KR20160144824A - Broadband electromagnetic wave shielding Cu-Fe alloy sheet - Google Patents
Broadband electromagnetic wave shielding Cu-Fe alloy sheet Download PDFInfo
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- KR20160144824A KR20160144824A KR1020150081488A KR20150081488A KR20160144824A KR 20160144824 A KR20160144824 A KR 20160144824A KR 1020150081488 A KR1020150081488 A KR 1020150081488A KR 20150081488 A KR20150081488 A KR 20150081488A KR 20160144824 A KR20160144824 A KR 20160144824A
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- copper alloy
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0086—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single discontinuous metallic layer on an electrically insulating supporting structure, e.g. metal grid, perforated metal foil, film, aggregated flakes, sintering
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- Engineering & Computer Science (AREA)
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- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Textile Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention discloses a composite content copper alloy sheet material for shielding broadband electromagnetic waves. The composite iron-alloy sheet material for shielding broadband electromagnetic wave according to the present invention is formed by braiding a plurality of different kinds of copper alloy wires having different composition ratios of copper (Cu) and iron (Fe) . According to this configuration, it is possible to effectively and efficiently shield electromagnetic waves from various types of electromagnetic wave generating sources, ranging from a low-frequency band to a high-frequency band, formed of a copper alloy formed body of a composite content synthesized so as to mix mixed- So that it is possible to secure the function.
Description
The present invention relates to a sheet material for shielding electromagnetic interference (Cu-Fe alloy), and more particularly to a sheet material made of a copper alloy wire or a thin plate having a different content of copper (Cu) and iron (Fe) Which is capable of effectively and efficiently shielding electromagnetic waves of a wide band. The present invention relates to a composite sheet iron alloy sheet material for shielding broadband electromagnetic waves.
With the development of the electronic industry today, electronics products such as electric and electronic devices and information communication devices are being developed with a tendency to become smaller and lighter as they become more multifunctional and complex. According to this tendency, as the density of the electric circuit is increased and the degree of integration is increased, the operating frequency is increased to the high frequency band, and an environment where the electromagnetic wave is easily exposed is being created.
As is well known, electromagnetic waves are a composite wave of an electric field and a magnetic field in the form of energy generated by the use of electricity, in which the electric field is shielded by all conductive objects while the magnetic field is strong permeable . Such electromagnetic waves are constantly emitted from electrical and electronic devices such as household electric appliances, radio communication systems, control systems, power systems, high-frequency devices, and lighting devices used in the vicinity of us, and power lines. Therefore, Such as a malfunction or a deterioration in signal quality.
In addition, it is known that when the electromagnetic wave is exposed to the human body for a long time, the body temperature change and the biorhythm are broken and the possibility of developing into a disease is great. As a result, regulations related to electromagnetic waves are becoming more common and subdivided at home and abroad, and related industries are spurring research and development on electromagnetic wave shielding technology.
BACKGROUND ART [0002] Generally, an electromagnetic wave shielding technique is known as a method of shielding external equipment by shielding the vicinity of an electromagnetic wave generating source, and a method of protecting equipment inside a shielding material to protect it from an external electromagnetic wave generating source.
That is, for example, a method of shielding the vicinity of the electromagnetic wave generating source by using a metal material such as copper, iron, nickel, aluminum, tin, zinc, gold, silver or the like has been widely used.
However, when the metal material as described above is used as an electromagnetic wave shielding material, the weight and manufacturing cost of the device are increased due to the relatively high cost and heavy disadvantage. In order to reduce the size, weight and cost of the electronic device, There is a problem against the flow of use. As a method for solving such a problem, a method of mixing carbon black with synthetic fibers or a method of imparting conductivity by a method of plating metal has been proposed, but the complication of the manufacturing process and the shortening (short-circuit) occurs. Thus, there is a problem in that the practicality is limited.
In particular, according to the conventional electromagnetic wave shielding material and shielding method, it is difficult to effectively and effectively shield electromagnetic waves from various types of electromagnetic wave sources ranging from a low frequency band to a high frequency band.
SUMMARY OF THE INVENTION The present invention has been made in view of the technical background as described above and it is an object of the present invention to solve the problems of the background art described above, It can not be said to have been publicly known to the general public before.
