WO2003081973A1 - Feuille de blindage anti-ondes electromagnetiques, cable de transmission a blindage anti-ondes electromagnetiques et lsi a blindage anti-ondes electromagnetiques - Google Patents

Feuille de blindage anti-ondes electromagnetiques, cable de transmission a blindage anti-ondes electromagnetiques et lsi a blindage anti-ondes electromagnetiques Download PDF

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Publication number
WO2003081973A1
WO2003081973A1 PCT/JP2003/003773 JP0303773W WO03081973A1 WO 2003081973 A1 WO2003081973 A1 WO 2003081973A1 JP 0303773 W JP0303773 W JP 0303773W WO 03081973 A1 WO03081973 A1 WO 03081973A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnetic wave
wave shielding
layer
lsi
shielding sheet
Prior art date
Application number
PCT/JP2003/003773
Other languages
English (en)
Japanese (ja)
Inventor
Masayoshi Shindo
Asaharu Nakagawa
Masaaki Sasada
Original Assignee
Toyo Services,Corp.
E.M.Techno Co.,Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Services,Corp., E.M.Techno Co.,Ltd. filed Critical Toyo Services,Corp.
Priority to JP2003579522A priority Critical patent/JPWO2003081973A1/ja
Publication of WO2003081973A1 publication Critical patent/WO2003081973A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/552—Protection against radiation, e.g. light or electromagnetic waves
    • 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
    • H05K9/0098—Shielding materials for shielding electrical cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1008—Features relating to screening tape per se
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the present invention relates to an electromagnetic wave shielding sheet and its use. More specifically, the present invention relates to a wired transmission cable for digital information or an EMC (a mechanism that does not emit or receive unnecessary radiation) in a large-scale integrated circuit (LSI). The present invention relates to an electromagnetic wave shielding sheet for improvement, an electromagnetic wave shielding transmission cable to which the sheet is applied, and an electromagnetic wave shielding LSI. Background art
  • a transmission cable called “twisted pair” For transmission of digital information such as LAN or ADSL, a transmission cable called “twisted pair” is frequently used. When information is transmitted using this transmission cable, unbalanced components (common mode) due to the unbalanced operation of the semiconductor are generated, and EMC is degraded.
  • a cable 6 in which a plurality of core wires 4 are covered with an insulator 7 is made to penetrate through a cylindrical sintered ferrite 8, and is generated by a current flowing through the cable 6.
  • the crossing of the magnetic flux with the ferrite causes hysteresis loss and suppresses unnecessary radiation due to unbalanced components.
  • Fig. 7 (a) When information is transmitted by cable, there are two types of transmission modes: normal mode (balanced component) shown in Fig. 7 (a) and common mode (unbalanced component) shown in Fig. 7 (b).
  • normal mode balanced component
  • common mode unbalanced component
  • Fig. 7 (b) In the normal mode in FIG. 7 (a), since the electric field 1 and the magnetic field 2 are concentrated at the center of the core 4 of the cable 6, external radiation is negligibly small.
  • the common mode shown in Fig. 7 (b) the electric field 1 and the magnetic field 2 of the multiple core wires 4 (only two wires are shown for simplicity in the figure) spread outside, and electromagnetic energy spreads outside the cable Radiated. 15 indicates a virtual earth.
  • a part of the insulator jacket 7 of the cable 6 is covered with the sintered ferrite core 3, and the normal mode in which the electromagnetic energy is concentrated in the center.
  • the radiation In radiation mode, the radiation is negligible (Fig. 8 (a)), and the radiation is suppressed by giving a large hysteresis loss to the common mode where electromagnetic energy spreads (Fig. 8 (b)).
  • a large magnetic field is generated when the common mode current is large (the impedance is low). If you do not cross the bird, you will not get a big loss.
  • the effect is low at the high impedance point.
  • the frequency limit called the snake's limit (Snoek's 1 imit) reduces the effect of the magnetic material at frequencies above 300 MHz, so it cannot be used in recent gigabit transmission.
  • the height of the impedance of the cable periodically fluctuates along the electrical length of the cable, which makes the above problem even more difficult.
  • EMC measures electromagnetic waves radiated from LSI
  • the conventional EMC countermeasure employs the configuration shown in Fig.12.
