KR101123424B1 - Method for Fabricating Planar Transformer - Google Patents
Method for Fabricating Planar Transformer Download PDFInfo
- Publication number
- KR101123424B1 KR101123424B1 KR20100076675A KR20100076675A KR101123424B1 KR 101123424 B1 KR101123424 B1 KR 101123424B1 KR 20100076675 A KR20100076675 A KR 20100076675A KR 20100076675 A KR20100076675 A KR 20100076675A KR 101123424 B1 KR101123424 B1 KR 101123424B1
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- film
- inlay
- coil
- inlay film
- forming
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Abstract
The present invention relates to a method for manufacturing a planar transformer by transferring a coiled coil pattern material by copper plating using a pole master and attaching it to a plastic film, and using an electro-formed master to input an outer portion. Transferring and adhering the coil pattern including the terminal and the output terminal to a plastic film to form a first inlay film having a winding coil for forming a primary coil; Transferring and adhering a coil pattern having an input terminal and an output terminal to the outside using a pole master with a plastic film to form a second inlay film having a winding coil for forming a secondary coil; Forming an insulation by pattern screen printing a portion of the winding coil of the inlay film with an insulation material; Transferring and bonding a jump line electrically connectable from an inner winding coil end to an outer output terminal using a pole master to the inlay film; And combining the first inlay film and the second inlay film by thermal compression.
Description
The present invention relates to a planar transformer, and more particularly, to form a wound coil pattern using copper plating using an electro-formed master having a wound coil pattern, and then winding the wound coil pattern to a plastic. The present invention relates to a planar transformer that can be produced by transferring and attaching to a film to produce a wound inlay film and incorporating these films.
Planar transformers are electronic components used in power conversion devices of electronic devices such as televisions, communicators, computers, etc., and the basic configuration includes primary coils and secondary coils made by winding copper wire around a ferrite core.
The planar transformer may change the number of turns of the pair of primary and secondary coils to change the voltage applied to the primary and secondary coils.
Such transformers can be used for various purposes in electronic circuits. In other words, it is widely used as a transformer for increasing and decreasing voltage, a power transformer, a transformer for noise reduction, and the like, in particular, a transformer used in a switching mode power supply and a DC-DC converter, etc., to transmit a signal of a high voltage square wave to a low voltage square wave. Used.
Recently, due to the trend toward miniaturization and thinning of electronic devices, transformers entering the power supply unit of electronic devices also need to be miniaturized and low profile.
Conventional miniature transformers for electronic components have a problem in that they are structurally thin because they are formed of a primary coil and a secondary coil made of a wound copper wire.
In addition, in the case of the planar transformer which has improved this, a plurality of primary coils and secondary coils wound with copper wires have been stacked, and holes have been manufactured to process holes to electrically connect the stacked coils, and to be plated inside the holes.
However, the conventional planar transformer has a limitation in thinning because it is manufactured by winding a copper wire, and it is difficult to easily change the thickness, the cross-sectional area of the winding coil, the number of turns of the winding, and the terminal terminal.
In addition, the conventional planar transformer has a technical difficulty in that a plurality of coils are stacked and hole processing and secondary plating processes inside the holes are performed to electrically connect the stacked coils.
The present invention is to solve this problem, to manufacture a winding assembly of the shape wound around the ferrite core primary coil and the secondary coil wound while transferring the wound coil pattern to a flat plastic film. It is therefore an object of the present invention to provide a method of manufacturing a planar transformer that can be structurally thin.
In addition, an object of the present invention is to provide a planar manufacturing method excellent in dielectric breakdown voltage characteristics while reducing the volume of the transformer, miniaturization and thinning.
In addition, it is an object of the present invention to provide a planar manufacturing method that does not require hole processing for electrically connecting the terminals of the film when two or more coil films are laminated.
According to an embodiment of the present invention, a coil coil having an input part terminal and an output part terminal on the outside is transferred and bonded to a plastic film using an electro-formed master to form a winding coil for forming a primary coil. Forming an embedded first inlay film; Transferring and adhering a coil pattern having an input terminal and an output terminal to the outside using a pole master with a plastic film to form a second inlay film having a winding coil for forming a secondary coil; Forming an insulation by pattern screen printing a portion of the winding coil of the inlay film with an insulation material; Transferring and bonding a jump line electrically connectable from an inner winding coil end to an outer output terminal using a pole master to the inlay film; And combining the first inlay film and the second inlay film by thermal compression.
