M gram and quality is the acetone of (2% ~ 20%) * M gram, epoxy resin and acetone is mixed and stirs, 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 stir, obtain the second mixture of powders;
F. utilize Granulation Equipments to carry out granulation to the second mixture of powders, obtain the magnetic semi-finished product that particle diameter is 65 ~ 250 microns;
G. magnetic semi-finished product are carried out drying and processing, drying and processing temperature is 80 DEG C ~ 120 DEG C, and the time is 1 hour;
H. take quality for (0.5% ~ 3.0%) * M gram, the zinc stearate powder of particle diameter below 5 microns, zinc stearate powder is added in the magnetic semi-finished product after oven dry and stir 1 hour, obtain magnetic finished product.
Embodiment four: as shown in the figure, a kind of manufacture method of surface mounting inductor, comprises the following steps:
1. according to design specification, the enamelled wire with self-adhesive layer is coiled into the air core coil 1 that two ends have lead-in wire 11; The sticking temperature of the self-adhesive layer of enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of enamelled wire is 155 DEG C ~ 255 DEG C.
2. adopt magnetic to manufacture base, base comprises pedestal 2 and arranges on the base 2 and the N number of boss 3 becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
3. air core coil 1 and base is assembled: be enclosed within by N number of air core coil 1 one_to_one corresponding outside N number of boss 3 or be placed within N number of groove by N number of air core coil 1 one_to_one corresponding, obtain the assembly of N number of air core coil 1 and base, N number of air core coil 1 also becomes array-like to arrange with air core coil 1 N number of in the assembly of base, has a segment distance between adjacent two air core coils 1;
4. be placed within the die cavity 4 of cold stamping die with the assembly of base by N number of air core coil 1, carry out cold pressing treatment after inserting magnetic 5 in die cavity, obtain inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C;
5. be transferred in hot pressing die by first for inductance main body base and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact, the temperature of hot-pressing processing is 80 DEG C ~ 250 DEG C, and the pressurize processing time is 10 seconds ~ 300 seconds;
6. heat-treated by inductance main body green compact, obtain inductance main body blank 6, heat treated temperature is 150 DEG C ~ 250 DEG C, and 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, obtain the inductance main body 7 of N number of built-in air core coil 1, the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends exposes, cutting mode is Linear cut mode or blade cuts mode, and the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing;
8. insulation processing is carried out to the surface at other positions of inductance main body 7 except electrode section;
9. pre-treatment is carried out to the electrode section of inductance main body 7, and remove the insulating barrier of the end of two lead-in wires 11 of inductance main body 7 coil 1;
10. adopt physical vapour deposition (PVD) at one or more layers metal conducting layer of electrode section surface deposition of inductance main body 7, this metal conducting layer is electrode 8, the lead-in wire 11 one_to_one corresponding conducting that the electrode 8 at inductance main body 7 two ends and inductance main body 7 two ends are exposed, obtains surface mounting inductor.
In the present embodiment, air core coil 1 adopts the coiling of Alpha's mode to form, and the inner ring of air core coil 1 is circular or oval, and the angle between the lead-in wire 11 at air core coil 1 two ends and its extraction end face is 15 ° ~ 135 °.
Embodiment five: as shown in the figure, a kind of manufacture method of surface mounting inductor, comprises the following steps:
1. according to design specification, the enamelled wire with self-adhesive layer is coiled into the air core coil 1 that two ends have lead-in wire 11; The sticking temperature of the self-adhesive layer of enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of enamelled wire is 155 DEG C ~ 255 DEG C.
2. adopt magnetic to manufacture base, base comprises pedestal 2 and arranges on the base 2 and the N number of boss 3 becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
3. air core coil 1 and base is assembled: be enclosed within by N number of air core coil 1 one_to_one corresponding outside N number of boss 3 or be placed within N number of groove by N number of air core coil 1 one_to_one corresponding, obtain the assembly of N number of air core coil 1 and base, N number of air core coil 1 also becomes array-like to arrange with air core coil 1 N number of in the assembly of base, has a segment distance between adjacent two air core coils 1;
4. be placed within the die cavity 4 of cold stamping die with the assembly of base by N number of air core coil 1, carry out cold pressing treatment after inserting magnetic 5 in die cavity, obtain inductance main body just base, the temperature of cold pressing treatment is not higher than 50 DEG C;
5. be transferred in hot pressing die by first for inductance main body base and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact, the temperature of hot-pressing processing is 80 DEG C ~ 250 DEG C, and the pressurize processing time is 10 seconds ~ 300 seconds;
6. heat-treated by inductance main body green compact, obtain inductance main body blank 6, heat treated temperature is 150 DEG C ~ 250 DEG C, and 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, obtain the inductance main body 7 of N number of built-in air core coil 1, the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends exposes, cutting mode is Linear cut mode or blade cuts mode, and the lead-in wire 11 at each inductance main body 7 hollow core coil 1 two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing;
8. insulation processing is carried out to the surface at other positions of inductance main body 7 except electrode section;
9. pre-treatment is carried out to the electrode section of inductance main body 7, and remove the insulating barrier of the end of two lead-in wires 11 of inductance main body 7 coil 1;
10. adopt physical vapour deposition (PVD) at one or more layers metal conducting layer of electrode section surface deposition of inductance main body 7, this metal conducting layer is electrode 8, the lead-in wire 11 one_to_one corresponding conducting that the electrode 8 at inductance main body 7 two ends and inductance main body 7 two ends are exposed, obtains surface mounting inductor.