  • reference numeral 102 denotes an LSI, and the surface thereof is sealed with a silicone compound 102 a.
  • the LSI 102 is mounted on the electronic substrate 103, and is radiated from the LSI 102 by attaching the magnetic sheet 111 to the upper surface sealed with the silicone compound 101a. Electromagnetic waves 104 are suppressed.
  • the magnetic material sheet 111 is generally made of magnetic material powder hardened with a binder, and usually has a thickness of about 1 mm.
  • a simple method shown in Fig. 13 is used to measure the radiation attenuation rate of the magnetic material sheet 111 used in the above EMC structure, and the radio wave excited by the signal source 108 is used instead of the LSI.
  • the radiating micro-loop antenna 105 is placed close to the magnetic sheet 111.
  • the size of the distance d is determined by the thickness of the silicone compound 102a provided on the LSI, and is usually about 1 mm.
  • the electromagnetic wave transmitted through the magnetic sheet 111 is received by the receiving loop antenna 105 arranged close to the opposite side, and the amount of transmission by the magnetic sheet 111 is measured by the receiving meter 106. This measurement The result obtained at a constant is called the near-near-point measurement result.
  • a curve a indicates a case where the thickness of the magnetic sheet 11 is 1 mm
  • a curve b indicates a case where the thickness is 0.09 mm. If the thickness of the magnetic material is 1 mm, an attenuation of about 10 to 15 dB can be obtained.
  • the actual shielding of the electronic substrate is not limited to close points, and as shown in Fig. 14, shielding attenuation at a distance D (distant point) several tens of millimeters or several meters away is also required. Is done. In this case, the receiving point is measured not using a close loop but using a normal antenna 7. This is called the far-one near-point measurement result.
  • the curve a shows the case where the thickness of the magnetic material sheet is lmm
  • the curve b shows the case where the thickness is 0.09 mm. It should be noted here that the amount of radiation increases when the thickness of the magnetic sheet is 1 mm, which is a characteristic contrary to the purpose. If the thickness of the sheet is 0.09 mm, the near-near-point shielding effect is lost as shown in Fig.15.
  • a first object of the present invention is to provide an electromagnetic wave shielding sheet that prevents radiation of electromagnetic waves and does not receive external electromagnetic interference.
  • a resistance layer or a conductor layer (B or
  • An electromagnetic wave shielding sheet characterized by laminating A) and a magnetic layer (C) in which magnetic fine particles are fixed with a dielectric binder.
  • (B) is a resistance layer having an electric resistance of 10-2-103 ⁇ / port, and an insulating layer is further provided on one surface of the laminate comprising (B or A) and (C), and a reinforcement is provided on the other surface. It is a preferred embodiment that the layers are stacked, and that the magnetic fine particles constituting the magnetic layer (C) have an initial magnetic permeability of 5 or more.
  • a second object of the present invention is to provide an electromagnetic wave for a transmission cable for coating the transmission cable. Provide a shielding sheet.
  • the structure of the invention is an electromagnetic wave shielding sheet for a transmission cable, wherein the electromagnetic wave shielding sheet is used for electromagnetic wave shielding of a transmission cable.
  • a resistance layer or a conductor layer (8 or) is laminated on the rain side of the magnetic material layer (C); and (B) is a resistance layer having an electric resistance of 1-102 ⁇ / port; It is a preferred embodiment that (B) is a resistance layer having an electric resistance of 1 to 60 ⁇ / port.
  • a third object of the present invention is to provide an LSI coating electromagnetic wave shielding sheet for coating LSI.
  • the structure of the present invention is an electromagnetic wave shielding sheet for an LSI, wherein the electromagnetic wave shielding sheet is used for electromagnetic wave shielding of an LSI.
  • (B or A) is laminated on one side of the magnetic material layer (C), and (B) is a resistance layer or a conductor layer having an electric resistance of 2 ⁇ / b or less.
  • the thickness of the magnetic layer (C) is 0.05 to 0.5 mm, 1 m away from the electromagnetic wave source as defined in the text. It is a preferred embodiment that the radiated electric field intensity attenuation measured at the
  • a fourth object of the present invention is to provide an electromagnetic wave shielded transmission cable capable of realizing a common mode suppressing action even at several gigabits regardless of impedance.
