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AssigneeNEC Tokin Corporation
InventorsYoshio Awakura, Koji Kamei, Satoshi Shiratori
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In an electronic component (11) comprising an electronic circuit or a circuit element in a metallic case including 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 100 MHz to 10 GHz. 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 including 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.
An electronic component comprising an electronic circuit or a circuit element in a metallic case provided with a magnetic thin film made of a magnetic loss material, wherein the magnetic loss material has a composition 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, and is a narrow band magnetic loss material such that the maximum value μ″max of an imaginary part μ″ exists in a frequency range of 100 MHz to 10 GHz in complex permeability characteristics and that 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.
An electronic component comprising an electronic circuit or a circuit element in a metallic case provided with a magnetic thin film made of a magnetic loss material, wherein the magnetic loss material has a composition 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 0, and is a broad band magnetic loss material such that the maximum value μ″max of an imaginary part μ″ exists in a frequency range of 100 MHz to 10 GHz in complex permeability characteristics and that a relative bandwidth bwr is not smaller 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.
Dependencies are inferred from the claim text.