(Patent Document 1) Korean Patent Registration No. 10-0934292
(Patent Document 2) Korean Patent Registration No. 10-1121880
(Patent Document 3) Korean Patent Publication No. 10-1337959
(Patent Document 4) Korean Patent Publication No. 10-13376602
(Patent Document 5) Korean Patent Publication No. 10-1349029
(Patent Document 6) Korean Utility Model Registration No. 20-0341216
SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional electromagnetic wave shielding material according to the background art described above, and it is an object of the present invention to provide a copper alloy having a composition ratio of copper (Cu) The present invention provides a composite sheet iron alloy sheet material for shielding a broadband electromagnetic wave shielding material capable of effectively and efficiently shielding electromagnetic waves over a wide band by forming a copper alloy having a composite content so as to be mixed with a heterogeneous content of copper alloy.
Another object of the present invention is to provide a composite content copper alloy sheet material for shielding a broadband electromagnetic wave which can be molded and manufactured very economically.
In order to achieve the above object, the present invention provides a composite sheet material for shielding broadband electromagnetic wave shielding for broadband electromagnetic waves, comprising a plurality of copper alloy wires each having a different composition ratio of copper (Cu) and iron (Fe) And is formed so as to form a braided sheet-shaped molded article.
According to an aspect of the present invention, the heterogeneous amount of the copper alloy wire may have a structure in which a plurality of copper wire strands are twisted to form a copper alloy wire bundle of a composite content formed in a rope shape.
Accordingly, the composite iron alloy sheet material for shielding broadband electromagnetic waves according to the present invention may have a configuration in which a plurality of rope-shaped composite iron-alloy wire bundles are woven into a net shape to form a sheet-shaped formed article.
According to another aspect of the present invention, the copper alloy wire may have a different diameter and form a molded article in the form of a net braided sheet. Further, the copper alloy wire may be formed of a composite-content copper alloy formed of a wire bundle of rope-shaped wires having different diameters.
According to another aspect of the present invention, a metal coating layer or a metal tape may be further laminated between the copper alloy wires. Such a structure is intended to seal the interstitial space formed between the copper alloy wires, thereby enhancing the precision of electromagnetic wave shielding.
In order to attain the above object, another broad band electromagnetic wave shielding composite iron alloy sheet material according to the present invention is characterized in that a plurality of copper alloy thin plate sheets having different compositions of copper (Cu) and iron (Fe) To form a molded article in the form of a sheet.
According to the present invention, the copper alloy thin plates having different contents may be stacked so as to have different thicknesses.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view illustrating a composite content copper alloy sheet material for shielding a broadband electromagnetic wave according to the present invention. FIG.
2 is a schematic plan view showing an enlarged view of a main portion of a composite content copper alloy sheet material for shielding a broadband electromagnetic wave according to the present invention.
FIG. 3 is a schematic perspective view showing an embodiment in which the wires constituting the composite content copper alloy sheet material for broadband electromagnetic wave shielding according to the present invention are modified to have a bundle shape. FIG.
4 is a schematic perspective view showing a composite iron-alloy sheet material for shielding a broadband electromagnetic wave according to another embodiment of the present invention.
5 is a micrographic view of a copper alloy constituting a sheet material of a copper alloy sheet for a broadband electromagnetic wave shielding according to the present invention.
FIG. 6 is a graph showing electromagnetic wave shielding effect and performance of a copper alloy of a copper alloy sheet material for shielding broadband electromagnetic wave shielding according to the present invention and a conventional copper foil film.
FIGS. 7 and 8 are graphs showing electromagnetic wave shielding effect and performance of different kinds of copper alloy thin films constituting a composite content copper alloy sheet material for broadband electromagnetic wave shielding according to the present invention, respectively, according to frequency bands.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a composite iron alloy sheet material for shielding broadband electromagnetic waves according to the present invention will be described in detail with reference to the accompanying drawings. The following description and accompanying drawings are for understanding the technical structure and operation according to the present invention, and parts that can be easily implemented by those skilled in the art can be omitted.