In the present embodiment, air core coil 1 adopts the coiling of Alpha's mode to form, and the inner ring of air core coil 1 is circular or oval, and the angle between the lead-in wire 11 at air core coil 1 two ends and its extraction end face is 15 ° ~ 135 °.
In the present embodiment, when the inner ring of air core coil 1 is circular, base comprise pedestal 2 with setting on the base 2 and the N number of boss 3 becoming array spacings to arrange time, boss 3 for cross section be circular cylindrical, the height of boss 3 is 0.2 times ~ 1.2 times of air core coil 1 axial height, and the diameter of boss 3 is 0.6 ~ 0.95 times of the internal diameter of air core coil 1; When the inner ring of air core coil 1 is oval, base comprise pedestal 2 with setting on the base 2 and the N number of boss 3 becoming array spacings to arrange time, boss 3 for cross section be oval cylindricality, the height of boss 3 is 0.2 times ~ 1.2 times of air core coil 1 axial height, the long diameter of boss 3 is 0.6 ~ 0.95 times of the long internal diameter of air core coil 1, and the short diameter of boss 3 is 0.6 ~ 0.95 times of the short internal diameter of air core coil 1; When the inner ring of air core coil 1 is circular, base comprise pedestal 2 and arrange on the base 2 and the N number of groove becoming array spacings to arrange time, the cylinder shape groove of groove to be cross section be circle, the diameter of groove is 1.05 ~ 1.5 times of the external diameter of air core coil 1; When the inner ring of air core coil 1 is oval, base comprise pedestal 2 with setting on the base 2 and the N number of groove becoming array spacings to arrange time, groove is cross section is oval cylindrical groove, the long diameter of groove is 1.05 ~ 1.5 times of the long external diameter of air core coil 1, and the short diameter of groove is 1.05 ~ 1.5 times of the short external diameter of air core coil 1.
Claims (9)
1. a manufacture method for surface mounting inductor, is characterized in that comprising the following steps:
1. inductance main body is prepared;
2. insulation processing is carried out to the surface at other positions of inductance main body except electrode section;
3. pre-treatment is carried out to the electrode section of inductance main body, and remove the insulating barrier of the end of two lead-in wires of inductance main body coil;
4. adopt a kind of one or more layers metal conducting layer of electrode section surface deposition in inductance main body in physical vapour deposition (PVD), chemical vapour deposition (CVD), plating and chemical plating process, this metal conducting layer is electrode, obtains surface mounting inductor.
2. a kind of surface mounting inductor manufacture method according to claim 1, is characterized in that the concrete steps preparing inductance main body in described step zero 1 are:
1.-1 according to design specification, and the enamelled wire with self-adhesive layer is coiled into the air core coil that two ends have lead-in wire;
1.-2 adopt magnetics to manufacture bases, described base comprises pedestal and to be arranged on described pedestal and the N number of boss becoming array spacings to arrange or N number of groove, N be more than or equal to 2 integer;
1.-3 assembling air core coil and bases: N number of air core coil one_to_one corresponding is enclosed within outside N number of boss or N number of air core coil one_to_one corresponding is placed within N number of groove, obtain the assembly of N number of air core coil and base, N number of air core coil also becomes array-like to arrange with N number of air core coil in the assembly of base, has a segment distance between adjacent two air core coils;
1.-4 the assembly of N number of air core coil and base is placed within the die cavity of cold stamping die, insert magnetic in die cavity after, carries out cold pressing treatment, obtain inductance main body just base;
1.-5 by inductance main body just base be transferred in hot pressing die and carry out hot-pressing processing and pressurize process successively, obtain inductance main body green compact;
1.-6 inductance main body green compact are heat-treated, obtain inductance main body blank;
1.-7 cut by the array that inductance main body blank is lined up according to N number of air core coil, obtain the inductance main body of N number of built-in air core coil, the lead-in wire at each inductance main body hollow core coil two ends exposes.
3. a kind of surface mounting inductor manufacture method according to claim 2, it is characterized in that the particle diameter of described magnetic is 65 ~ 250 microns, described magnetic is prepared from by the soft magnetic powder of particle diameter between 1 micron ~ 50 microns, and described soft magnetic powder is the mixture of a kind of in carbonyl iron powder, pure iron powder, iron Si powder, iron silicochromium powder, iron nickel by powder, iron nickel molybdenum powder, iron sial powder, iron-based amorphous powder and iron based nano crystal powder or at least two kinds.
