摘要:
A wave absorber of the present invention includes a sequentially laminated structure including an conductor layer (11) made of a conductive material; a first dielectric layer (polycarbonate substrate (12) and bismaleimide-triazine substrate (13)) made of one layer or a multilayer of a dielectric material; and a patterned layer (14) including a plurality of a pattern made of the conductive material, wherein the conductor layer, the first dielectric layer, and the patterned layer are laminated sequentially, and each pattern in the patterned layer (14) is different from other adjacent patterns with respect to at least one of size and shape. Therefore, the wave absorber has sufficient reflection-attenuating capability to prevent communication failure caused by a reflection of a radio wave and so on, can be thin-sized and reduced in weight, and has a wide-band attenuation property.
摘要:
A film structure for absorbing electromagnetic wave and manufacturing method thereof is provided. The multilayer film structure is composed of a plurality of polymer films (100) and a plurality of permeability films (104). The polymer films (100) have a multi-film stacking structure and the polymer films are composed of a carbon group compound structure (102). The permeability films are formed on each surface of the polymer films. Thus, every neighboring permeability films will have magnetic moments in opposite direction, and all the emitted electromagnetic waves will be cancelled by the permeability films, or be reflected in any one of the polymer films until the energies of the electromagnetic waves are consumed, or be absorbed by the carbon group compound structure and be transferred into thermal energy.
摘要:
To provide an electromagnetic wave shielding laminate having a high visible light transmittance and having a low resistance and a high moisture resistance available at a low cost, and a display device using it. An electromagnetic wave shielding laminate 1 comprising a transparent substrate 2 and an electromagnetic wave shielding film 100 formed on the substrate, wherein the electromagnetic wave shielding film 100 has, sequentially from the substrate 2 side, a first high refractive index layer 31 made of a metal oxide having a refractive index of at least 2.0, a first oxide layer 32 containing zinc oxide and titanium oxide as the main components, an electroconductive layer 33 containing silver as the main component and a second high refractive index layer 35 made of a metal oxide having a refractive index of at least 2.0.
摘要:
A conductive pattern (12) basically has a substantially polygonal outline shape which is a polygon and can have a high peak value of the electromagnetic wave absorption amount as compared to a case when the conductive pattern has a circular outline shape. Thus, the conductive pattern is basically a polygon and at least one corner portion is shaped in curve. This minimizes the shift of the frequency at which the absorption amount becomes a peak value by the polarization direction of the electromagnetic wave. Accordingly, it is possible to realize an electromagnetic absorber having an excellent electromagnetic wave absorption characteristic exhibiting a high peak value of the absorption amount of the electromagnetic wave and a small shift of frequency at which the absorption amount becomes a peak value by the polarization direction of the electromagnetic wave.
摘要:
The problem of the present invention is to offer a wave absorber that has reflection attenuation capability sufficient to enable prevention of communication disturbances due to reflection and the like of EM waves, that enables greater thinness and lighter weight, and that has wide-band attenuation properties, as well as a manufacturing method of the wave absorber. The wave absorber of the present invention has a structure which sequentially laminates a grid-like conductor layer composed of an electric conductor, a first dielectric layer, a high-resistance conductor layer having a surface resistivity within a prescribed range, a second dielectric layer, and a pattern layer having multiple patterns composed of an electric conductor, wherein each pattern in said pattern layer differs in either or both of size and form relative to another adjacent pattern.
摘要:
Multi-layered moldings and methods for manufacturing multi-layered moldings. A metallized layer (40) can be deposited on at least one side of a substrate (38). The substrate (38) can be shaped and then the metal layer (40) can be deposited onto the shaped substrate (38). Optionally, an injection molded resin (43) can be deposited onto the substrate (38) and/or metal layer (40).
摘要:
In an electronic component (11) comprising an electronic circuit or a circuit element in a metallic case comprising a case (13) and a cover (39), a magnetic thin film (51) made of a magnetic loss material is provided on at least one part of an inner wall surface of the metallic case. In the magnetic loss material, its composition is represented by M-X-Y, wherein M denotes at least one of Fe, Co and Ni, X denotes at least one of elements other than M and Y, and Y denotes at least one of F, N and O. The maximum value µ"max of an imaginary part µ", which is an imaginary number component of a complex permeability of the magnetic loss material, exists within a frequency range from 100MHz to 10GHz. A relative bandwidth bwr is not greater than 200% where the relative bandwidth bwr is obtained by extracting a frequency bandwidth between two frequencies at which the value of µ" is 50% of the maximum µ" max and normalizing the frequency bandwidth at the center frequency thereof. It is possible to provide an electronic component comprising a metallic case, which contains a high-speed operation type of semiconductor device and/or an electronic circuit and in which undesired radiation is reduced.
摘要:
A silicone gel sheet is heat-molded from a silicone gel composition comprising metal oxide magnetic particles and a thermoconductive filler. The sheet has a high electromagnetic wave absorbing property at a frequency ranging from 500 to 800MHz. The hardness of the composition after hardening treatment is set in the range of 10-95 when measured with an ASKER F-type hardness meter. The metal oxide magnetic particles used here can be either Mn-Zn ferrite or Ni-Zn ferrite whose average particle diameter is 1-50 µm. For the thermoconductive filler, a metal oxide, aluminum nitride, boron nitride, silicon nitride, or silicon carbide can be used. In the silicone gel molded sheet (1), an electroconductive mesh (3) is embedded in one surface layer of the silicone gel layers (2) while the other surface (4) is provided with adhesiveness. As a result, an electromagnetic wave absorbing thermoconductive silicone gel molded sheet is provided at a low cost, and the sheet is superior both in electromagnetic wave absorbing property and thermoconductivity.