  • the structure of the invention is an electromagnetic wave shielding transmission cable characterized in that a part or the entire length of the transmission cable in the longitudinal direction is covered with the electromagnetic wave shielding sheet or the electromagnetic wave shielding sheet for a transmission cable.
  • an electromagnetic wave shielding transmission cable characterized in that two wires for transmitting a signal are arranged adjacent to each other, and a part or the entire length of the multi-core cable in the longitudinal direction is covered.
  • an electromagnetic wave shielding transmission cable in which a cable is covered by using a magnetic core and an electromagnetic wave shielding sheet in combination.
  • a fifth object of the present invention is to provide an electromagnetic wave shielding L SI having an electromagnetic wave suppressing effect in any case between a far point and a near point and between a near point and a near point.
  • the structure of the invention is an electromagnetic wave shielding LSI in which the upper surface of the LSI is covered with the electromagnetic wave shielding sheet or the electromagnetic wave shielding sheet for LSI.
  • the magnetic layer (C) is covered with an electromagnetic wave shielding sheet so as to be on the LSI side.
  • FIG. 1 is a cross-sectional view illustrating the electromagnetic wave shielding tape of the present invention.
  • FIG. 2 is a cross-sectional view showing a part of the electromagnetic wave shielding transmission cable of the present invention around which the electromagnetic wave shielding tape of FIG. 1 is wound.
  • 3 (a) to 3 (c) are explanatory diagrams each showing an embodiment of the electromagnetic wave shielded transmission cable of the present invention.
  • 4 (a) and 4 (b) are explanatory views showing an embodiment of the electromagnetic wave shielding transmission cable of the present invention when the magnetic core and the electromagnetic wave shielding sheet are used together.
  • FIGS. 5A and 5B are measured data graphs each showing the effect of the first embodiment of the present invention.
  • FIG. 6 is an explanatory diagram of a conventional electromagnetic wave shielding cable.
  • Figs. 7 (a) and 7 (b) are explanatory diagrams showing the state of the electric field and the magnetic field of the transmission cable, respectively.
  • FIGS. 8 (a) and 8 (b) are explanatory diagrams showing the effect when the transmission cable is covered with a lossy body.
  • FIG. 9 is a schematic diagram showing the electromagnetic wave shielding L SI of the present invention.
  • FIG. 10 is a cross-sectional view illustrating the LSI electromagnetic wave shielding sheet used in the present invention.
  • FIG. 11 is a graph showing frequency-radiation intensity characteristics of the LSI electromagnetic wave shielding sheet manufactured in the example of the present invention.
  • FIG. 12 is a schematic diagram showing a conventional electromagnetic shielding LSI.
  • FIG. 13 is an explanatory diagram of a conventional method for evaluating an LSI electromagnetic wave shielding sheet.
  • FIG. 14 is an explanatory diagram of another evaluation method of a conventional LSI electromagnetic wave shielding sheet.
  • FIG. 15 is a graph showing frequency-radiation attenuation characteristics of a conventional LSI electromagnetic wave shielding sheet.
  • Fig. 16 is a graph showing the frequency-radiation intensity characteristics of a conventional LSI electromagnetic shielding sheet.
  • FIGS. 17 (a) and (b) are explanatory diagrams illustrating the radiation intensity measurement method performed in Example 3, respectively.
  • FIG. 17 (a) is an overall view
  • FIG. 17 (b) is a loop antenna.
  • the resistance layer B refers to a structure in which a resistor is formed in a sheet shape, and the resistor refers to a resistor having an electrical resistance of 10-2 to 103 ⁇ / port.
  • the conductor layer A is a sheet formed of a conductor, and the conductor has an electrical resistance of 10-2 ⁇ / 0 1 or less.
  • the sheet referred to in the present invention refers to a concept including all shapes such as a tape shape, a tube shape, a ribbon shape, a wide rug shape and the like.
  • a tape-like material is preferable. In this case, it is referred to as an electromagnetic wave shielding tape.