In this case, the method of manufacturing a planar string transformer according to the present invention transfers and bonds a coil pattern having an input terminal and an output terminal to the outside using a electro-formed master with a plastic film to form a primary coil. Forming a third inlay film having a winding coil embedded therein; Disposing the third inlay film opposite the first inlay film about the second inlay film and bonding by thermal compression; Preferably, the method further includes electrically connecting the output terminal of the first inlay film and the input terminal of the third inlay film by terminating the input terminal.
The method may further include applying a conductive paste to a surface in electrical contact with the first inlay film and the second inlay film when the jump line is formed before thermocompression bonding.
In addition, the bonded plurality of inlay film may further comprise the step of bonding to the E-shaped ferrite core.
In addition, the primary coil forming inlay film or the secondary coil forming inlay film with the winding coil is further formed, and the plurality of primary coil forming inlay films are electrically connected to each other and the plurality of second By further comprising electrically connecting the inlay films for forming the secondary coils to each other, it becomes possible to manufacture a planar transformer from a large number of inlay films.
According to the present invention, since the primary coil and the secondary coil pattern material can be easily implemented with the copper plating pattern having excellent electrical characteristics by using the pole master, the structure can be made thinner.
In addition, the copper plating pattern formed by the plating process can achieve the same characteristics as the conventional copper wire in terms of electrical characteristics and physical properties, and in the design of the pattern it is necessary to vary the cross-sectional area and the line width of the winding pattern It becomes possible.
In addition, when two or more coil films are laminated, cost reduction may be required because hole processing for electrically connecting terminals of the film is not necessary.
1 is an exploded view of a planar transformer according to an embodiment of the present invention.
2 is a configuration diagram of a first inlay film in which the wound coil for forming the primary coil is embedded;
3 is a cross-sectional view illustrating a jump line connection state of a first inlay film having a coiled coil for forming a primary coil;
4 is a configuration diagram of a second inlay film in which a wound coil for forming a secondary coil is embedded;
FIG. 5 is a cross-sectional view illustrating a jump line connection state of a second inlay film in which a wound coil for forming a secondary coil is embedded; FIG.
6 is a configuration diagram of a third inlay film in which the wound coil for forming the primary coil is embedded;
7 is a cross sectional view of the EF dashed portion of the completed planar transformer.
Figure 8 is a plan view and side view of the configuration of a flat transformer and a ferrite core made according to the present invention.
FIG. 9 illustrates a planar transformer including a first inlay film for forming a primary coil and a second inlay film for forming a secondary coil .
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the following examples may be modified in various other forms, the scope of the present invention Is not limited to the following examples.
FIG. 1 is an exploded view of a planar transformer showing the configuration of inlay films having a coil wound therein in a planar transformer according to an embodiment of the present invention.
As shown in FIG. 1, the number of windings is increased by using two
First, a wound coil embedded inlay film, which is formed by transferring a wound pattern coil using a pole master, is manufactured.
As used herein, the electric pole master refers to a thing such as a mold capable of plating and transferring a wound pattern coil, and having a mass productivity that can repeatedly use a desired pattern.
The
In order to increase the number of windings of the primary coil, the
2 is a configuration diagram of the
As shown in FIG. 2, the
The
First, the
The
In this case, the
The
4 is a configuration diagram of the
That is, as shown in FIG. 4, the input terminal 220 of the secondary coil extends into the
In addition, the winding
The
6 illustrates a configuration diagram of the
As shown in FIG. 6, the input terminal 320 of the primary coil is connected to the
As a result, the electrical flow is connected to the
As such, the primary coil exhibits a winding effect wound eight times as a whole. At this time, the
The planar transformer completed by doing so is shown in FIG. 7.
Referring to the cross-sectional view of the dotted line EF shown in FIG. 7, the first inlay v-
The film for inlay applied in the present invention is a polyester (PET) film or a polyimide (PI) film is applicable, and other plastic film can also be widely applied if the heat resistance.
In addition, the adhesive coated on the film to attach the coil pattern to the film as shown in Figure 3 may preferably use a liquid hot melt adhesive liquid.
FIG. 8 shows a plan view and a side view of the construction of a planar transformer manufactured by the present invention and a ferrite core.
