CN114242408A - Coil component - Google Patents
Coil component Download PDFInfo
- Publication number
- CN114242408A CN114242408A CN202210020384.8A CN202210020384A CN114242408A CN 114242408 A CN114242408 A CN 114242408A CN 202210020384 A CN202210020384 A CN 202210020384A CN 114242408 A CN114242408 A CN 114242408A
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- China
- Prior art keywords
- lead
- protruding
- metal sheet
- wire
- outgoing line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims abstract description 64
- 229910052751 metal Inorganic materials 0.000 claims abstract description 64
- 238000003466 welding Methods 0.000 claims abstract description 36
- 239000003973 paint Substances 0.000 claims abstract description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 9
- 229910001004 magnetic alloy Inorganic materials 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims description 16
- 239000011888 foil Substances 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 239000004020 conductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The present invention provides a coil component, including: the coil is formed by winding an enameled copper wire; which has an extended free end to form a lead-out wire; the magnet contains soft magnetic alloy material and resin, and wraps the coil, the welding spot and the outgoing line inside; a metal sheet is arranged on the surface of the magnet; the two end parts of one end of the metal sheet are provided with protruding parts, and the lead wires are bent towards the protruding parts near the end parts of the protruding parts; or the lead wire and the protruding portion are bent synchronously toward the protruding portion in the vicinity of the end portion of the protruding portion; the leading-out wire and the end part of the protruding part are mutually contacted to form a joint, and the joint is welded by laser to form a welding spot; the part of the outgoing line, which is in contact with the protruding part, is subjected to 360-degree paint film stripping, no paint film is left at the welding position of the outgoing line, the outgoing line is bent as required, the outgoing line and the metal sheet are completely attached during welding, and insufficient welding is solved, so that the risk of open circuit of the integrated inductor is eliminated.
Description
Technical Field
The invention belongs to the technical field of integrated inductors, and particularly relates to a coil component. More particularly, the present invention relates to a connection structure between lead wires of a coil component and a metal sheet.
Background
In a conventional integrated inductor, the coil leads and the metal sheets are usually connected by laser welding. The depainted state of the copper wire at the welding site is usually defined as an undeainted or partially depainted film, and the manner of connection of the copper wire lead and the foil is not clearly defined. If a varnish exists on the surface of the copper wire or the lead and the metal foil are not sufficiently contacted during laser welding, cold joint may be caused and an open circuit may be caused. Due to the difference of welding states, the problem of insufficient welding exists, so that the product is opened when in use, the product fails when in use, and the circuit function cannot be realized.
Chinese patent publication No. CN110678945A discloses an inductor component and a manufacturing method thereof. The lead wire is connected to the tip of the bonding tab by bending the lead portion of the bonding tab at two portions thereof and then fusing the tip of the bonding tab to the lead wire. Chinese patent publication No. CN107591233B, the lead wire is extended out of the magnet/core outer surface and bonded with a terminal electrode having a specific shape. Chinese patent publication No. CN106165035B discloses a method of extending lead wires from the outer surface of a magnet/core and welding the lead wires to a tab having a complex specific shape. Therefore, in order to improve the reliability of the integrated inductor, a specific mode or a special device is generally adopted in the industry to ensure the fixing and connection of the outgoing line and the metal sheet. Compared with the prior art, the method is simpler and more effective, the outgoing line does not need to extend to the outside of the magnet, the complexity of the metal sheet is greatly reduced, the method is more beneficial to low-cost and large-batch automatic production and manufacture on the basis of ensuring high reliability, and the benefit can be obviously improved.
Disclosure of Invention
In order to solve the problems, the invention discloses a coil component which has no paint film residue at the welding position of an outgoing line, leads the outgoing line and a metal sheet to be completely attached during welding, solves insufficient welding and further eliminates the risk of open circuit of an integrated inductor.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an object of the present invention is to provide a coil component comprising:
the coil is formed by winding an enameled copper wire; which has an extended free end to form a lead-out wire; the magnet contains soft magnetic alloy material and resin, and wraps the coil, the welding spot and the outgoing line inside; mounting a metal sheet on the surface of the magnet to form an electrode and connecting the outgoing line with an external circuit;
a metal sheet, wherein two end parts of one end of the metal sheet are provided with protruding parts, the leading wire is bent towards the protruding parts near the end parts of the protruding parts, or the end parts of the protruding parts are bent towards the leading wire, so that the leading wire and the protruding parts are contacted at the end parts to form a joint;
and the part of the outgoing line, which is contacted with the protruding part, is subjected to paint removal and coating for 360 degrees, and the copper conductor is remained.
