Nec Tokin Corporation

Honda Motor Co., Ltd.

Satoshi Shiratori

Masaki Takahashi

Yoshio Awakura

Shinya Watanabe

Hiroshi Ono

Koji Kamei

Daisuke Nakazono

Yoshiharu Komatsu

Yasuhiro Kume

Makoto Takayanagi

In order to provide a wiring board comprising a magnetic material effective in suppressing spurious radiation in semiconductor devices and electronic circuits and the like that operate at high speeds, a wiring board () comprises an insulative base material (), conductor patterns (to) formed thereon, and magnetic thin films (to) formed on the conductor patterns (to). The magnetic thin film is configured of a magnetic loss material represented by M-X&#x2014;Y, where M is at least one of Fe, Co, and Ni, X is at least one element other than M or Y, and Y is at least one of F, N, and O, the maximum value &#x3bc;&#x2033;max of the loss factor &#x3bc;&#x2033; that is an imaginary component in the complex permeability characteristic of the magnetic loss material exists within a frequency range of 100 MHz to 10 GHz, and a relative bandwidth bwr is not greater than 200% or not smaller than 150% where the relative bandwidth bwr is obtained by extracting a frequency bandwidth between two frequencies at which the value of &#x3bc;&#x2033; is 50% of the maximum &#x3bc;&#x2033;and normalizing the frequency bandwidth at the center frequency thereof.

Wiring board comprising granular magnetic film

In order to provide a wiring board comprising a magnetic material effective in suppressing spurious radiation in semiconductor devices and electronic circuits and the like that operate at high speeds, a wiring board () comprises an insulative base material (), conductor patterns (to) formed thereon, and magnetic thin films (to) formed on the conductor patterns (to. The magnetic thin film is configured of a magnetic loss material represented by M&#x2014;X&#x2014;Y, where M is at least one of Fe, Co, and Ni, X is at least one element other than M or Y, and Y is at least one of F, N, and O, the maximum value &#x3bc;&#x2033;max of the loss factor &#x3bc;&#x2033; that is an imaginary component in the complex permeability characteristic of the magnetic loss material exists within a frequency range of 100 MHz to 10 GHz, and a relative bandwidth bwr is not greater than 200% or not smaller than 150% where the relative bandwidth bwr is obtained by extracting a frequency bandwidth between two frequencies at which the value of &#x3bc;&#x2033; is 50% of the maximum &#x3bc;&#x2033;and normalizing the frequency bandwidth at the center frequency thereof.

In order to provide a wiring board comprising a magnetic material effective in suppressing spurious radiation in semiconductor devices and electronic circuits and the like that operate at high speeds, a wiring board () comprises an insulative base material (), conductor patterns (to) formed thereon, and magnetic thin films (to) formed on the conductor patterns (to). The magnetic thin film is configured of a magnetic loss material represented by M-X-Y, where M is at least one of Fe, Co, and Ni, X is at least one element other than M or Y, and Y is at least one of F, N, and O, the maximum value &#x3bc;&#x2033;max of the loss factor &#x3bc;&#x2033; that is an imaginary component in the complex permeability characteristic of the magnetic loss material exists within a frequency range of 100 MHz to 10 GHz, and a relative bandwidth bwr is not greater than 200% or not smaller than 150% where the relative bandwidth bwr is obtained by extracting a frequency bandwidth between two frequencies at which the value of &#x3bc;&#x2033; is 50% of the maximum &#x3bc;&#x2033;and normalizing the frequency bandwidth at the center frequency thereof.

In order to provide a wiring board comprising a magnetic material effective in suppressing spurious radiation in semiconductor devices and electronic circuits and the like that operate at high speeds, a wiring board ( ) comprises an insulative base material ( ), conductor patterns ( to ) formed thereon, and magnetic thin films ( to ) formed on the conductor patterns ( to ). The magnetic thin film is configured of a magnetic loss material represented by M&mdash;X&mdash;Y, where M is at least one of Fe, Co, and Ni, X is at least one element other than M or Y, and Y is at least one of F, N, and O, the maximum value &mgr;&Prime;max of the loss factor &mgr;&Prime; that is an imaginary component in the complex permeability characteristic of the magnetic loss material exists within a frequency range of 100 MHz to 10 GHz, and a relative bandwidth bwr is not greater than 200% or not smaller than 150% where the relative bandwidth bwr is obtained by extracting a frequency bandwidth between two frequencies at which the value of &mgr;&Prime; is 50% of the maximum &mgr;&Prime; and normalizing the frequency bandwidth at the center frequency thereof.

In an electronic component ( ) comprising an electronic circuit or a circuit element in a metallic case including a case ( ) and a cover ( ), a magnetic thin film ( ) 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&mdash;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 &mgr;&Prime;max of an imaginary part &mgr;&Prime;, 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 &mgr;&Prime; is 50% of the maximum &mgr;&Prime; 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.

Growing community of inventors

Tokyo, Japan

Satoshi Shiratori