  • FIG. 1 shows an example of the electromagnetic wave shielding tape for a transmission cable of the present invention in a cross section orthogonal to the longitudinal direction.
  • the electromagnetic wave shielding tape 5 is formed by laminating a magnetic layer C between the conductor layer ⁇ ⁇ (or the resistance layer B) and the resistance layer B.
  • the intermediate magnetic layer C is composed of a mixture of magnetic fine particles and a dielectric binder, and the magnetic fine particles are fixed by a dielectric binder.
  • the electromagnetic wave shielding tape 5 is wound along the longitudinal direction of the transmission cable 6 so as to cover a part or the entire length of the transmission cable 6, thereby radiating electromagnetic waves from the cable 6 as described later. It also has the effect of not receiving it from outside.
  • the cable 6 has a central conductor 40 It is formed by covering the periphery with an insulator 7 such as rubber or soft resin.
  • the electromagnetic wave shielding tape 5 is wound around the cable 6 with the resistance layer B inside.
  • the winding method is not particularly limited, but it is preferable that the cable 6 be continuously wound spirally obliquely with respect to the longitudinal direction of the cable 6.
  • the resistance layer B has an electric resistance of 10—2 to: I 03 ⁇ / port, and preferably has an electric resistance of 1 to 102 ⁇ / b or more.
  • metal such as aluminum, silver, and nickel, metal oxides such as ITO (indium tin oxide), tin oxide, and conductors such as carbon black are coated, deposited, and sprayed on plastic rubber.
  • a sheet having a film formed by such a method or a sheet in which these substances are plastically mixed by an ordinary method can be used.
  • magnetic fine particles are fixed with a dielectric binder.
  • the magnetic fine particles preferably have an initial magnetic permeability of 5 or more, and fine particles of a metal such as nickel, perm or amorphous alloy, or a metal compound such as ferrite or carbonyl iron can be used.
  • a magnetic tape such as a magnetic tape may be used.
  • waste videotape can be used more preferably because it can also serve as resource recycling.
  • the electromagnetic wave shielding tape for a transmission cable of the present invention has a configuration in which the magnetic layer C is laminated in a San German manner between the conductor layer A (or the resistance layer B) and the resistance layer B as described above. 1) In addition to covering the circumference of the cable with the magnetic material layer C and adding the resistance layer B, it is possible to increase the attenuation even at high electric field (high impedance) points. it can. In addition, (2) the cable is covered with an electromagnetic wave shielding tape that acts both as a magnetic substance and a dielectric substance in which fine ferrite particles are fixed with a dielectric binder instead of sintered and formed ferrite, so that the attenuation function is reduced. The possible frequency can be extended to 10 to 20 times that of the sintered ferrite.
  • a magnetic field H is generated around the central conductor 40.
  • This magnetic field H has a large value when the load impedance is low, and receives a hysteresis loss due to the magnetic layer C of the electromagnetic wave shielding tape 5.
  • high load impedance At the point, the electric field E increases and the resistance is lost by the resistance layer B. That is, the electromagnetic wave shielding tape 5 can perform a function of giving a loss to the common mode electromagnetic energy regardless of the level of the impedance of the cable 6.
  • the special effect of the electromagnetic wave shielding tape 5 is that if there is no magnetic layer C, the resistance layer B adheres to the conductor layer A, so that the high-frequency electric field E applied to the resistance layer B is Short-circuited to the resistance layer B, the actual resistance value is lost, and transmission loss is lost.
  • the electromagnetic wave shielding tape 5 since the electromagnetic wave shielding tape 5 has the magnetic layer C, the effect of the conductor layer A on the resistance layer B can be greatly reduced by the presence of the magnetic layer C.
  • the resistance layer B preferably has an electric resistance of 1 to 102 ⁇ / port, and more preferably 1 to 60 ⁇ / port.
  • the conductor layer (A) at this time is not particularly limited as long as it is made of a conductor having an electric resistance of 10 to 2 ⁇ or less.
  • a metal foil such as copper or aluminum, or a film or a knitted fabric formed by forming a conductive thin film on a surface by plating, vapor deposition, spraying, or the like can be used.
  • the electromagnetic wave shielding LSI is generally used in a state sealed with a silicone compound.