Further, the distance between the paint removal starting point of the outgoing line and the joint point is not less than 0 and not more than L; preferably, the distance between the paint removal starting point of the outgoing line and the joint point is more than or equal to 0 and less than or equal to 3 mm; and ensuring that the lead at the welding position has no paint coating.
Furthermore, the included angle theta between the outgoing line and the extension line of the metal sheet is more than or equal to 0 degree and less than or equal to 180 degrees; preferably, the included angle between the outgoing line and the extension line of the metal sheet is more than or equal to 30 degrees and less than or equal to 60 degrees; so that the lead wires and the foil contact each other to form a joint.
Further, the distance between the bending starting point of the lead-out wire and the end part of the protruding part is more than or equal to L1(ii) a Preferably, the distance between the bending starting point of the lead wire and the end part of the protruding part is more than or equal to 0 and less than or equal to L1Less than or equal to 2 mm; ensuring that the lead-out wire and the metal sheet are contacted with each other.
Further, the surface of the magnet is provided with a concave part, and the other end of the metal sheet is bent in the concave part.
Another object of the present invention is to provide a coil component, comprising:
the coil is formed by winding an enameled copper wire; which has an extended free end to form a lead-out wire;
the magnet contains soft magnetic alloy material and resin, and wraps the coil, the welding spot and the outgoing line inside; mounting a metal sheet on the surface of the magnet to form an electrode and connecting the outgoing line with an external circuit;
the metal sheet, both ends of one end of the metal sheet are provided with protruding portions, the said lead-out wire and protruding portion are towards the synchronous bending of the protruding portion direction near the end of the said protruding portion; or the protruding part is bent at the end part position, and the leading-out wire is bent towards the bent position of the protruding part near the end part of the protruding part; contacting the lead-out wire with the protruding portion at the end position to form a joint;
and the contact part of the outgoing line and the protruding part is subjected to paint removal and coating for 360 degrees, and the copper conductor is remained.
Further, the distance between the paint removal starting point of the outgoing line and the joint point is not less than 0 and not more than L; preferably, the distance between the paint removal starting point of the outgoing line and the joint point is more than or equal to 0 and less than or equal to 3 mm; and ensuring that the lead at the welding position has no paint coating.
Furthermore, the included angle theta between the outgoing line and the extension line of the metal sheet is more than or equal to 0 degree and less than or equal to 180 degrees; preferably, the included angle between the outgoing line and the extension line of the metal sheet is more than or equal to 30 degrees and less than or equal to 60 degrees; so that the lead wires and the metal foil are in contact with each other at the time of soldering.
Further, the distance between the bending starting point of the lead-out wire and the end part of the protruding part is more than or equal to L and is more than or equal to 01(ii) a Preferably, the distance between the bending starting point of the lead wire and the end part of the protruding part is more than or equal to 0 and less than or equal to L1Less than or equal to 2 mm; ensuring that the lead-out wire and the metal sheet are contacted with each other.
Further, the surface of the magnet is provided with a concave part, and the other end of the metal sheet is bent in the concave part.
Compared with the prior art, the invention has the beneficial effects that:
according to the coil component, the contact part of the outgoing line and the protruding part is subjected to 360-degree paint stripping, the residual copper conductor ensures that no paint film residue exists at the welding position, and the outgoing line and the metal sheet are completely welded during welding, so that the phenomenon that the paint film on the surface of an enameled copper wire is high in temperature resistance, and the heat of laser cannot penetrate through the paint film to influence the welding effect is avoided; in order to ensure the welding effect, the lead and the metal sheet need to be contacted with each other during welding. The included angle between the outgoing line and the extension line of the metal sheet is set to be not less than 0 degree and not more than 180 degrees, the distance between the starting point of the lead bending and the end part of the protruding part of the metal sheet is not less than 0 degree, the lead and the metal sheet are ensured to be contacted with each other to form a joint, and the problem that due to the fact that a gap is usually formed between the metal sheet and the outgoing line, the lead can not be completely attached to cause open circuit of a cold solder is avoided. The invention solves the problem of insufficient soldering, thereby eliminating the risk of open circuit of the integrated inductor, and the implementation mode is very simple on the basis of improving the reliability of the product, and can effectively reduce the cost.