1 and 2, a composite iron-
The copper alloy of different content to be used in the present invention is obtained by dissolving a mother alloy (CFA 50) composed of 50% of copper (Cu) and 50% of iron (Fe) in a high frequency induction furnace (Cu) and iron (Fe), by adjusting the relative content of the alloys in consideration of the specific gravity of copper (Cu) and iron (Fe).
As described above, the copper alloy having various composition ratios in accordance with the alloy ratio of copper (Cu) and iron (Fe) is actually produced and sold so as to be classified into the symbols shown in Table 1 below.
That is, in order to make the alloy ratio of copper (Cu) and iron (Fe) from the parent alloy CFA 50 to the copper alloy of the desired composition, the specific gravity of copper (Cu) is 8.92 and the specific gravity of iron (Fe) is 7.86 Based on the following calculation formula,
[892 (K - M) / (100 - K) (1.06M + 786)]
It is possible to control the composition ratio of copper (Cu) and iron (Fe).
Here, M is a parent alloy, and K is a copper alloy material having a composition having an alloy ratio of copper (Cu) and iron (Fe) to be designed.
For example, if you want to make the parent alloy CFA 51.7 with CFA 94.6, then M = 51.7, K = 94.6, and the percentage of Cu to be added is calculated as follows.
That is, since the ratio of Cu to be added is calculated as 892 (94.6 - 51.7) / (100 - 94.6) (1.06 X 51.7 + 786) = 8.428, 8.428 times (weight) To produce CFA 94.6.
In fact, a product made from thin copper foil with a thickness of 10μ and wire with a diameter of 0.1Φ by adjusting the alloy ratio of copper (Cu) and iron (Fe) to the alloy composition of the desired composition from the parent alloy CFA 50 produced by Japan Copper Alloy Co., It was introduced through the "1st Metal Japan" held at Tokyo Big Sight, Tokyo Japan from April 16 to 18, 2014.
Korean Patent No. 10-1376602 and Japanese Patent Application Laid-Open No. 10-2015-0029246 each disclose a copper alloy wire rod, a copper alloy cast alloy thin plate for shielding electromagnetic waves, and a manufacturing method thereof.
Accordingly, the
Accordingly, the broad-band electromagnetic wave shielding
Meanwhile, the
FIG. 3 is a schematic perspective view showing an embodiment in which the wires constituting the composite content copper alloy sheet material for broadband electromagnetic wave shielding according to the present invention are modified to have a bundle shape.
Referring to FIG. 3, the
According to another aspect of the present invention, the copper
According to another aspect of the present invention, although not shown by way of example in the drawings, the copper
4 is a schematic perspective view illustrating a composite iron alloy sheet material for shielding broadband electromagnetic waves according to another embodiment of the present invention. Referring to FIG. 4, the composite iron alloy sheet material for shielding broadband electromagnetic waves A plurality of copper alloy
Hereinafter, the excellent effect of electromagnetic shielding of the composite sheet material 100 (200) for broadband electromagnetic wave shielding according to the present invention having the above-described structure will be described in detail.
As can be seen from the microscopic structure shown in FIG. 5, the copper-Fe alloy constituting the composite content copper alloy sheet material 100 (200) for shielding broadband electromagnetic wave according to the present invention has Fe When the electromagnetic waves reach the electromagnetic wave, a magnetic field (motor principle) by an electric field and an electric field (generator principle) by a magnetic field are formed from the inner surfaces of Fe and Cu, and a magnetic field formed in Fe serves as a lightning rod, The magnetic field due to the electric field and the magnetic field due to the magnetic field have opposite directions, causing the hysteresis phenomenon of Fe and disappearing. This phenomenon occurs very momentarily and repeatedly, resulting in a shielding effect.
6 is a graph showing the electromagnetic wave shielding effect and performance of a copper alloy constituting a sheet material of a copper alloy sheet for broadband electromagnetic wave shielding according to the present invention and a conventional copper foil film, (CFA) exhibits about 70 to 90 dB at a thickness of 30 탆. These results show that the electromagnetic wave shielding effect of the copper alloy (CFA) is very excellent when the electromagnetic wave intensity and the shielding effect defined in Table 2 below are considered. Especially, the shielding effect at 1 MHz to 1 GHz Can be obtained.