4. a kind of surface mounting inductor manufacture method according to claim 3, is characterized in that the preparation process of described magnetic is:
A. take soft magnetic powder, the quality of soft magnetic powder is designated as M, unit is gram;
B. taking quality for the chemical pure phosphoric acid of (0.1% ~ 2.5%) * M gram and quality is the acetone of (2% ~ 20%) * M gram, chemical pure phosphoric acid and acetone is mixed and stirs, obtaining the mixture of chemical pure phosphoric acid and acetone;
C. the mixture of chemical pure phosphoric acid and acetone is added in soft magnetic powder and be stirred to drying, obtain the first mixture of powders;
D. taking quality again for the epoxy resin of (0.5% ~ 5%) * M gram and quality is the acetone of (2% ~ 20%) * M gram, epoxy resin and acetone is mixed and stirs, 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 stir, obtain the second mixture of powders;
F. utilize Granulation Equipments to carry out granulation to the second mixture of powders, obtain the magnetic semi-finished product that particle diameter is 65 ~ 250 microns;
G. magnetic semi-finished product are carried out drying and processing, drying and processing temperature is 80 DEG C ~ 120 DEG C, and the time is 1 hour;
H. take quality for (0.5% ~ 3.0%) * M gram, the zinc stearate powder of particle diameter below 5 microns, zinc stearate powder is added in the magnetic semi-finished product after oven dry and stir 1 hour, obtain magnetic finished product.
5. a kind of surface mounting inductor manufacture method according to claim 2, it is characterized in that described air core coil adopts the coiling of Alpha's mode to form, the inner ring of described air core coil is circular or oval, and the angle between the lead-in wire at described air core coil two ends and its extraction end face is 15 ° ~ 135 °.
6. the manufacture method of a kind of surface mounting inductor according to claim 5, is characterized in that:
When the inner ring of described air core coil is circular, described base comprise pedestal with to be arranged on described pedestal and the N number of boss becoming array spacings to arrange time, described boss is cross section is the cylindrical of circle, the height of described boss is 0.2 times ~ 1.2 times of described air core coil axial height, and the diameter of described boss is 0.6 ~ 0.95 times of the internal diameter of described air core coil;
When the inner ring of described air core coil is oval, described base comprise pedestal with to be arranged on described pedestal and the N number of boss becoming array spacings to arrange time, described boss is cross section is oval cylindricality, the height of described boss is 0.2 times ~ 1.2 times of described air core coil axial height, the long diameter of described boss is 0.6 ~ 0.95 times of the long internal diameter of described air core coil, and the short diameter of described boss is 0.6 ~ 0.95 times of the short internal diameter of described air core coil;
When the inner ring of described air core coil is circular, described base comprise pedestal with to be arranged on described pedestal and the N number of groove becoming array spacings to arrange time, described groove is cross section is circular cylinder shape groove, and the diameter of described groove 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 oval, described base comprise pedestal with to be arranged on described pedestal and the N number of groove becoming array spacings to arrange time, described groove is cross section is oval cylindrical groove, the long diameter of described groove is 1.05 ~ 1.5 times of the long external diameter of described air core coil, and the short diameter of described groove is 1.05 ~ 1.5 times of the short external diameter of described air core coil.
7. the manufacture method of a kind of surface mounting inductor according to claim 2, is characterized in that the sticking temperature of the self-adhesive layer of described enamelled wire is 80 DEG C ~ 220 DEG C, and the temperature resistant grade of described enamelled wire is 155 DEG C ~ 255 DEG C.
8. the manufacture method of a kind of surface mounting inductor according to claim 2, it is characterized in that the temperature of described cold pressing treatment is not higher than 50 DEG C, the temperature of described hot-pressing processing is 80 DEG C ~ 250 DEG C, the described pressurize processing time is 10 seconds ~ 300 seconds, described heat treated temperature is 150 DEG C ~ 250 DEG C, and described heat treatment time is 30 minutes ~ 300 minutes.
9. the manufacture method of a kind of surface mounting inductor according to claim 2, it is characterized in that described cutting mode is Linear cut mode or blade cuts mode, the lead-in wire at each inductance main body hollow core coil two ends can directly make it expose by cutting mode or make it expose by lapping mode after dicing.
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| 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 |
| CN109166717A (en) * | 2018-09-03 | 2019-01-08 | 横店集团东磁股份有限公司 | Integrated inductance forming method |
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| 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 |
| CN111724968A (en) * | 2019-03-22 | 2020-09-29 | 乾坤科技股份有限公司 | Inductor array |
| CN113012916A (en) * | 2020-10-19 | 2021-06-22 | 湖南创一电子科技股份有限公司 | Method for preparing metal powder core integrated chip inductor |
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| 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 |
| WO2023226875A1 (en) * | 2022-05-27 | 2023-11-30 | 张灵波 | Manufacturing method for surface mounting inductor |
| CN117038298A (en) * | 2023-08-23 | 2023-11-10 | 东莞市三体微电子技术有限公司 | Isolation type inductance row and manufacturing method thereof |
| 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 |
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