Drawings
FIG. 1 is a perspective view of a coil component according to the present invention before welding;
FIG. 2 is a perspective view of a coil component of the present invention after welding;
fig. 3 is a schematic diagram of a coil structure in example 1 of the present invention, the left diagram is a schematic diagram of a coil structure in the first embodiment, and the right diagram is a schematic diagram of a coil structure in the second embodiment;
FIG. 4 is a schematic structural diagram of a coil in example 2 of the present invention, wherein the left drawing is a schematic diagram of the coil and a metal sheet; the right figure is a partial top enlarged view of the left figure junction;
FIG. 5 is a schematic view of a coil structure according to embodiment 3 of the present invention;
FIG. 6 is a flow chart of a coil component manufacturing process according to the present invention, wherein the first step is winding, the 360 DEG stripping film, the second step is lead processing, the third step is welding, the fourth step is forming, and the fifth step is bending a metal sheet to form an electrode.
List of reference symbols:
A. a magnet; B. a coil; C. welding spots; E. a metal foil; F. coating with paint; G. a copper conductor;
1 a: enamelling copper wires; 1 b: an outgoing line; 2 a: a protrusion; 3 a: a junction; 3 b: a gap; 4 a: a bending starting point of the outgoing line; θ: the bent 1b outgoing line and the extension line of the 2a metal sheet form an included angle theta; l: the distance of the stripping initiation point from the point of engagement.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
Example 1
As shown in fig. 1 to 3, two embodiments.
Wherein, the first embodiment: a coil component comprising:
the coil B is formed by winding an enameled copper wire 1 a; having an extended free end forming a lead-out wire 1 b;
the magnet A contains soft magnetic alloy material and resin, and wraps the coil B, the welding spot C and the outgoing line 1B inside; a metal sheet E is arranged on the surface of the magnet A to form an electrode, and the leading-out wire 1b and an external circuit are connected;
a metal sheet E having a protruding portion 2a at both ends of one end thereof, the lead wire 1b being bent toward the protruding portion 2a in the vicinity of the end of the protruding portion 2a, and the lead wire 1b and the protruding portion 2a being brought into contact at the end position to form a joint 3 a; the surface of the magnet A is provided with a concave part, and the other end of the metal sheet E is bent in the concave part;
the lead-out wire 1b and the projection 2a are contacted with each other, and the paint and the coating F are removed at 360 degrees, and the copper conductor G is remained; the distance L between the paint removal starting point of the leading-out wire 1b and the junction point 3a is more than or equal to 0.5mm and less than or equal to 2.0 mm; the included angle theta between the outgoing line 1b and the extension line of the metal sheet E is more than or equal to 30 degrees and less than or equal to 60 degrees; the distance between the bending start point 4a of the lead wire 1b and the end of the projection 2a is not less than 0L1≤1.0mm。
The second embodiment: a coil component comprising:
the coil B is formed by winding an enameled copper wire 1 a; having an extended free end forming a lead-out wire 1 b;
the magnet A contains soft magnetic alloy material and resin, and wraps the coil B, the welding spot C and the outgoing line 1B inside; a metal sheet E is arranged on the surface of the magnet A to form an electrode, and the leading-out wire 1b and an external circuit are connected;
a metal sheet E having a protruding portion 2a at both ends of one end thereof, the lead wire 1b and the protruding portion 2a being bent in the vicinity of the end of the protruding portion 2a in synchronization with each other in the direction of the protruding portion 2a, and the lead wire 1b and the protruding portion 2a being brought into contact with each other at the end position to form a joint 3 a; the surface of the magnet A is provided with a concave part, and the other end of the metal sheet E is bent in the concave part;
the lead-out wire 1b and the projection 2a are contacted with each other, and the paint and the coating F are removed at 360 degrees, and the copper conductor G is remained; the distance L between the paint removal starting point of the outgoing line 1b and the welding point C is more than or equal to 0.5mm and less than or equal to 2.0 mm; the included angle theta between the outgoing line 1b and the extension line of the metal sheet E is more than or equal to 30 degrees and less than or equal to 60 degrees; the distance between the bending start point 4a of the lead wire 1b and the end of the projection 2a is not less than 0L1≤1.0mm。
Example 2
As shown in fig. 4, a coil component includes;
the coil B is formed by winding an enameled copper wire 1 a; having an extended free end forming a lead-out wire 1 b;