  • the electromagnetic wave shielding sheet when the electromagnetic wave shielding sheet is attached to the upper surface of the above-mentioned silicone compound-encapsulated LSI, the electromagnetic wave shielding sheet includes a magnetic layer C in which magnetic fine particles are fixed with a dielectric binder.
  • a sheet having a structure in which a resistance layer having a resistance of 100 ⁇ / b or less or a conductor layer B or A is laminated on the outer surface is used.
  • FIG. 9 illustrates an electromagnetic wave shielding L S I of the present invention. ⁇
  • the surface of the LSI 102 is sealed with a silicone compound 102 a and attached to the electronic substrate 103. Silicone compound of SI 102
  • the electromagnetic wave shielding sheet 101 is spread over the upper surface sealed with 2a, and the electromagnetic wave shielding sheet 101 suppresses the electromagnetic waves radiated from the LSI 102.
  • FIG. 10 is a cross-sectional view illustrating an electromagnetic wave shielding sheet attached to the upper surface of the LSI like the above.
  • the electromagnetic wave shielding sheet 101 is formed of a laminate of a magnetic layer C and a conductor layer A.
  • the magnetic layer C is a mixture of magnetic fine particles and a dielectric binder, and has a configuration in which the magnetic fine particles in a dispersed state are fixed by the dielectric binder.
  • the magnetic fine particles refer to fine metal particles such as nickel, permalloy, amorphous alloy, ferrite, and carbonyl iron.
  • the magnetic layer C formed by mixing and dispersing the magnetic fine particles with the dielectric binder is preferably such that the initial magnetic permeability of the magnetic fine particles constituting the magnetic layer is large, and usually 5 or more.
  • the magnetic layer C may actually be a stack of a plurality of magnetic tapes such as a magnetic tape, and it is particularly preferable to use a waste video tape from the viewpoint of resource recycling.
  • the thickness of the magnetic material layer C is not particularly limited, and should be optimized according to the constant of the magnetic material. However, unlike the conventional magnetic material sheet, the thickness is not required to be as large as 1 mm. mm or less, preferably about 0.025 to 0.5 mm is sufficient.
  • the conductor layer A is composed of a conductor having an electric resistance of 10-2 ⁇ / b or less.
  • a metal foil such as copper or aluminum, or a conductive thin film formed by plating, depositing, or spraying a conductive substance on a resin film, a knitted fabric, or the like can be used.
  • the conductor layer A functions as a reflector for preventing external electromagnetic interference.
  • the conductor layer A induces a resonance phenomenon at a frequency where the electrical length of one side is near a half wavelength, and operates an antenna called a patch antenna to impair the suppression effect.
  • the resonance can be suppressed by using a resistance layer B instead of the conductor layer A, or by further attaching a resistance layer on the conductor layer A.
  • a resistance layer B can be used instead of the conductor layer A, and the shielding effect is almost the same.
  • the electric resistance of the resistance layer B is 103 ⁇ / ⁇ 1 ⁇ Lower, preferably 10—2 to 20 ⁇ / mouth.
  • an adhesive may be used, or a nameplate of the LSI may be printed or a sticker may be attached to the surface of the electromagnetic wave shielding sheet.
  • the electromagnetic wave shielding sheet has a structure in which a conductor layer or a resistance layer is provided on the back surface of the magnetic layer, and the thickness of the sheet is adjusted so as to approximate the impedance of the current source to the impedance of the current source.
  • the electromagnetic wave from the LSI will be absorbed and attenuated by the loss of the magnetic layer.
  • the electromagnetic wave suppression of the attenuation between both near and near points and between near and far points is provided. The effect can be realized.
  • Amorphous alloy fine particles with an average particle size of 15 ⁇ m are placed between conductor layer A with a weight per unit area of 260 g / m 2 and thickness of 100 m and resistance layer B with an electrical resistance of 30 / port.
  • An electromagnetic wave shielding tape laminated to interpose a magnetic layer C having a thickness of 110 ⁇ m fixed with an adhesive of 60 g / m 2 was prepared.
  • this electromagnetic wave shielding tape was wound around a transmission cable (100BASE-T, Category-5) widely used as a standard LAN cable over a length of 260 mm.