FIG. 7 shows the effect of shielding the magnetic field of the CFA 95-10 .mu.m thin film (Foil), and FIG. 8 shows the effect of shielding the magnetic field of the CFA90-10 .mu.m thin film (Foil) The electromagnetic wave shielding effect in the high frequency band of the copper alloy is remarkably improved.
Accordingly, the broadband electromagnetic wave shielding composite content copper
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that various modifications may be made, and such modifications are intended to fall within the scope of the appended claims.
100, 200: Composite content Copper alloy sheet material
110 ~ 160: Heterogeneous content Copper alloy wire (bundle structure)
111 ~ 117: Dissimilarity Content Copper alloy unit wire
210 ~ 240: heterogeneous content Copper alloy steel sheet
Claims (7)
The different content of the copper alloy wire is formed into a rope-shaped copper alloy wire bundle formed by twisting a plurality of ropes, and a plurality of rope-like copper alloy wire bundles are braided to form a sheet- It is characterized by a composite content of copper alloy sheet for shielding broadband electromagnetic wave.
Wherein the copper alloy wire has different diameters. ≪ RTI ID = 0.0 > 11. < / RTI >
Wherein a metal coating layer is further formed between the copper alloy wires.
And a metal tape is further laminated on the copper alloy wire.
Wherein the different amounts of the copper alloy thin plates are laminated so as to have different thicknesses.
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| KR1020150081488A KR101773928B1 (en) | 2015-06-09 | 2015-06-09 | Broadband electromagnetic wave shielding Cu-Fe alloy sheet |
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| KR1020150081488A KR101773928B1 (en) | 2015-06-09 | 2015-06-09 | Broadband electromagnetic wave shielding Cu-Fe alloy sheet |
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| KR101773928B1 KR101773928B1 (en) | 2017-09-01 |
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| KR100934292B1 (en) | 2002-08-08 | 2009-12-29 | 다이니폰 인사츠 가부시키가이샤 | Electromagnetic shielding sheet |
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| KR101337959B1 (en) | 2012-03-19 | 2013-12-09 | 현대자동차주식회사 | Composite for shielding electromagnetic wave |
| KR101349029B1 (en) | 2012-04-04 | 2014-01-10 | 현대자동차주식회사 | Composite for shielding broadband electromagnetic wave |
| KR101376602B1 (en) | 2013-09-06 | 2014-04-02 | (주)대한엠앤씨 | Electromagnetic wave shielding fe-cu foil and manufacturing method for the same |
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| JP2003152386A (en) * | 2001-11-15 | 2003-05-23 | Toyo Kohan Co Ltd | Electromagnetic wave shielding filter |
| JP2010098019A (en) | 2008-10-15 | 2010-04-30 | Fujikura Ltd | Electromagnetic wave shielding mesh |
| JP5282320B2 (en) * | 2011-05-27 | 2013-09-04 | 松山毛織株式会社 | Electromagnetic shielding fabric, electromagnetic shielding sheet, electromagnetic shielding material, and electromagnetic shielding casing |
| JP2014086620A (en) * | 2012-10-25 | 2014-05-12 | Adn:Kk | Electromagnetic wave shielding member and production method of electromagnetic wave shielding member |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100934292B1 (en) | 2002-08-08 | 2009-12-29 | 다이니폰 인사츠 가부시키가이샤 | Electromagnetic shielding sheet |
| KR101121880B1 (en) | 2003-04-18 | 2012-03-19 | 다이니폰 인사츠 가부시키가이샤 | Electromagnetic shielding sheet, front plate for display, and method for producing electromagnetic shielding sheet |
| KR200341216Y1 (en) | 2003-11-19 | 2004-02-11 | 주식회사 웨이브솔루션 | Sheet matal pair against electron wave |
| KR101337959B1 (en) | 2012-03-19 | 2013-12-09 | 현대자동차주식회사 | Composite for shielding electromagnetic wave |
| KR101349029B1 (en) | 2012-04-04 | 2014-01-10 | 현대자동차주식회사 | Composite for shielding broadband electromagnetic wave |
| KR101376602B1 (en) | 2013-09-06 | 2014-04-02 | (주)대한엠앤씨 | Electromagnetic wave shielding fe-cu foil and manufacturing method for the same |
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