the magnet A contains soft magnetic alloy material and resin, and wraps the coil B, the welding spot C and the outgoing line 1B inside; a metal sheet E is arranged on the surface of the magnet A to form an electrode, and the leading-out wire 1b and an external circuit are connected;
a metal sheet E, wherein two end parts of one end of the metal sheet E are provided with protruding parts 2a, the protruding parts 2a are bent at end parts to form a specific shape, the leading wire 1b is bent towards the bent position of the protruding parts 2a near the end parts of the protruding parts 2a, and the leading wire 1b is contacted with the bent position of the protruding parts 2a to form a joint 3 a; the surface of the magnet A is provided with a concave part, and the other end of the metal sheet E is bent in the concave part;
the lead-out wire 1b and the projection 2a are contacted with each other, and the paint and the coating F are removed at 360 degrees, and the copper conductor G is remained; the distance L between the paint removal starting point of the leading-out wire 1b and the junction point 3a is more than or equal to 0.5mm and less than or equal to 2.0 mm; the included angle theta between the outgoing line 1b and the extension line of the metal sheet E is more than or equal to 30 degrees and less than or equal to 60 degrees; the distance between the bending start point 4a of the lead wire 1b and the end of the projection 2a is not less than 0L1≤1.0mm。
Example 3
As shown in fig. 5, a coil component includes;
the coil B is formed by winding an enameled copper wire 1 a; having an extended free end forming a lead-out wire 1 b;
the magnet A contains soft magnetic alloy material and resin, and wraps the coil B, the welding spot C and the outgoing line 1B inside; a metal sheet E is arranged on the surface of the magnet A to form an electrode, and the leading-out wire 1b and an external circuit are connected;
a metal sheet E having a protruding portion 2a at both ends of one end thereof, the protruding portion 2a being bent toward the lead wire 1b at an end position thereof, and a joint 3a being formed by bringing the lead wire 1b into contact with the bent portion 2 a; the surface of the magnet A is provided with a concave part, and the other end of the metal sheet E is bent in the concave part;
the lead-out wire 1b and the projection 2a are contacted with each other, and the paint and the coating F are removed at 360 degrees, and the copper conductor G is remained; the distance L between the paint removal starting point of the leading-out wire 1b and the junction point 3a is more than or equal to 0.5mm and less than or equal to 2.0 mm; the included angle theta between the outgoing line 1b and the extension line of the metal sheet E is more than or equal to 30 degrees and less than or equal to 60 degrees; the distance between the bending start point of the protruding part 2a and the lead is not less than 0L1≤1.0mm。
Example 4
As shown in fig. 6, a process flow diagram for manufacturing a coil component according to the present invention is as follows:
winding an enameled copper wire 1a into a coil B, and forming a 360-degree stripping film of a lead-out wire 1B at an extended free end;
bending the leading-out wire 1b towards the protruding part 2a near the end part of the protruding part 2a according to the requirement of an included angle between the leading-out wire 1b and the metal sheet E; or the lead wire 1b and the protruding portion 2a are bent in synchronization with each other in the direction of the protruding portion 2a in the vicinity of the end of the protruding portion 2 a;
the lead wire 1b and the protruding part 2a are contacted at the end part position to form a joint point 3a, and the joint point 3a is subjected to laser welding to form a welding spot C;
fourthly, the welded coil B and the welded metal sheet E are subjected to magnet A forming;
and fifthly, bending the metal sheet E to form the electrode.
It should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.
Claims (10)
1. A coil component, comprising:
the coil is formed by winding an enameled copper wire; which has an extended free end to form a lead-out wire;
the magnet contains soft magnetic alloy material and resin, and wraps the coil, the welding spot and the outgoing line inside; a metal sheet is arranged on the surface of the magnet;
a metal sheet, wherein two end parts of one end of the metal sheet are provided with protruding parts, the leading wire is bent towards the protruding parts near the end parts of the protruding parts, or the end parts of the protruding parts are bent towards the leading wire, so that the leading wire and the protruding parts are contacted at the end parts to form a joint;
wherein, the part of the outgoing line contacted with the protruding part is subjected to 360-degree paint stripping.
2. A coil component according to claim 1, characterized in that the stripping starting points of the lead-out wires are at a distance of 0mm ≦ L from the joint.