  • Fig. 4 shows an example in which a magnetic core and an electromagnetic wave shielding sheet are used together.
  • a transmission cable is connected to a cylindrical sintered fiber core 3 having an inner diameter of 7 mm, an outer diameter of 10 mm, and a length of 28 mm.
  • the end of the fiber core 3 and a part of the cable 6 are wound and covered with an electromagnetic wave shielding tape 5.
  • FIG. 4 (b) shows a state in which the surface of the light core 3 is covered with a conductor 16 made of aluminum foil, and the end of the conductor 16 is brought into contact with an electromagnetic wave shielding tape 5.
  • Figs. 5 (a) and 5 (b) show the operating characteristics of the high and low frequencies measured for the above three connection cases, respectively.
  • Fig. 5 (a) shows the high frequency characteristics
  • Fig. 5 (b) shows the low frequency characteristics.
  • (i) represents the connection in FIG. 3 (a)
  • ( ⁇ ) represents the connection in FIG. 3 (b)
  • (iii) represents the connection in FIG. 3 (c).
  • the sintered ferrite core is coated on the cable as shown in Fig. 4 (a), and the attenuation when the electromagnetic wave shielding tape is wound is shown in Fig.
  • Silicone compound encapsulation A magnetic material layer C in which a 0.09 mm thick ferromagnetic oxide-based magnetic material powder is fixed with a plastic binder on the upper surface of the LSI An electromagnetic wave shielding LSI having an electromagnetic wave shielding sheet made of a laminate with the conductor layer A was manufactured.
  • the electromagnetic wave absorption attenuation data at near and far points of this electromagnetic wave shielding LSI was measured, and the results shown in Fig. 11 were obtained. From Fig. 11, it was confirmed that the suppression was 15 dB at the low frequency of 0.01 to 0.1 GHz and about 5 dB at the high frequency of 2 GHz. The attenuation between near and near points was extremely large and could not be measured.
  • the electromagnetic wave shielding sheet was about 1/10 thicker than the conventional magnetic sheet shown in FIG. 12, so it was lightweight and could be manufactured at low cost.
  • Example 3
  • a magnetic layer C having a thickness shown in Table 1 was laminated on a resistance layer B having an electrical resistance of 1 ⁇ / port and a thickness of 0.015 mm to prepare an electromagnetic wave shielding sheet for LSI.
  • This electromagnetic wave shielding sheet 101 is laminated on a 1 mm thick styrofoam 16 as shown in Fig. 17 (a), and a small loop antenna 105 as a source of electromagnetic waves is placed underneath.
  • This small loop antenna 105 is made of a semi-rigid cable with a diameter of 3.3 mm, forms a loop with an outer diameter of 8 mm, and has a notch at the center as shown in Fig. 17 (b) to avoid the effect of the electric field. 0 9 is included.
  • the present invention relates to an electronic device, particularly a transmission cable, an electromagnetic wave shielding sheet that prevents radiation of electromagnetic waves emitted from an LSI and is not affected by external electromagnetic waves, or an electromagnetic wave shielding transmission cable coated with this sheet.
  • This is an electromagnetic shielding LSI, and is extremely useful in the field of electronic equipment.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Communication Cables (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

Cette invention concerne une feuille de blindage contre les ondes électromagnétiques comprenant, superposées les unes aux autres, une couche de résistance (B) d'une résistance électrique maximum de 103 Φ/< ou une couche conductrice (A) et une couche à corps magnétique (C) sur laquelle de fines particules de matière magnétique sont fixées par un liant diélectrique. La feuille à blindage anti-ondes électromagnétiques convient tout particulièrement bien pour un câble de transmission ou une LSI et un câble de transmission à blindage contre les ondes électromagnétiques ou une LSI à blindage contre les ondes électro-magnétiques recouvertes d'une telle feuille qui supprime son propre rayonnement électromagnétique et est insensible à une onde électromagnétique extérieure.