In order to realize a more efficient magnetic effect, the winding assembly formed of the primary coil and the secondary coil may be assembled with the E-shaped ferrite core.
The E-shaped core may be composed of a
The
FIG. 9 illustrates an embodiment of another planar transformer configured by integrating one
As shown in FIG. 9, it is also possible to construct a planar transformer by pressing two inlay films to form a primary coil and a secondary coil. That is, by increasing or decreasing the number of turns of each inlay film, it is possible to manufacture a desired planar transformer.
As described above, the present invention can use only one inlay film for forming the primary coil, so that the process is simple, and when two or more primary coil inlay films are stacked, the terminals of the two inlay films are electrically connected. There is an advantage that the hole processing for the connection and the plating process of the secondary hole is not necessary.
While the above has been shown and described with respect to preferred embodiments of the invention, the invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.
100: first inlay film
200: second inlay film
300: third inlay film
Claims (5)
Transferring and adhering a coil pattern having an input terminal and an output terminal to the outside using a pole master with a plastic film to form a second inlay film having a winding coil for forming a secondary coil;
Forming an insulation by pattern screen printing a portion of the winding coils of each of the first inlay film and the second inlay film with an insulating material;
Transferring and bonding a jump line electrically connected to an output terminal terminal from an inner winding coil end to an outer output terminal terminal using a pole master to each of the first inlay film and the second inlay film;
Bonding the first inlay film and the second inlay film by thermal compression;
Method of producing a planar transformer, characterized in that it comprises a.
Transferring and bonding a coil pattern having an input terminal and an output terminal to the outside using a electro-formed master with a plastic film to form a third inlay film containing a winding coil for forming a primary coil step;
Disposing the third inlay film opposite the first inlay film about the second inlay film and bonding by thermal compression;
And electrically connecting the output terminal of the first inlay film and the input terminal of the third inlay film by terminating the input terminal of the third inlay film.
The method of claim 1, further comprising applying a conductive paste to the surface of the electrical contact when the jump line is formed before thermal compression of the first inlay film and the second inlay film.
Bonding the plurality of bonded inlay films to an E-shaped ferrite core.
Further forming a primary coil forming inlay film or secondary coil forming inlay film with the winding coil is built in, and a plurality of primary coil forming inlay film electrically connected to each other and a plurality of secondary coils Method for producing a planar transformer, characterized in that it further comprises the step of electrically connecting the forming inlay film to each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR20100076675A KR101123424B1 (en) | 2010-08-10 | 2010-08-10 | Method for Fabricating Planar Transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR20100076675A KR101123424B1 (en) | 2010-08-10 | 2010-08-10 | Method for Fabricating Planar Transformer |
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KR20120014610A KR20120014610A (en) | 2012-02-20 |
KR101123424B1 true KR101123424B1 (en) | 2012-03-23 |
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KR20100076675A KR101123424B1 (en) | 2010-08-10 | 2010-08-10 | Method for Fabricating Planar Transformer |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2548266A (en) * | 2015-11-04 | 2017-09-13 | Payton Planar Magnetics Ltd | Planar transformer components comprising electrophoretically deposited coating |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102054742B1 (en) * | 2018-03-08 | 2019-12-11 | 조현귀 | Method for manufacturing Integral type Transfomer coil printed circuit board having Input side Primary coil and Output side Secondary coil |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000029817A (en) * | 1996-08-05 | 2000-05-25 | 인터내셔날 파워 디바이시즈 아이엔시 | Planar transformer |
-
2010
- 2010-08-10 KR KR20100076675A patent/KR101123424B1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000029817A (en) * | 1996-08-05 | 2000-05-25 | 인터내셔날 파워 디바이시즈 아이엔시 | Planar transformer |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2548266A (en) * | 2015-11-04 | 2017-09-13 | Payton Planar Magnetics Ltd | Planar transformer components comprising electrophoretically deposited coating |
GB2548266B (en) * | 2015-11-04 | 2018-06-27 | Payton Planar Magnetics Ltd | Planar transformer components comprising electrophoretically deposited coating |
US10192680B2 (en) | 2015-11-04 | 2019-01-29 | Payton Planar Magnetics Ltd. | Planar transformer components comprising electrophoretically deposited coating |
Also Published As
Publication number | Publication date |
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KR20120014610A (en) | 2012-02-20 |
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