3. A coil component according to claim 1, wherein said lead-out wire forms an angle of 0 ° ≦ θ ≦ 180 ° with respect to the extension of the metal foil.
4. The coil component according to claim 1, wherein a distance between the bend starting point of the lead wire and the end of the protruding portion is 0. ltoreq.L1。
5. A coil component according to claim 1, wherein said magnet surface is provided with a recess, and the other end of said metal foil is bent into said recess.
6. A coil component, comprising:
the coil is formed by winding an enameled copper wire; which has an extended free end to form a lead-out wire;
the magnet contains soft magnetic alloy material and resin, and wraps the coil, the welding spot and the outgoing line inside; a metal sheet is arranged on the surface of the magnet;
the metal sheet, both ends of one end of the metal sheet are provided with protruding portions, the said lead-out wire and protruding portion are towards the synchronous bending of the protruding portion direction near the end of the said protruding portion; or the protruding part is bent at the end part position, and the leading-out wire is bent towards the bent position of the protruding part near the end part of the protruding part; contacting the lead-out wire with the protruding portion at the end position to form a joint;
wherein, the part of the outgoing line contacted with the protruding part is subjected to 360-degree paint stripping.
7. A coil component according to claim 5, characterized in that the stripping starting points of the lead-out wires are at a distance of 0mm ≦ L from the joint.
8. A coil component according to claim 5, wherein said lead-out wire forms an angle of 0 ° ≦ θ ≦ 180 ° with respect to the extension of the metal foil.
9. A coil component according to claim 5, wherein the lead wire has a bend origin at a distance of 0mm L from the end of the projection1。
10. A coil component according to claim 5, wherein said magnet surface is provided with a recess, and the other end of said metal sheet is bent into said recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020384.8A CN114242408A (en) | 2022-01-07 | 2022-01-07 | Coil component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020384.8A CN114242408A (en) | 2022-01-07 | 2022-01-07 | Coil component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114242408A true CN114242408A (en) | 2022-03-25 |
Family
ID=80746145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210020384.8A Pending CN114242408A (en) | 2022-01-07 | 2022-01-07 | Coil component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114242408A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036114A (en) * | 2022-08-10 | 2022-09-09 | 杭州正华电子科技有限公司 | Secondary lead structure of miniature current transformer and packaging process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552106A (en) * | 2007-12-27 | 2009-10-07 | Tdk股份有限公司 | Wiring method of coil component |
| CN104465034A (en) * | 2013-09-18 | 2015-03-25 | Tdk株式会社 | Coil apparatus |
| CN104658754A (en) * | 2013-11-22 | 2015-05-27 | 万润科技股份有限公司 | Coil manufacturing method and apparatus |
| CN207938440U (en) * | 2018-03-26 | 2018-10-02 | 东莞铭普光磁股份有限公司 | A kind of coil component |
| CN109545505A (en) * | 2018-11-29 | 2019-03-29 | 深圳顺络电子股份有限公司 | A kind of high reliability inductance and preparation method thereof |
| CN110678945A (en) * | 2017-06-29 | 2020-01-10 | 松下知识产权经营株式会社 | Inductor component and method for manufacturing same |
-
2022
- 2022-01-07 CN CN202210020384.8A patent/CN114242408A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552106A (en) * | 2007-12-27 | 2009-10-07 | Tdk股份有限公司 | Wiring method of coil component |
| CN104465034A (en) * | 2013-09-18 | 2015-03-25 | Tdk株式会社 | Coil apparatus |
| CN104658754A (en) * | 2013-11-22 | 2015-05-27 | 万润科技股份有限公司 | Coil manufacturing method and apparatus |
| CN110678945A (en) * | 2017-06-29 | 2020-01-10 | 松下知识产权经营株式会社 | Inductor component and method for manufacturing same |
| CN207938440U (en) * | 2018-03-26 | 2018-10-02 | 东莞铭普光磁股份有限公司 | A kind of coil component |
| CN109545505A (en) * | 2018-11-29 | 2019-03-29 | 深圳顺络电子股份有限公司 | A kind of high reliability inductance and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036114A (en) * | 2022-08-10 | 2022-09-09 | 杭州正华电子科技有限公司 | Secondary lead structure of miniature current transformer and packaging process thereof |
| CN115036114B (en) * | 2022-08-10 | 2022-11-08 | 杭州正华电子科技有限公司 | Secondary lead structure of miniature current transformer and packaging process thereof |
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