PCT/JP2003/003773 2002-03-27 2003-03-27 Feuille de blindage anti-ondes electromagnetiques, cable de transmission a blindage anti-ondes electromagnetiques et lsi a blindage anti-ondes electromagnetiques WO2003081973A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003579522A JPWO2003081973A1 (ja) 2002-03-27 2003-03-27 電磁波遮蔽用シート、電磁波遮蔽伝送用ケーブル及び電磁波遮蔽ｌｓｉ

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002-89103 2002-03-27
JP2002089103 2002-03-27
JP2002-105142 2002-04-08
JP2002105142 2002-04-08

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JP2005136310A (ja) * 2003-10-31 2005-05-26 Matsushita Electric Ind Co Ltd 雑音低減具
JP2006093412A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd 電磁波ノイズ抑制体、その製造方法および使用方法
JP2006093416A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd 電磁波ノイズ抑制シート、その製造方法および使用方法
JP2006093413A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd Ｅｍｃ対策部材およびｅｍｃ対策方法
JP2006093414A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd 伝導ノイズ抑制体および伝導ノイズ対策方法
JP2008270714A (ja) * 2007-12-17 2008-11-06 Taiyo Yuden Co Ltd 電磁波遮蔽シート
WO2010081721A1 (fr) 2009-01-16 2010-07-22 Carl Zeiss Smt Ag Système de lithographie euv et câble pour celui-ci
KR101020388B1 (ko) 2002-06-28 2011-03-08 에버스핀 테크놀러지스, 인크. 자성 재료를 포함하는 전자 회로를 위한 자기 차폐
WO2011122120A1 (fr) * 2010-03-31 2011-10-06 シャープ株式会社 Ligne de câblage, dispositif d'affichage et récepteur de télévision
JP2012502479A (ja) * 2008-09-04 2012-01-26 スリーエム イノベイティブ プロパティズ カンパニー 電磁干渉抑制ハイブリッドシート
WO2012114587A1 (fr) * 2011-02-25 2012-08-30 Kagawa Seiji Feuille de suppression de bruit en champ proche
KR20140060941A (ko) * 2012-11-13 2014-05-21 엘에스전선 주식회사 차폐 케이블
KR20140091171A (ko) * 2013-01-10 2014-07-21 엘에스전선 주식회사 전자기파차폐 케이블
JP2015065389A (ja) * 2013-09-26 2015-04-09 新日鉄住金化学株式会社 電磁波ノイズ抑制体及び回路基板
JP2019021837A (ja) * 2017-07-20 2019-02-07 信越ポリマー株式会社 電磁波シールドフィルム及びその製造方法、並びに電磁波シールドフィルム付きプリント配線板及びその製造方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193621U (ja) * 1984-05-31 1985-12-23 株式会社島津製作所 ノイズ防止用チユ−ブ
JPH1084195A (ja) * 1996-09-09 1998-03-31 Tokin Corp 複合磁性体、及び複合磁性体を用いた電磁干渉抑制体
JPH10241925A (ja) * 1997-02-21 1998-09-11 Nippon Telegr & Teleph Corp <Ntt> ノイズフィルタテープ
JPH1187980A (ja) * 1997-09-02 1999-03-30 Tokin Corp 複合磁性シート
JPH11121976A (ja) * 1997-10-15 1999-04-30 Kitagawa Ind Co Ltd 電子部品用放熱構造
JPH11195893A (ja) * 1997-12-27 1999-07-21 Tokin Corp 電磁干渉抑制体
JP2000030943A (ja) * 1998-07-14 2000-01-28 Nippon Telegr & Teleph Corp <Ntt> ノイズフィルタテープおよびノイズフィルタケーブル
JP2000082346A (ja) * 1998-06-29 2000-03-21 Harness Syst Tech Res Ltd シ―ルドテ―プ及びこれを用いたシ―ルド線
US6143406A (en) * 1998-03-06 2000-11-07 Murata Manufacturing Co., Ltd. Magnetic composite tape for inhibiting radiation noise and radiation noise inhibiting component using same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193621U (ja) * 1984-05-31 1985-12-23 株式会社島津製作所 ノイズ防止用チユ−ブ
JPH1084195A (ja) * 1996-09-09 1998-03-31 Tokin Corp 複合磁性体、及び複合磁性体を用いた電磁干渉抑制体
JPH10241925A (ja) * 1997-02-21 1998-09-11 Nippon Telegr & Teleph Corp <Ntt> ノイズフィルタテープ
JPH1187980A (ja) * 1997-09-02 1999-03-30 Tokin Corp 複合磁性シート
JPH11121976A (ja) * 1997-10-15 1999-04-30 Kitagawa Ind Co Ltd 電子部品用放熱構造
JPH11195893A (ja) * 1997-12-27 1999-07-21 Tokin Corp 電磁干渉抑制体
US6143406A (en) * 1998-03-06 2000-11-07 Murata Manufacturing Co., Ltd. Magnetic composite tape for inhibiting radiation noise and radiation noise inhibiting component using same
JP2000082346A (ja) * 1998-06-29 2000-03-21 Harness Syst Tech Res Ltd シ―ルドテ―プ及びこれを用いたシ―ルド線
JP2000030943A (ja) * 1998-07-14 2000-01-28 Nippon Telegr & Teleph Corp <Ntt> ノイズフィルタテープおよびノイズフィルタケーブル

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101020388B1 (ko) 2002-06-28 2011-03-08 에버스핀 테크놀러지스, 인크. 자성 재료를 포함하는 전자 회로를 위한 자기 차폐
JP2005136310A (ja) * 2003-10-31 2005-05-26 Matsushita Electric Ind Co Ltd 雑音低減具
JP4611698B2 (ja) * 2004-09-24 2011-01-12 信越ポリマー株式会社 Ｅｍｃ対策部材およびｅｍｃ対策方法
JP2006093412A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd 電磁波ノイズ抑制体、その製造方法および使用方法
JP2006093416A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd 電磁波ノイズ抑制シート、その製造方法および使用方法
JP2006093413A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd Ｅｍｃ対策部材およびｅｍｃ対策方法
JP2006093414A (ja) * 2004-09-24 2006-04-06 Shin Etsu Polymer Co Ltd 伝導ノイズ抑制体および伝導ノイズ対策方法
JP4611699B2 (ja) * 2004-09-24 2011-01-12 信越ポリマー株式会社 伝導ノイズ抑制体および伝導ノイズ対策方法
JP4611697B2 (ja) * 2004-09-24 2011-01-12 信越ポリマー株式会社 電磁波ノイズ抑制体およびその使用方法
JP4611700B2 (ja) * 2004-09-24 2011-01-12 信越ポリマー株式会社 電磁波ノイズ抑制シートおよびその使用方法
JP2008270714A (ja) * 2007-12-17 2008-11-06 Taiyo Yuden Co Ltd 電磁波遮蔽シート
JP2012502479A (ja) * 2008-09-04 2012-01-26 スリーエム イノベイティブ プロパティズ カンパニー 電磁干渉抑制ハイブリッドシート
DE102009005340A1 (de) 2009-01-16 2010-07-22 Carl Zeiss Smt Ag EUV-Lithographieanlage und Kabel dafür
WO2010081721A1 (fr) 2009-01-16 2010-07-22 Carl Zeiss Smt Ag Système de lithographie euv et câble pour celui-ci
WO2011122120A1 (fr) * 2010-03-31 2011-10-06 シャープ株式会社 Ligne de câblage, dispositif d'affichage et récepteur de télévision
WO2012114587A1 (fr) * 2011-02-25 2012-08-30 Kagawa Seiji Feuille de suppression de bruit en champ proche
US8952273B2 (en) 2011-02-25 2015-02-10 Seiji Kagawa Near-field noise suppression sheet
KR20140060941A (ko) * 2012-11-13 2014-05-21 엘에스전선 주식회사 차폐 케이블
KR20140091171A (ko) * 2013-01-10 2014-07-21 엘에스전선 주식회사 전자기파차폐 케이블
KR102032566B1 (ko) 2013-01-10 2019-10-16 엘에스전선 주식회사 전자기파차폐 케이블
JP2015065389A (ja) * 2013-09-26 2015-04-09 新日鉄住金化学株式会社 電磁波ノイズ抑制体及び回路基板
JP2019021837A (ja) * 2017-07-20 2019-02-07 信越ポリマー株式会社 電磁波シールドフィルム及びその製造方法、並びに電磁波シールドフィルム付きプリント配線板及びその製造方法

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